topic: Freshwater Ecosystems

topic: Freshwater Ecosystems

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Tackling climate change in one of Colombia’s largest wetlands
- La Mojana, a complex network of more than 500,000 hectares (1.2 million acres) of different types of wetlands, has drastically deteriorated in recent decades.
- Thousands of farmers are working to restore their livelihoods, and the swamps, marshes and streams they inhabit.
- By doing so, they hope that floods and droughts, which are becoming more unpredictable and more severe than ever due to climate change, will affect them less.

Venezuela’s shrimp farms push for sustainability against hardship and oil spills
- Venezuela’s aquaculture industry used to go unnoticed in a national economy revolving around the oil industry, but has gained prominence since 2019 despite revenue cuts and the economic crisis.
- Oil spills from disintegrating crude infrastructure compelled shrimp farms to move from an open system that took water from Lake Maracaibo and the Caribbean Sea, to a closed system that’s not only more profitable but also provides environmental benefits for communities and yields healthier shrimp.
- In 2023, farmed shrimp was Venezuela’s sixth-largest export by value; while the top export markets are in Europe, China has become the industry’s fastest-growing destination.
- While the industry has found ways to thrive amid adversity, it says it needs more help from the government, including on supplies of fuel and electricity, on research, and on nurturing a more secure and stable regulatory climate.

Saving Asia’s fishing cat means protecting threatened wetland habitat
- Fishing cats are uniquely adapted to life in wetlands, possessing a double-layered coat that serves as a water barrier and insulation, partially webbed feet, ears that plug when submerged, and a curious call reminiscent of a duck.
- Spread across Asia, this small wild cat species faces myriad threats, including habitat loss, hunting and retaliatory killings, road kill, and more. Considered vulnerable across its range, the felid is also elusive and underresearched, with many knowledge gaps about its distribution and ecology.
- Conservationists are working across its range to raise the profile of this wildcat, reduce threats and understand the species. Linking its protection to equally threatened wetlands is vital, they say. Initiatives such as the Fishing Cat Project in India have achieved success in making this cat the face of these habitats.
- Multiple conservation and research projects operate in Asia under the banner of the Fishing Cat Conservation Alliance, a cooperative model that provides funding lifelines and enables international collaboration to protect this small cat.

Indigenous efforts to save Peru’s Marañon River could spell trouble for big oil
- In March, the Federation of Kukama Indigenous Women in the Parinari district of Loreto won a lawsuit against the oil company Petroperú and the Peruvian government, protecting the Marañon River from oil pollution.
- Since the 1970s, the exploration of oil reserves in the Peruvian Amazon has resulted in hundreds of oil leaks and spills, compromising the health of Indigenous communities.
- While the defendants have already appealed the decision, a favorable ruling in higher courts could force oil and gas companies to answer for decades of pollution in the Peruvian Amazon.

One of Colombia’s largest estuary ecosystems is drying up, communities warn
- Decades of sediment pollution, contamination and government infrastructure projects have disrupted the natural flow of saltwater and freshwater into the Ciénaga Grande of Santa Marta, one of Colombia’s key wetlands and a major estuary on the Caribbean Sea.
- Fish stocks have also plummeted, with profitable, big species being replaced by smaller ones and leaving fishing communities without their livelihoods.
- Although authorities claim that they are investing in the region, locals complain the autonomous corporation in charge is not taking steps to dredge the canals and that there isn’t enough transparency on how the money is being spent.

Indonesian court jails environmentalist for flagging illegal farms in marine park
- An Indonesian court has sentenced an environmental activist to seven months in jail for a Facebook post in which he criticized the growing problem of illegal shrimp farms operating inside a marine park.
- The court found that Daniel Frits Maurits Tangkilisan had “created unrest” because of his post, under a controversial 2008 law on online speech that’s been widely used to silence environmental and human rights activists.
- Three other activists face similar charges in the case, which centers on their efforts to highlight the presence of illegal shrimp farms inside Karimunjawa National Park, which is supposed to be a protected area.
- Fellow rights activists have lambasted the ruling against Daniel, saying it sets a dangerous precedent for exploitation of the justice system to silence and criminalize individuals.

Indonesian activists face jail over FB posts flagging damage to marine park
- Four environmental activists in Indonesia face up to 10 months in jail for “hate speech” after complaining online about the proliferation of illegal shrimp farms inside a marine park.
- Karimunjawa National Park, which is supposed to be a protected area, has seen the number of such farms inside its borders proliferate in recent years, which groups like Greenpeace have linked to ecosystem degradation.
- Daniel Frits Maurits Tangkilisan is the first of the four members of the #SaveKarimunjawa movement to go to court; a verdict in his case is expected on April 4.
- All four men have been charged under a controversial 2008 law on online speech, which critics say has been abused vigorously by the Indonesian state to stifle dissent and opposition.

Irrawaddy dolphin death in Thailand’s Songkhla Lake underscores conservation needs
- As few as 14 critically endangered Irrawaddy dolphins remain in the world’s smallest freshwater population of the species, in southern Thailand’s Songkhla Lake.
- The recent death of one of the remaining few raised the alarm among cetacean specialists, who say more must be done to save the imperiled population.
- Teetering on the brink of extinction, the dolphins face a slew of threats from entanglement in fishing nets, depletion of fish populations, and deteriorating lake conditions due to increasing pressures from agriculture, industry and infrastructure development.
- Experts say a “once-in-a-lifetime” opportunity to reverse the dolphin’s trajectory of decline is on the horizon in the form of major funding for dolphin conservation linked to a road bridge megaproject, but they warn it will only be successful if government agencies can put aside their competing agendas.

Rising temperatures threaten the tiny animals responsible for groundwater quality
- A new study compared temperatures inside 12 caves around the world with their respective surfaces, showing that average annual temperatures in underground systems tend to mirror those of the surface, but with far less variation.
- The researchers also found that while some caves follow outdoor temperatures with little or no delay, others have temperatures that are very asynchronous with the surface, being at their warmest when the world outside is at its coldest, and vice versa.
- Scientists also detected the existence of daily thermal cycles in the deepest sections of some caves, suggesting that such cycles might mark the circadian rhythms of cave-adapted organisms.
- The results indicate that underground fauna — with many species ill-adapted to handle large temperature variations — might be at threat due to climate change, and that their extinction might risk the water quality of aquifers worldwide.

Fishers’ memories on par with scientific data on historic catches: Study
- A new study investigated how the memories of about 400 fishers from traditional communities in Brazil can serve as sources of data on historic fishing effort and catch size.
- It measured the reliability of this “harvest recall data” by comparing it to other data collected by standard scientific methods.
- The researchers found that when considered as a whole, the fishers’ memories agreed with standard data collection methods about 95% of the time, which suggests that this recall method can be an effective fisheries management tool.

Culture and conservation thrive as Great Lakes tribes bring back native wild rice
- Wild rice or manoomin is an ecologically important and culturally revered wetland species native to the Great Lakes region of the United States and Canada, which once covered thousands of acres and was a staple for Indigenous peoples.
- Over the past two centuries, indiscriminate logging, dam building, mining, and industrial pollution have decimated the wild rice beds, and today climate change and irregular weather patterns threaten the species’ future.
- In recent years, native tribes and First Nations, working with federal and state agencies, scientists and funding initiatives, have led wild rice restoration programs that have successfully revived the species in parts of the region and paved the way for education and outreach.
- Experts say more research and investments must be directed towards wild rice, and such initiatives need the support of all stakeholders to bring back the plant.

Nile Basin farmers grow food forests to restore wetlands and bring back a turtle
- Sugarcane is a widely grown crop in the Nile Basin, but its destructive effects on soils, water resources and biodiversity have become increasingly apparent.
- As the thirsty crop draws down water resources, aquatic species like the critically endangered Nubian flapshell turtle suffer a loss of habitat, forage and nesting sites.
- In an effort to revive soils, diversify diets and incomes, and boost water levels that many animals rely on, communities are implementing agroforestry projects in lieu of monocultures.
- The resulting “food forests” attract an array of wildlife while refilling wetlands and river systems where the culturally important flapshell turtles swim.

Hydropower in doubt as climate impacts Mekong Basin water availability
- Warmer and drier wet seasons in the upper basin of the Mekong River are affecting the availability of water for hydropower generation along the major watercourse, according to a new analysis.
- At a recent online discussion, regional experts questioned the viability of hydropower on the Mekong as a long-term, sustainable energy solution, given the increasing presence of climate risks.
- With large-scale dams in upper parts of the basin failing to fill their reservoirs, panelists at the event asked whether they are truly worth their documented impacts on downstream ecosystems, livelihoods and communities.
- Panelists recommended continued information sharing and improved coordination of dam operations to preserve the river’s crucial flood pulse that triggers the seasonal expansion of Tonle Sap Lake in Cambodia, and also highlighted the conservation importance of the Tonle Sap watershed, including tributaries in Cambodia’s Cardamom Mountains.

Andes community-led conservation curbs more páramo loss than state-protected area: Study
- In the central highlands of Ecuador, land managed by Indigenous peoples and local communities is associated with improved outcomes for drought adaptation and páramo conservation, according to a new study.
- The study finds that páramo areas managed by communities in this region are better protected than those under the care of the state.
- Due to the advance of the agricultural frontier in the highlands, approximately 4 hectares (9.9 acres) of páramo are lost every day, which threatens the water supply of the entire region.
- Community-led land management that incorporates inclusive participation, traditional knowledge and the cultural values of those who inhabit the areas, coined by reseachers as “social technology,” can aid in the conservation of the páramo.

Indus River dolphins’ survival is our responsibility (commentary)
- Indus River dolphins are distinguished by their elongated noses and small, nearly vestigial eyes.
- Once thriving in the lower parts of the Indus and its tributaries, their numbers have dwindled due to various environmental stresses.
- “Their story is not just about their survival but also about our responsibility to safeguard our planet’s diverse and increasingly vulnerable wildlife for future generations,” a new op-ed argues.
- This post is a commentary. The views expressed are those of the author, not necessarily Mongabay.

Amazon catfish must be protected by the Convention on Migratory Species COP-14 (commentary)
- The latest Convention on Migratory Species of Wild Animals (also known as the Bonn Convention) meeting (COP-14) is taking place in Uzbekistan this month, and the government of Brazil has proposed protections for two catfish species with extraordinary migrations, the dorado and piramutaba (manitoa).
- The dorado’s migratory journey for instance spans a distance of 11,000+ kilometers round trip, from the Andes to the mouth of the Amazon River, and along the way it connects multiple ecosystems and feeds local and Indigenous fishing communities, but is under increasing threat.
- “During COP-14, the dorado and piramutaba will take a prominent place thanks to the Brazilian Government’s proposal to include them in CMS Appendix II…It is essential that the governments at the meeting adopt Brazil’s proposal,” a new op-ed argues.
- This article is a commentary. The views expressed are those of the author, not necessarily Mongabay.

Communities on troubled Java river mold future from plastic waste
- The Ciliwung is a highly polluted river running from Mount Pangrango in western Java, through the city of Bogor, before ending in the bay north of Jakarta, Indonesia’s capital.
- Since 2018, Bogor Mayor Bima Arya Sugiarto has overseen an initiative to rehabilitate the river, which was awash with plastics and dangerous levels of fecal coliform bacteria.
- Bogor is among more than 50 global cities participating in the Plastic Smart Cities, initiated by WWF to help eliminate plastics from nature.

In Nepal’s Chitwan, tourist pools spell possible trouble for environment & wildlife
- Hoteliers say they believe there’s a growing demand for swimming pools in Nepal’s Sauraha tourist town due to a domestic tourism surge.
- However, unregulated proliferation of pools raises ecological concerns for Chitwan National Park and its diverse wildlife.
- Potential environmental threats include chlorine impact, disinfectant by-products and heavy metal contamination, prompting calls for sustainable tourism practices.

In Mexico, Xalapa’s chronic water scarcity reflects a deepening national crisis
- Residents of Xalapa, the capital of Veracruz, Mexico, have been struggling with a worsening water shortage that often leaves people without daily access to household water for washing.
- The problem is nationwide, in 30 of 32 states, forcing residents to purchase and recycle water and postpone bathing.
- Experts have blamed climate change and extreme heat for the country’s water shortages; others also blame corruption that allows companies to pay for unlimited water use.
- Deforestation for development, an increase in construction and building and population increases are also factors.

Courage & calm despite attacks: Q&A with Colombian activist Yuly Velásquez
- For years, Colombia’s largest oil refinery, owned by the national oil company Ecopetrol, has discharged oil and toxic waste into water bodies, impacting fish and the livelihoods of fishers.
- Yuly Velásquez, a local fisher and president of an environmental organization, has spent years documenting water contamination and corruption linked to the refinery, and she faces consistent threats and attacks.
- According to a 2022 report by the NGO Global Witness, Colombia is the most dangerous country in the world for environmental and land defenders, with 60 murders that year.
- In this interview with Mongabay, she discusses the threats environmental defenders face in Colombia and what helps her stay resilient in the face of attacks.

Indigenous effort in Bangladesh helps reverse endangered fish’s slide to extinction
- Unchecked logging and quarrying of rocks from streambeds in Bangladesh’s Chittagong Hill Tracts led to springs drying up and populations of putitor mahseer fish, an endangered species, disappearing.
- The situation was worsened by climate change impacts, characterized here by a more intense dry season during which even streams that once ran year-round now dry up.
- A project launched in 2016 and backed by USAID and the UNDP is working with Indigenous communities to reverse this decline, starting with efforts to cut down on logging and quarrying.
- As a result of these efforts, areas where forests have been conserved have seen the flow of springs stabilize and populations of putitor mahseer and other fish revive.

Why the Amazon’s small streams have a major impact on its grand rivers
- An unprecedented time-series study in the basin of the Tapajós River, a major tributary of the Amazon, assesses the level of degradation of small rivers threatened by agribusiness expansion.
- Researchers from several universities will assess the conservation status of 100 streams spread between the municipalities of Santarém and Paragominas, at the confluence of the Tapajós and the Amazon, which were first analyzed in 2010.
- The impact of dirt roads and their network of river crossings, which causes sediment load, siltation, erosion and changes in water quality, was one of the factors that caught researchers’ attention in the initial time-series study.
- Experts say that local development models should ideally start from water to land, rather than the other way around, given the importance of water for the rainforest, its biodiversity, and the inhabitants who depend on both.

Illegal gold mining threatens Indus River water and biodiversity in Pakistan (commentary)
- The Indus River in Pakistan is being extensively disturbed by unregulated mining of the river’s bed (‘placer mining’) for gold.
- Numerous operations employing an estimated 1,200 heavy machines dig daily into the riverbed and dump buckets of sediment and rocks into screening devices, destroying habitat and muddying the water flowing downstream.
- “It is crucial to the development for the region’s economy and environmental preservation efforts to regulate placer gold blocks along the Indus River,” a new op-ed argues.
- This post is a commentary. The views expressed are those of the author, not necessarily Mongabay.

As Sri Lanka floods swell with climate change, so does human-crocodile conflict
- Sri Lanka is among the countries most vulnerable to climate change, with long drought spells, receiving intense rain during a shorter period with a marked increase in flood events.
- During flooding, crocodiles inhabiting rivers tend to reach land and move closer to human settlements, increasing the risk of encounters with people.
- The Nilwala River flows through southern Sri Lanka and recent flood events have increased croc encounters with humans in the Matara district and escalated threats to human safety, resulting in disaster management responses.
- During recent flooding events, no serious incidents linked to crocodiles were reported, but wildlife officials had to chase crocs away from riverbanks, highlighting the need for an immediate and durable solution for the human-crocodile conflict around the Nilwala River area.

Salmon and other migratory fish play crucial role in delivering nutrients
- Pacific salmon can play a key role in transporting nutrients from marine to freshwater and terrestrial ecosystems.
- In the past, Pacific salmon and other anadromous fish that spawn in freshwater and spend part of their life in the ocean likely played a much larger role in global nutrient cycles, scientists find.
- But today, many populations of Pacific salmon and other anadromous fish are under pressure from habitat loss, overfishing, climate change, dams and other pressures that have greatly reduced their numbers, weight and ability to migrate freely.
- Population declines could further curtail their role in global nutrient transport in future, with increasing consequences, especially for nutrient-poor ecosystems that have relied in the past on migratory fish for significant nutrient additions.

Study: Fishing with pesticides and dynamite puts Ecuadorian Amazon in peril
- Illegal fishing with agrochemicals and explosives across several of Ecuador’s Amazonian states is an uncontrolled problem, causing long-lasting, irreversible damage to aquatic ecosystems, recent research has shown.
- The study links high levels of poverty to the wider practice of unsustainable fishing, and calls for tighter controls on the sale and availability of agrochemicals and dynamite across the country.
- Fish caught using toxic chemicals can be dangerous for human consumption, the study warns, and says there should be more action to help educate communities about these dangers.

Could mugger crocodiles be brought back from regional extinction in Bangladesh?
- Once, mugger crocodiles (Crocodylus palustris) were common in Bangladesh’s major rivers, including the Padma, Jamuna, Meghna and most of their tributaries, but the species is thought to have gone extinct in the country due to unchecked poaching for its prized skin.
- Although the IUCN in 2000 declared the mugger regionally extinct in Bangladesh, three adult muggers were recovered from the country’s river and water bodies in only 11 days, Oct. 17-28 this year.
- The crocodiles were taken to the Karamjol Crocodile Breeding Centre in Khulna, and authorities are working on how muggers could be brought back to nature by increasing their population through captive breeding.
- Experts suggest establishing a safe zone for the crocodiles in the upper Padma River.

