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This Year in Conservation Science: Elephants, Sharks, Mountains, Bees, and More

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Friday, December 20, 2024

Every month scientific journals publish hundreds of new papers about endangered species and wildlife conservation. It’s a firehose of information in a world that feels increasingly in flames. That’s why I started writing this column. “This Month in Conservation Science” is an opportunity to sort through some of that critical research and filter it for an audience who can put these scientific discoveries to good use. Our first few columns looked at papers published over specific four-week periods. This month, as we all wrap up 2024, we asked researchers to send us their best or favorite papers of the past year. We received submissions that offer hope, guidance, analysis, and insight into emerging threats. Stuart Pimm, president of Saving Nature, recommended a paper he and his colleagues published in Science Advances revealing surprising news for elephants. He wrote: “The public may think that elephants in the African savannah are in freefall. In fact, over the last quarter century, their numbers have held their own across Southern Africa (mid-Tanzania southwards), an area that holds three-quarters of them. The paper shows what strategies led to this success and recommends that connecting now-isolated populations will be vital for future progress.” Sukakpak Mountain. Photo: Bob Wick/BLM Aerin Jacob, director of science and research at Nature Conservancy of Canada, sent a coauthored paper from Conservation Biology about mountains — a habitat type that deserves more attention. “People often think that mountain ecosystems are so rugged and inaccessible that they don’t need habitat protection, but that’s not true,” she wrote. “We studied six major mountain regions around the world and found that on average half of them are as modified as the rest of the world; two-thirds of them don’t (yet) meet the 30×30 global protection target; and existing protected areas don’t include the vast majority of mountain ecosystem types. Mountains are super-important for biodiversity, ecosystem function, and the benefits people get from nature. We ignore them at our peril.” Speaking of 30×30, marine expert Stacy Jupiter with the Wildlife Conservation Society recommended a paper in Marine Policy, cowritten by two other WCS specialists, that she tells us sought to “identify highly productive marine areas around the world to help the world achieve the protection of at least 30% of the planet by 2030. This analysis adds to the current body of knowledge by exploring the notion of marine productivity as an enabling condition that drives ecological integrity in marine ecosystems. It’s a critically important feature to inform and complement future conservation efforts.” An endangered Caribbean reef shark. Photo: Brian Gratwicke (CC BY 2.0) Sticking with the ocean, shark scientist David Shiffman (a frequent Revelator contributor) sent a commentary he published in Integrative & Comparative Biology about how misinformation shapes the public’s perspective on shark conservation. “This invited commentary summarizes the last decade of my research into public misunderstanding of ocean conservation issues,” he wrote. “In a career sitting in rooms with global science and conservation experts and a career talking to the interested public about how to save the ocean, I’ve noticed something striking: both groups talk about the same issues, but they talk about them very differently. This inspired a decade-long research project looking at where concerned members of the public learn about ocean conservation threats and their policy solutions, and what type of information is spread through those information pathways. It turns out that nearly every information pathway is flooded with misunderstandings if not straight-up pseudoscience, a big problem as we work to save endangered species and key ecosystems.”   View this post on Instagram   A post shared by Charles Eutsler (@charles.eutsler) Sharks get a lot of press, but many other species fly under the radar. Wildlife trade researcher Lalita Gomez shared a Discover Animals paper cowritten with frequent Revelator contributor Chris Shepherd about a cat-like mammal called the binturong that faces an underappreciated threat. “This little creature is currently being traded under the radar in large numbers for the pet trade, which is ridiculous considering its vulnerable status,” she wrote. “The online trade of live animals is also out of hand and with this paper we push for stronger regulation of social media platforms that perpetuate the trade.” Shepherd, meanwhile, was the senior author of a paper in the European Journal of Wildlife Research that examined Canada’s role in international wildlife trade. “Wildlife trade is embedded in Canada’s history, dating back to the early fur traders, evolving to include multiple commodities such as the contemporary fur industry and the thriving pet trade of today,” he wrote. “Considering recent reports of animals legally and illegally imported into Canada and the potential threats of wildlife trade studied elsewhere, wildlife trade may pose risks to Canada’s natural heritage, biodiversity, biosecurity, and animal welfare. Our review underscores the need to enhance academic knowledge and policy tools to effectively identify and address trade issues concerning Canadian and nonnative wildlife.” Continuing the theme of wildlife trade, Neil