Postglacial colonization of northern coastal habitat by bottlenose dolphins: A marine leading-edge expansion?

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dc.contributor.authorNykänen, Milaja
dc.contributor.authorKaschner, Kristin
dc.contributor.authorDabin, Willy
dc.contributor.authorBrownlow, Andrew
dc.contributor.authorDavison, Nicholas J.
dc.contributor.authorDeaville, Rob
dc.contributor.authorGarilao, Cristina
dc.contributor.authorKesner-Reyes, Kathleen
dc.contributor.authorGilbert, M. Thomas P.
dc.contributor.authorPenrose, Rod
dc.contributor.authorIslas-Villanueva, Valentina
dc.contributor.authorWales, Nathan
dc.contributor.authorIngram, Simon N.
dc.contributor.authorRogan, Emer
dc.contributor.authorLouis, Marie
dc.contributor.authorFoote, Andrew D.
dc.contributor.funderUniversity College Corken
dc.contributor.funderDepartment for Culture, Heritage and the Gaeltacht, Irelanden
dc.contributor.funderFondation Fyssenen
dc.contributor.funderTotal Foundationen
dc.contributor.funderAgence de l’Eau Seine-Normandie, Franceen
dc.contributor.funderFonds de Dotation pour la Biodiversité, Franceen
dc.contributor.funderAgence des Aires Marines Protégéesen
dc.contributor.funderCommunauté d’Agglomération de la Ville de La Rochelle, Franceen
dc.contributor.funderDirection Régionale de l’Environnement, de l’Aménagement et du Logement, Franceen
dc.contributor.funderMinistère de l’Ecologie, du Développement Durable et de l’Energie, Franceen
dc.contributor.funderConseil Départemental de la Mancheen
dc.contributor.funderNational Parks and Wildlife Serviceen
dc.date.accessioned2021-09-24T08:45:04Z
dc.date.available2021-09-24T08:45:04Z
dc.date.issued2019-06-17
dc.date.updated2021-09-23T14:25:41Z
dc.description.abstractOscillations in the Earth's temperature and the subsequent retreating and advancing of ice-sheets around the polar regions are thought to have played an important role in shaping the distribution and genetic structuring of contemporary high-latitude populations. After the Last Glacial Maximum (LGM), retreating of the ice-sheets would have enabled early colonizers to rapidly occupy suitable niches to the exclusion of other conspecifics, thereby reducing genetic diversity at the leading-edge. Bottlenose dolphins (genus Tursiops) form distinct coastal and pelagic ecotypes, with finer-scale genetic structuring observed within each ecotype. We reconstruct the postglacial colonization of the Northeast Atlantic (NEA) by bottlenose dolphins using habitat modeling and phylogenetics. The AquaMaps model hindcasted suitable habitat for the LGM in the Atlantic lower latitude waters and parts of the Mediterranean Sea. The time-calibrated phylogeny, constructed with 86 complete mitochondrial genomes including 30 generated for this study and created using a multispecies coalescent model, suggests that the expansion to the available coastal habitat in the NEA happened via founder events starting ~15 000 years ago (95% highest posterior density interval: 4 900-26 400). The founders of the 2 distinct coastal NEA populations comprised as few as 2 maternal lineages that originated from the pelagic population. The low effective population size and genetic diversity estimated for the shared ancestral coastal population subsequent to divergence from the pelagic source population are consistent with leading-edge expansion. These findings highlight the legacy of the Late Pleistocene glacial cycles on the genetic structuring and diversity of contemporary populations.en
dc.description.sponsorshipUniversity College Cork (Thomas Crawford Hayes Scholarship);en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationNykänen, M., Kaschner, K., Dabin, W., Brownlow, A., Davison, N. J., Deaville, R., Garilao, C., Kesner-Reyes, K., Gilbert, M. T. P., Penrose, R., Islas-Villanueva, V., Wales, N., Ingram, S. N., Rogan, E., Louis, M. and Foote, A. D. (2019) 'Postglacial colonization of northern coastal habitat by bottlenose dolphins: A marine leading-edge expansion?, Journal of Heredity, 110(6), pp. 662-674. doi: 10.1093/jhered/esz039en
dc.identifier.doi10.1093/jhered/esz039en
dc.identifier.eissn1465-7333
dc.identifier.endpage674en
dc.identifier.issn0022-1503
dc.identifier.issued6en
dc.identifier.journaltitleJournal of Heredityen
dc.identifier.startpage662en
dc.identifier.urihttps://hdl.handle.net/10468/11998
dc.identifier.volume110en
dc.language.isoenen
dc.publisherOxford University Pressen
dc.rights© 2019, The American Genetic Association. All rights reserved.en
dc.subjectGenetic diversityen
dc.subjectHabitat modelingen
dc.subjectLast Glacial Maximum (LGM)en
dc.subjectMultispecies coalescenten
dc.subjectPhylogeneticsen
dc.subjectTime-dependencyen
dc.titlePostglacial colonization of northern coastal habitat by bottlenose dolphins: A marine leading-edge expansion?en
dc.typeArticle (peer-reviewed)en
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