With half its surface water area lost, an Amazonian state runs dry
- Water bodies across the Brazilian state of Roraima have shrunk in area by half over the past 20 years, according to research from the mapping collective MapBiomas.
- Today, locals are facing even drier times amid a severe drought in the Amazon, which has led to record-low levels of water in the rainforest’s main rivers.
- Since 1985, Roraima’s agricultural area has grown by more than 1,100%, with experts pointing to crops as one of the state’s main drivers of water loss.

Cocopah Tribe aims to restore Colorado River habitat — and tribal culture
- On the lands of the Cocopah Tribe in the U.S. state of Arizona, declining water levels on the Colorado River have paved the way for invasive plants to take over a riverside once full of native trees.
- Native vegetation along the river not only provides habitat for wildlife but also has shaped Cocopah culture by providing resources to build homes, art and other items.
- This year, the Cocopah Tribe’s Environment Protection Office cut the ribbon on a project to restore land along the river to what it looked like decades ago, complete with a walking trail.
- For 2024, the tribe plans to use $5.5 million in grant funding to restore habitat and plant native trees along an even longer stretch of the river, helping to preserve Cocopah culture for generations to come.

Thailand tries nature-based water management to adapt to climate change
- With an economy largely underpinned by irrigated crops like rice, water is a crucial resource in Thailand. But as climate change exacerbates floods and droughts in the country, sustainable water management is an increasing challenge.
- Nature-based solutions that incorporate the natural processes of the country’s abundant rivers, floodplains and watershed forests are beginning to be trialed via various projects at large and small scales.
- A new report assesses the efficacy of two nature-based approaches to water management in Thailand, which represent a step away from the country’s typically top-down, hard-engineering approach and present several benefits to the environment and communities.
- However, environmental and societal tradeoffs, complex policy frameworks, and the need for greater understanding and expertise around the concept, design and implementation of nature-based approaches are barriers to their widespread implementation.

Quilombola communities take iron mine to U.K. court, alleging decade of damages
- Afro-Brazilian communities in the Brazilian state of Bahia are applying to the English courts for compensation for a decade of alleged pollution and disruptions from a nearby iron ore mine.
- The allegations date back to 2011 and include air and noise pollution, physical and psychological damage from mining operations, and possible water contamination, which the communities blame on a subsidiary of U.K.-registered Brazil Iron Limited.
- Brazil Iron denies the allegations and says they could undermine a new project it plans to begin soon that will bring billions of dollars and thousands of jobs to the region.
- The case has already led to the court issuing an injunction against Brazil Iron for sending letters to community members; the case, in which 80 community members are seeking individual compensation, must first settle on whether the English courts have jurisdiction in the matter.

Dam-building on Mekong poses risk to regional industries, report says
- A new report from WWF highlights how vital regional supply chains that rely on a healthy and connected Mekong River are undermined by hydropower development.
- Recent decades have seen scores of hydropower dams built on the Mekong River system, including 13 large-scale projects spanning the river’s mainstream channel, with hundreds more either planned or under construction.
- The report looks at how the economic value of hydropower in the Lower Mekong Basin measures up against its high economic trade-offs for five key sectors that underpin regional economies.
- The report provides recommendations for governments, investors and businesses to understand the true cost of hydropower and mitigate the inevitable risks they face over the decades to come.

Nepal’s water hyacinth helps exotic fish invade, harming native species: Study
- Exotic fish species such as Nile tilapia and glassfish were introduced by humans to Pokhara, Nepal’s Lake City for various reasons, and they compete with and prey on native fish species.
- A study suggests that water hyacinth, an invasive plant species, could be helping exotic fish species in Pokhara’s lakes to invade the lakes and reduce the diversity and abundance of native fish species.
- The researchers suggest that urgent conservation action is needed to control the spread of both water hyacinth and exotic fish species, and to protect the native fish species and the ecosystem of the lakes.

Poisoned for decades by a Peruvian mine, communities say they feel forgotten
- Communities in Cerro de Pasco, Peru, have been living for decades with contamination from mining activities, which has had serious health consequences, ranging from chronic to fatal diseases.
- Repeated environmental samplings have shown that heavy metal levels surpass by hundreds of times national and World Health Organization safe limits; the most recent research by the NGO Source International reveals persistently high levels of contamination in Cerro de Pasco’s waters and soils.
- IQ levels in children living in Cerro de Pasco have been significantly impacted by exposure to heavy metals.
- Both the Peruvian government and Volcan, the mining company operating in Cerro de Pasco, have done little to nothing to remediate contamination and respond to the communities’ pleas for help.

More action needed to protect freshwater ecosystems, report says
- A recent report from the international conservation NGO WWF argues that freshwater ecosystems are too valuable to go overlooked as new conservation policies are created.
- Freshwater underpins global food security, the economy and public health, putting the total value of water in 2021 at around $58 trillion, or 60% of the global GDP, the report estimates.
- WWF urged governments to revitalize efforts to conserve 30% of rivers, lakes and wetlands by 2030 and for the private sector to develop better risk assessments that eliminate pollution from their supply chains and consider how they contribute to water scarcity.

Fishing ban extension raises hopes for iconic Amazon pink river dolphin
- The Amazon river dolphin, or boto, is an integral feature of the rainforest’s biodiversity and culture, and is central to several Indigenous tales.
- Even though the dolphin isn’t fished for human consumption, it’s become endangered over the decades because fishers use its flesh as bait for catching piracatinga catfish.
- The Brazilian government earlier this year renewed a moratorium on fishing of piracatinga, first imposed in 2014, in the hope of saving the dolphin, but experts say fishers have just been ignoring the rule.
- The measure became even more relevant in October following the detection of more than 100 dead dolphins in an Amazon lake — experts suspect that the deaths are directly linked to the extreme drought affecting the region.

Conservationists condemn Nepal proposal to allow hydropower in protected areas
- The Ministry of Forest and Environment has proposed a new procedure that would allow large-scale hydropower development inside protected areas, with fewer environmental safeguards and more legal loopholes.
- Conservationists and legal experts have criticized the proposal as going against the Constitution and the National Parks and Wildlife Conservation Act as well as risking the biodiversity and ecosystem services of Nepal’s protected areas.
- They have also warned that the proposal could undermine the balance between development and conservation and expose the country to more climate change impacts such as floods and landslides.
- The Department of National Parks and Wildlife Conservation has defended the proposal as documenting the existing practices and bolstering the balance, not upsetting it.

First otter sighting in Nepal’s Chitwan park in two decades raises questions
- A wildlife photographer snapped images of a smooth-coated otter in the Rapti River in Chitwan National Park, where the species hadn’t been recorded in more than two decades.
- The species is one of the three otter species believed to live in Nepal, all of which are threatened by habitat loss and river pollution caused by hydropower development, sand mining and agricultural runoff.
- Researchers have called for funding to install camera traps in the Rapti to monitor the presence of otters there.

NASA satellites reveal restoration power of beavers
- A new partnership between NASA and researchers is measuring the impact of beavers reintroduced to landscapes in Idaho.
- Beavers are one of the world’s most powerful ecosystem engineers, building new habitats by slowing water flow and reducing flooding, while also boosting biodiversity.
- Beavers are all the more important in an age of rapid climate change, as they produce wetter and more resilient habitats, even in the face of wildfires.
- “NASA is interested in how satellite Earth observations can be used for natural resource management,” a member of the space agency’s Ecological Conservation Program tells Mongabay.

Muddied tropical rivers reveal magnitude of global gold mining boom: Study
- A new study reveals that 59,000 kilometers, or nearly 37,000 miles, of tropical rivers have been damaged by mining, based on 7 million measurements taken from satellite images spanning four decades.
- The new study reveals a runaway river mining boom starting in the mid-2000s, largely caused by a tremendous spike in gold prices since the 2007-2008 financial crisis. Since then, the price of gold — an element which accounts for 90% of river mining in the tropics — has only gone up.
- An estimated 5-7% of the world’s large tropical rivers are considered severely affected by sediment from river-mining activities, with 173 large rivers impacted in the global tropics.
- Up to a third of global freshwater fish species are found in tropical rivers. Mining, much of it illegal or informal, seriously impacts both human and natural communities in numerous ways. Sediment traps aquatic life in dense, cloudy, muddied water, with sunlight unable to reach plants and fish.

Philippines’ largest freshwater wetland and Indigenous livelihoods face multiple threats
- The floating community of the Manobo Indigenous tribe depend on the rise and fall of water in the Philippines’ Agusan Marsh; however, the marsh faces challenges that threaten its ecosystem and the lives of the people who depend on it.
- Development projects, locals and others moving into the fertile region are burning and draining the peatlands and swamp forests for conversion into farmland.
- The continued expansion of agricultural areas in the Agusan Marsh, known as the Philippines’ least-disturbed freshwater wetland, has changed habitats in the basin and, with land use conversion, fragmented ecosystems.
- A recent study published in the journal Nature found extensive global wetland loss over the past three centuries due to various causes, including similar ones seen in the Agusan Marsh.

How biological surveys prevent destructive dams in the Balkans
- Over 3,000 hydropower dams are proposed to be built in the next few years on Balkan rivers.
- A conservation research and advocacy project says this number is too high, due to such dams’ likely detrimental effects on fragile freshwater ecology, and argues that permits granted to hydropower companies do not take biological richness adequately into account.
- The Balkan country of Albania agreed with them recently, using the group’s data as part of its decision to cancel a giant dam project proposed for the Vjosa River, and instead named the area a national park.
- Mongabay visited the group’s latest biological survey of the Neretva River in Bosnia-Herzegovina and shares this new video report.

Can Spain keep the rising sea from washing away a critical delta?
- One of Europe’s most important deltas, a vital wildlife sanctuary and economic engine, is facing a myriad of threats stemming from climate change and water management.
- Rising sea levels and stronger storms are washing away the very sediment that constitutes the Ebro Delta and sending saltwater far inland.
- The government plan to bolster the delta relies heavily on trucking sediment to its exposed outer banks, but it’s a stop-gap measure until researchers can develop a more sustainable long-term solution.
- The question is: Can they find one in time?

Death of rare male gharial in Nepal highlights conservation crisis
- A male gharial, a critically endangered crocodilian, was found dead in Nepal’s Chitwan National Park, entangled in a fishing net and hook.
- Male gharials are vital for the survival of the species, which has a skewed sex ratio and faces threats from fishing, habitat loss, and poaching.
- Park officials are trying to boost the male population by incubating eggs at a certain temperature, but critics question the effectiveness and sustainability of this approach.

Indonesia to expand ‘smart fisheries’ program aimed at empowering communities
- Indonesia will expand its smart fisheries village program, aiming to empower fishing communities to boost their productivity, achieve sustainability standards, and improve their overall economic welfare.
- Twenty-two fishing communities are enrolled in the initial batch of the program, which will focus primarily on fisheries, but also look to improve community welfare through tourism, public health interventions, financial literacy, and other initiatives.
- The participating communities are involved in catching or farming a wide range of seafood and other products, from octopus and tilapia to shrimp and organic salt.
- The fisheries sector employs about 12 million Indonesians, with most of the fleet today, about 650,000 vessels, operated by small-scale and traditional fishers.

In Bangladesh, microplastic threat to frogs is also concern for rice farming
- Researchers have found microplastics in 90% of frogs sampled from the Bengal Delta in Bangladesh.
- The finding raises concerns about the freshwater ecosystem health and rice cultivation, given that frogs are a key “natural insecticide” keeping pest numbers in check.
- The study adds to a growing body of literature on the prevalence of microplastic pollution in Bangladesh.
- Nearly a tenth of the 8,000 metric tons of trash generated daily in the country is plastic waste, for which there’s no proper disposal.

Climate change, human pressures push Bangladesh’s ‘national fish’ into decline
- Bangladesh’s all-important hilsa fishery is declining amid pressures from human-driven factors and climate change, experts and authorities warn.
- The fish, Tenualosa ilisha, contributes around 12% of the total fish catch in Bangladesh, and the fishery employs at least 2.5 million people across the country.
- Several government conservation initiatives, including declaring six hilsa sanctuaries and two fishing bans during the year, have helped boost production in the past two decades.
- However, pressures persist, including rising salinity levels in the rivers where the fish spawn, discharge of pollution and agricultural runoff, and disruptions to water flow as dams are built upstream.

Seeking environmental DNA in Himalayan rivers: Q&A with Adarsh Man Sherchan
- Conservation geneticist Adarsh Man Sherchan is one of the leading experts keeping track of the impacts that Nepal’s dozens of dams are having on freshwater species.
- The Himalayan country has more than 120 hydroelectricity plants, many of which were built without prior aquatic biodiversity assessments.
- With advances in assessment technologies, notably environmental DNA (eDNA), and a growing cohort of trained experts like Sherchan, there’s a greater focus on identifying and mitigating the impacts of dams on river life.
- In an interview with Mongabay, Sherchan talks about why eDNA is a gamechanger for monitoring species, the process of getting eDNA samples from rivers, and why jeans and flip-flops are a no-go for fieldwork.

Award-winning community group in Sumatra cleans up lake
- A group of locals have since 2013 tried to clean up the trash pooling in Lake Sipin in the Sumatran province of Jambi.
- Their efforts have received national attention, with their leader, Leni Haini, awarded the country’s highest environmental award in 2022 by the government.
- Indonesia has announced a plan to restore 15 lakes (Sipin isn’t included) across the country by 2024, citing their high degree of degradation, chiefly sedimentation, which has resulted in their rapid shrinking and a decline in the biodiversity they host.
- These lakes are crucial in supporting the livelihoods of millions of Indonesians, serving as a source of freshwater, a form of flood control, and a site for fish-farming and tourism.

Conservationists aim to save critically endangered European eels on Italy’s Po River
- European eels (Anguilla anguilla) are critically endangered, their population having plummeted by 97% since 1980.
- Illegal fishing, dams and other barriers to their migration, droughts, pollution and habitat changes are putting the eels’ survival at risk.
- These eels reproduce once in their lifetime, only in the Sargasso Sea, where they die. Their unique lifecycle and migratory pattern further complicates conservation efforts.
- In Italy’s Po River Basin, researchers are working to conserve eels through interventions including the construction of fish passages to defragment rivers, reproduction in captivity and teaching fishers to recognize and release the likeliest breeders.

Residents of southeast Alaskan town debate mine that’s bound to change region
- After years of debate, a proposed mine in southeast Alaska near the Chilkat River has a permit to dig an exploratory tunnel and release wastewater.
- The mine has become a divisive topic in the town of Haines, where the Chilkat River sustains the region’s thriving fishing industry.
- Some residents are concerned about how the project could impact salmon in the river and their fishing jobs.
- Others believe the mining companies running the project will be responsible when it comes to protecting the river, while providing jobs in mining.

Flooding for hydropower dams hits forest-reliant bats hard, study shows
- Researchers have found that bats specialized to feed on insects within the dense canopy of tropical forests are disproportionately affected by hydropower development.
- The study in Peninsular Malaysia adds to a growing body of evidence demonstrating how hydropower developments impoverish tropical ecosystems.
- Although forest-specialist bats were lost from the flooded landscape, bats that forage along forest edges and in open space were still present.
- To minimize localized extinctions, the researchers advocate a preventive rather than mitigative approach to hydropower planning that prioritizes habitat connectivity and avoids creating isolated forest patches.

Second chance for Lula as controversial Amazon dam goes up for renewal
- In the biological and cultural hotspot of the Volta Grande in Brazil’s Amazon, Indigenous communities and scientists have teamed up to monitor the impacts of the Belo Monte hydroelectric project, one of the biggest in the world.
- The dam complex has diverted 80% of the Xingu River’s water flow, significantly affecting the aquatic life in the Volta Grande river bend and pushing the entire ecosystem toward collapse, along with the local communities who rely on it.
- The complex’s environmental license, which lasts six years and dictates the amount of water flowing through Belo Monte, is currently up for review by the federal environmental protection agency, IBAMA.
- President Luiz Inácio Lula da Silva played a key role in pushing for the construction of Belo Monte, and now, back in power, can influence a new path for the environment and local communities, activists say.

Fewer migratory birds stopping at key Bangladesh wetland amid human disturbances
- Numbers of most species of migratory waterbirds in Bangladesh’s Tanguar Haor wetland, a key stopping point, have fallen over the past 15 years, a new study shows.
- The cause of the decline isn’t fully known yet, researchers say, but it’s clear that human activity has impacted the wetland, with 40% of the basin’s original area converted to farmland and settlements in just 30 years.
- The study recommends prioritizing conservation at two of the permanent waterbodies, or beels, in the Tanguar Haor complex, citing the high abundance and diversity of the birds that stop there.
- Tanguar Haor is the second Ramsar site in Bangladesh, after the Sundarbans mangrove forest, and accounted for nearly half of the more than 1.2 million waterbirds recorded in the country between 2008 and 2015.

Crud-to-crude: The global potential of biofuels made from human waste
- Creating liquid biofuels from human waste shows promise as a way to meet one of alternative energy’s greatest challenges: reducing the transportation sector’s heavy carbon footprint. The good news is there is a steady supply stream where waste is treated.
- Humanity produces millions of tons of sewage sludge annually via wastewater treatment. Existing disposal methods include landfilling, application on agricultural land, and incineration; each with social and environmental consequences.
- Harnessing the carbon-rich potential of sludge as a transportation fuel for planes, ships and trucks is part of a drive toward zero waste and creating a circular economy, say experts. A host of projects are underway to prove the effectiveness of various methods of turning all this crud into biocrude.
- Some techniques show promise in lab and pilot tests, but large-scale industrial plants have yet to be built. Using pollutant-laden sewage sludge as a biofuel comes with its own environmental concerns, but lacking a silver-bullet solution to the human waste problem, it could be part of a suite of best alternatives.

