Spatially explicit risk mapping reveals direct anthropogenic impacts on migratory birds

Buchan, Claire, Franco, Aldina M. A., Catry, Inês, Gamero, Anna, Klvaňová, Alena and Gilroy, James J. (2022) Spatially explicit risk mapping reveals direct anthropogenic impacts on migratory birds. Global Ecology and Biogeography. ISSN 1466-822X

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Abstract

Aim: Migratory species rely on multiple ranges across the annual cycle, rendering them vulnerable to a wide range of spatially disparate anthropogenic threats. The spatial distribution of these threats will strongly influence the magnitude of their population-scale effects, but this has not been quantitatively assessed for most species. Location: Europe, Central Asia, Western Asia, Africa. Time period: Modern. Major taxa studied: Aves. Methods: We combined remote-sensed data and expert opinion to map sixteen anthropogenic threats relevant to migratory birds across Europe, Africa and the Middle East – including the first spatially-explicit pan-continental assessment of relative hunting pressure. By combining the resulting composite threat maps with species range polygons and morpho-behavioural traits-based weightings (reflecting relative threat susceptibility), we created species-specific risk maps for 103 Afro-Palaearctic migratory birds breeding in Europe and evaluated how spatial threat vulnerability relates to long-term population trends. Results: We found that greater vulnerability to direct mortality threats (including hunting pressure, infrastructure and nocturnal lights), especially in the non-breeding season, is associated with declining bird population trends. Main conclusions: Our results emphasise the importance of spatially explicit approaches to quantifying anthropogenic drivers of population declines. Composite risk maps represent a valuable resource for spatial analyses of anthropogenic threats to migratory birds, allowing for targeted conservation actions.

Item Type: Article
Additional Information: Research Funding: European Commission. Grant Number: 07.0202/2019/821208/SER/ENV.D.2; Fundação para a Ciência e a Tecnologia. Grant Number: DL57/2016/CP1440/CT0023; Natural Environment Research Council. Grant Number: NE/L002582/1 Data accessiblity: The relative hunting risk layers created in this manuscript are available as geotiffs from Figshare at https://doi.org/10.6084/m9.figshare.19745830 (Buchan et al. 2022a); all other layers are derived from publicly available sources listed in Table 1. The composite risk scores used in the analysis are available from Figshare at https://doi.org/10.6084/m9.figshare.19745983 (Buchan et al. 2022b).
Faculty \ School: Faculty of Science > School of Biological Sciences
Faculty of Science > School of Environmental Sciences
Depositing User: LivePure Connector
Date Deposited: 26 May 2022 10:30
Last Modified: 05 Jul 2022 00:19
URI: https://ueaeprints.uea.ac.uk/id/eprint/85178
DOI: 10.1111/geb.13551

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