D’Cruze shared a Journal of Environmental Management paper from several authors at World Animal Protection and John Jay College of Criminal Justice that “highlights significant gaps in global wildlife trade laws despite a century of growing legislation. Examining 11 biodiversity-rich countries, the research found that the Global Biodiversity Index does not correlate with the scope of wildlife trade laws. Legislation is unevenly distributed across trade stages, with animal welfare notably underrepresented, particularly in captive breeding and farming. Our study urges the alignment of national and international regulations to address critical gaps, protect biodiversity, and prioritise animal welfare, emphasising its importance for public health and environmental sustainability.” Moving on to a different topic, let’s talk about the damaging ways people move through the natural world. William Laurance, distinguished research professor at James Cook University, shared a Nature paper led by one of his Ph.D. students about ghost roads — often-illegal roads that don’t exist on maps but pose a serious danger to ecosystems. “Globally, ghost roads are one of the most serious, understudied threats to ecosystems and biodiversity — especially in poorer nations that harbor much of Earth’s biodiversity,” he wrote. We also heard from Dr. Sara Cannon with the Centre for Indigenous Fisheries at the Institute for the Oceans and Fisheries, who was the lead author of a paper in Facets that argued the open data movement is putting too much pressure on Indigenous people to make their scientific data public. “This paper highlights why Indigenous data sovereignty is crucial for addressing environmental challenges like climate change and cumulative effects on ecosystems, particularly salmon-bearing watersheds in British Columbia,” she writes. “It underscores the need for respectful collaborations between Indigenous knowledge-holders and external researchers, offering actionable steps to honor Indigenous data sovereignty and improve data management practices. By reading this paper, the public can better understand how Indigenous data sovereignty supports ecosystem resilience and empowers Indigenous communities to maintain sovereignty over their territories and knowledge.”   View this post on Instagram   A post shared by Wildlife Conservation Society Mongolia (@wcs.mongolia) Samantha Strindberg of the WCS submitted two papers, both authored with expansive teams, that showcased the value of large, long-term conservation monitoring programs. The first, published in Oryx, assessed the population size of the Mongolian gazelle. “The Eastern Steppe of Mongolia harbors the largest remaining temperate grassland on the planet and is home to millions of Mongolian gazelles,” she wrote. “This is the first comprehensive assessment of this species that roams over 750,000 square kilometers, predominantly (91%) in the Mongolian open plains, and also Russia and China. It highlights the importance of comprehensive monitoring surveys and the value of cross-border collaboration to provide important information for conservation of this species in the long-term.” The second, published in Primates, examined great ape surveys: “The Republic of Congo expanded the Nouabalé-Ndoki National Park to include the gorilla-rich, previously unlogged forest of the Djéké Triangle. These survey results for western lowland gorilla and central chimpanzee are part of a 25-year history of globally important scientific research on the ecology and behavior of western lowland gorillas. Empirical evidence of the environmental value and strategic conservation importance supported the inclusion of the Djéké Triangle into the NNNP with long-term monitoring results also informing best-practice standards and ape tourism certification.” Finally, this month, we heard from Liber Ero Postdoctoral Fellow Jayme Lewthwaite, who recommended a paper she didn’t work on as one of the best she’s seen in 2024. Published in Nature Sustainability, lead author Laura Melissa Guzman and colleagues examined the effects of pesticides on wild bee distributions in the United States. “This paper is so important because it’s the first national assessment of how pesticide use is affecting native bees across their ranges,” Lewthwaite wrote. “While overall pesticide use has plateaued in the U.S., Guzman et al. show that the novel pesticides that are increasingly being favored (such as neonicotinoids) are extremely deadly to native insects, perhaps more than any of their predecessors. While this was suspected and shown through a few studies in the UK (where they were subsequently banned), this is the first study to do so in the U.S. on such a large taxonomic and spatial scale. We should all be worried about the decline of native bees because they are by far the most effective pollinators out of any group, and this has important food security implications.” We’ll return to our regular format next month, which will link to papers published between Dec. 15, 2024, and Jan. 15, 2025. We’re happy to hear from any author or team with a new paper coming out in a peer-reviewed journal or other publication during that timeframe, especially if you’re from the Global South or an institution without much public-relations support. For consideration in a future column, drop us a link at tips@therevelator.org and use the subject line TMICS. Scroll down to find our “Republish” button The post This Year in Conservation Science: Elephants, Sharks, Mountains, Bees, and More appeared first on The Revelator.