Dhaka faces manifold problems as water bodies diminish
- A study by the Bangladesh Institute of Planners, or BIP, says the capital has lost 36% of its water bodies since 2010.
- Dhaka city has experienced water scarcity during dry months, which puts a strain on firefighters as they battle large fire; during monsoon months, the city experiences regular waterlogging as water retention points fill up.
- The disappearance of water bodies has created multifaceted problems like rising water levels, airborne disease, and mosquito-related diseases.
- In 2000, the government passed the Natural Water Reservoir Conservation Act, which mandates that natural water bodies be kept intact.

Death of last female Yangtze softshell turtle signals end for ‘god’ turtle
- The last known female Yangtze giant softshell turtle died in April of unknown causes, leaving only two males as the final known living members of a species that has for years been teetering on the brink of extinction.
- “We are devastated,” says the Asian Turtle Program, an NGO working to protect the Yangtze turtle and its habitat.
- The only hope for the species lies in the possibility that a few of these giant creatures may still roam, unknown, in lakes and rivers in Vietnam or Laos.

Spamming streams with hatchery salmon can disrupt ecosystems, study finds
- In a new study, researchers found that releasing hatchery-bred native masu salmon into freshwater streams in Hokkaido, Japan, destabilized the local ecosystems.
- Overall, the study found that the total number of fish, and number of different species, both declined in the long term due to greater competition for resources like food and preferred feeding spots.
- Masu salmon populations also did not increase in the long term, the research found.
- With hatchery releases increasing in many areas — and for many species — the findings add to the ongoing debate over their wider effects on wild fish populations.

‘Chasing giants’: Q&A with megafish biologist and author Zeb Hogan
- Earth’s freshwater ecosystems are among the most at risk from human-induced threats including overfishing, dam building, pollution and climate change.
- But biologists know relatively little about the animals that live in the murky depths of our rivers and lakes, perhaps least of all about some of their largest inhabitants.
- In a new book, fish conservation biologist Zeb Hogan teams up with journalist Stefan Lovgren to get to the bottom of a curious question: What is the world’s largest freshwater fish?
- An exploration of the world’s freshwater ecosystems from Australia to the Amazon, “Chasing Giants” also looks into the range of threats giant fish face the world over and what scientists, policymakers and the public can do to support their conservation.

A Guatemalan town fights to bar gold mining and save its waters
- Over the last 25 years, local community members have repeatedly rejected a gold mining project on the border of Guatemala and El Salvador for lack of environmental compliance.
- The government of Guatemala has approved the extension of the Cerro Blanco project, which, under new ownership is planned to switch from underground to open-pit mining.
- Worried that mining is contaminating waters and affecting biodiversity, the community of Asunción Mita held a referendum last September, voting to reject the project, but it hasn’t yet obtained recognition from the state.
- While mining is on hold, awaiting a final verdict on the referendum, natural ecosystems and watercourses are bouncing back with life.

Small farmers in limbo as Cambodia wavers on Tonle Sap conservation rules
- In 2021, Cambodia’s government began enforcing a ban on farming in designated conservation zones around the Tonle Sap wetland, moving to protect the health of this vital fishery but also disrupting the lives of thousands of farmers who live around the lake.
- With general elections scheduled for July, authorities now appear to be taking a softer line on enforcing the ban; in December 2022, Prime Minister Hun Sen ordered the boundaries of the conservation zone be redrawn by the end of May this year.
- Subsistence farmers, who experts say have been given little support to find alternate forms of livelihood, wait as their futures hang in the balance.
- This story was produced in partnership with fellows of the Global Reporting Program at the University of British Columbia’s School of Journalism, Writing, and Media, and won a silver prize in the 2023 Canadian Online Publishing Awards for the best feature article in the academic category.

Counterintuitive conservation: Fire boosts aquatic crustaceans in U.S. savannas
- In an interesting twist, two kinds of rare American freshwater crustaceans have been found to thrive after prescribed burns in their habitats.
- Populations of vernal pool fairy shrimp in Oregon and several species of threatened crayfish on the Gulf Coast increased after the removal of invasive plants, woody shrubs and trees from their habitats using fire or mechanical means.
- Fairy shrimp populations were shown to increase more than fivefold following habitat treatments that featured fire, while speckled burrowing crayfish also responded positively following fires set to favor nesting of sandhill cranes (whose own population has soared since).
- Both areas are savanna ecosystems that have relied on frequent fires over millennia — whether naturally occurring or intentionally set by Indigenous peoples — to maintain the open habitats to which myriad organisms have adapted.

Indigenous women in Colombia protect rich Amazonian wetland from overfishing
- Dozens of Indigenous women in Colombia’s Amazon are monitoring, managing, raising awareness and restoring a wetland ecosystem impacted by overfishing.
- After partnering with environmental organizations to establish a fishing agreement in the area, they have witnessed the increase and recovery of fish species such as sardines, catfish and the pirarucu (Arapaima gigas).
- The wetland area of Lake Tarapoto, located in the department of Amazonas in southern Colombia, provides a habitat for numerous aquatic animals and supports the livelihoods of 22 Indigenous communities.

Scientists and fishers team up to protect Bolivian river dolphin
- Hunting, fishing, pollution and degradation and loss of habitat are the main threats facing the Bolivian river dolphin, a species of river dolphin that is found in 10 protected areas in the country.
- For almost three decades, scientists have involved local commercial fishers in an effort to document and monitor the landlocked country’s sole cetacean.
- A team of reporters joined them in sailing 450 kilometers (280 miles) upriver during the most recent population census.

Drying wetlands and drought threaten water supplies in Kenya’s Kiambu County
- Prolonged drought in Kenya has caused a water crisis, threatening local livelihoods and biodiversity; one of the badly affected areas is Kiambu County, a region normally known for its high agricultural productivity.
- Human activities such as dumping, encroachment and overgrazing coupled with dire effects of climate change exacerbate the degradation of wetlands, worsening the water crisis.
- Scientists say that conservation efforts must center around local communities to ensure the restoration of natural resources and combat the impacts of climate change.

Robust river governance key to restoring Mekong River vitality in face of dams
- Billions of cubic meters of Mekong River water are now harnessed behind dams in the interests of power generation, severely affecting crucial physical and biological processes that sustain the river’s capacity to support life.
- As the pace of hydropower development continues to pick up across the river basin, cracks in the region’s dated and limited river governance systems are increasingly exposed.
- Major challenges include the lack of formal, legally binding regulations that govern development projects with transboundary impacts, and a legacy of poor engagement with riverside communities who stand to lose the most due to the effects of dams.
- Experts say that open and honest dialogue between dam developers and operators is needed to restore the river’s natural seasonal flow and ensure the river’s vitality and capacity to support biodiversity and natural resources is sustained.

As hydropower dams quell the Mekong’s life force, what are the costs?
- The Mekong River is one of Asia’s longest and most influential waterways, sustaining extraordinary species and biodiverse ecosystems and providing nutrition for millions via its fertile floodplains and unparalleled fisheries.
- But over the past few decades, the construction of hydropower dams has undermined the river’s capacity to support life: more than 160 dams operate throughout the Mekong Basin, including 13 on the river’s mainstream, with hundreds more either planned or under construction.
- Besides severing fish migration routes and natural sediment transport throughout the river system, the dams affect the river’s natural seasonal ebb and flow, an ancient rhythm alongside which ecosystems have evolved.
- Communities, scientists and decision-makers now face unprecedented challenges as fish catches dwindle, riverbanks erode, ecosystems collapse and the delta inexorably sinks.

Loss of wetlands threatens South Sumatra’s rich fish-preserving tradition
- Rural communities in South Sumatra, an Indonesian province that’s two-fifths wetlands, have long relied on catching freshwater fish as a source of livelihood.
- The region is renowned for its variety of preserved fish products, which are sold throughout Indonesia.
- However, the wetlands are disappearing at a rapid rate, filled in to make way for oil palm plantations and highways, and threatening the region’s long-running fish-preserving tradition.
- Today, most of the freshwater fish processed here comes from fish farms, and include exotic species not native to the region, which some say doesn’t taste as good as the traditional species.

Lost bird found: Dusky tetraka seen in Madagascar after 24-year absence
- The dusky tetraka, a small yellow songbird that had eluded ornithologists for 24 years, has been found again in the tropical forests of northeastern Madagascar.
- The bird was found at a lower elevation than expected, in thick underbrush near a river. The team plans to search for the dusky tetraka again during the breeding season to learn more about its ecology and biology.
- The dusky tetraka is listed as one of the top 10 most-wanted lost birds, an initiative that aims to locate bird species that have not been seen and recorded for a minimum of 10 years.
- More than 90% of the species found in Madagascar are endemic, with the island yielding at least 150 new-to-science species in the last 30 years.

Herders turn to fishing in the desert amid severe drought, putting pressure on fish population
- As Northern Kenya’s unabating drought continues, a growing wave of pastoralists are finding it challenging to keep their livestock alive and are switching to fishing in Lake Turkana, the world’s largest desert lake.
- However, environmentalists, fishing authorities, and some fishers worry that potential overfishing and increased pressures on fish populations will cause a collapse in fish stocks and the lake’s ecosystem.
- Authorities are also concerned about the rampant use of illegal fishing gear, such as thin mesh nets that catch undersized fish in shallow breeding zones, and an illegal tilapia smuggling network draining the lake by the tons.
- Though no studies have yet been done to assess fish populations, some environmentalists and fishers are calling for better enforcement of regulations to keep livelihoods afloat.

Bangladesh bans suckermouth catfish in light of threats to native fish species
- Considering its aggressive breeding nature and the threats the species poses to native fish populations, the Bangladesh government has recently banned suckermouth fish.
- The suckermouth catfish is mainly an aquarium species that was imported into Bangladesh in the 1980s as an ornamental fish and later introduced into water bodies that are home to the country’s main sources of native fish.
- However, in recent years, the number of suckerfish has increased manifold as local fish species have decreased.
- Earlier, in 2002, Bangladesh banned two other fish species: African catfish and piranhas.

For key Bangladesh wetland, bid for Ramsar status is no guarantee of protection
- Bangladesh has proposed designating a third Ramsar site in the country, but the current state of its two other important wetland ecosystems suggests such a designation won’t be of much protection.
- The Sundarbans, the world’s biggest mangrove forest, and Tanguar Haor, a freshwater swamp forest, have been severely degraded by deforestation, hunting of wildlife and fish, overexploitation of natural resources, and water pollution.
- Hakaluki Haor, the largest marsh wetland ecosystem in South Asia, which the government wants designated a Ramsar site, is already facing similar threats.
- “The problem is, the government does nothing after the recognition. They completely fail to take necessary measures, in the interest of vested quarters in the government,” says environmental lawyer Syeda Rizwana Hasan.

Peatland restoration in temperate nations could be carbon storage bonanza
- Much maligned and undervalued over the centuries, temperate peatlands have seen a lot damage in that time — drained for agriculture, planted with trees, mined for horticulture and fuel. But in an age of escalating climate change, people are now turning to restoration.
- As potent carbon sequesters, peatlands have only recently been given new attention, with active restoration taking place in many nations around the world. This story focuses on groundbreaking temperate peatland restoration efforts in the U.S. Southeast, Scotland and Canada.
- Every temperate peatland is different, making each restoration project unique, but the goal is almost always the same: restore the natural hydrology of the peatland so it can maximize carbon storage and native biodiversity, and improve its resilience in the face of climate change and increasingly common fires in a warming world.

Restore linked habitat to protect tropical amphibians from disease: Study
- Amphibians across the tropics are facing a global decline, with disease caused by the chytrid fungus Batrachochytrium dendrobatidis (Bd) playing an especially significant role in losses.
- According to recent research, “habitat split” — when different types of habitat, such as terrestrial and freshwater areas, become separated — could play a role in exacerbating disease, potentially altering species’ microbiomes and weakening amphibian resistance.
- According to the study, an amphibian’s journey through altered habitat to complete its life cycle can change the composition of its microbiome (the bacterial makeup of the skin); induce chronic stress; and reduce immune gene diversity — all of which can impact disease resistance.
- Though further studies are needed, this research may offer another persuasive reason to actively restore and reconnect habitats, helping to “prime” amphibian immune systems against disease. There is also a possibility that habitat split findings among amphibians could extend to other families of animals.

Banned but abundant, gillnets pose main threat to Bangladesh’s river dolphins
- Bangladesh is home to around 2,000 Ganga River dolphins and 6,000 Irrawaddy dolphins, found mostly in the Sundarbans, the world’s largest mangrove forest.
- Both species, considered threatened on the IUCN Red List, run a high risk of entanglement in the gillnets used by local fishers.
- Gillnets are banned in Bangladesh, but remain popular among local fishers, with the government unable to crack down on their use.
- To conserve the freshwater dolphins, the government has embarked on a 10-year action plan that includes declaring more areas as dolphin sanctuaries and raising awareness among fishers.

Venezuela’s oil spill crisis reached new heights in 2022: report
- There were 86 oil spills and gas leaks in Venezuela last year, according to a report published by the Observatory of Political Ecology of Venezuela.
- The states of Zulia and Falcón had the most spills, with 31 and 29, respectfully. In both areas, the spills threatened marine ecosystems in the Caribbean and Lake Maracaibo.
- The spills are a result of aging infrastructure and a lack of regulations needed to maintain the country’s massive oil industry, the report said.

Series of small dams pose big cumulative risk to Amazon’s fish and people
- Small hydropower plants and small-scale fish farming in the Brazilian Amazon basin are often thought to cause negligible environmental harm, yet a new study reveals their cumulative damage is greatly underestimated and can be more impactful than large dams.
- Dwindling fish populations caused by the construction of thousands of small dams has impacted the livelihoods of millions of Indigenous and riverside people who depend on fishing for food, income and culture.
- Small hydropower plants and aquaculture farming are encouraged through economic incentives, simple licensing procedures, and loose requirements for environmental impact assessments before construction.
- More than 350 dam proposals in the Amazon basin are under consideration and 98 medium-sized dams will be prioritized in Brazil as of next year, ensuring the construction of hydropower plants will continue.

Top mangrove news of 2022
- Mangroves are unique forests adapted to live along the coasts in mostly tropical and subtropical areas of the world.
- Mangroves are in danger as they are cleared to make room for farms, mines, and other human developments.
- Mangroves provide a bevy of important ecosystem services such as flood and erosion control and greenhouse gas storage, and they provide habitat for many species.
- Below are some of the most notable mangrove news items of 2022.

Unsustainable fishing to be banned in Irrawaddy dolphin’s Bornean sanctuary
- Indonesia’s fisheries ministry is working with a conservation NGO to draw up plans prohibiting fishing gear considered dangerous to critically endangered Irrawaddy dolphins in the Mahakam River in Borneo.
- The prohibition will apply to a stretch of the Mahakam that was designated a conservation area earlier this year and that’s home to 90% of the estimated 80 Irrawaddy dolphins in the Mahakam.
- Among the practices they’re seeking to ban are fishing with a type of gill net known as rengge, electrofishing, poison fishing, and fixed-net fishing known as sawaran and kombongan.
- Local fishers are said to be supportive of the plan: “They want to continue fisheries but they also want to get rid of unsustainable fishing … because they care about the dolphins as well.”

Brazil’s Pantanal is at risk of collapse, scientists say
- Though the Pantanal is 93% privately owned, this vast Brazilian tropical wetland remains a stronghold for jaguars and untold other species, and connects animals with the Amazon, Cerrado and other biomes.
- A confluence of human activities in Brazil and worldwide — including deforestation and climate change — are heating and drying this watery landscape, threatening the entire ecosystem with drought, wildfires and habitat loss.
- Now, a plan to dredge and straighten the Paraguay River that feeds the Pantanal could serve as the death knell for this vast wetland ecosystem.
- There’s hope that president-elect Luiz Inácio Lula da Silva, who campaigned on an environmental platform, will initiate stewardship that stops Pantanal deforestation and the waterway project, helping curb greenhouse gas emissions.

Threatened cloud forests key to billions of dollars worth of hydropower: Report
- Payments for the provision of water by cloud forests for hydropower could produce income for countries and bolster the case for the forests’ protection, a new report reveals.
- These fog-laden forests occur on tropical mountains, with about 90% found in just 25 countries.
- Cloud forests are threatened by climate change, agricultural expansion, logging and charcoal production, and studies have shown that the quality and quantity of water that these forests generate is tied to keeping them healthy.

‘Europe’s rarest fish’ numbers spawn hopes for species’ survival
- The asprete, a rare freshwater fish found in Romania, was once considered extinct after dam construction destroyed much of its habitat.
- The fish’s existence was confirmed by surveys conducted in the last 50 years but only a few were thought to survive in Romania’s Vâlsan River. In 2020, an official estimate suggested only 7 to 10 individuals remained.
- However, a 2022 survey expedition found 58 specimens across a 15-kilometer (9.3-mile) stretch of the river, raising hopes that the species could be saved from extinction.
- Experts say conservation efforts, as well as more robust survey attempts, led to the higher population count.

‘They paid for it with misery’: Q&A with Chile dam critic Jose Marihuan Ancanao
- Jose Marihuan Ancanao, president of the Ayin Mapu La Peña community, spoke to Mongabay’s Maxwell Radwin about the impact of hydropower plants in parts of the Chilean Andes that are home to Indigenous people with a spiritual connection to rivers and the surrounding mountains.
- Marihuan was relocated in the early 2000s by a different hydropower plant and, although relocation isn’t a threat this time around, is witnessing the construction of another mega dam near his community.
- The 90-megawatt Rucalhue power plant has resulted in the felling of nationally protected trees sacred to the Pehuenche and, once finished, would flood some ancestral land.

