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

dc.contributor.authorSithaldeen, Riashnaen_ZA
dc.contributor.authorAckermann, Rebecca Rogersen_ZA
dc.contributor.authorBishop, Jacqueline Men_ZA
dc.date.accessioned2015-11-16T04:12:04Z
dc.date.available2015-11-16T04:12:04Z
dc.date.issued2015en_ZA
dc.description.abstractPlio-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.identifier.apacitationSithaldeen, R., Ackermann, R. R., & Bishop, J. M. (2015). Pleistocene aridification cycles shaped the contemporary genetic architecture of southern african baboons. <i>PLoS One</i>, http://hdl.handle.net/11427/15024en_ZA
dc.identifier.chicagocitationSithaldeen, Riashna, Rebecca Rogers Ackermann, and Jacqueline M Bishop "Pleistocene aridification cycles shaped the contemporary genetic architecture of southern african baboons." <i>PLoS One</i> (2015) http://hdl.handle.net/11427/15024en_ZA
dc.identifier.citationSithaldeen, 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.0123207en_ZA
dc.identifier.ris TY - Journal Article AU - Sithaldeen, Riashna AU - Ackermann, Rebecca Rogers AU - Bishop, Jacqueline M AB - 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. DA - 2015 DB - OpenUCT DO - 10.1371/journal.pone.0123207 DP - University of Cape Town J1 - PLoS One LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 T1 - Pleistocene aridification cycles shaped the contemporary genetic architecture of southern african baboons TI - Pleistocene aridification cycles shaped the contemporary genetic architecture of southern african baboons UR - http://hdl.handle.net/11427/15024 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/15024
dc.identifier.urihttp://dx.doi.org/10.1371/journal.pone.0123207
dc.identifier.vancouvercitationSithaldeen R, Ackermann RR, Bishop JM. Pleistocene aridification cycles shaped the contemporary genetic architecture of southern african baboons. PLoS One. 2015; http://hdl.handle.net/11427/15024.en_ZA
dc.language.isoengen_ZA
dc.publisherPublic Library of Scienceen_ZA
dc.publisher.departmentDepartment of Archaeologyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rightsThis 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.holder© 2015 Sithaldeen et alen_ZA
dc.rights.urihttp://creativecommons.org/licenses/by/4.0en_ZA
dc.sourcePLoS Oneen_ZA
dc.source.urihttp://journals.plos.org/plosoneen_ZA
dc.subject.otherPhylogeographyen_ZA
dc.subject.otherPaleogeneticsen_ZA
dc.subject.otherAfricaen_ZA
dc.subject.otherPleistocene epochen_ZA
dc.subject.otherPaleoclimatologyen_ZA
dc.subject.otherDemographyen_ZA
dc.subject.otherSequence alignmenten_ZA
dc.titlePleistocene aridification cycles shaped the contemporary genetic architecture of southern african baboonsen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Sithaldeen_Pleistocene_Aridification_Cycles_2015.pdf
Size:
17.78 MB
Format:
Adobe Portable Document Format
Description:
Collections