We asked conservation researchers to send us their best papers of 2024. They surprised us with some powerful and important science. The post This Year in Conservation Science: Elephants, Sharks, Mountains, Bees, and More appeared first on The Revelator.

Every month scientific journals publish hundreds of new papers about endangered species and wildlife conservation. It’s a firehose of information in a world that feels increasingly in flames.

That’s why I started writing this column. “This Month in Conservation Science” is an opportunity to sort through some of that critical research and filter it for an audience who can put these scientific discoveries to good use.

Our first few columns looked at papers published over specific four-week periods. This month, as we all wrap up 2024, we asked researchers to send us their best or favorite papers of the past year. We received submissions that offer hope, guidance, analysis, and insight into emerging threats.

Stuart Pimm, president of Saving Nature, recommended a paper he and his colleagues published in Science Advances revealing surprising news for elephants. He wrote: “The public may think that elephants in the African savannah are in freefall. In fact, over the last quarter century, their numbers have held their own across Southern Africa (mid-Tanzania southwards), an area that holds three-quarters of them. The paper shows what strategies led to this success and recommends that connecting now-isolated populations will be vital for future progress.”

Sukakpak Mountain
Sukakpak Mountain. Photo: Bob Wick/BLM

Aerin Jacob, director of science and research at Nature Conservancy of Canada, sent a coauthored paper from Conservation Biology about mountains — a habitat type that deserves more attention. “People often think that mountain ecosystems are so rugged and inaccessible that they don’t need habitat protection, but that’s not true,” she wrote. “We studied six major mountain regions around the world and found that on average half of them are as modified as the rest of the world; two-thirds of them don’t (yet) meet the 30×30 global protection target; and existing protected areas don’t include the vast majority of mountain ecosystem types. Mountains are super-important for biodiversity, ecosystem function, and the benefits people get from nature. We ignore them at our peril.”

Speaking of 30×30, marine expert Stacy Jupiter with the Wildlife Conservation Society recommended a paper in Marine Policy, cowritten by two other WCS specialists, that she tells us sought to “identify highly productive marine areas around the world to help the world achieve the protection of at least 30% of the planet by 2030. This analysis adds to the current body of knowledge by exploring the notion of marine productivity as an enabling condition that drives ecological integrity in marine ecosystems. It’s a critically important feature to inform and complement future conservation efforts.”

Caribbean reef shark
An endangered Caribbean reef shark. Photo: Brian Gratwicke (CC BY 2.0)

Sticking with the ocean, shark scientist David Shiffman (a frequent Revelator contributor) sent a commentary he published in Integrative & Comparative Biology about how misinformation shapes the public’s perspective on shark conservation. “This invited commentary summarizes the last decade of my research into public misunderstanding of ocean conservation issues,” he wrote. “In a career sitting in rooms with global science and conservation experts and a career talking to the interested public about how to save the ocean, I’ve noticed something striking: both groups talk about the same issues, but they talk about them very differently. This inspired a decade-long research project looking at where concerned members of the public learn about ocean conservation threats and their policy solutions, and what type of information is spread through those information pathways. It turns out that nearly every information pathway is flooded with misunderstandings if not straight-up pseudoscience, a big problem as we work to save endangered species and key ecosystems.”