Mercury rising: Why Bolivia remains South America’s hub for the toxic trade
- Bolivia is one of the few countries in South America yet to ban the import of the toxic chemical mercury, facilitating its use in illegal mining throughout the region.
- An October U.N. report highlighted Bolivia’s high rate of mercury imports and the need to regulate the distribution and use of the chemical, which has polluted entire watersheds in the country and poisoned animals and Indigenous communities alike.
- Some Bolivian government officials have called for a ban on the import of mercury and better controls on mining operations, many of which run without permits or government oversight.

Avocado farming is threatening Colombia’s natural water factory
- To satisfy the world’s ever-increasing appetite for the popular fruit, Colombia is risking the páramo, one of its key ecosystems.
- These rare environments provide fresh water to tens of millions of people — the majority of the Colombian population.
- The country is now second to Mexico as the world’s top avocado producer, with a significant uptick in production in the last year, resulting in socioeconomic and environmental impacts for communities downstream.

East Africa should promote renewable energy, not oil pipelines (commentary)
- The East African Crude Oil Pipeline (EACOP) is a planned 1,443 km pipeline that is expected to be built between oil fields in western Uganda to the port of Tanga in Tanzania.
- Despite likely negative effects on wildlife, forests, rivers, and the climate, EACOP proponents say the project will benefit the regions’ people: do these arguments hold water? A new op-ed says no.
- “Traditionally, and as recognized by President Museveni, Africans have lived in harmony with nature. They should continue to do so by championing renewable energy over risky projects such as the EACOP,” the writer argues.
- This post is a commentary. The views expressed are those of the author, not necessarily Mongabay.

For water quality, even a sliver of riverbank forest is better than none
- Costa Rica currently has laws in place to protect riparian zones along waterways, but they are unevenly enforced.
- Implementing these laws, even at the bare minimum of maintaining a 10-meter (33-foot) strip of riverbank vegetation, could lead to benefits for water quality and people, according to a new modeling study.
- The study shows that a small increase in forest cover around waterways can reduce nutrient and sediment runoff, especially on steeper lands and near farms and cities.
- Increases in water quality from riparian zones would improve drinking water for vulnerable populations in Costa Rica.

Habitat loss, climate change threaten Bangladesh’s native freshwater fishes with extinction
- There were at one time more than 300 native freshwater fish species in Bangladesh, but many have disappeared while others are on the verge of extinction due to habitat loss, overfishing, pollution and climate change.
- Open rivers and other bodies of water in Bangladesh are dwindling fast due to development interventions, unplanned urbanization, encroachment and siltation, which are destroying the habitats of indigenous fish species.
- According to the International Union for Conservation of Nature (IUCN), the statuses of 64 freshwater fish species in Bangladesh range from vulnerable to critically endangered while 30 have become extinct in the wild during the last 30 to 40 years.
- Bangladesh Fisheries Research Institute (BFRI) has so far revived 37 out of 67 species that disappeared from the wild through captive breeding programs and conservation efforts.

Podcast: Science that saves free-flowing rivers & rich biodiversity
- Rapid biological surveys are a well-known way to establish the richness of an ecosystem and advocate for its conservation.
- A corps of scientists and conservationists has used such surveys to prove that the rush to build thousands of new hydroelectric dams in southern Europe threatens to drown a rich heritage, with impressive results.
- A proposal to dam one of the last free-flowing rivers in Europe was halted on the basis of one such survey, in addition to much conventional activism, and the group has since turned its focus to other threatened rivers in the region.
- “It might be the highest density of trout species on Earth,” podcast guest Ulrich Eichelmann says of these rivers, which also host a wealth of bugs, bats, birds and beauty — plus a deep cultural heritage.

The mine leak was bad. The DRC and Angola’s response are no better, report says
- In July 2021, an Angolan diamond mine leaked large amounts of polluted water into the Kasai River Basin which stretches across Angola and the Democratic Republic of Congo.
- Twelve people were killed, a further 4,400 fell ill and an estimated 1 million more were affected by the polluted water.
- Fourteen months later, the DRC government has not released full results of tests conducted on the rivers, but a ban on drinking the water from the Kasai and Tshikapa rivers remains in place.
- An independent report published in September 2022 has found that the leak killed off much of the rivers’ aquatic life, with severe and ongoing impacts on river-dependent communities.

Catfished: New species described from DRC after mistaken identity
- Scientists recently identified a new species of air-breathing catfish, Clarias monsembulai, in the Democratic Republic of Congo’s Salonga National Park — the first new species of catfish in the Clarias genus to be described in 42 years.
- It was named after Congolese researcher Raoul Monsembula, who collected samples of the species in 2006 and 2010 without realizing at the time that the fish was unknown to science.
- Experts say that species discoveries are very common in Salonga National Park due to the region’s rich biodiversity as well as the limited amount of research being done there.
- However, the area also faces numerous threats, including poaching and the possibility of fossil fuel extraction.

Nepal’s mugger crocs face ‘senseless’ turf war over dwindling fish resources
- The decline in fish stocks in Nepal’s Koshi River threatens the mugger crocodile, a species already under pressure from historical poaching and habitat loss.
- A new study shows the crocodiles are increasingly encroaching into community-run fish farms in the buffer zone of the Koshi Tappu Wildlife Reserve in search of food, raising the risk of conflict with humans.
- At the same time, they face competition from gharials, a predominantly pescatarian crocodile that’s being introduced back into the Koshi as part of a government-run conservation program.
- “Making a vulnerable species compete with its critically endangered cousin doesn’t make sense,” says one of the authors of the study.

Humans are dosing Earth’s waterways with medicines. It isn’t healthy.
- Medicines, chemical formulations that alleviate much human suffering, can also be significant pollutants, with active ingredients often excreted from the human body and entering waterways. However, the intensity of this contamination and of its impacts has not been well researched.
- A study published in June analyzed samples from 1,000 sites along waterways in more than 100 nations, looking for 61 active pharmaceutical ingredients (APIs). Their results suggest that concentrations of at least one API breached safe levels for aquatic life at nearly 40% of sites tested globally.
- Some pharmaceuticals are endocrine disruptors (EDCs), which mimic hormones and interfere harmfully with the endocrine system in various organisms, while other drugs are linked to antimicrobial resistance (AMR), considered one of the biggest threats to human health and well-being today.
- Despite growing awareness among scientists, there is no systematic reporting of waterway pollution by medicines, or impacts on ecological health. Currently, many human-excreted pharmaceuticals enter directly into waterways, or pass through existing wastewater treatment facilities. Fixing the problem will be very expensive.

In the Mekong Basin, an ‘unnecessary’ dam poses an outsized threat
- A dam being built in Laos near the border with Cambodia imperils downstream communities and the Mekong ecosystem as a whole, experts and affected community members say.
- The Sekong A dam will close off the Sekong River by the end of this year, restricting its water flow, blocking vital sediment from reaching the Mekong Delta in Vietnam, and cutting off migration routes for a range of fish species.
- Experts say the energy to be generated by the dam — 86 megawatts — doesn’t justify the negative impacts, calling it “an absolutely unnecessary project.”
- This story was supported by the Pulitzer Center’s Rainforest Investigations Network where Gerald Flynn is a fellow.

Human pressures strain Lake Tanganyika’s biodiversity and water quality
- As fishing pressure has increased on Lake Tanganyika, its level has also been rising, inundating shoreline communities.
- Sedimentation as a result of farming, infrastructure projects and deforestation is causing the water level to rise and the lake to expand.
- This has not led to an increase in fish populations, however, and what little data exist suggest that the lake’s overall biodiversity–probably including hippos and Nile crocodiles–is declining.
- An EU-funded plan to coordinate management of the lake by all countries that share it aims to address some of the knowledge gaps, but is itself hobbled by budget constraints.

Wildlife lover and artist records 5 decades of change on iconic U.K. river
- As a youngster in the 1960s, Janet Marsh spent hours beside England’s Itchen River while her father fished, closely observing the teeming life of the small English stream. Her love of wildlife there, and desire to draw what she saw, helped inspire her to become an accomplished artist.
- In 1979, she published her “nature diary,” profiling the life of her beloved river with exquisite watercolor illustrations along with astute observations. She also added her voice and images to a campaign protesting the extension of a motorway over the river. A selection of her Itchen illustrations are featured in this story.
- Decades later, Marsh revisits the river with Mongabay, noting that the motorway itself, though noisy, hasn’t caused widespread damage, with wildlife proving resilient. Far more harmful has been steady human development, with pollution from fish farms, septic tanks and cropland runoff all gradually killing the river.
- The Itchen and other rivers like it have been called England’s coral reefs due to their biodiversity. They are like small watersheds the world over that get little attention, but where the web of life is unraveling due to human-induced change. In such unsung places, local activists often step up to document and preserve nature.

Mining the Mekong: Land and livelihoods lost to Cambodia’s thirst for sand
- Sand mining by politically connected companies has been blamed for the collapse of riverbanks along the Mekong and Bassac rivers in Cambodia.
- Affected residents say they’ve lost their homes and their livelihoods, based on fishing and tourism, as a result of the mining, but see no positive changes or hope for justice.
- The government, however, denies that the dredging is responsible for the erosion, with a senior official saying that it actually helps stabilize the riverbanks — a claim that scientists say is “a myth.”
- This story was supported by the Pulitzer Center’s Rainforest Investigations Network where Gerald Flynn is a fellow.

Gharials, most distinctive of crocs, are most in need of protection, study shows
- Slender-snouted gharials are among the most distinctive of the world’s crocodilians, and thus the most in need of conservation action, a new study suggests.
- The study authors scored all 28 existing crocodilian species from around the world — from the Chinese alligator to the Orinoco crocodile — on their functional distinctiveness and threat ranking to arrive at a metric.
- Known as EcoDGE (ecologically distinct and globally endangered), the metric suggests a third to a half of crocodilian functional diversity could be lost over the next century.
- Conservation scientists say the study highlights a new perspective of identifying the crocodilian species most in need of urgent conservation action.

In Brazil’s Pantanal, early flames signal a ‘new normal’
- Fresh fires are engulfing swaths of the Pantanal, including Pantanal do Rio Negro State Park, a protected reserve with a rich biodiversity of plant and animal species. The flames have affected at least 10,062 hectares of the 78,302-hectare park.
- These fires follow devastating blazes in 2020 and 2021, which consumed huge parts of the Pantanal, the world’s largest tropical wetlands which straddles the borders of Brazil, Paraguay and Bolivia.
- Fire brigades fear more fires may be in store for the Pantanal, as ranchers and farmers continue to use fire to clear agricultural plots of land, despite a ban prohibiting this practice during the region’s dry season.
- Environmentalists warn a changing climate is having a devastating impact on the Pantanal, fueling fires that are more frequent.

Deforestation intensifies in northern Malaysia’s most important water catchment
- The Ulu Muda rainforest is one of the last large, continuous tracts of forest in the Malay Peninsula, providing vital habitat for countless species as well as water for millions of people in northern Malaysia.
- Satellite data indicate deforestation activities are intensifying in the greater Ulu Muda landscape, including in protected areas such as Ulu Muda Forest Reserve.
- Sources say the forest loss is likely due to legal logging.
- Conservationists worry that the loss of Ulu Muda rainforest will have detrimental impacts on the region’s biodiversity and water security, as well as contribute to global climate change.

Rains quell fire risk around Cambodia’s Tonle Sap, but the future looks fiery
- Cambodia has received an unusually high volume of rain since December, generally the start of the dry season, which has led to a relative lull in fire activity.
- According to NASA satellite data, there were only two high-confidence fire alerts reported in the forested area around Tonle Sap, Cambodia’s largest lake, between April 1 and July 1 this year, compared to 45 such alerts recorded during the same period in 2021.
- This year’s heavy rain, while a welcome respite, isn’t expected to last as temperatures rise and droughts increase in frequency due to climate change.
- Tonle Sap’s water levels have already been dropping for years, according to authorities; to mitigate future threats, the Department of Fisheries Conservation is rolling out provincial-level plans to respond to forest fires in the lake’s drying floodplain.

First-of-its-kind freshwater mangroves discovered in Brazil’s Amazon Delta
- Researchers on an expedition in the Amazon River Delta have found mangroves growing in freshwater — a phenomenon never before documented in deltas or coastal mangroves anywhere else in the world.
- The mangroves, overlooked by previous satellite mapping efforts, increase the known area of mangroves in the region by 20%, or an additional 180 square kilometers (70 square miles).
- Mangroves are a more effective carbon sink than other types of tropical forest, with more than 8% of all carbon stocks worldwide held in Brazil’s mangroves.
- Despite their many ecosystem services, mangroves are not well protected or funded in Brazil.

Overexploitation threatens Amazon fisheries with collapse, study warns
- Fishers in the Amazon Basin are catching smaller species of fish than before, indicating overexploitation of the region’s aquatic biodiversity, a new study says.
- The study looked at fish catch data from six river ports (three each in Peru and Brazil) to conclude that “fisheries are losing their resilience and progressing towards possible collapse.”
- Researchers say freshwater fish stocks in the Amazon have never been a priority for conservation or monitoring, which has allowed this decline to occur over the course of decades.
- The loss of larger fish deprives communities for whom fish is a dietary staple of important nutrients, as well as impoverishes the wider river ecosystem.

Small mammals stranded by hydropower dams die out surprisingly fast: Study
- Forest fragmentation has long been known to impact species survival: small, isolated populations with access to limited resources are at greater risk of extinction.
- In 1987, the Chiew Larn reservoir was formed in southern Thailand as part of a hydropower scheme, creating more than 100 forested islands inhabited by newly stranded animals.
- A new study documents the alarmingly quick collapse of the reservoir archipelago’s small mammal communities, resulting in the loss of nearly every species and dominance by one invasive rodent.
- Tropical biologists warn the study reflects the global trend of fragmentation in tropical forests, which is ravaging both species diversity and ecosystem resilience.

In restoring polluted rivers, Indonesia looks at restocking endemic fish
- Two reported mudflows overflowed the Serayu River on the Indonesian island of Java within the space of a week earlier this year, mucking its waters and killing off fish.
- The incidents have raised calls from conservationists and fishers for restoration and fish restocking efforts in the river.
- Fish restocking has been carried out for several decades in Indonesian rivers, mainly as an effort to increase fisheries productivity and fish populations in inland waters such as rivers, reservoirs and lakes.
- But experts say these restocking efforts often emphasize ceremony at the expense of measures to ensure success, such as post-monitoring assessment.

Raise-and-release program keeping Nepal’s gharials alive can be improved, study says
- A new study has recommended ways to improve the success rate of a program that releases captive-raised gharial crocodiles into the wild in Nepal.
- The study looked at the growth of gharials released under the program going back 10 years, and identified the first two years in the wild as the most critical for the animals’ chances at surviving.
- It recommended timing the releases with periods when fish are more abundant in rivers, allowing the crocodiles to pack on weight while minimizing their energy expenditure.
- The study authors also call for addressing threats to the critically endangered species from dams, riverbed mining and fishing, and for closer cross-border conservation efforts between Nepal and India, where some of the released gharials have ended up.

Giant stingray caught in Cambodia is world’s largest freshwater fish
- The largest freshwater fish ever recorded was captured last week in Cambodia’s stretch of the Mekong River: a giant freshwater stingray measuring 4 meters (13 feet) from snout to tail and weighing 300 kilograms (661 pounds).
- The discovery occurred in a stretch of the Mekong known for its diversity of freshwater habitats that support crucial fish-spawning grounds and migration corridors and provide refuges for other mega fish species and threatened species, such as Irrawaddy dolphins and giant softshell turtles.
- Local fishers collaborating with researchers to document the area’s underwater life alerted a monitoring team who measured the ray, fitted it with an acoustic tag to learn more about its behavior, and facilitated its release back into the wild.
- Experts say the find emphasizes what’s at stake in the Mekong, a river that’s facing a slew of development threats, including major hydropower dams that have altered the river’s natural flow. “It is a signal to us to protect our rivers and lakes,” they say.

First gharial hatchlings spotted in nearly two decades in Nepal’s Karnali River
- Twenty-eight gharial hatchlings have been spotted in a tributary of Nepal’s Karnali River, the first sign of successful nesting in this waterway in at least 16 years.
- The discovery by villagers living near Bardiya National Park came on June 15, two days before World Crocodile Day, and indicates the critically endangered species is on the road to recovery.
- Nepal is home to about 200 breeding gharials, and since 1978 has carried out conservation and breeding programs for the species.

In the Mekong’s murky depths, giants abound, new expedition finds
- An underwater expedition into the deepest pools in the Mekong River has confirmed the presence of giant freshwater fish, fish migration routes, and high volumes of discarded fishing gear and plastic waste.
- The international team of underwater explorers, local fish biologists and fishermen used deep-sea camera technology to document the ecological value of the unique area in northeastern Cambodia, which is characterized by 80-meter-deep (260-foot) pools, flooded forests and braided river channels.
- But just as researchers reveal the value of its biodiversity, food security and fisheries livelihoods, the area faces a new threat: earlier this year, feasibility surveys began for a hydropower dam planned for directly upstream of the deep-pool habitats.
- According to the expedition team, construction of the Stung Treng dam would have “devastating ecological effects and could seriously threaten local food security in an area of the world already impacted by changing climate.”

Boom and bust on Lake Victoria: Q&A with author Mark Weston
- In a new book, British author Mark Weston examines an environmental crisis on East Africa’s Lake Victoria that’s been a century in the making and stems from the introduction of the non-native Nile perch to the lake in the 1950s.
- Weston lived on Ukerewe, the lake’s largest island, for two years, and relates the knock-on legacy of the fish’s introduction through the experiences of the people he met there.
- The boom and bust of the fishery brought about a surging population, deforestation, declining land fertility, and increased pollution in the lake.
- With Nile perch catches down precipitously and little else to sustain the economy of Ukerewe, residents struggle through poverty, lack of opportunity and a trickling exodus from the once-prosperous community, in search of a better life for themselves and their families.

