Migratory diversity predicts population declines in birds

Gilroy, James ORCID: https://orcid.org/0000-0002-7597-5780, Gill, Jennifer, Butchart, Stuart, Jones, Victoria and Franco, Aldina ORCID: https://orcid.org/0000-0001-6055-7378 (2016) Migratory diversity predicts population declines in birds. Ecology Letters, 19 (3). 308–317. ISSN 1461-023X

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Abstract

Declines in migratory species are a pressing concern worldwide, but the mechanisms underpinning these declines are not fully understood. We hypothesised that species with greater within-population variability in migratory movements and destinations, here termed ‘migratory diversity’, might be more resilient to environmental change. To test this, we related map-based metrics of migratory diversity to recent population trends for 340 European breeding birds. Species that occupy larger non-breeding ranges relative to breeding, a characteristic we term ‘migratory dispersion’, were less likely to be declining than those with more restricted non-breeding ranges. Species with partial migration strategies (i.e. overlapping breeding and non-breeding ranges) were also less likely to be declining than full migrants or full residents, an effect that was independent of migration distance. Recent rates of advancement in Europe-wide spring arrival date were greater for partial migrants than full migrants, suggesting that migratory diversity may also help facilitate species responses to climate change.

Item Type: Article
Uncontrolled Keywords: sdg 13 - climate action ,/dk/atira/pure/sustainabledevelopmentgoals/climate_action
Faculty \ School: Faculty of Science > School of Environmental Sciences
Faculty of Science > School of Biological Sciences
Depositing User: Pure Connector
Date Deposited: 03 Jun 2016 10:00
Last Modified: 21 Oct 2022 02:38
URI: https://ueaeprints.uea.ac.uk/id/eprint/59205
DOI: 10.1111/ele.12569

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