 

View this post on Instagram

 

A post shared by Charles Eutsler (@charles.eutsler)

Sharks get a lot of press, but many other species fly under the radar. Wildlife trade researcher Lalita Gomez shared a Discover Animals paper cowritten with frequent Revelator contributor Chris Shepherd about a cat-like mammal called the binturong that faces an underappreciated threat. “This little creature is currently being traded under the radar in large numbers for the pet trade, which is ridiculous considering its vulnerable status,” she wrote. “The online trade of live animals is also out of hand and with this paper we push for stronger regulation of social media platforms that perpetuate the trade.”

Shepherd, meanwhile, was the senior author of a paper in the European Journal of Wildlife Research that examined Canada’s role in international wildlife trade. “Wildlife trade is embedded in Canada’s history, dating back to the early fur traders, evolving to include multiple commodities such as the contemporary fur industry and the thriving pet trade of today,” he wrote. “Considering recent reports of animals legally and illegally imported into Canada and the potential threats of wildlife trade studied elsewhere, wildlife trade may pose risks to Canada’s natural heritage, biodiversity, biosecurity, and animal welfare. Our review underscores the need to enhance academic knowledge and policy tools to effectively identify and address trade issues concerning Canadian and nonnative wildlife.”

Continuing the theme of wildlife trade, Neil D’Cruze shared a Journal of Environmental Management paper from several authors at World Animal Protection and John Jay College of Criminal Justice that “highlights significant gaps in global wildlife trade laws despite a century of growing legislation. Examining 11 biodiversity-rich countries, the research found that the Global Biodiversity Index does not correlate with the scope of wildlife trade laws. Legislation is unevenly distributed across trade stages, with animal welfare notably underrepresented, particularly in captive breeding and farming. Our study urges the alignment of national and international regulations to address critical gaps, protect biodiversity, and prioritise animal welfare, emphasising its importance for public health and environmental sustainability.”

Moving on to a different topic, let’s talk about the damaging ways people move through the natural world. William Laurance, distinguished research professor at James Cook University, shared a Nature paper led by one of his Ph.D. students about ghost roads — often-illegal roads that don’t exist on maps but pose a serious danger to ecosystems. “Globally, ghost roads are one of the most serious, understudied threats to ecosystems and biodiversity — especially in poorer nations that harbor much of Earth’s biodiversity,” he wrote.

We also heard from Dr. Sara Cannon with the Centre for Indigenous Fisheries at the Institute for the Oceans and Fisheries, who was the lead author of a paper in Facets that argued the open data movement is putting too much pressure on Indigenous people to make their scientific data public. “This paper highlights why Indigenous data sovereignty is crucial for addressing environmental challenges like climate change and cumulative effects on ecosystems, particularly salmon-bearing watersheds in British Columbia,” she writes. “It underscores the need for respectful collaborations between Indigenous knowledge-holders and external researchers, offering actionable steps to honor Indigenous data sovereignty and improve data management practices. By reading this paper, the public can better understand how Indigenous data sovereignty supports ecosystem resilience and empowers Indigenous communities to maintain sovereignty over their territories and knowledge.”

Samantha Strindberg of the WCS submitted two papers, both authored with expansive teams, that showcased the value of large, long-term conservation monitoring programs. The first, published in Oryx, assessed the population size of the Mongolian gazelle. “The Eastern Steppe of Mongolia harbors the largest remaining temperate grassland on the planet and is home to millions of Mongolian gazelles,” she wrote. “This is the first comprehensive assessment of this species that roams over 750,000 square kilometers, predominantly (91%) in the Mongolian open plains, and also Russia and China. It highlights the importance of comprehensive monitoring surveys and the value of cross-border collaboration to provide important information for conservation of this species in the long-term.”

The second, published in Primates, examined great ape surveys: “The Republic of Congo expanded the Nouabalé-Ndoki National Park to include the gorilla-rich, previously unlogged forest of the Djéké Triangle. These survey results for western lowland gorilla and central chimpanzee are part of a 25-year history of globally important scientific research on the ecology and behavior of western lowland gorillas. Empirical evidence of the environmental value and strategic conservation importance supported the inclusion of the Djéké Triangle into the NNNP with long-term monitoring results also informing best-practice standards and ape tourism certification.”