Freshwater planetary boundary “considerably” transgressed: New research
- Earth’s operating systems have stayed in relative balance for thousands of years, allowing the flourishing of civilization. However, humanity’s actions have resulted in the transgressing of multiple planetary boundaries, resulting in destabilization of those vital operating systems.
- This week scientists announced that humanity has transgressed the freshwater planetary boundary. Other boundaries already crossed are climate change, biosphere integrity, biogeochemical cycles (nitrogen and phosphorous pollution), land-system change, and novel entities (pollution by synthetic substances).
- In the past, the freshwater boundary was defined only by “blue water” — a measure of humanity’s use of lakes, rivers and groundwater. But scientists have now extended that definition to include “green water” — rainfall, evaporation and soil moisture.
- Scientists say soil moisture conditions are changing from boreal forests to the tropics, with abnormally dry and wet soils now common, risking biome changes. The Amazon, for example, is becoming far dryer, which could result in it reaching a rainforest-to-savanna tipping point, releasing large amounts of stored carbon.

The world’s dams: Doing major harm but a manageable problem?
- Dam construction is one of the oldest, most preferred tools to manage freshwater for various uses. The practice reached a peak internationally in the 1960s and ’70s, but in recent years dam construction has faced increasing global criticism as the hefty environmental price paid for their benefits piles up.
- The flows of most major waterways have been impacted by dams globally. Only 37% of rivers longer than 1,000 km (620 mi) remain free-flowing, and just 23% flow uninterrupted to the sea. Natural flows will be altered for 93% of river volume worldwide by 2030, if all planned and ongoing hydropower construction goes ahead.
- This global fragmentation of rivers has led to severe impacts. Dams have contributed to an 84% average decline in freshwater wildlife population sizes since 1970. More than a quarter of Earth’s land-to-ocean sediment flux is trapped behind dams. Dams also impact Earth’s climate in complex ways via modification of the carbon cycle.
- But dams are needed for energy, agriculture and drinking water, and are an inevitable part of our future. Lessons on how to balance their benefits against the environmental harm they do are already available to us: removing some existing dams, for example, and not building others.

GM fish engineered to glow in the dark are found in Brazil creeks
- A recent study shows that genetically modified zebrafish, known as GloFish, have been found and are breeding in creeks in Brazil’s Atlantic Forest.
- GloFish, which are genetically engineered for fluorescence, are advertised for sale online in Brazil, even though they’ve been banned there since 2017.
- Brazilian biologists have called for measures to prevent these fish from escaping fish farms and entering into local bodies of water, where they compete with native species for food.
- But a U.S biologist whose own research showed that GloFish fail to compete reproductively against wild-type zebrafish says this new paper is “almost a study about nothing” and was published only because it was “sensational.”

Cambodian project aims to revive flagging fish populations in Tonle Sap Lake
- Struggling freshwater fish populations in the Mekong River catchment received a boost earlier this month when a team of scientists and fisheries specialists released 1,500 captive-reared juvenile fish into Tonle Sap Lake in Cambodia.
- Experts say the release is the first step in rejuvenating the Mekong’s depleted fish populations and fisheries, which have been suffering in recent years due to overfishing, drought, habitat destruction, and the impacts of upstream dams on the Mekong River’s natural flow.
- The fish, including critically endangered Mekong giant catfish and giant barb, and endangered striped river catfish, were released into a series of fish sanctuaries and community conservation areas that protect crucial fish nursery habitat in Tonle Sap Lake, the world’s most productive inland fishery.
- Long-term survival of the Mekong’s threatened fish species will also depend on protection of migration corridors and upstream spawning grounds, and on maintenance of free-flowing and connected watercourses, say experts.

Pharmaceutical water pollution detected deep in the Brazilian Amazon
- Major rivers in the Amazon Basin of Brazil are contaminated with a wide range of pharmaceuticals as well as with sewage and wastewater, largely coming from urban centers in the region, according to recent research.
- Water samples taken along the Amazon, Negro, Tapajós and Tocantins rivers, and small urban tributaries that pass through the region’s cities, including Manaus, Santarém, Belém and Macapá contained 40 pharmaceuticals out of 43 in concentrations that have the potential to affect 50-80% of the local aquatic species.
- Experts explain that a major cause of freshwater contamination is the Amazon Basin’s rapidly growing population along with the government’s failure to provide adequate sanitation infrastructure — even though that has long been promised. Most of the region’s sewage is untreated, a solvable problem if properly funded.

Indigenous communities in Ecuador struggle with the aftermath of another oil spill
- In January, Ecuador’s Heavy Crude Oil Pipeline ruptured, contaminating more than 20,000 square meters of the Cayambe Coca National Park.
- Sources say contaminated water reached dozens of Indigenous Kichwa communities in the provinces of Napo and Sucumbíos.
- Three pipelines ruptured in the same area in April 2020, spilling more than 15,000 barrels of oil into the Coca River and affecting more than 27,000 members of downstream Indigenous communities.
- This story is a collaboration between Mongabay Latam and Ecuador’s La Barra Espaciadora.

Greek conservationists collaborate to protect endemic species in face of climate change
- Across Greece, conservation NGOs are working in close collaboration to study and save numerous endemic species found nowhere else.
- Often working in areas famed for Greek mythology like Mount Olympus and Mount Oiti, the plants and animals now need what seems like divine intervention to survive the ravages brought by climate change.
- Why so many endemic species? Greece has “an amazing diversity of climates and also soils. This creates an amazing diversity of life,” one conservationist tells Mongabay.

Colombian palm oil company under investigation for polluting rivers
- Oro Rojo began extracting palm oil in 2013 and was granted three environmental permits by environmental authority Corporación Autónoma de Santander (CAS), two of which are currently under investigation.
- Complaints have been filed alleging Oro Rojo discharged waste into nearby waterways.
- According CAS, the company has also been fined for violations relating to air pollution.

Threatened wetlands in Paraguay’s Lake Ypacaraí raise legal questions
- Wetlands surrounding the protected Lake Ypacaraí in Paraguay are being filled in to allow for the construction of housing and tourism projects.
- In addition to providing habitats for countless species of flora and fauna, the wetlands act as a filter for freshwater and help control flooding and erosion.
- The projects were approved by the Ministry of Environment, sparking outcry from congressmen who want to know if protected area laws are being ignored in favor of urban development.

Indigenous knowledge ‘gives us a much richer picture’: Q&A with Māori researcher Ocean Mercier
- The Māori, the Indigenous people of Aotearoa New Zealand, have extensive knowledge about oceans and marine environments, which has not always been valued or recognized.
- In recent decades, Māori researchers and knowledge holders have elevated the position of mātauranga (Māori traditional knowledge) about oceans in academic and community contexts.
- Ocean Mercier is an Indigenous researcher who works at the interface of mātauranga and Western science, on issues such as marine and freshwater conservation and management.
- She recently spoke with Mongabay about the benefits, challenges and “crunchy bits” of working across knowledge systems in this way.

Caffeine: Emerging contaminant of global rivers and coastal waters
- Caffeine is the most consumed psychostimulant in the world, and a regular part of many daily lives, whether contained in coffee, chocolate, energy drinks, or pharmaceuticals.
- Partially excreted in urine, it is now ubiquitous in rivers and coastal waters. So much so that its detection is used to trace wastewater and sewage pollution. A new study found it to be in more than 50% of 1,052 sampling sites on 258 rivers around the globe. Another new study enumerates caffeine harm in coastal and marine environments.
- This continual flow of caffeine into aquatic ecosystems is causing concern among scientists due to its already identified impacts on a wide range of aquatic life including microalgae, corals, bivalves, sponges, marine worms, and ﬁsh. Most environmental impacts — especially wider effects within ecosystems — have not been studied.
- Soaring global use of products containing caffeine means the problem will worsen with time. Untreated sewage is a major source. And while some sewage treatment facilities can remove caffeine, many currently can’t. Far more study is needed to determine the full scope and biological impacts of the problem.

Polluting with impunity: Palm oil companies flout regulations in Ecuador
- Community residents and researchers alike decry what they say is dangerous pollution leaching into soil and waterways from oil palm plantations and palm oil extraction mills in Ecuador.
- In July 2020, Ecuador’s government passed a law to strengthen and develop the production, commercialization, extraction, export and industrialization of palm oil and its derivatives.
- The law also prohibits oil palm plantations from being established within zones where communities’ water sources are located, and requires the existence of native vegetation buffers between plantations and water bodies.
- But critics say the regulatory portion of the law has been largely toothless and that the government has turned a blind eye to the social and environmental costs of the country’s rapid plantation expansion.

Community in Ecuador punished for trying to stop alleged palm oil pollution
- A legal loophole allowed palm oil companies in Ecuador to establish plantations on ancestral land that belongs to small communities.
- Community residents say that agricultural chemicals and waste from plantations and palm oil processing mills is polluting the water sources on which they depend.
- In an effort to stop the contamination of their water and the degradation of their land, residents of the community of Barranquilla spent three months occupying the access road to plantations surrounding their village in 2020.
- In retaliation, the company that owns and operates the plantations, Energy & Palma, sued four members of the community for lost profits; in Sep. 2021, courts ruled in the company’s favor and ordered the four to pay $151,000 to the company.

Innovative sewage solutions: Tackling the global human waste problem
- The scale of the world’s human waste problem is vast, impacting human health, coastal and terrestrial ecosystems, and even climate change. Solving the problem requires working with communities to develop solutions that suit them, providing access to adequate sanitation and adapting aging sewage systems to a rapidly changing world.
- Decentralized and nature-based solutions are considered key to cleaning up urban wastewater issues and reducing pressure on, or providing affordable and effective alternatives to, centralized sewage systems.
- Seeing sewage and wastewater — which both contain valuable nutrients and freshwater — as a resource rather than as pollutants, is vital to achieving a sustainable “circular economy.” Technology alone can only get us so far, say experts. If society is to fully embrace the suite of solutions required, a sweeping mindset change will be needed.

The thick of it: Delving into the neglected global impacts of human waste
- Though little talked about, our species has a monumental problem disposing of its human waste. A recent modeling study finds that wastewater adds around 6.2 million tons of nitrogen to coastal waters worldwide per year, contributing significantly to harmful algal blooms, eutrophication and ocean dead zones.
- The study mapped 135,000 watersheds planetwide and found that just 25 of them account for almost half the nitrogen pollution contributed by human waste. Those 25 were pinpointed in both the developing world and developed world, and include the vast Mississippi River watershed in the United States.
- Human waste — including pharmaceuticals and even microplastics contained in feces and urine — is a major public health hazard, causing disease outbreaks, and putting biodiversity at risk. Sewage is impacting estuary fish nurseries, coral reefs, and seagrasses, a habitat that stores CO2, acting as a buffer against climate change.
- Waste is often perceived as mostly a developing world problem, but the developed world is as responsible — largely due to antiquated municipal sewage systems that combine rainwater and wastewater in the same pipes. As a result, intense precipitation events regularly flush raw sewage into waterways in the U.S., U.K. and EU.

Indonesia aims for sustainable fish farming with ‘aquaculture villages’
- Indonesia plans to have a network of 136 villages dedicated to aquaculture by the end of this year.
- The initiative is part of the government’s efforts to boost exports of its world-renowned aquaculture commodities, namely shrimp, lobster, crab and seaweed.
- Experts have welcomed the plan, but say it must be supported by sound environmental planning, particularly avoiding the clearing of mangrove forests and ensuring proper waste management.
- Indonesia is one of the top exporters of farmed seafood, but fish farming in the country has long come at the expense of carbon-rich mangrove forests and other important coastal ecosystems.

China’s building spree in Nepal casts shadow over Himalayan ecosystem
- China’s role in Nepal has intensified in the period since the 2015 earthquake, mostly in the form of investments in rebuilding projects. In 2019 alone, China initiated a series of projects, including factories and hydropower plants, worth $2.4 billion in Nepal.
- Many of the infrastructure projects run through sensitive environments, including national parks, and the construction of hydropower plants has been criticized by environmental organizations and local communities for destroying river ecosystems.
- For example, work on the Rasuwagadhi hydroelectric project, part of China’s Belt and Road Initiative, resumed in 2016, despite protests from locals who blamed the dam for mass fish deaths.

As its glaciers melt, Nepal is forced into an adaptation not of its choosing
- Climate change is causing the glaciers in Nepal’s Himalayan region to melt at an alarming rate, threatening fragile ecosystems, vulnerable communities, and billions of people downstream who rely on the rivers fed by the ice pack.
- If global greenhouse gas emissions continue on a business-as-usual trajectory and average global temperatures rise by more than 4°C (7.2°F) by 2100, the Himalayan region could lose up to two-thirds of its glaciers, a study shows.
- For farming communities, this means water shortages, less feed for their livestock, and increased risks of natural disasters such as landslides and glacial lake flash floods.
- The Himalayas are, at present, heating up at rates up to 0.7°C (1.3°F) higher than the global average, and poor communities are already feeling the impacts.

Tigers, jaguars under threat from tropical hydropower projects: Study
- A new study reveals that more than one-fifth of the world’s tigers and one in 200 jaguars have been affected by habitat loss linked to hydropower projects.
- Land flooded for hydroelectric reservoirs has resulted in the substantial loss of habitat for both top predators, and future hydropower projects planned within the species’ ranges fail to consider the big cats’ long-term survival, the study says.
- Scientists struggle to track the fate of tigers and jaguars displaced by hydropower reservoirs, but their chances of survival are very low, according to the study’s authors.
- The researchers recommend that policymakers minimize the impacts of future hydropower projects by avoiding landscapes deemed high priority for conservation.

Newly released Cambodian activists honored among Front Line Defenders awardees
- In early November, six young activists associated with environmental advocacy group Mother Nature Cambodia were released from prison after spending up to 14 months behind bars.
- Rights groups are calling on the Cambodian government to drop all charges against the activists and to release 60 other political prisoners who remain incarcerated.
- Front Line Defenders, an international rights group, recently recognized Mother Nature Cambodia in its 2021 awards.
- The young activists say the award serves as a source of motivation for them to continue their work to expose corruption and environmental abuses, including illegal mining, deforestation and pollution.

Young forests can help heal tropical aquatic ecosystems: Study
- Microbial communities are important indicators of ecological degradation in the tropics, often reflecting levels of disturbance and contamination in rivers and streams.
- In an attempt to monitor the ecological condition of various streams in central Panama, researchers at the Smithsonian Tropical Research Institute (STRI) assessed the impact of various land usages, such as cattle pasture and secondary forest, on microbial diversity and community structure.
- In less than a decade, researchers say, reforested land allows bacterial communities to recover, highlighting the importance of reforestation for overall ecosystem recovery.

Stretch of Borneo’s Mahakam River eyed for protection to save Irrawaddy dolphins
- Conservationists in Indonesian Borneo are working to establish a protected area along the Mahakam River to save the remaining population of the nearly extinct Irrawaddy dolphin.
- The proposed conservation area is expected to alleviate the threats to the population of the freshwater dolphins, including river degradation and ship traffic.
- The latest population estimates suggest only around 80 of the endangered dolphins remain in the Mahakam.

Study chronicles dying of a lake in PNG with advent of oil & gas activities
- A new study finds warning signs of ecosystem collapse at Lake Kutubu in Papua New Guinea, a wetland of international significance.
- The warning signs come in the form of major shifts in algal composition and dung-inhabiting fungi in the lake sediment in the 1980s and 1990s, indicating a drop in water quality and coinciding with oil and gas extraction in the area.
- The lake used to have extensive beds of microalgae known as charophytes, which provided a breeding ground for endemic fish and crayfish, but these beds have since all but disappeared.
- The researchers have called for action such as monitoring of the lake’s algae and fish populations to save the lake from ecological collapse.

Inland mangroves reveal a tumultuous climatic past — and hint at our future
- A new study concludes that the presence of inland mangroves along a river in southern Mexico was the result of climate change-driven sea level rise during the Pleistocene Epoch, some 115,000 to 130,000 years ago.
- The researchers’ analysis of the genetic history of the mangrove trees suggests that they are closely related to trees found on the coastline, and sediments nearby are similar to those found in ocean environments.
- Publishing their work Oct. 12 in Proceedings of the National Academy of Sciences, the team notes that their research highlights the impacts of global climate change.

Nitrogen: The environmental crisis you haven’t heard of yet
- The creation of synthetic fertilizers in the early 20th century was a turning point in human history, enabling an increase in crop yields and causing a population boom.
- But the overuse of nitrogen and phosphorus from those fertilizers is causing an environmental crisis, as algae blooms and oceanic “dead zones” grow in scale and frequency.
- Of the nine “planetary boundaries” that scientists say we must not cross in order to sustain human life, the boundary associated with nitrogen and phosphorus waste has been far surpassed, putting Earth’s operating system at risk.
- Global policymakers are beginning to slowly recognize the scale of the problem, as climate change threatens to make it worse. Absent major reforms to agribusiness practices, scientists are aiming to convince the world to reduce waste.

Not just sea life: Migratory fish, birds and mammals also fall foul of plastic
- A new report from the U.N. Environment Programme and the Convention on the Conservation of Migratory Species of Wild Animals confirms that plastic pollution poses a major threat to land and freshwater migratory species.
- Mammals, birds and fish are affected through various means, including entanglement, ingestion of plastics, accumulation of microplastics in the food chain, and using plastics in nesting material.
- The report highlights that global capacity to manage plastic pollution is not keeping pace with projected growth in the plastics market.
- The authors call for measures that will ultimately drive change upstream to reduce the volume of plastics entering the marketplace.

