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Bird and bat species’ global vulnerability to collision mortality at wind farms revealed through a trait-based assessment 

Author:  | Wildlife

Abstract —
Mitigation of anthropogenic climate change involves deployments of renewable energy worldwide, including wind farms, which can pose a significant collision risk to volant animals. Most studies into the collision risk between species and wind turbines, however, have taken place in industrialized countries. Potential effects for many locations and species therefore remain unclear. To redress this gap, we conducted a systematic literature review of recorded collisions between birds and bats and wind turbines within developed countries. We related collision rate to species-level traits and turbine characteristics to quantify the potential vulnerability of 9538 bird and 888 bat species globally. Avian collision rate was affected by migratory strategy, dispersal distance and habitat associations, and bat collision rates were influenced by dispersal distance. For birds and bats, larger turbine capacity (megawatts) increased collision rates; however, deploying a smaller number of large turbines with greater energy output reduced total collision risk per unit energy output, although bat mortality increased again with the largest turbines. Areas with high concentrations of vulnerable species were also identified, including migration corridors. Our results can therefore guide wind farm design and location to reduce the risk of large-scale animal mortality. This is the first quantitative global assessment of the relative collision vulnerability of species groups with wind turbines, providing valuable guidance for minimizing potentially serious negative impacts on biodiversity.

Chris B. Thaxter, Graeme M. Buchanan, Jamie Carr, Stuart H. M. Butchart, Tim Newbold, Rhys E. Green, Joseph A. Tobias, Wendy B. Foden, Sue O’Brien, and James W. Pearce-Higgins

British Trust for Ornithology, Thetford, Norfolk, UK (CBT, JWP-H)
British Trust for Ornithology, Cambridge, UK (CBT, JWP-H)
RSPB Centre for Conservation Science, Royal Society for the Protection of Birds, Edinburgh, UK (GMB)
International Union for Conservation of Nature, Cambridge, UK (JC)
BirdLife International, Cambridge, UK (SHMB)
Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment, University College London, London, UK (TN)
Conservation Science Group, Department of Zoology, University of Cambridge, Cambridge, UK (REG, JWP-H)
RSPB Centre for Conservation Science, Cambridge, UK (REG)
Department of Life Sciences, Imperial College London, Ascot, UK (JAT)
Department of Botany and Zoology, University of Stellenbosch, Matieland, Stellenbosch, South Africa (WBF)
Joint Nature Conservation Committee, Aberdeen, UK (SO’B)

Proceedings of the Royal Society B, volume 284, issue 1862. Published online 13 September 2017.
DOI: 10.1098/rspb.2017.0829

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This material is the work of the author(s) indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this material resides with the author(s). As part of its noncommercial educational effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Queries e-mail.

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