Finally, this month, we heard from Liber Ero Postdoctoral Fellow Jayme Lewthwaite, who recommended a paper she didn’t work on as one of the best she’s seen in 2024. Published in Nature Sustainability, lead author Laura Melissa Guzman and colleagues examined the effects of pesticides on wild bee distributions in the United States. “This paper is so important because it’s the first national assessment of how pesticide use is affecting native bees across their ranges,” Lewthwaite wrote. “While overall pesticide use has plateaued in the U.S., Guzman et al. show that the novel pesticides that are increasingly being favored (such as neonicotinoids) are extremely deadly to native insects, perhaps more than any of their predecessors. While this was suspected and shown through a few studies in the UK (where they were subsequently banned), this is the first study to do so in the U.S. on such a large taxonomic and spatial scale. We should all be worried about the decline of native bees because they are by far the most effective pollinators out of any group, and this has important food security implications.”


We’ll return to our regular format next month, which will link to papers published between Dec. 15, 2024, and Jan. 15, 2025. We’re happy to hear from any author or team with a new paper coming out in a peer-reviewed journal or other publication during that timeframe, especially if you’re from the Global South or an institution without much public-relations support. For consideration in a future column, drop us a link at tips@therevelator.org and use the subject line TMICS.

Scroll down to find our “Republish” button

The post This Year in Conservation Science: Elephants, Sharks, Mountains, Bees, and More appeared first on The Revelator.

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Reform of NZ’s protected lands is overdue – but the public should decide about economic activities

Changes to New Zealand’s conservation laws could delist up to 60% of protected areas. There are better ways to balance ecological values with economic gains.

Getty ImagesThe government’s proposed reforms of the rules governing public conservation land aim to dismantle any potential obstacle to “unleashing economic growth” in protected areas. Currently, about a third of New Zealand’s land is under protection. This ranges from national parks (11.6%) to stewardship areas (9.4%) and conservation parks (5.7%). Twelve other designations make up the rest. Some commercial activities are permitted – including guided walks, aircraft-based sightseeing, ski fields and animal grazing – and approved by the Department of Conservation as “concessions”. The proposed changes to the Conservation Act include a review of land designation. The government could delist or swap up to 60% of the current area under protection. Conservation Minister Tama Potaka said he can’t indicate which designations or locations would be delisted. Nor can he say what percentage of conservation lands would be affected – and where – because changes will be driven by demand for land. The minister only committed to leaving untouched the designations that are difficult to change: national parks, wilderness areas, reserves and world heritage sites. The question of whether more economic benefits can be obtained from protected areas is legitimate. New Zealand does need a radical reform of its conservation areas and legislation. There is potential for better social and economic outcomes. But the proposal consolidates ministerial discretion to unprecedented levels and the government follows a misguided fast-track approach to permitting economic activities such as mining. This could take native biodiversity into dangerous territory. Outdated conservation laws New Zealand holds tight to an outdated approach known as “fortress conservation”. This limits commercial opportunities to specific areas, mostly concentrated around established facilities (roads, hotels) and the edges of designated lands. Even when regulating other activities such as energy generation or agriculture, the idea has been to “sacrifice” some spaces and keep as much land as possible “locked up”. A key reason was that people didn’t know enough about the ecological values of the land. As a proxy, lawmakers relied on the subjective concepts of wilderness values and intrinsic values to justify strict protections over most lands. Insufficient scientific input meant authorities have relied on “ecologically blind” zoning frameworks, such as a planning tool known as the recreation opportunity spectrum. This divides lands according to recreational opportunities and visitor needs. But there is a better path forward – one that allows public decision making and honours international commitments, while achieving better ecological and economic benefits. Towards regulations informed by science This alternative approach is grounded in three key principles. First, it uses gap analysis to identify which ecosystems and species are underprotected. Second, it relies on regulations shaped by ecological knowledge and conservation priorities. Third, it applies the principles of proportionality and precaution, meaning that regulatory responses should match the severity, reversibility and likelihood of environmental harm. Currently, New Zealand’s regulatory framework does not reflect this. New Zealand has signed the Kunming-Montreal Global Biodiversity Framework. This means at least 30% of conservation lands must be representative of most, if not all, native ecosystems by 2030. At present, coastal, lowland and dryland ecosystems are under-represented. In contrast, alpine and montane environments, are represented way above the recommended threshold (20% of the remaining cover for that ecosystem). If up to 60% of conservation lands were to be swapped or delisted without prioritising representativeness, vulnerability and rarity, the ecological losses may be immense and irreversible. Rethinking protection categories My research develops a broader reform approach. It also reflects growing international consensus on the need for science-informed conservation planning. I argue New Zealand should set up region-specific and nationwide fora, such as citizen assemblies or consensus conferences. Conversations should focus on specific topics, informed by scientists and iwi. Vulnerable or under-represented ecosystems currently require stronger protection. Deliberations should indicate which activities should be limited or excluded to better protect such areas. We must also consider vulnerability to climate change. Scientists expect that ecosystems may migrate outside protected areas. Consensus should be built around what qualifies as a “significantly over-represented” native ecosystem. Where ecosystems are already well protected and resilient, the public should discuss whether re-designation, land exchanges or even disposals may be appropriate. If lands are retained, consensus should be sought on the economic uses that can maintain ecological health. If the public doesn’t support land delisting or swaps, alternative strategies must be developed to improve ecological representativeness. Sustainable funding mechanisms should also be identified to support these efforts. The Department of Conservation should work with independent scientists and iwi to develop a new zoning framework to guide commercial concessions and recreational access. This framework should capture the principles highlighted above. When applied to each area, it should also enable the mapping of the ecological values feasible to protect. This would help select bespoke regulatory options. In turn, it would balance biodiversity and economic outcomes for each context. Guidance for these steps should be incorporated in a new national strategy, aligned with domestic goals such as the biodiversity strategy and international commitments. New Zealand has the expertise for smart reforms. New Zealanders have the passion for nature and patience required to engage in deliberations. But will politicians have the wisdom to avoid a totally unnecessary mutilation of conservation lands, for undefined biodiversity gains? Valentina Dinica does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