New map identifies risks, and potential sanctuaries, for Brazil’s diving duck
- The Brazilian merganser, a duck that’s the mascot for the country’s waterways, is among the top 10 most threatened birds in the world, with only about 250 individuals left in the wild.
- As part of conservation efforts, scientists have recently published a map showing the critically endangered species’ distribution in its remaining habitat, as well as identifying suitable new areas where it could thrive.
- The map also highlights the threats to this bioindicator species that needs clear, pollutant-free water to survive; the main threat comes from the damming of rivers, which affects water flow and quality for the mergansers.
- The researchers found 36 small hydropower plants planned for areas close to sites where the species lives, potentially impacting 504 square kilometers (196 square miles), or 4.1% of the total area suitable for the duck’s habitat.

Dam builder denies responsibility as logjam chokes river in Malaysian Borneo
- Tons of wood debris has clogged up the Baleh and Rajang rivers in Sarawak, Malaysian Borneo.
- The logjam originated in the headwaters of the Baleh, where a hydroelectric dam is currently under construction and logging activity is being carried out nearby.
- The logjam originated in the headwaters of the Baleh, where a hydroelectric dam is currently under construction and logging activity is being carried out nearby.
- But the state-owned utility building dam denies responsibility, pointing to logging upstream.

For monitoring mammals, eDNA boasts ‘killer feature’ over other methods
- Mounting evidence suggests that the fast-developing tool of eDNA could be a game-changer for terrestrial mammal monitoring.
- A new study demonstrates that eDNA analysis of stream water can reveal the diversity of terrestrial mammals in a large landscape as effectively as camera trapping and for a fraction of the cost.
- Traditional mammal survey methods can be time-consuming, expensive and far from failsafe; eDNA is a reliable and comparatively inexpensive way for conservationists to gain a snapshot of an ecosystem’s mammal fauna, scientists say.
- It could also have a big impact on conservation, since eDNA data allows timely decisions on which species to prioritize and which areas to protect.

Scientists turn to eDNA to curtail the freshwater extinction crisis
- Freshwater ecosystems are understudied and underfunded, resulting in a lack of information on what species are at risk of extinction.
- The eBioAtlas program, a partnership between the IUCN and NatureMetrics, uses environmental DNA gathered from freshwater samples to figure out what freshwater ecosystems to conserve and what species to prioritize.
- So far, a pilot study in southeast Liberia has successfully picked up environmental DNA from nearly 170 species, including some that are critically endangered.
- The new data will provide up-to-date information for the IUCN Red List of Threatened Species and empower local communities to maintain ownership of their land and water resources.

Rights groups demand end to Cambodia’s persecution of green activists
- A court in Cambodia has charged three activists from the environmental NGO Mother Nature Cambodia after they documented waste dumping in a river near the Royal Palace.
- It’s the latest instance of authorities cracking down on environmental activists in the country, after three other Mother Nature Cambodia staff were convicted in May for planning a peaceful protest against the backfilling of a lake.
- Local and international rights groups have condemned the spate of arrests and called on the international and donor community to bring pressure to bear on the government.
- There’s already been some pushback, with the U.S. government ending its funding of a forest conservation program, and the U.S. ambassador calling on Cambodian authorities to “be responsive to its citizens, not to silence them.”

In Pennsylvania, agroforestry holds a key to cleaning up waterways and Chesapeake Bay
- Scientists and regulators in Pennsylvania are working with farmers to plant trees along streams in the state, in an effort to reduce the level of pollutants entering the water.
- To meet their target of planting 34,800 hectares (86,000 acres) of riparian buffers by 2025, they’re taking a bottom-up approach, starting at the local level.
- For farmers, this can be a profitable endeavor, allowing them to cultivate fruit trees and flowers for additional income.
- The riparian buffers represent another example of an agroforestry system that’s a win-win for ecological outcomes and community well-being and livelihoods.

Chirp, chuckle and growl: Neotropical river otters call out to communicate
- Researchers observed and recorded captive neotropical river otters in Brazil and published the first formal description of their vocal repertoire.
- Neotropical river otters make six sounds, characterized as chirp, squeak, chuckle, hah, growl, and scream, which are used in different social interactions.
- The neotropical otter is classified as near threatened by the IUCN; otters were heavily hunted for their pelts from the 1950s through the 1970s which led to local extinctions, and although they’re now protected, they still face threats from poaching, habitat destruction, water pollution and mining.
- Despite the limitations of recording in captivity, researchers say they hope that understanding more about otter vocalizations will help manage both captive and wild populations.

Outrage as Cambodian court convicts activists for inciting ‘social chaos’
- On May 5, the Phnom Penh Municipal Court convicted and sentenced five activists from the environmental group Mother Nature Cambodia: Long Kunthea, Phuon Keoraksmey, Thun Ratha, Chea Kunthin and Alejandro Gonzalez-Davidson.
- The activists have been convicted of intending to cause “social chaos” by planning a protest of the government-sanctioned destruction of Phnom Penh’s lakes, which are being filled in for development. The planned one-person march never actually took place.
- Kunthea and Keoraksmey were sentenced to 18 months in prison and Ratha received a 20-month sentence while Alejandro Gonzalez-Davidson and Chea Kunthin were sentenced in absentia; each activist was also fined $1,000.
- Observers are crying foul at the convictions and incarceration of the activists and say that the health and lives of Kunthea, Keoraksmey and Ratha – who have been incarcerated since their arrest in September – are at risk due to Cambodia’s crowded prisons and a recent surge in COVID-19 infection rates.

A year after Ecuador oil spill, Indigenous victims await justice, reparations
- Following an oil spill in the Ecuadoran Amazon that contaminated the Coca River last year, local Indigenous groups reliant on the river are still struggling to adapt to alternative livelihoods.
- At the same time, the land around the Coca River has become increasingly unstable due to an accelerated rate of soil erosion, raising concerns about the integrity of nearby infrastructure, including a hydropower dam.
- Indigenous groups led a march in the city of Puerto Francisco de Orellana on April 7, the anniversary of the spill, to protest a ruling rejecting their bid for reparations.

Rare captive-bred crocodiles develop new, ‘odd’ habits in Philippine wild
- Crocodile experts in the Philippines have discovered new habits among the critically endangered Philippine crocodile (Crocodylus mindorensis) that could help them better understand how to protect and repopulate the species in the wild.
- Since 2013, the Philippines has taken steps to reintroduce captive-bred juvenile crocs into the wild.
- Eight years on, experts have discovered that the crocodiles can climb steep hilly slopes and that they’re nesting several months out from the previously understood breeding period.
- Conservationists have also welcomed two juvenile Philippine crocodiles bred at Cologne Zoo in Germany, the first of a batch of 12 from an international captive-breeding program.

The nine boundaries humanity must respect to keep the planet habitable
- All life on Earth, and human civilization, are sustained by vital biogeochemical systems, which are in delicate balance. However, our species — due largely to rapid population growth and explosive consumption — is destabilizing these Earth processes, endangering the stability of the “safe operating space for humanity.”
- Scientists note nine planetary boundaries beyond which we can’t push Earth Systems without putting our societies at risk: climate change, biodiversity loss, ocean acidification, ozone depletion, atmospheric aerosol pollution, freshwater use, biogeochemical flows of nitrogen and phosphorus, land-system change, and release of novel chemicals.
- Humanity is already existing outside the safe operating space for at least four of the nine boundaries: climate change, biodiversity, land-system change, and biogeochemical flows (nitrogen and phosphorus imbalance). The best way to prevent overshoot, researchers say, is to revamp our energy and food systems.
- In 2021, three meetings offer chances to avoid planetary boundary overshoot: the Convention on Biological Diversity meeting in Kunming, China; the U.N. Climate Summit (COP26) in Glasgow, U.K.; and the U.N. Food Systems Summit in Rome. Agreements with measurable, implementable, verifiable, timely and binding targets are vital, say advocates.

‘There are no silver bullets’ in conservation: Synchronicity Earth’s Jessica Sweidan
- Conservation is complex. If it were easy, problems like the extinction crisis, human-wildlife conflict, overexploitation of forests and oceans, and habitat degradation and loss would be resolved already.
- Conservation’s complexity arises from the need to address multiple, often conflicting, objectives that span disciplines from ecology to economics to human welfare. Synchronicity Earth, a U.K.-based charity, recognizes this and incorporates the idea of complexity into its strategy, looking to opportunities to build connections between disparate areas and seeking “overlooked and underfunded species, regions, and ecosystems.”
- Jessica Sweidan, who founded Synchronicity Earth with her husband, Adam, in 2009, says this approach emerged out of the understanding that “there were no silver bullets” in conservation.
- Sweidan talked about Synchronicity Earth and more during a February 2021 interview with Mongabay founder and CEO Rhett A. Butler.

‘The river will bleed red’: Indigenous Filipinos face down dam projects
- For more than five decades, Indigenous communities in the northern Philippines have pushed back against the planned construction of hydropower dams on the Chico River system.
- The river is of great importance to Indigenous communities in the provinces of Kalinga and Mountain Province, who call it their “river of life” and have depended on it for generations.
- The Upper Tabuk and Karayan dams have been proposed in some form or another since the 1970s, but are now backed by corporations created by Indigenous groups, causing divisions among communities.
- Critics of the dams have questioned the Indigenous consent process, a requirement for a project on tribal lands, alleging that some of the community support was obtained through bribery.

Researchers urge better protection as wetlands continue to vanish
- Wetlands provide many benefits to ecological and human communities alike, from nutrients and nurseries to flood control and climate change mitigation.
- However, as much as 87% of the world’s wetlands has been lost over the past 300 years, with much of this loss happening after 1900.
- In response, nations banded together and in 1971 ratified the Ramsar Convention on Wetlands, an intergovernmental treaty designed to facilitate wetland conservation and sustainable use around the world.
- But 50 years on, researchers say the convention has not led to effective protection and wetlands continue to blink out.

Invasion of the crayfish clones: Q&A with Ranja Andriantsoa
- An unusual invasive crayfish has been spreading in Madagascar, threatening aquatic biodiversity even as it helps nourish the country’s food-insecure population.
- The marbled crayfish (Procambarus virginalis) evolved only in recent decades as part of the German aquarium trade. It’s entirely female and reproduces clonally without males.
- Ranja Andriantsoa, a Malagasy biologist and epigenetics researcher, began studying marbled crayfish as a way to learn about cancerous tumors, which reproduce in a similar way.
- Andriantsoa’s ongoing research focuses on the social and health impacts of the marbled crayfish and aims to inform Madagascar’s strategy for managing the crayfish’s ecological impact.

Industrial agriculture threatens a wetland oasis in Bolivia
- An oasis within dry Chiquitano forest in eastern Bolivia, Concepción Lake and its surrounding wetland provide valuable habitat for 253 bird, 48 mammal and 54 fish species.
- However, despite being officially listed as a protected area, cultivation of commodity crops like soy and sorghum is expanding and supplanting habitat.
- Agricultural activity is also linked to phosphate pollution in Concepción Lake, and some think it may also be contributing to the lake’s dramatic drop in water level.
- While the clearing is illegal, local government sources say those responsible are simply paying fines and refusing to stop.

A Malagasy community wins global recognition for saving its lake
- A community association charged with managing Lake Andranobe in central Madagascar has won this year’s Equator Prize from the UNDP in the category “Nature for Water.”
- The association’s efforts, including implementing fishery closures, regulating water use, and reforestation, have led to increased fish catches and helped revive the lake ecosystem.
- As in the rest of the world, Madagascar’s wetlands are often overlooked in conservation priorities, despite the fact that freshwater species are even more threatened than terrestrial or marine biodiversity.
- The prize highlights the benefits of community-driven management, which often works better than initiatives undertaken by outsiders but also carries considerable challenges.

Conserve freshwater or land biodiversity? Why not both, new study asks
- Freshwater ecosystems, such as rivers, lakes and streams, are home to 10% of all described species, but are often overlooked in conservation planning and their populations have shown rapid declines in recent decades.
- An analysis of aquatic and terrestrial biodiversity in two regions of the Amazon Basin found that conservation planning aimed only at plants and animals on land tends not to benefit freshwater species, whereas taking a freshwater focus benefited species in both realms.
- The widest benefits can be achieved with an integrated approach, the study found: considering the needs and sensitivities of both terrestrial and freshwater creatures increased freshwater benefits by 62-345% on average, with just a 1% trade-off to terrestrial benefits.
- The study highlights the urgent need for freshwater biodiversity conservation in the Amazon, and comes as policymakers and stakeholders prepare to negotiate new goals, targets and conservation frameworks for the coming decades.

For global wetlands, intensifying droughts pose a ‘diabolical’ threat
- Covering almost one-tenth of the land area of Earth, places with wet soils provide an estimated $27 trillion in benefits to humanity per year, but, according to a newly published review paper, researchers still have much to learn about the effects of drought on wet soils.
- The review, which draws upon more than 200 published studies, says “drought poses a significant threat to wet soils, a threat which can be difficult to determine before an event but which poses a catastrophic risk to some sites.”
- Among the “most pressing” findings of the review are that published information on the effects of drought on wet soils is absent for most parts of the world outside Europe, North America and Australia, and that there’s very little research that can be applied to water management.
- The review also discusses the ramifications of droughts to climate change: As wet soils dry, increased oxygen content in the soil speeds up decomposition, releasing greenhouse gases into the atmosphere.

Mercury from gold mining contaminates Amazon communities’ staple fish
- The four species of fish most commonly consumed by Indigenous and riverine people in the Brazilian state of Amapá contain the highest concentrations of mercury.
- In some species, researchers found levels of mercury four times in excess of World Health Organization recommendations.
- The mercury comes from gold-mining activity, where it’s used to separate gold from ore before being burned off and washed into the rivers.
- The health impacts of mercury contamination are well-documented, and include damage to the central nervous system, potentially resulting in learning disabilities for children and tremors and difficulty walking for adults.

New assessment shows 74% of Sri Lanka’s freshwater fish threatened with extinction
- A recent conservation assessment of Sri Lanka’s freshwater fish has come up with a total of 139 species, of which 61 are found nowhere else on Earth.
- The new assessment showed that 74% of endemic freshwater fish are threatened with extinction: 12 are critically endangered, 24 endangered, and nine vulnerable.
- Many of Sri Lanka’s freshwater fish groups have undergone significant changes and the new study sheds much needed light on their taxonomic diversity.
- Most of Sri Lanka’s freshwater fish are found outside protected areas and are thus affected directly by all the major drivers of biodiversity loss such as habitat loss and degradation, overexploitation, pollution, invasive alien species, and climate change.

Migratory freshwater fish in peril as report shows population plunge
- A new report finds that migratory freshwater fish species have declined on a global scale by 76% since 1970, with the highest drops experienced in Europe.
- The biggest threat to migratory freshwater fish is habitat degradation or alteration, such as dams, culverts and road crossings, while other threats include habitat loss, overfishing, pollution, and climate change.
- The authors of the report recommend taking actions to help restore migratory freshwater fish populations, including the restoration of free-flowing rivers by removing dams and other obstructions.

Traditional villages dread living in shadow of Amazon tailings dams
- Mineração Rio do Norte (MRN), the world’s fourth largest bauxite producer, encroached on riverine communities beside the Trombetas River in the Brazilian Amazon in the 1970s. Over the years, MRN became notorious for its contamination of local waters with bauxite mining waste, residents say.
- To resolve that problem, the company built 26 tailings dams. The largest of these waste-holding impoundments covers 110 hectares (270 acres). The entire system for managing mining waste encompasses 1,700 hectares (4,200 acres) and is located within a national protected area.
- Brazil has suffered two catastrophic mining tailings dam collapses since 2015, leaving Trombetas riverine community residents concerned about the 26 MRN dams.
- Brazil’s National Agency of Mining has rated one of MRN’s dams as “high risk.” Fourteen more, should they fail, possess “social, environmental, economic and mortality risk.” MRN says its dams are safe. Locals are also worried over possible water contamination and loss of traditional livelihoods

Communities on Brazil’s ‘River of Unity’ tested by dams, climate change
- The Pixaim Quilombo is one of many traditional communities made up mostly of Afro-Brazilian descendants of runaway slaves. It sits at the mouth of the São Francisco River, one of Brazil’s most important waterways.
- Once a thriving community, it has been struggling for decades due to the impacts of upriver dams which reduce the river’s flow and alter aquatic migrations. As a result, one of the community’s two chief livelihoods has been sharply curtailed — the river’s fishery is in steep decline.
- Now, climate change threatens to make those struggles even greater, further changing fish populations, reducing river flow even more, and dangerously elevating the salinity of the stream as seawater intrudes. Rice, which once provided Paixim’s second major livelihood, can no longer be grown in the delta’s saltier marshes.
- Pixaim is seeing a major outmigration as subsistence livelihoods becomes more difficult. Residents there count among 18 million people residing in the São Francisco River watershed, impacted by a steadily dwindling water resource.

In the Ecuadoran Andes, protectors of the páramos guard their water source
- Climate change and human intervention, including mining, are a big threat to water security in the region.
- Through its water fund, Fonag, Ecuador is facing these challenges in an innovative way.
- The secret to the fund’s success is that it is inclusive, engaging a wide spectrum of stakeholders to ensure the continued protection of the páramos.

