News
Importance of rear-edge populations under climate change |
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Climate change threatens wildlife populations globally. Particularly rear-edge populations that typically occupy warmer areas than core populations are at stake when temperatures rise. In our new paper, we show for Caucasian grouse that rear-edge populations harbor important adaptive capacity for species to adapt to warmer climates. Our study also demonstrates that ignoring rear-edge populations in range shift predictions leads to a substantial underestimation of the future potential range. Preventing the loss of rear-edge populations should therefore be a priority to support climate change adaptation for species. |
How do human behaviours impact wildlife movements? |
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We introduce the term ‘anthropogenic resistance’ as the approximation of human psychological and socioeconomic factors that can impact species’ movement, and highlight how to include anthropogenic resistance in connectivity planning to ensure functionality of corridors. |
Habitat amount or habitat fragmentation: what drives time-delayed responses of biodiversity to land-use change? |
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Land-use change is the most important driver of species’ extinctions, but how fast do species respond to landscape change, and how important is habitat loss versus fragmentation? We showed that birds and mammals in the Argentine Dry Chaco go locally extinct where habitat loss dominates, however, they can persist in fragmented landscapes. These findings contribute to better understand the effect of habitat fragmentation and the drivers of extinction debt – and the window of time we have to avert future extinctions. |
ERC Consolidator Grant awarded to Tobias Kuemmerle to work on biodiversity conservation in tropical dry forests |
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The ERC project SYSTEMSHIFT will work at the intersection of Land System Science and Conservation Science. We will develop new approaches, based on social-ecological systems, to assess how land-use actors relate to threats to biodiversity, how different threats interact, and how to consider both for better conservation planning. SYSTEMSHIFT will focus on the world’s tropical dry forests, with case studies in the Chaco and Chiquitano forests in South America – both of them hotspots of land-use change, deforestation and biodiversity loss. |
Habitat destruction and hunting reduce mammal diversity in the world’s largest tropical dry forest |
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All aspects of the mammalian diversity have sufferend widespread declines across much of South America’s 1.1 million km2 Gran Chaco region, a global deforestation hotspot. This represent a widespread impoverishment of mammal species richness, branches of their evolutionary tree of life and the ecological roles they perform that contribute to ecosystem functioning and nature’s contributions to people. |
Mapping wildlife habitat dynamics from Landsat time series |
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In our new paper, we show how to move beyond one-time snapshots in wildlife habitat mapping with Landsat time series. Combining animal movement data with the LandTrendr algorithm, we document partially diverging responses by two deer species to different forest disturbances. Our findings highlight long-term impacts of forest disturbance on deer habitat with important implications for wildlife and forest management. |
Landscape context determines agriculture-biodiversity trade-offs |
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Mitigating the strong trade-offs between agriculture and biodiversity has become a central goal for conservation planning and land-use planning alike. A new paper in Landscape Ecology, led by Ricardo Torres, shows that landscape configuration is an important factor determining how these trade-offs play out. In the Argentine Chaco, a global deforestation hotspot, trade-offs were often lower for more heterogeneous and mixed landscapes. Together, this suggests landscape design can realize co-benefits between agriculture and biodiversity—in the Gran Chaco and elsewhere. |
A post-Soviet shift in disturbance regime changed the vegetation structure on the Eurasian steppe |
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Post-Soviet declines in livestock grazing on the Kazakh steppe caused the disturbance regime to shift from grazer to fire control. Differing effects of grazing and fire on the functional composition of plant communities suggest widespread changes in vegetation structure, with poorly understood implications for biodiversity and ecosystem functions. |
Conservation priorities for restoring Bezoar goats in the Caucasus |
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Mountain ungulates around the world have been decimated to small, isolated populations. Our new paper in Conservation Science & Practice showcases an approach to spatially target threat‐specific restoration actions for bezoar goats in the Caucasus. We find widespread suitable habitat, but much of it is unoccupied. The reason for this is likely high poaching pressure that prevents natural recolonization. Our approach and map allow to pinpoint priority patches for specific restoration measures, such as reintroductions and anti‐poaching action. |
