Pleistocene aridification cycles shaped the contemporary genetic architecture of southern african baboons

 

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dc.contributor.author Sithaldeen, Riashna en_ZA
dc.contributor.author Ackermann, Rebecca Rogers en_ZA
dc.contributor.author Bishop, Jacqueline M en_ZA
dc.date.accessioned 2015-11-16T04:12:04Z
dc.date.available 2015-11-16T04:12:04Z
dc.date.issued 2015 en_ZA
dc.identifier.citation Sithaldeen, R., Ackermann, R. R., & Bishop, J. M. (2014). Pleistocene aridification cycles shaped the contemporary genetic architecture of southern african baboons. PloS one, 10(5), e0123207. doi:10.1371/journal.pone.0123207 en_ZA
dc.identifier.uri http://hdl.handle.net/11427/15024
dc.identifier.uri http://dx.doi.org/10.1371/journal.pone.0123207
dc.description.abstract Plio-Pleistocene environmental change influenced the evolutionary history of many animal lineages in Africa, highlighting key roles for both climate and tectonics in the evolution of Africa’s faunal diversity. Here, we explore diversification in the southern African chacma baboon Papio ursinus sensu lato and reveal a dominant role for increasingly arid landscapes during past glacial cycles in shaping contemporary genetic structure. Recent work on baboons ( Papio spp.) supports complex lineage structuring with a dominant pulse of diversification occurring 1-2Ma, and yet the link to palaeoenvironmental change remains largely untested. Phylogeographic reconstruction based on mitochondrial DNA sequence data supports a scenario where chacma baboon populations were likely restricted to refugia during periods of regional cooling and drying through the Late Pleistocene. The two lineages of chacma baboon, ursinus and griseipes , are strongly geographically structured, and demographic reconstruction together with spatial analysis of genetic variation point to possible climate-driven isolating events where baboons may have retreated to more optimum conditions during cooler, drier periods. Our analysis highlights a period of continuous population growth beginning in the Middle to Late Pleistocene in both the ursinus and the PG2 griseipes lineages. All three clades identified in the study then enter a state of declining population size (Ne f ) through to the Holocene; this is particularly marked in the last 20,000 years, most likely coincident with the Last Glacial Maximum. The pattern recovered here conforms to expectations based on the dynamic regional climate trends in southern Africa through the Pleistocene and provides further support for complex patterns of diversification in the region’s biodiversity. en_ZA
dc.language.iso eng en_ZA
dc.publisher Public Library of Science en_ZA
dc.rights This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. en_ZA
dc.rights.uri http://creativecommons.org/licenses/by/4.0 en_ZA
dc.source PLoS One en_ZA
dc.source.uri http://journals.plos.org/plosone en_ZA
dc.subject.other Phylogeography en_ZA
dc.subject.other Paleogenetics en_ZA
dc.subject.other Africa en_ZA
dc.subject.other Pleistocene epoch en_ZA
dc.subject.other Paleoclimatology en_ZA
dc.subject.other Demography en_ZA
dc.subject.other Sequence alignment en_ZA
dc.title Pleistocene aridification cycles shaped the contemporary genetic architecture of southern african baboons en_ZA
dc.type Journal Article en_ZA
dc.rights.holder © 2015 Sithaldeen et al en_ZA
uct.type.publication Research en_ZA
uct.type.resource Article en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Archaeology en_ZA
uct.type.filetype Text
uct.type.filetype Image


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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Except where otherwise noted, this item's license is described as This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.