EPA to undergo layoffs amid shutdown fight

The Environmental Protection Agency (EPA) is among the agencies where federal workers will be laid off by the Trump administration in the ongoing federal government shutdown. Employees in the EPA’s Resource Conservation and Sustainability Division received an email indicating that the agency would be undertaking a reduction in force (RIF).  That division undertakes recycling initiatives and...

The Environmental Protection Agency (EPA) is among the agencies where federal workers will be laid off by the Trump administration in the ongoing federal government shutdown. Employees in the EPA’s Resource Conservation and Sustainability Division received an email indicating that the agency would be undertaking a reduction in force (RIF).  That division undertakes recycling initiatives and seeks to reduce food waste and plastic pollution. It’s not immediately clear how many people will be impacted and if any additional offices within EPA will also face layoffs.  “This notice is to inform you that the U.S. Environmental Protection Agency will be conducting a Reduction in Force,” said the email from Steven Cook, principal deputy assistant administrator for the Office of Land and Emergency Management.  “This action is necessary to align our workforce with the Agency’s current and future needs and to ensure the efficient and effective operation of our programs,” Cook wrote.  Asked about layoffs broadly, an EPA spokesperson told The Hill via email, "It’s unfortunate that Democrats have chosen to shut down the government and brought about this outcome. If they want to reopen the government, they can choose to do so at any time.”  The agency did not address questions from The Hill about which offices were facing cuts and how many people would be fired. It did not immediately respond to follow up questions about the resource conservation and sustainability division. Unions representing federal employees have been critical of the Trump administration’s moves.  “This is the latest way that the Trump administration is weaponizing this furlough against federal employees, stopping them from serving the American people to the best of their ability,” Nicole Cantello, president of the AFGE Local 704 union, which represents EPA staffers in the Midwest,  told The Hill. The notice comes after the Trump administration threatened to lay off federal workers if Democrats do not pass a bill to fund the government. Democrats are trying to get Republicans to pass legislation aimed at bringing down healthcare costs before they agree to fund the government. The administration has also more broadly sought to cut the federal workforce, including through earlier rounds of layoffs and buyouts. 