Europe’s primary forests: What to protect? Where to restore? |
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Primary forests are an irreplaceable part of our natural heritage and are critical for conserving forest biodiversity. We used a unique geodatabase to assess the conservation status of Europe’s primary forests, and highlight protection gaps and priorities for restoration. Overall, primary forests are in a perilous state, and are not representative of Europe’s diversity of forest types. Yet, there are considerable opportunities for ensuring better protection and restoring primary forest structure, composition and functioning, at least partially. |
Fight Fire with Trade |
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Our three tenets of sustainable trade—inclusion, transparency, and enforcement—are widely applicable and provide policymakers, producers, consumers, and the wider international community with a clear and practical pathway toward supporting human rights, a habitable climate, and a healthy environment. |
Mapping the direct and indirect effects of agricultural expansion on species |
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We developed an approach to isolate and map the direct and indirect effects of agricultural expansion on species, using the giant anteater in the Gran Chaco as an example. Anteater occupancy decreased substantially since 1985, particularly after 2000 when agriculture expanded rapidly. Importantly, anteater occupancy declined over much wider areas than those directly affected by forest loss, suggesting that agricultural expansion has substantial indirect effects on species. |
Ecosystem services decline drastically as agriculture expands in the Argentine Chaco |
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Agricultural expansion often leads to drastic changes in ecosystem functions and services, but the spatial patterns of these changes often remain elusive. A new paper in the Journal of Applied Ecology, led by Paula Barral, shows how non-parametric spatial clustering can be used to identify typical bundles of ecosystem functions and services – and how land-use changes alters them in the Argentine Chaco, a global deforestation hotspot. This provides a spatial template for land use planning to address and mitigate trade-offs between ecosystem services. |
Conservation strategies must adapt when landscapes change |
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- Agriculture provides societies with food and biomass, but where agriculture expands into tropical and subtropical forests, biodiversity losses can be large. - Understanding how exactly agriculture impacts biodiversity is therefore critically important for helping farmers and planners to find ways to avoid biodiversity losses. Read more... |
Topographic correction matters: Land-cover mapping in the Caucasus |
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Our study found that topographic correction matters for land-cover mapping, especially for discriminating forest typesin steep terrain, and examinedthree decades of Landsat imagery revealingthat cropland loss was the most prevalentland-cover change in the Caucasus. |
Does conflict inhibit connectivity for big cats? |
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Maintaining connectivity is among important conservation measures against habitat fragmentation. Yet, conflict risk may compromise the functionality of corridors. In this study, we show that by ignoring human-leopard conflict, safe corridors are substantially overestimated in NE Iran. |
Land grabs lead to increasing deforestation in the tropics |
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Land acquisitions in the tropics by multinational companies or countries have been a growing phenomenon recently, but it remains unclear whether that leads to more deforestation. A new study, led by Kyle Davis from the University of Delaware, analyzed over 82,000 individual land deals in 15 tropical countries to show that land deals do indeed target areas with disproportionally high forest cover and that once deals are made they lead to increased deforestation. This emphasizes the need for stronger policies curbing the negative environmental impacts of land deals. |
Post-Soviet rewilding in the Eurasia steppes results in increasing landscape connectivity |
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In the steppes of Kazakhstan, large-scale passive rewilding maybe taking place, substantially increasing protected area connectivity! Using a unique combination of satellite imagery and historic topographic maps we developed a set of spatial indicators that allowed to spatially assess post-Soviet trends in human influence. |
Spy satellites reveal species’ declines |
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Species’ responses to land use conversions can occur on timescales not previously observed for mammals. Marmot burrow densities declined for over 60 years following agricultural conversions. To demonstrate these remarkable long-term responses, we relied on a novel data source for conservation - Corona spy satellite imagery from the Cold War. |
PhD Position on biodiversity responses to land-use change in the former Soviet Union |