China held water back from drought-stricken Mekong countries, report says
- Eyes on Earth studied data from a 28-year period to determine the extent that dams in China on the Upper Mekong River impact natural water flow.
- While these dams have disrupted the river’s natural systems for years, 2019 saw a particularly damaging situation, as downstream countries faced a severe drought while the Upper Mekong received above-average rainfall.
- China’s water management practices and lack of data-sharing with neighboring countries threaten the livelihoods of roughly 60 million people.

Wise use and wetlands: Why we need to nurture nature (commentary)
- Rainforests grab the headlines, but with 87% of wetlands lost globally, it is time to nurture these immensely productive and diverse ecosystems.
- Wetlands are some of the planet’s most productive ecosystems, supporting immense biodiversity. These relatively small areas are often home to hundreds, if not thousands, of individual plant, fish, bird, reptile, and mammal species. Wetland ecosystems also provide more social benefits, per unit area, than other ecosystems, including support for farming, recreation, culture, and urban flood control. And they play a vital role in climate change mitigation and adaptation.
- We lose wetlands three times faster than natural forests, but wise use of wetlands could help reverse this trend. The central idea behind wise use is that all the benefits wetlands provide must be considered and incorporated when people make decisions that affect them.
- This post is a commentary. The views expressed are those of the author, not necessarily Mongabay.

Update to biodiversity treaty proposes protecting at least 30% of Earth
- Global policymakers have proposed extending protections to at least 30% of terrestrial, marine and freshwater ecosystems around the world.
- The coming decade of biodiversity protection looks to borrow from the Paris climate agreement by setting targets for protecting intact ecosystems, curbing the spread of invasive species, and halving pollution from organic and plastic waste.
- For biodiversity hotspots, the Convention on Biological Diversity (CBD) calls for safeguarding 60% of these areas by bringing them under the protected area framework or other management mechanisms.
- Some groups have questioned whether offering protection to 30% of areas and strict protection to only 10% will be enough to curb the alarming loss of biodiversity being witnessed globally.

Killing gods: The last hope for the world’s rarest reptile
- After decades of dams, overhunting and pollution the Yangtze giant softshell turtle is down to three known individuals.
- But conservationists say if they can just locate a male and female, survival for the world’s biggest freshwater turtle is still possible.
- The plan would be to capture the animals and keep them in a semi-wild captive state, but more funding and resources are needed to move forward.

Jakarta floods spark renewed calls for stronger environmental protection
- Environmental activists in Indonesia have renewed calls for the government to strengthen regulations to protect the environment following the recent massive flooding that hit the country’s capital and surrounding areas.
- Record rainfall and years of accumulated environmental degradation combined to create one of the deadliest floods in recent years in Jakarta.
- A group of lawyers and residents affected by the flooding say they plan to file a class-action lawsuit against the Jakarta administration for its negligence and inability to prevent and deal with the disaster.
- More heavy rains and strong winds are forecast to continue into mid-February, while authorities carry out cloud-seeding attempts to minimize rainfall hitting urban areas.

Environmental damage exacerbates Jakarta flooding amid record rainfall
- Record-breaking rainfall hit Jakarta and its satellite cities on New Year’s Eve, causing widespread flooding and leading to at least 19 deaths, authorities reported.
- Officials have attributed the severity of the disaster to years of environmental damage and waste dumping in the city’s rivers.
- The disaster has displaced more than 30,000 people, shut down an airport, and cut off some roads. More heavy rain is forecast through to next week.

Microplastics may be a macro problem for the U.S. Great Plains, too, study finds
- Though often thought of as chiefly a marine pollution issue, a new study has found microplastics in every freshwater body tested in Kansas.
- The results were published in a peer reviewed paper which was produced through an innovative collaboration between freshman students and their professor.
- As well as giving the students new insights into the issue of microplastics, writing and publishing the paper was a new perspective on the process of peer-review, one that often seems inaccessible to undergraduates.
- “When I saw my name on that fully written and polished paper, ready to get published, I was really proud to have been a part of it,” one of the undergraduate authors told Mongabay.

It’s time for Climate Bonds Initiative to scrap its hydro certification scheme (commentary)
- As world leaders, industry groups, and campaigners converge on Madrid for the climate change COP, the proponents of hydropower are out in full force, keen to profit from and perpetuate the myth of hydropower’s climate benefits.
- The Climate Bonds Initiative (CBI), a UK-based entity established to channel private finance toward addressing climate change, has aligned itself with the influential International Hydropower Association in its eagerness to capitalize on the growing market for climate-certified projects. Yet it has bitten off more than it can chew by attempting to certify hydropower projects, which prompted 276 civil society groups to call for the scheme to be abandoned.
- Climate bonds have the potential to play a critical role in ensuring positive outcomes for rivers and for effectively mitigating climate change. Clinging to its ill-advised pursuit of a hydropower standard, however, would damage the CBI’s own reputation and undermine the credibility of green bonds on the whole.
- This post is a commentary. The views expressed are those of the author, not necessarily Mongabay.

India’s Ganga River dolphins are being shouted down by noisy boats
- India’s Ganga River is getting noisier with increased ship traffic and dredging, and that’s stressing the river’s iconic dolphins and changing how they communicate, a new study has found.
- When fewer than five vessels moving on the river per hour, the dolphins seem to enhance their vocal activities to compensate for the high-frequency noise generated by the propellers.
- But as vessel traffic increases and water levels fall during the dry season, leading to more intense and sustained noise pollution, the dolphins don’t seem to alter their clicks much compared to baseline levels, the researchers found.
- This is likely because having to continuously emit clicks in a persistently noisy world can be physically taxing, forcing the endangered mammals to “either call at baseline levels or shut up,” according to the researchers.

Grassroots campaign saves major wetland in Montenegro
- Campaigners have saved the Ulcinj Salina in Montenegro from development after an 18-year campaign.
- They lobbied European Union ministers, mindful of fact that Montenegro’s leadership was looking to join the EU, but its poor environmental record was holding it back.
- They also used the influence of European diplomats to augment pressure on local officials and of the internet to broadcast their cause worldwide. They won local support with their plans for sustainable tourism.

Controversial dam gets green light to flood a Philippine protected area
- The environment department has issued an environmental compliance certificate that allows the contested Kaliwa Dam project in the Sierra Madre mountain range to go ahead, part of a wider push to secure water supplies for Manila and surrounding areas.
- The certificate is one of the last sets of documents required by the developers for the project being funded by a $238.3 million loan from the Export-Import Bank of China.
- Yet its issuance comes despite a government-conducted environmental impact assessment showing that the dam’s reservoir alone will endanger endemic wildlife and plants, drive massive species migration, and pose risks to lowland agricultural and fishing communities with a history of flash flooding.
- The site of the planned dam falls within the Kaliwa watershed forest reserve, which has been designated a natural wildlife park sanctuary and game refuge, and an IUCN Category V Protected Landscape/Seascape.

The Pan Borneo Highway brings wildlife threats to nat’l park doorstep
- The southern terminus of the Pan Borneo Highway in Malaysia extends to the edge of Tanjung Datu National Park in Sarawak.
- The highway’s proponents say the road is already bringing more tourists who are eager to see the park’s wildlife to the adjacent communities, helping to boost the local economy.
- But one of the world’s rarest primates, the Bornean banded langur, resides in the park, raising concerns in the conservation community that increased access could bring poachers into the park.

Two-thirds of Earth’s longest rivers no longer free-flowing
- Just one-third of the planet’s 242 longest rivers still flow uninterrupted along their entire length, most of them located in remote regions of the Arctic, the Amazon Basin, and the Congo Basin, according to a study to be published in Nature tomorrow.
- The international team of researchers behind the study, led by Günther Grill of Canada’s McGill University, determined that, of the 91 rivers longer than 1,000 kilometers (about 600 miles) that once emptied out into an ocean, only 21 are still unobstructed from their source to the sea.
- Dams and associated reservoirs are the biggest causes of river obstruction, the researchers say. There are nearly 60,000 large dams in the world already, and as many as 3,700 more large hydroelectric dams are currently in the planning stages or under construction.
- Healthy rivers provide a number of benefits to mankind, from recreation to food security. Ensuring the connectivity of the world’s remaining free-flowing rivers is also critical if we’re to preserve biodiversity in freshwater systems.

‘Judas’ snakes lead scientists on a high-tech Easter egg hunt for pythons
- Scientists are exploring various technologies to address the spread of highly invasive Burmese pythons, which have devastated native mammal and bird populations across much of southern Florida.
- Researchers who recently captured a large pregnant Burmese python did so using the “Judas” technique: the radio-tagging of adult pythons that will approach others of the opposite sex during the breeding season, “betraying” them to the research teams.
- More recently, separate research teams have trialed the use of environmental DNA (eDNA) to determine the spatial distribution, range limits, and expansion rates of Burmese pythons in the region. They found python eDNA within a wildlife refuge, indicating that the invaded area extends further north than previously thought and that pythons are likely resident there.

‘Nothing was left’: Flash floods, landslides hit Indonesia’s Papua region
- Flash floods and landslides triggered by torrential rain hit Indonesia’s Cyclops Mountains in Papua province on March 17, killing nearly 90 people and displacing thousands.
- The country’s disaster mitigation agency has cited human-caused deforestation as contributing to the scale of the damage.
- Indonesia’s environment ministry has called for a review of zoning plans for the housing settlements around the Cyclops Mountains, but denies that massive logging has occurred in the area.

Freshwater fishes and other threatened but overlooked biodiversity must be new flagships for conservation (commentary)
- Today there are believed to be at least 15,000 species of freshwater fishes. Only 54 percent of them have been assessed under the IUCN Red List, and one-third of these species are considered to be under threat of extinction. For the many species that remain unassessed, or for which there is too little information to make an assessment, the situation is likely to be as bad or worse.
- While there is so much to do, there are only a handful of dedicated freshwater fish conservation organizations, and few have full-time staff. Trout and salmon have received large amounts of attention and, as a consequence, there are many stories of conservation success. There are fewer stories of success for species outside North America and northern Europe. And this is what we will change with Shoal.
- The call by leading conservation agencies for a “new deal for nature” at the next Conference of the Parties of the Convention for Biological Diversity in 2020 needs to be firmly founded on neglected species, particularly freshwater biodiversity. Shoal will engage thousands of people and businesses across the globe who share a love of and stake in the future of freshwater species and healthy, productive wetlands but until now have had little opportunity to engage in the more mainstream conservation movement.
- This post is a commentary. The views expressed are those of the author, not necessarily Mongabay.

Tiny subterranean Texas salamanders could be extinct in 100 years
- A recent study has revealed the existence of three previously undescribed species living underground within an aquifer system in Central Texas.
- The authors say one of these species is critically endangered due to human over-use of the aquifer. In all, they say that this unsustainable use could mean the extinction of all aquifer salamanders in the next century.
- The researchers urge the creation of policies that would regulate groundwater usage, as well as greater protection of particularly at-risk species through the U.S. Endangered Species Act.

Brazil’s Sinop Dam flouts environmental legislation (Commentary)
- The reservoir of Brazil’s Sinop Dam began filling in January 30, 2019, killing fish in the river below the dam. Oxygen levels in the water were minimal. Only 30 percent of the vegetation had been removed from the reservoir area, rather than the 100 percent required by law – a law that has been widely ignored.
- Permission to fill the reservoir was granted based on a consultant report commissioned by the power company with modeling results predicting good water quality in the portion of the reservoir from which water is released to the river.
- The fish dieoff at Sinop draws attention to the inadequacy of the licensing system, to the responsibility of paid consultants, and to the continuing efforts of Brazil’s judicial system to return the country to legality in the environmental area.
- This post is a commentary. The views expressed are those of the author, not necessarily Mongabay.

Environmental degradation exacerbates Indonesia flooding, landslides
- Days of torrential rains in Indonesia’s South Sulawesi province killed scores of people and forced thousands to flee their homes.
- Local authorities and activists have blamed the degraded condition of the region’s rivers and watershed for amplifying the scale of the disaster.
- Upstream mining and forest clearing for farms are believed to have severely silted up the region’s rivers, rendering them prone to spilling over during heavy rains.

New climate change report highlights grave dangers for Vietnam
- Vietnam is among the most vulnerable nations to climate change impacts according to a recent International Panel on Climate Change report.
- The country’s diverse geography means it is hit by typhoons, landslides, flooding and droughts, weather events expected to worsen in coming years.
- Research has found that Vietnam is also home to abundant renewable energy potential, which could help alleviate some of these threats.

Nepali scientists deploy drones to count endangered crocodiles
- Researchers in Nepal used drone images to survey critically endangered gharial crocodiles along the banks of the Babai River, comparing their results to those of multi-team ground surveys.
- Analysis of the drone images produced counts of gharials and mugger crocodiles similar to those of ground survey teams, in less time and at a lower cost.
- The researchers stressed the importance of conducting aerial surveys when environmental conditions are most conducive, such as during the winter months when water clarity in the Babai River enables counts of gharials just under the water’s surface.

Indonesian fish farmers get early-warning system for lake pollution
- In the wake of the latest mass fish death in Indonesia’s Lake Toba, in northern Sumatra, the government has published a predictive calendar that gives fish farmers early warning of dire water conditions.
- The tool, available online and in printed form, ranks conditions on a progressive scale running from “safe” to “alert” to “dangerous.”
- In addition to the calendar, the government has also recommended other solutions, including the growing of water hyacinths to absorb pollutants in the lake, and reforestation efforts in the area.

‘Diaper Brigade’ fights a chemical crisis in Java’s rivers
- Indonesian biologist Prigi Arisandi leads a movement to tackle the dumping of millions of disposable diapers into rivers across Indonesia’s Java Island every year.
- Used diapers contain a long list of chemical components that don’t degrade easily, contaminating river ecosystems.
- Fishing the diapers from the rivers is a quick solution. Over the long term, Prigi says, governments and diaper manufacturers must establish better waste management policies, and consumers must cut back on their use of disposable diapers.

Researchers weed out a way to identify plants using environmental DNA
- Scientists have developed genetic markers to help identify plant species using environmental DNA (eDNA), the traces of biological material (pollen, spores, skin, scales, etc.) that contains an organism’s unique genetic material. Unlike animal DNA, no universal plant DNA markers exist that can be applied across many plant species and still effectively identify specimens to the species level.
- Researchers focused on one diverse aquatic plant group, pondweeds, which function as effective indicators of water conditions and quality, to make their markers as effective as possible in identifying species from water samples.
- The team detected five of the pondweed species in samples from a research reserve in Ontario, three of which were new to the reserve, demonstrating that eDNA analysis can detect plant species in water samples, including those not known from earlier studies to be present.

Podcast: Beavers matter more than you think
- We discuss one of the world’s most overlooked keystone species, the beaver, on this episode of the Mongabay Newscast.
- Environmental journalist and writer Ben Goldbarb is a big proponent of giving beavers far more attention than they’re paid. His latest book is fittingly called Eager: The Surprising, Secret Life of Beavers and Why They Matter.
- Today, the North American beaver population is on the rebound thanks to conservationists who are helping bring this keystone species back to habitat across the continent. Goldfarb tells us all about these efforts and just why beavers’ role as “ecosystem engineers” is so crucial.

Nature retention, not just protection, crucial to maintaining biodiversity and ecosystems: Scientists
- In a paper published last week in the journal Nature Ecology and Evolution, a team of Australian researchers argue that we need to shift conservation goals to focus on diverse and ambitious “nature retention targets” if we’re to truly safeguard the environment, biodiversity, and humanity.
- The researchers, who are affiliated with Australia’s University of Queensland (UQ) and the Wildlife Conservation Society (WCS), make a distinction between targets aimed at retaining natural systems and the current model that seeks to achieve targets for setting aside land as protected areas.
- Rather than simply setting a certain amount of the planet’s land and seas aside, nature retention targets would establish the baseline levels of natural system functions that we need to preserve in order to ensure the health of ecosystems and the services they provide.

‘Shocking and worrying’: Selective logging has big, lasting impact on fish
- A new study finds nearly as few fish species in selectively logged forests as they did in forests clear-cut for plantations. Both selectively logged and clear-cut areas had around half the number fish species present in protected, intact forests.
- These findings run counter to conventional wisdom that holds selective logging is not as ecologically destructive as complete deforestation.
- The study also found a similar number of fish species in streams in oil palm plantations with and without remnant forest buffers, which are often mandated in the hopes of safeguarding biodiversity.
- The study’s authors say their findings underline the importance of protecting remaining primary forest.

In Bali fish die-offs, researchers spot a human hand
- Mass fish die-offs are not uncommon in the volcanic lakes that dot Indonesia, including Bali’s Lake Batur, which sits in the crater of an active volcano.
- While sulfur releases, steep temperature gradients and other natural phenomena are responsible for some of the bigger die-offs, researchers have identified the chemicals from excess fish feed as the main culprit for the more frequent die-offs caused by oxygen depletion.
- Similar die-offs in other lakes around Indonesia have also been traced back to household and industrial waste, as well as agricultural runoff and fish farms. Researchers have warned that more than a dozen lakes could die out as soon as 2025 as a result of this chemical assault.

More than 40 percent of Madagascar’s freshwater life sliding toward extinction, IUCN finds
- In an assessment of 653 freshwater plant and animal species living on Madagascar and nearby islands, biologists found that 43 percent are threatened with extinction or there isn’t enough information to assess how well they’re doing.
- Nearly 80 percent of endemic plants examined in the study face extinction.
- The team lists unsustainable farming practices, deforestation, dam construction, mining and the overuse of natural resources, such as overfishing, as causes for the widespread declines.

Conservationists rush to save Bolivian turtles threatened by egg trafficking
- The large-scale harvesting of the yellow-spotted Amazon river turtle (Podocnemis unifilis) for human consumption has contributed to the species’ decline, according to scientists. It is currently classified as vulnerable by the IUCN.
- A series of raids in mid-2017 saw authorities seize more than 50,000 river turtle eggs from poachers in the Beni department of Bolivia.
- A conservation project is trying to help river turtle populations recover, and has released 70,000 baby turtles into the Maniqui River since 1992.