More than half of world’s bird species in decline, as leaders meet on extinction crisis

Biodiversity losses are growing, the IUCN reports as summit opens, but green turtle’s recovery ‘reminds us conservation works’More than half of all bird species are in decline, according to a new global assessment, with deforestation driving sharp falls in populations across the planet.On the eve of a key biodiversity summit in the UAE, scientists have issued a fresh warning about the health of bird populations, with 61% of assessed species now recording declines in their numbers. Continue reading...

More than half of all bird species are in decline, according to a new global assessment, with deforestation driving sharp falls in populations across the planet.On the eve of a key biodiversity summit in the UAE, scientists have issued a fresh warning about the health of bird populations, with 61% of assessed species now recording declines in their numbers.From Schlegel’s asity in Madagascar to the tail-bobbing northern nightingale-wren in Central America, many bird species have lost habitat to expanding agriculture and human development. Just nine years ago, 44% of assessed bird species had declining populations, according to the red list of endangered species from the International Union for Conservation of Nature (IUCN).Dr Ian Burfield, BirdLife’s global science coordinator, who helped oversee the assessment, said: “That three in five of the world’s bird species have declining populations shows how deep the biodiversity crisis has become and how urgent it is that governments take the actions they have committed to under multiple conventions and agreements.”It comes as hundreds of conservationists gather in Abu Dhabi on Friday for the IUCN’s congress, where the fate of many of the world’s most at-risk wildlife species will be discussed. In the face of global headwinds on environmental action, scientists are urging governments to deliver on recent pledges to better protect nature.Birds play an important role in ecosystems, helping to pollinate flowers, disperse seeds and control pests. Hornbills – which are found across the tropics – can spread up to 12,700 large seeds a day in a square kilometre.Dr Malin Rivers, head of conservation prioritisation at the Botanic Gardens Conservation International, said: “The fates of birds and trees are intertwined: trees depend on birds for regeneration and birds depend on trees for survival.”The green sea turtle’s recovery “reminds us that conservation works”, said the IUCN director general, Dr Grethel Aguilar. Once classified as endangered, it is now viewed as a species of least concern due to conservation efforts. The turtles’s numbers have grown by 28% since the 1970s thanks to greater protection for nest sites in Ascension Island, Brazil, Mexico and Hawaii.A Pacific green sea turtle cruising off Hawaii. The recovery of the species shows what global conservation efforts can achieve, experts say. Photograph: Chris Strickland/AlamyRoderic Mast, co-chair of IUCN’s species survival commission marine turtle specialist group, said the green turtle’s recovery was “a powerful example of what coordinated global conservation over decades can achieve to stabilise and even restore populations of long-lived marine species”.But there was bad news for Arctic seals, which scientists warn are drifting closer to extinction due to global heating. The loss of sea ice has seen population numbers for bearded and harp seals fall sharply. Thinning sea ice means that the Artic seals are finding it more difficult to find areas to rest and breed. They are a critical prey species for polar bears, which researchers fear will also be affected by the loss.Dr Kit Kovacs, Svalbard programme leader at the Norwegian Polar Institute, said: “Each year in Svalbard, the retreating sea ice reveals how threatened Arctic seals have become, making it harder for them to breed, rest and feed.“Their plight is a stark reminder that climate change is not a distant problem – it has been unfolding for decades and is having impacts here and now.”Find more age of extinction coverage here, and follow the biodiversity reporters Phoebe Weston and Patrick Greenfield in the Guardian app for more nature coverage.

Would a ban on genetic engineering of wildlife hamper conservation?

