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Charting the course of reed-warblers across the Pacific islands

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dc.contributor.author Cibois, Alice en
dc.contributor.author Beadell, Jon S. en
dc.contributor.author Graves, Gary R. en
dc.contributor.author Pasquet, Eric en
dc.contributor.author Slikas, Beth en
dc.contributor.author Sonsthagen, Sarah A. en
dc.contributor.author Thibault, Jean-Claude en
dc.contributor.author Fleischer, Robert C. en
dc.date.accessioned 2012-02-06T19:42:22Z
dc.date.available 2012-02-06T19:42:22Z
dc.date.issued 2011
dc.identifier.citation Cibois, Alice, Beadell, Jon S., Graves, Gary R., Pasquet, Eric, Slikas, Beth, Sonsthagen, Sarah A., Thibault, Jean-Claude, and Fleischer, Robert C. 2011. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F17642">Charting the course of reed-warblers across the Pacific islands</a>." <em>Journal of Biogeography</em>. 38 (10):1963&ndash;1975. <a href="https://doi.org/10.1111/j.1365-2699.2011.02542.x">https://doi.org/10.1111/j.1365-2699.2011.02542.x</a> en
dc.identifier.issn 1365-2699
dc.identifier.uri http://hdl.handle.net/10088/17642
dc.description.abstract Aim Deciphering the complex colonization history of island archipelagos is greatly facilitated by comprehensive phylogenies. In this study we investigate the phylogeny and biogeography of the insular reed-warblers (genus Acrocephalus) of the tropical Pacific Ocean, from Australia to eastern Polynesia. Location Oceania. Methods We used sequences of mitochondrial DNA (cytochrome b, ND2 and ATP8 genes) to infer the colonization patterns of reed-warblers endemic to Pacific islands and Australia. We sampled all known taxa of Acrocephalus in the Pacific except A. luscinius nijoi, for which no sample was available. Most taxa were represented by toe-pad samples from museum specimens collected in the 19th and 20th centuries. With a few exceptions, several specimens per taxon were sequenced independently in two institutions (Smithsonian Institution and Natural History Museum of Geneva). Results Our data indicate that Pacific reed-warblers do not form a monophyletic group, because A. luscinius luscinius from Guam falls outside the main Pacific radiation. The remaining Pacific taxa are divided into two clades: one clade includes all the reed-warblers from Micronesia (except Guam) and Australia, and two Polynesian taxa from the Line Islands and the southern Marquesas; the other clade includes all remaining Polynesian taxa. The taxa endemic to three archipelagos (Mariana, Marquesas and Society islands) are polyphyletic, suggesting several independent colonizations. Main conclusions Our results provide evidence for a complex pattern of colonization of the Pacific by reed-warblers. Calibration analyses suggest that reed-warbler lineages are much younger than the ages of the islands they occupy. Several remote archipelagos were colonized independently more than once. Consequently, we infer that the colonization of reed-warblers in the Pacific did not follow a regular, stepping-stone-like pattern. The phylogeny also suggests a previously undetected case of reverse colonization (from island to continent) for the Australian lineage and indicates that A. luscinius, as currently defined, is not monophyletic. We discuss the supertramp strategy of reed-warblers in the Pacific and show that, although Pacific reed-warblers meet some of the supertramp criteria in their aptitude for colonizing remote archipelagos, their life history characteristics do not fit the model. en
dc.relation.ispartof Journal of Biogeography en
dc.title Charting the course of reed-warblers across the Pacific islands en
dc.type Journal Article en
dc.identifier.srbnumber 103106
dc.identifier.doi 10.1111/j.1365-2699.2011.02542.x
rft.jtitle Journal of Biogeography
rft.volume 38
rft.issue 10
rft.spage 1963
rft.epage 1975
dc.description.SIUnit Peer-Reviewed en
dc.description.SIUnit NZP en
dc.description.SIUnit NMNH en
dc.description.SIUnit NH-Vertebrate Zoology en
dc.citation.spage 1963
dc.citation.epage 1975

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