Show simple item record

dc.contributor.authorMoura, A.
dc.contributor.authorNielsen, S.
dc.contributor.authorVilstrup, J.
dc.contributor.authorMoreno-Mayar, V.
dc.contributor.authorGilbert, Thomas
dc.contributor.authorGray, H.
dc.contributor.authorNatoli, A.
dc.contributor.authorMoller, L.
dc.contributor.authorRus Hoelzel, A.
dc.date.accessioned2017-01-30T12:15:48Z
dc.date.available2017-01-30T12:15:48Z
dc.date.created2014-11-19T01:13:41Z
dc.date.issued2013
dc.identifier.citationMoura, A. and Nielsen, S. and Vilstrup, J. and Moreno-Mayar, V. and Gilbert, T. and Gray, H. and Natoli, A. et al. 2013. Recent Diversification of a Marine Genus (Tursiops spp.) Tracks Habitat Preference and Environmental Change. Systematic Biology. 62 (6): pp. 865-877.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/19798
dc.description.abstract

Understanding the evolution of diversity and the resulting systematics in marine systems is confounded by the lack of clear boundaries in oceanic habitats, especially for highly mobile species like marine mammals. Dolphin populations and sibling species often show differentiation between coastal and offshore habitats, similar to the pelagic/littoral or benthic differentiation seen for some species of fish. Here we test the hypothesis that lineages within the polytypic genus Tursiops track past changes in the environment reflecting ecological drivers of evolution facilitated by habitat release. We used a known recent time point for calibration (the opening of the Bosphorus) and whole mitochondrial genome (mitogenome) sequences for high phylogenetic resolution. The pattern of lineage formation suggested an origin in Australasia and several early divisions involving forms currently inhabiting coastal habitats. Radiation in pelagic environments was relatively recent, and was likely followed by a return to coastal habitat in some regions. The timing of some nodes defining different ecotypes within the genus clustered near the two most recent interglacial transitions. A signal for an increase in diversification was also seen for dates after the last glacial maximum. Together these data suggest the tracking of habitat preference during geographic expansions, followed by transition points reflecting habitat shifts, which were likely associated with periods of environmental change. [Climatic oscillations; marine mammal; pleistocene; radiation; speciation.]

dc.publisherOxford University Press
dc.relation.urihttp://sysbio.oxfordjournals.org/content/62/6/865.short
dc.titleRecent Diversification of a Marine Genus (Tursiops spp.) Tracks Habitat Preference and Environmental Change
dc.typeJournal Article
dcterms.source.volume62
dcterms.source.number6
dcterms.source.startPage865
dcterms.source.endPage877
dcterms.source.issn1063-5157
dcterms.source.titleSystematic Biology
curtin.accessStatusFulltext not available


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record