Some conservation groups are calling for an effective ban on genetic modification, but others say these technologies are crucial for preserving biodiversity

The idea of genetically modifying wild lions divides opinionAndrewfel/Shutterstock Should we genetically modify wild lions? Of course not, might be your instant response. But what if lions were being wiped out by a devastating disease introduced by people? What if the genetic change was a tiny tweak that makes them immune to this disease, of the sort that might evolve naturally given enough time and enough dead lions? These kinds of questions are dividing conservationists, and matters are about to come to a head. In the coming week, at a meeting of the International Union for Conservation of Nature (IUCN) – the world’s leading conservation organisation – delegates will vote on a motion that would “pause” any form of genetic engineering of wildlife, including the introduction of modified microbes. “I have no idea how the vote will go,” says Piero Genovesi at the Institute for Environmental Protection and Research in Italy, who helped draft an open letter opposing the proposed motion. An IUCN moratorium on synthetic biology would have no legal force, but it could still have far-reaching effects. For instance, many conservation organisations might stop funding work involving genetic engineering, and some countries could make such a ban part of national laws. “The moratorium would certainly be problematic on many levels,” says Ben Novak at Revive & Restore, a US-based non-profit that aims to use biotechnologies to rescue endangered and extinct species. Why is this happening now? In a word, CRISPR. In 2014, it was shown that CRISPR gene-editing technology can be used to create gene drives – basically, a piece of DNA that gets passed down to all offspring, rather than the usual half. This means a gene drive can spread even if it is harmful and could, in theory, be used to wipe out invasive species. Gene drives could also be used to spread beneficial traits, such as disease resistance. At a conference in Hawaii in 2016, there was talk of using gene drives to get rid of the invasive mosquitoes that have wiped out half of Hawaii’s native bird species, says Genovesi. Some conservationists were enthusiastic; others were horrified. That triggered the events leading to the proposed moratorium. “Gene drives are being pushed quite strongly by some as the panacea for dealing with all sorts of environmental problems,” says Ricarda Steinbrecher at EcoNexus, a research organisation that is among those backing a moratorium. But the broad wording of the proposed motion applies to far more than gene drives. It would rule out most de-extinction efforts, for instance, and could also be seen as banning live vaccines. Steinbrecher says a moratorium is a pause, not a permanent block, and that there could be another vote to end it “when we have more data”. But some of those backing the ban are campaign groups opposed to any genetic engineering, so it is hard to see what would change their minds. “I am afraid it could be a very long ban,” says Genovesi. Take the idea of using gene editing to make wild animals resistant to diseases. Steinbrecher says gene editing could have unintended side effects. But the evidence we have suggests the risks are low – which is why several gene-edited foods are already being eaten, and why the first CRISPR treatment for people got approved last year. The same benefits-versus-risks considerations apply with conservation. Is it really better to stand by and watch coral reefs being wiped out by global warming than to, say, release genetically engineered algal symbionts that give corals more heat tolerance? A key issue is scalability, says Novak. Divers transplanting corals by hand are never going to save reefs. “This is where synthetic biology tools are vital,” he says. “The overall goals of restoring 30 per cent of land to nature, of saving species, etc, will not be attainable without synthetic biology.” Ultimately, this is about competing visions of nature. Some see nature as pristine and sacrosanct, and are appalled by the idea of any genetic meddling. But humans have been transforming nature ever since we wiped out most megafauna. We are already unintentionally meddling genetically by imposing all kinds of selection pressures. Hunting, pollution, pesticides, invasive species and introduced diseases are forcing many plants and animals to change to survive. Some elephant populations are nearly tuskless, for instance. Of course, this doesn’t mean that more meddling will make things better. There are indeed serious risks to releasing gene drives – for instance, gene drives designed to wipe out invasive species might spread to the native range of the target species. But researchers are very aware of the risks. And there are ways to reduce them, for instance by making gene drives self-limiting so they cannot just spread indefinitely. “We are facing a dramatic crisis of biodiversity,” says Genovesi. “We shouldn’t close the door to new tools that could help us combat some of the major threats.” Conservation and rewilding in the Central Apennines: Italy Journey into Italy’s Central Apennines region for a fascinating introduction to the concept and practicalities of rewilding.

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