Historical and projected future range sizes of the world’s mammals, birds, and amphibians

Robert M. Beyer () and Andrea Manica
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Robert M. Beyer: University of Cambridge
Andrea Manica: University of Cambridge

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Species’ vulnerability to extinction is strongly impacted by their geographical range size. Formulating effective conservation strategies therefore requires a better understanding of how the ranges of the world’s species have changed in the past, and how they will change under alternative future scenarios. Here, we use reconstructions of global land use and biomes since 1700, and 16 possible climatic and socio-economic scenarios until the year 2100, to map the habitat ranges of 16,919 mammal, bird, and amphibian species through time. We estimate that species have lost an average of 18% of their natural habitat range sizes thus far, and may lose up to 23% by 2100. Our data reveal that range losses have been increasing disproportionately in relation to the area of destroyed habitat, driven by a long-term increase of land use in tropical biodiversity hotspots. The outcomes of different future climate and land use trajectories for global habitat ranges vary drastically, providing important quantitative evidence for conservation planners and policy makers of the costs and benefits of alternative pathways for the future of global biodiversity.

Date: 2020
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DOI: 10.1038/s41467-020-19455-9

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