Marine subsidies mediate patterns in avian island biogeography
| Autor: | Obrist, Debora S., Hanly, Patrick J., Kennedy, Jeremiah C., Fitzpatrick, Owen T., Wickham, Sara B., Ernst, Christopher M., Nijland, Wiebe, Reshitnyk, Luba Y., Darimont, Chris T., Starzomski, Brian M., Reynolds, John D., Landdegradatie en aardobservatie, Landscape functioning, Geocomputation and Hydrology |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Insular biogeography marine-derived nutrients Terrestrial biota 010603 evolutionary biology 01 natural sciences Population density Biochemistry General Biochemistry Genetics and Molecular Biology Birds Environmental Science(all) Immunology and Microbiology(all) Temperate climate Animals 14. Life underwater General Environmental Science Islands Population Density spatial subsidies General Immunology and Microbiology British Columbia Ecology island biogeography Agricultural and Biological Sciences(all) Biochemistry Genetics and Molecular Biology(all) 010604 marine biology & hydrobiology Species diversity Subsidy General Medicine δ15N Biodiversity 15. Life on land Biota Phylogeography Geography avian ecology Species richness General Agricultural and Biological Sciences Research Article Genetics and Molecular Biology(all) |
| Zdroj: | Proceedings of the Royal Society B: Biological Sciences Proceedings. Biological sciences, 287(1922). Royal Society of London |
| ISSN: | 0962-8452 |
| Popis: | The classical theory of island biogeography , which predicts species richness using island area and isolation, has been expanded to include contributions from marine subsidies, i.e. subsidized island biogeography (SIB) theory . We tested the effects of marine subsidies on species diversity and population density on productive temperate islands, evaluating SIB predictions previously untested at comparable scales and subsidy levels. We found that the diversity of terrestrial breeding bird communities on 91 small islands (approx. 0.0001–3 km 2 ) along the Central Coast of British Columbia, Canada were correlated most strongly with island area, but also with marine subsidies. Species richness increased and population density decreased with island area, but isolation had no measurable influence. Species richness was negatively correlated with marine subsidy, measured as forest-edge soil δ 15 N. Density, however, was higher on islands with higher marine subsidy, and a negative interaction between area and subsidy indicates that this effect is stronger on smaller islands, offering some support for SIB. Our study emphasizes how subsidies from the sea can shape diversity patterns on islands and can even exceed the importance of isolation in determining species richness and densities of terrestrial biota. |
| Databáze: | OpenAIRE |
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