Seasonal species richness of birds on the world's islands and its geographical correlates

La Sorte, Frank A., Somveille, Marius ORCID: https://orcid.org/0000-0002-6868-5080, Dokter, Adriaan M. and Miller, Eliot T. (2022) Seasonal species richness of birds on the world's islands and its geographical correlates. Proceedings of the Royal Society B: Biological Sciences, 289 (1980). ISSN 0962-8452

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Abstract

The presence of migratory birds on islands results in seasonal variation in species richness. These patterns and their geographical correlates within the context of island biogeography theory have not been examined. We used 21 years of bird observations on 690 islands from eBird to determine how seasonal species richness estimates vary as a function of island area, isolation and latitude. Species richness was highest on islands within the northern mid-latitudes during migration and on islands within tropical latitudes during the non-breeding season. Area defined positive, nonlinear relationships with species richness across seasons, with the steepest slopes occurring with islands greater than 1100 km 2. Distance to mainland defined negative, nonlinear relationships with species richness across seasons, with the strongest slopes occurring with islands located greater than 150 km from the mainland. Species-area relationships were weakest for the most remote islands and strongest for islands at intermediate distances to the mainland. Intermediate proximity to other islands was a poor predictor of species richness. Our findings emphasize the presence of seasonally dynamic geographical relationships, the enhanced role of evolutionary processes on larger islands, the unique ecology of the world's most remote islands, and the importance of islands as stopover sites and wintering grounds for migratory bird species.

Item Type:	Article
Additional Information:	Data accessibility: The bird occurrence data are available from https://ebird.org/science/use-ebird-data and the shoreline vector coverage of the world's continents and islands is available from [ref 38; (doi:10.1080/1755876X.2018.1529714)]. All data used in the analysis are available at https://doi.org/10.5061/dryad.m0cfxpp67. Funding Information: This work was supported by The Wolf Creek Charitable Foundation and the National Science Foundation (ABI sustaining: DBI-1939187).
Uncontrolled Keywords:	area,island biogeography,isolation,latitude,migratory birds,species richness,biochemistry, genetics and molecular biology(all),immunology and microbiology(all),environmental science(all),agricultural and biological sciences(all) ,/dk/atira/pure/subjectarea/asjc/1300
Faculty \ School:	Faculty of Science > School of Environmental Sciences
Related URLs:	http://www.scopus.com/inward/record.url?... https://discovery.ucl.ac.uk/id/eprint/10...
Depositing User:	LivePure Connector
Date Deposited:	22 Jul 2024 14:31
Last Modified:	08 Sep 2024 15:31
URI:	https://ueaeprints.uea.ac.uk/id/eprint/95995
DOI:	10.1098/rspb.2022.1105

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