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How far are birds, bats, and terrestrial mammals displaced from onshore wind power development? A systematic review
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Highlights
- 63 %, 72 %, and 67 % of bird, bat, and mammal cases respectively reported displacement.
- Cranes, owls and semi-domestic reindeer were displaced on average up to 5 km.
- Bats were displaced on average up to 1 km in 21 out of 29 cases.
- Findings of no displacement resulted from methodology, species, and environment.
- Information on displacement helps to mitigate the effects of wind power on wildlife.
Abstract
Wind power is a rapidly growing source of energy worldwide. It is crucial for climate change mitigation, but it also accelerates the degradation of biodiversity through habitat loss and the displacement of wildlife. To understand the extent of displacement and reasons for observations where no displacement is reported, we conducted a systematic review of birds, bats, and terrestrial mammals. Eighty-four peer-reviewed studies of onshore wind power yielded 160 distinct displacement distances, termed cases. For birds, bats, and mammals, 63 %, 72 %, and 67 % of cases respectively reported displacement. Cranes (3/3 cases), owls (2/2), and semi-domestic reindeer (6/6) showed consistent displacement on average up to 5 km. Gallinaceus birds showed displacement on average up to 5 km, but in 7/18 cases reported to show “no displacement”. Bats were displaced on average up to 1 km in 21/29 cases. Waterfowl (6/7 cases), raptors (24/30), passerines (16/32) and waders (8/19) were displaced on average up to 500 m. Observations of no displacement were suggested to result from methodological deficiencies, species-specific characteristics, and habitat conditions favorable for certain species after wind power development. Displacement-induced population decline could be mitigated by situating wind power in low-quality habitats, minimizing the small-scale habitat loss and collisions, and creating high-quality habitats to compensate for habitat loss. This review provides information on distance thresholds that can be employed in the design of future wind energy projects. However, most studies assessed the effects of turbine towers of <100 m high, while considerably larger turbines are being built today.
Anne Tolvanen, Henri Routavaara, Mika Jokikokko, Parvez Rana
Natural Resources Institute Finland, Oulu
Biological Conservation Volume 288, December 2023, 110382
doi:10.1016/j.biocon.2023.110382
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