Company to probe for minerals close to Mekong River dolphin habitat
- The Phnom Penh Post reported today that Medusa Mining, an Australian company, plans to invest $3 million over four years in explorations for gold, copper, oil, gas and precious stones in tributaries of the Mekong River in Cambodia.
- Irrawaddy river dolphins, an endangered species of cetacean, live in the Mekong adjacent to the areas slated for exploration.
- Only about 80 dolphins remain in the Mekong River, and, although their numbers are on the rise, they face threats from gillnets, dams, boat traffic and water pollution, which could be exacerbated by mining activity.

Forest Code falls short in protecting Amazonian fish
- A team of scientists reports that Brazil’s Forest Code doesn’t address significant impacts that agriculture can have on fish habitat in the rainforest’s streams and tributaries.
- The study cataloged more than 130 species of fish, some of them new to science, in Brazil’s eastern Amazon.
- The authors argue for protections that encompass entire basins and the complex drainage networks that together form the lifeblood of the Amazon rainforest.

As Northwest salmon economy teeters on brink, Trump gives it a push
- Northwest salmon fisheries are in trouble, impacted by warming oceans and overdeveloped, dammed and silted spawning rivers and streams.
- Pre-contact indigenous groups in the region once organized their societies around sustainable fishing tribal agreements that worked. More recently, under past presidential administrations, Canadian, US and tribal authorities came together to save the declining salmon fisheries.
- Especially successful have been federally funded local, state and tribal programs, administered by NOAA, that protect and restore Northwest spawning streams — an investment in habitat and healthy local economies.
- Trump’s 2018 budget would cut all those programs, though for now Congress has restored them. However, politicians and regulators are concerned that Trump’s abandonment of Northwest fisheries and local economies will persist through his administration.

Amazonian manatee migration at risk from disruption by proposed dams
- Amazonian manatees (Trichechus inunguis) spend the high-water season feeding in flooded forests, but migrate to deeper permanent water bodies to see out the dry season.
- Researchers have found that as the dry season approaches, manatees time their migration out of the floodplain to avoid bottlenecks that would block their route, and doom them.
- But, the scientists warn, those bottlenecks will become far more common, and less predictable, if the hundreds of hydropower dams planned for the Amazon go forward.
- The dams, and the bottleneck problem they create, “generates profound concern for the conservation of manatees,” the scientists write.

Amazonian city drags down fish stocks in 1,000-kilometer shadow
- A study of tambaqui, a popular table fish, in the Brazilian Amazon found that fish caught near the city of Manaus are half the size of those upriver.
- Boats that buy the fish have brought the demand into the forest surrounding the city, and with holds full of ice, they’re able to travel further to bring tambaqui back to Manaus’ markets.
- The fishers living in the relatively pristine forest along the Purus River reported that tambaquie are smaller and harder to catch than they were previously, a trend extended 1,000 kilometers from Manaus, the researchers found.

Field Notes: Pond turtle studies could help sea turtles survive toxic algal blooms
- Harmful algal blooms (HABs), dubbed “red tides,” occur worldwide. When ingested, tiny, toxin-producing algae threaten marine and human life. These events — sometimes natural, but often human-induced — now happen annually on the U.S. Gulf Coast and kill endangered turtle species.
- Physiologist Sarah Milton, at Florida Atlantic University, researches the effect of HABs on freshwater turtles to improve treatment for endangered sea turtles that are rescued from toxin-filled waters.
- Milton found that pond turtles tolerate far more algal toxin than similar sized mammals can survive — resistance possibly rooted in their ability to dive, living without oxygen for months. Understanding this ability could help sickened sea turtles rescued during harmful algal outbreaks.
- Understanding the cellular mechanisms that allow pond turtles to maintain brain and body function during anoxic conditions could also help scientists improve outcomes for people who have suffered oxygen-deprivation events, such as stroke, which trigger irreversible brain cell death.

How tropical deforestation and land-use change is driving emerging infectious diseases
- There are about 250 known human emerging infectious diseases, which are those that have recently appeared within a human population or those with an incidence rate or geographic range that is rapidly increasing.
- As noted by the authors of a study published earlier this month in the journal Science Advances, many of the known emerging infectious diseases have been traced to tropical rainforests, especially freshwater aquatic systems.
- The study shows that the collapse of a freshwater food-web driven by deforestation and land-use change led to the increased prevalence of a bacterial pathogen called Mycobacterium ulcerans, which causes a skin disease in humans known as Buruli ulcer.

Keeping Amazon fish connected is key to their conservation
- Amazon basin fish species living in lakes, floodplain forests and river systems need a high degree of connectivity to stay genetically diverse and healthy, but this connectivity is threatened by proposed dams and increased drought due to climate change — both of which threaten rainy season flood cycles.
- A new study finds that understanding the dynamics of Amazon metapopulations —subgroups separated from other subgroups in lakes and river systems, which periodically mix during flood seasons or migrations — is critical to conservation.
- Unless Brazil’s federal government and communities take freshwater conservation seriously — protecting interlinked lake, floodplain and river systems — commercial fisheries, and even forest diversity (due to fish seed dispersal) could be seriously at risk.

The week in environmental news – Feb 26, 2016
- A report sponsored by the U.N. pulled from approximately 3,000 scientific papers and revealed that 40 percent of invertebrate pollinator species are facing extinction.
- The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) is working toward improving the treatment of the animals that are caught and sold around the globe.
- In order to protect biodiversity from salt pollution of freshwater, scientists are calling for a global change in the way we regulate the salinity of freshwater sources.

Two-thirds of the world’s population doesn’t have reliable access to fresh water
- Researchers say two-thirds of the global population — some four billion people, half of them in India or China — live under conditions of severe water scarcity at least one month out of the year.
- As many as half a billion people face severe water scarcity all year.
- The majority of water usage is for food, researchers say, so water scarcity primarily means decreasing or failing crop yields.

Release herpes virus to kill invasive carp in Australia, groups urge
- A coalition of conservationists, recreational fishers and farmers want Australia’s state and federal governments to get rid of European carp, or “Australia’s worst freshwater pest”, by releasing carp-specific herpes virus in Murray river.
- Scientists have shown that the koi herpesvirus, also called Cyprinid herpesvirus 3 (or CyHV-3), can be used as an effective biocontrol against the invasive carps.
- The scientists have also found that the virus doesn’t affect native Australian or important introduced species of fish, or other groups of animals including humans.

Guatemalan activist murdered after court suspends palm oil company operations
- Reforestadora de Palmas del Petén, S.A. (REPSA) is allegedly responsible for a massive fish kill along a 100-mile stretch of the La Pasión River in June. Massive overflows of organic matter from the company’s palm-oil mill effluent ponds are suspected of causing the asphyxiation of fish and other aquatic life. A government agency referred to the incident as “ecocide.”
- Residents of the municipality of Sayaxché who depend on the river for fish and water have been greatly affected by the incident. Three residents involved in groups seeking justice for the fish kill were allegedly abducted by REPSA workers on September 18. A local teacher who denounced REPSA was murdered the same day.
- The situation in Sayaxché remains tense amid ongoing investigations into the murder and REPSA’s role in the fish kill.

Energy Sprawl: Comparing biodiversity impacts of oil, gas and wind production

Energy has become a contentious and politicized topic, spurring activism, whether it be the fossil fuel divestment campaign, Keystone pipeline protests, or concern over wind turbine harm to birds. But whatever energy future we choose, two things are clear: an expanding human population will need more energy, and no matter what energy source we pick, […]
Mercury fish: gold mining puts downstream communities at risk in Peru

Pregnant mothers, children, and even adults could face health problems from gold mining pollution in Amazonian Peru An aerial view of artisinal open pit gold mining in the Amazon. Photo by: Rhett A. Butler. Artisanal, often illegal gold-mining, has swept across portions of the Peruvian Amazon over last decade, driven in part by a rising […]
‘River wolves’ recover in Peruvian park, but still remain threatened inside and out (photos)

A giant river otter with a fish in its mouth. Photo by: Frank Hajek. Lobo de río, or river wolf, is the very evocative Spanish name for one of the Amazon’s most spectacular mammals: the giant river otter (Pteronura brasiliensis). This highly intelligent, deeply social, and simply charming freshwater predator almost vanished entirely due to […]
Broken promises no more? Signs Sabah may finally uphold commitment on wildlife corridors

Five years after landmark agreement in Sabah, government shows signs of moving forward on wildlife corridors The Kinabatangan River winds through rainforest and palm oil plantations in the Malaysian state of Sabah on Borneo. Photo by: Axri Sawang/HUTAN. Five years ago an unlikely meeting was held in the Malaysian state of Sabah to discuss how […]
The price of gold: winners and losers in Latin America’s mining industry

On a Friday afternoon in June, the Plaza de Armas in Cajamarca is pulsing with life. It’s winter here, and although thick white clouds hover low in the distance, the sun in this northern Peruvian city is warm. Couples sit on benches facing one another. Kids run in the grass between flowerbeds. Men in suits […]
Bangladesh plans massive coal plant in world’s biggest mangrove forest

This is an expanded version of an article that ran on Yale e360 on October 29th, 2013: A Key Mangrove Forest Faces Major Threat from a Coal Plant. Bengal tiger in the Sundarbans mangrove forest. Photo by: Steve Winter/National Geographic and Panthera. On October 22nd Bangladeshi and Indian officials were supposed to hold a ceremony […]
Forgotten species: the arapaima or ‘dinosaur fish’

Everyone knows the tiger, the panda, the blue whale, but what about the other five to thirty million species estimated to inhabit our Earth? Many of these marvelous, stunning, and rare species have received little attention from the media, conservation groups, and the public. This series is an attempt to give these ‘forgotten species‘ some […]
Pesticides decimating dragonflies and other aquatic insects

While recent research (and media attention) has focused on the alleged negative impacts of pesticides on bees, the problem may be far broader according to a new study in the Proceedings of the US Academy of Sciences (PNAS). Looking at over 50 streams in Germany, France, and Australia, scientists in Europe and Australia found that […]
Conserving the long-neglected freshwater fish of Borneo

The 2013 Zoos and Aquariums: Committing to Conservation (ZACC) conference runs from July 8th—July 12th in Des Moines, Iowa, hosted by the Blank Park Zoo. Ahead of the event, Mongabay.com is running a series of Q&As with presenters. For more interviews, please see our ZACC feed. The Kinabatangan River in the Malaysian state of Sabah, […]
China approves another mega-dam that will imperil endangered species

Chinese environmental authorities have approved construction plans for what could become the world’s tallest dam, while acknowledging that the project would affect endangered plants and rare fish species. The 314 meter-high dam (1,030ft) will serve the Shuangjiangkou hydropower project along the Dadu river in south-western Sichuan province, according to China’s state news agency, Xinhua. A […]
World’s rarest duck on the rebound in Madagascar

After a final sighting in 1991, the Madagascar pochard was thought to have vanished for good. But this diving duck was rediscovered in 2006 when a flock of 22 individuals was found on Lake Matsaborimena in northern Madagascar by conservationists during an expedition. Soon after Madagascar pochard eggs were taken and incubated in a joint […]
The river of plenty: uncovering the secrets of the amazing Mekong

Home to giant catfish and stingrays, feeding over 60 million people, and with the largest abundance of freshwater fish in the world, the Mekong River, and its numerous tributaries, brings food, culture, and life to much of Southeast Asia. Despite this, little is known about the biodiversity and ecosystems of the Mekong, which is second […]
Yangtze porpoise down to 1,000 animals as world’s most degraded river may soon claim another extinction

A survey late last year found that the Yangtze finless porpoise (Neophocaena asiaeorientalis asiaeorientalis) population has been cut in half in just six years. During a 44-day survey, experts estimated 1,000 river porpoises inhabited the river and adjoining lakes, down from around 2,000 in 2006. The ecology of China’s Yangtze River has been decimated the […]
Over $8 billion invested in watersheds in 2011

How a sample payment for ecosystem services project works. Click to enlarge. Unlike cars, hamburgers, and computers, clean drinking water is a requirement for human survival. In a bid to safeguard this essential resource, more and more nations are moving toward protecting ecosystems, such as forests, wetlands, and streams. In fact, according to a new […]
Mekong dam spree could create regional food crisis

A fisherman on the Mekong River in Laos. Photo by: Rhett A. Butler. Fish are a hugely important protein source for many people around the world. This is no more evident than along the lower Mekong River delta where an estimated 48 million people depend directly on the river for food and livelihoods. But now […]
Chinook salmon return to Olympic National Park after dam demolished

Chinook salmon. Photo by: USGS. In March of this year the Elwha Dam, which had stood for 99 years, was demolished in the U.S. state of Washington. Five months later, Chinook salmon (Oncorhynchus tshawytscha) made their way down the river to long-blocked off habitat and entered Olympic National Park. “As I saw the fish roll, […]
North American freshwater fish going extinct at rate over 800 times the fossil record

Since 1898 North America has lost at least 39 species of freshwater fish, according to a new study in Bioscience, and an additional 18 subspecies. Moreover, the loss of freshwater fish on the continent seems to be increasing, as the rate jumped by 25 percent since 1989, though even this data may be low. “Estimates […]
Featured video: restoring rivers in the Tongass Rainforest
A new video highlights recent efforts to restore rivers in the Tongass Forest, the world’s largest intact temperate rainforest. Industrial logging in vital watersheds have hurt salmon populations and other wildlife in the region, an issue the government, along with several partners, are now trying to rectify. The salmon industry in the region is worth […]
Charting a new environmental course in China

An interview with the Nature Conservancy’s China Program. TNC staff and volunteers repairing signage at Meili Snow Mountain National Park in northwest Yunnan. Community benefits and ecotourism are at the heart of TNC’s program to establish national parks in China. Photo by: Tang Ling. Founded in 1951, The Nature Conservancy (TNC) works in more than […]
Over 30 Yangtze porpoises found dead in China as population nears extinction

There are two subspecies of the finless porpoise, one is found in the Yangtze River, the other in Japan, Taiwan, and South Korea. This individual is the latter and was photographed in a Japanese aquarium. Photo by: Kenichi Nobusue. Six years after the Yangtze river dolphin (Lipotes vexillifer), or baiji, was declared “functionally extinct” by […]
How tiny otters survive in agricultural India

An Asian small-clawed otter caught on camera trap in the Western Ghats. Photo by: Clusteronefloyd. In the fragmented rainforests of India, many animals must move through human-modified landscapes such as agricultural fields to survive. This includes the world’s smallest otter species: the Asian small-clawed otter (Aonyx cinereus). According to a new study published in mongabay.com’s […]
Saving the world’s biggest river otter

The giant river otter. Photo by: Frank Hajek. Behavior and conservation of the Amazon’s giant river otter. Charismatic, vocal, unpredictable, domestic, and playful are all adjectives that aptly describe the giant river otter (Pteronura brasiliensis), one of the Amazon’s most spectacular big mammals. As its name suggest, this otter is the longest member of the […]
The Cryosphere-Princeton primers in climate: A Book Review

The Cryosphere by Dr. Shawn J. Marshall, Canada Research Chair in Climate Change, University of Calgary, is an excellent book because it summarizes leading scientific research into easily accessible chapters each one on a different component of the cryosphere. The cryosphere, which incorporates the Earth’s snow and ice mass including seasonal snow, permafrost (both land-based […]
Florida loses two species to extinction

The US Fish and Wildlife Service announced yesterday that the believe two species in Florida have vanished into the long dark night: the South Florida rainbow snake (Farancia erytrogramma seminola) and the Florida fairy shrimp (Dexteria floridana). The species were under review for possibly being added to the Endangered Species Act (ESA), but it’s likely […]
Opposition rises against Mekong dam as governments ponder decision

Mekong river at Chiang Saen in Thailand. Photo by: Rhett A. Butler. As the governments of Laos, Thailand, Cambodia, and Vietnam ready to meet on April 19th to decide whether or not to move forward on the Xayaburi Dam, critics of Mekong River hydroelectric project have warned that the dam will devastate freshwater biodiversity and […]
Giant fish help grow the Amazon rainforest

Researchers discover that overexploited fish are long-distance seed dispersers. The giant tambaqui (Colossoma macropomum) in Manaus Fish Market, Brazil. Photo by: Thorke Østergaard. A fruit in the flooded Amazon falls from a tree and plops in the water. Before it can even sink to the floor, a 60-pound monster fish with a voracious appetite gobbles […]
More biodiversity equals cleaner water, but why?

New study shows how greater biodiversity more efficiently scrubs pollutants from freshwater. A new landmark study not only proves that adding more species to a freshwater stream linearly increases the ecosystem’s ability to clean pollutants, but also shows why. The study, published in Nature found that by increasing the biodiversity of a lab controlled mini-stream […]
Want water? save forests

The UN-backed Collaborative Partnership on Forests (CPF) is urging nations to conserve their forests in a bid to mitigate rising water scarcity problems. “[Forests] reduce the effects of floods, prevent soil erosion, regulate the water table and assure a high-quality water supply for people, industry and agriculture,” said the Forestry Department Assistant Director General, Eduardo […]
Photos: two new freshwater stingrays discovered in the Amazon

Heliotrygon gomesi in dorsal view. Photo taken by Ken Jones, University of Toronto at Scarborough Staff Photographer. Few people probably realize that in the rivers and lakes of the Amazon rainforest large stingrays glide, searching for crustaceans and small fish. Equipped with a powerful barbed tail they are often feared by locals. However, even as […]

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