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Assembly of Avian Mixed-Species Flocks in Amazonia

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dc.contributor.author Graves, Gary R. en
dc.contributor.author Gotelli, N. J. en
dc.date.accessioned 2010-02-24T19:47:29Z
dc.date.available 2010-02-24T19:47:29Z
dc.date.issued 1993
dc.identifier.citation Graves, Gary R. and Gotelli, N. J. 1993. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F8692">Assembly of Avian Mixed-Species Flocks in Amazonia</a>." <em>Proceedings of the National Academy of Sciences of the United States of America</em>. 90 (4):1388&ndash;1391. en
dc.identifier.issn 0027-8424
dc.identifier.uri http://hdl.handle.net/10088/8692
dc.description.abstract Diamond&#39;s &#39;&#39;assembly rules&#39;&#39; model posits that competitive interactions among species govern the composition of avifaunas. Although originally applied to islands in archipelagoes, this controversial set of hypotheses is difficult to test because islands differ in habitat and resource availability, colonization history, and stochastic effects. Permanent mixed-species flocks of Amazonian birds are a model system for testing the assembly rules hypothesis because flocks occur in relatively homogeneous tracts of rain forest and because resident species are potentially interactive from minute to minute. To analyze cooccurrence patterns of species in flocks, we used null models that incorporate realistic autecological colonization parameters. Potentially competing pairs of congeneric species with similar ecologies cooccur in flocks less often than expected by chance, resulting in perfect checkerboard distributions. Interactions among more distantly related species, however, appear to have little effect on the assembly of mixed-species flocks. Checkerboard distributions enhance local species diversity within habitats by generating different combinations of species in different flocks. This process may have contributed to the immense species richness of the Amazonian avifauna. en
dc.relation.ispartof Proceedings of the National Academy of Sciences of the United States of America en
dc.title Assembly of Avian Mixed-Species Flocks in Amazonia en
dc.type Journal Article en
dc.identifier.srbnumber 75028
rft.jtitle Proceedings of the National Academy of Sciences of the United States of America
rft.volume 90
rft.issue 4
rft.spage 1388
rft.epage 1391
dc.description.SIUnit NMNH en
dc.description.SIUnit NH-Vertebrate Zoology en
dc.citation.spage 1388
dc.citation.epage 1391


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