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Unexpected evolutionary diversity in a recently extinct Caribbean mammal radiation
Identifying general patterns of colonization and radiation in island faunas is often hindered by past human-caused extinctions. The insular Caribbean is one of the only complex oceanic-type island systems colonized by land mammals, but has witnessed the globally highest level of mammalian extinction...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4424637/ https://www.ncbi.nlm.nih.gov/pubmed/25904660 http://dx.doi.org/10.1098/rspb.2014.2371 |
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author | Brace, Selina Turvey, Samuel T. Weksler, Marcelo Hoogland, Menno L. P. Barnes, Ian |
author_facet | Brace, Selina Turvey, Samuel T. Weksler, Marcelo Hoogland, Menno L. P. Barnes, Ian |
author_sort | Brace, Selina |
collection | PubMed |
description | Identifying general patterns of colonization and radiation in island faunas is often hindered by past human-caused extinctions. The insular Caribbean is one of the only complex oceanic-type island systems colonized by land mammals, but has witnessed the globally highest level of mammalian extinction during the Holocene. Using ancient DNA analysis, we reconstruct the evolutionary history of one of the Caribbean's now-extinct major mammal groups, the insular radiation of oryzomyine rice rats. Despite the significant problems of recovering DNA from prehistoric tropical archaeological material, it was possible to identify two discrete Late Miocene colonizations of the main Lesser Antillean island chain from mainland South America by oryzomyine lineages that were only distantly related. A high level of phylogenetic diversification was observed within oryzomyines across the Lesser Antilles, even between allopatric populations on the same island bank. The timing of oryzomyine colonization is closely similar to the age of several other Caribbean vertebrate taxa, suggesting that geomorphological conditions during the Late Miocene facilitated broadly simultaneous overwater waif dispersal of many South American lineages to the Lesser Antilles. These data provide an important baseline by which to further develop the Caribbean as a unique workshop for studying island evolution. |
format | Online Article Text |
id | pubmed-4424637 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-44246372015-05-22 Unexpected evolutionary diversity in a recently extinct Caribbean mammal radiation Brace, Selina Turvey, Samuel T. Weksler, Marcelo Hoogland, Menno L. P. Barnes, Ian Proc Biol Sci Research Articles Identifying general patterns of colonization and radiation in island faunas is often hindered by past human-caused extinctions. The insular Caribbean is one of the only complex oceanic-type island systems colonized by land mammals, but has witnessed the globally highest level of mammalian extinction during the Holocene. Using ancient DNA analysis, we reconstruct the evolutionary history of one of the Caribbean's now-extinct major mammal groups, the insular radiation of oryzomyine rice rats. Despite the significant problems of recovering DNA from prehistoric tropical archaeological material, it was possible to identify two discrete Late Miocene colonizations of the main Lesser Antillean island chain from mainland South America by oryzomyine lineages that were only distantly related. A high level of phylogenetic diversification was observed within oryzomyines across the Lesser Antilles, even between allopatric populations on the same island bank. The timing of oryzomyine colonization is closely similar to the age of several other Caribbean vertebrate taxa, suggesting that geomorphological conditions during the Late Miocene facilitated broadly simultaneous overwater waif dispersal of many South American lineages to the Lesser Antilles. These data provide an important baseline by which to further develop the Caribbean as a unique workshop for studying island evolution. The Royal Society 2015-05-22 /pmc/articles/PMC4424637/ /pubmed/25904660 http://dx.doi.org/10.1098/rspb.2014.2371 Text en http://creativecommons.org/licenses/by/4.0/ © 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Research Articles Brace, Selina Turvey, Samuel T. Weksler, Marcelo Hoogland, Menno L. P. Barnes, Ian Unexpected evolutionary diversity in a recently extinct Caribbean mammal radiation |
title | Unexpected evolutionary diversity in a recently extinct Caribbean mammal radiation |
title_full | Unexpected evolutionary diversity in a recently extinct Caribbean mammal radiation |
title_fullStr | Unexpected evolutionary diversity in a recently extinct Caribbean mammal radiation |
title_full_unstemmed | Unexpected evolutionary diversity in a recently extinct Caribbean mammal radiation |
title_short | Unexpected evolutionary diversity in a recently extinct Caribbean mammal radiation |
title_sort | unexpected evolutionary diversity in a recently extinct caribbean mammal radiation |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4424637/ https://www.ncbi.nlm.nih.gov/pubmed/25904660 http://dx.doi.org/10.1098/rspb.2014.2371 |
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