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The Conservation Biology department at the University of Göttingen (Germany) seeks highly qualified and motivated candidates for a PhD Position on biodiversity responses to Application deadline: 30 June 2020 |
Cropland distribution and local climate shape bird beta diversity |
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Using generalized dissimilarity models we find that cropland distribution and local climate characteristics are important factors in shaping beta diversity of birds in the South American Dry Chaco. |
Increasing joint impacts of habitat destruction and hunting on mammals in the Gran Chaco |
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Habitat destruction and overexploitation – the main threats to biodiversity worldwide – are increasingly affecting several mammal species in the same areas. In such areas, the total effect of both threats may be even larger than the sum of the parts, likely resulting in fast biodiversity loss. Our work identifies priority areas for protection, as well as hotspots were one or both threats should be managed in order to save the imperiled biodiversity of the Chaco. |
Trade in soybean and beef affect Jaguars more than trafficking |
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The increasing trade in jaguar body parts to China have drawn global conservation attention. However, we argue that the trade in soybean and beef pose far greater threats to jaguars through increasing habitat destruction and direct killing that they promote. Conservation should focus on these threats and their interactions with trafficking. |
Cattle systems in the Dry Chaco |
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Cattle production has major impacts on the environment, but these impacts vary depending on the cattle production systems. Data on these systems are notoriously scarce, which is a real obstacle for context-specific impact assessments and spatial planning. Here, we developed a novel approach that combines vaccination data, which contains detailed information on the location and composition of cattle herds, with fine-scale land-cover information to map cattle production systems. |
A novel Landsat-derived index shows a 73% drop in grazing pressure on the Eurasian steppe |
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Producing food while maintaining biodiversity is a global challenge and fierce debates exist about the optimal strategy to do so. We show that the best strategy depends on both species response to agriculture as well as the productive capacity of land. |
Maintaining biodiversity may take multiple land use strategies |
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Producing food while maintaining biodiversity is a global challenge and fierce debates exist about the optimal strategy to do so. We show that the best strategy depends on both species response to agriculture as well as the productive capacity of land. |
Fires scorching Bolivia's Chiquitano forest |
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The Chiquitano dry Forest, the world’s largest and best preserved tropical dry forest, has lost a staggering 1.4 million ha (~12 of its total area) to forest fires over weeks in 2019. The Bolivian government should revise the legislation encouraging agricultural expansion to protect these unique forest. |
Mapping marmots from space |
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We used Google Earth and Bing images to map the distribution of Bobak marmot (Marmota bobak) across its range in Kazakhstan and southern Russia (~950,000 km2). Our ground-truth survey showed that the imagery we used are suitable for detection marmot burrows form space. Based on we occurrence data we built habitat models and derived a new population estimate for the species in Kazahkstan. |
Land-use change caused a tremendous increase in steppe fires in Kazakhstan |
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Dissolution of the Soviet Union resulted in an unprecedented cropland and grazing abandonment. We detected a sevenfold increase in burned area in northern Kazahkstan using Landsat imagery. This change in fire regimes can be attributed to post-Soviet land-use change. |
Connectivity or isolation? Wisent reintroductions in Poland |
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In this study, we developed an approach to identify candidate reintroduction sites to increase connectivity as well as to serve as potential reservoirs. We used European bison (wisents) as an example and mapped 47 reintroduction candidate sites in Poland. |
Assessing the impacts of deforestation on collared peccaries at the population and individual level |
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In this study, we developed an approach to identify candidate reintroduction sites to increase connectivity as well as to serve as potential reservoirs. We used European bison (wisents) as an example and mapped 47 reintroduction candidate sites in Poland. |
Mapping habitat suitability directly from the Landsat archive |
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We show that Landsat-based spectral-temporal metrics can significantly improve habitat assessments for large mammals when compared to land-cover maps, better capturing fine scale variation and temporal dynamics in habitat conditions. |
