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Ancient DNA reveals genetic stability despite demographic decline: 3,000 years of population history in the endemic Hawaiian petrel

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dc.contributor.author Welch, Andreanna J. en
dc.contributor.author Wiley, Anne E. en
dc.contributor.author James, Helen F. en
dc.contributor.author Ostrom, Peggy H. en
dc.contributor.author Stafford, Thomas W. en
dc.contributor.author Fleischer, Robert C. en
dc.date.accessioned 2016-10-26T23:23:37Z
dc.date.available 2016-10-26T23:23:37Z
dc.date.issued 2012
dc.identifier.citation Welch, Andreanna J., Wiley, Anne E., James, Helen F., Ostrom, Peggy H., Stafford, Thomas W., and Fleischer, Robert C. 2012. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F29776">Ancient DNA reveals genetic stability despite demographic decline: 3,000 years of population history in the endemic Hawaiian petrel</a>." <em>Molecular biology and evolution</em>. 29 (12):3729&ndash;3740. <a href="https://doi.org/10.1093/molbev/mss185">https://doi.org/10.1093/molbev/mss185</a> en
dc.identifier.issn 0737-4038
dc.identifier.uri https://hdl.handle.net/10088/29776
dc.description.abstract In the Hawaiian Islands human colonization, which began approximately 1200 to 800 years ago, marks the beginning of a period in which nearly 75% of the endemic avifauna became extinct and the population size and range of many additional species declined. It remains unclear why some species persisted while others did not. The endemic Hawaiian petrel (Pterodroma sandwichensis) has escaped extinction, but colonies on two islands have been extirpated and populations on remaining islands have contracted. We obtained mitochondrial DNA sequences from 100 subfossil bones, 28 museum specimens, and 289 modern samples to investigate patterns of gene flow and temporal changes in the genetic diversity of this endangered species over the last 3, 000 years, as Polynesians and then Europeans colonized the Hawaiian Islands. Genetic differentiation was found to be high between both modern and ancient petrel populations. However, gene flow was substantial between the extirpated colonies on Oahu and Molokai and modern birds from the island of Lanai. No significant reductions in genetic diversity occurred over this period, despite fears in the mid-1900 s that this species may have been extinct. Simulations show that even a decline to a stable effective population size of 100 individuals would result in the loss of only 5% of the expected heterozygosity. Simulations also show that high levels of genetic diversity may be retained due to the long generation time of this species. Such decoupling between population size and genetic diversity in long-lived species can have important conservation implications. It appears that a pattern of dispersal from declining colonies, in addition to long generation time, may have allowed the Hawaiian petrel to escape a severe genetic bottleneck, and the associated extinction vortex, and persist despite a large population decline after human colonization. en
dc.relation.ispartof Molecular biology and evolution en
dc.title Ancient DNA reveals genetic stability despite demographic decline: 3,000 years of population history in the endemic Hawaiian petrel en
dc.type Journal Article en
dc.identifier.srbnumber 112285
dc.identifier.doi 10.1093/molbev/mss185
rft.jtitle Molecular biology and evolution
rft.volume 29
rft.issue 12
rft.spage 3729
rft.epage 3740
dc.description.SIUnit NH-Vertebrate Zoology en
dc.description.SIUnit NMNH en
dc.description.SIUnit NZP en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 3729
dc.citation.epage 3740


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