10.5061/DRYAD.K501D
Moura, Andre E.
Durham University
Nielsen, Sandra C. A.
Durham University
Vilstrup, Julia T.
Durham University
Moreno-Mayar, Jose Victor
Durham University
Gilbert, Marcus Thomas P.
Durham University
Gray, Howard
Natural History Museum
Natoli, Ada
Durham University
Möller, Luciana
Durham University
Hoelzel, Alan Rus
Durham University
Gray, Howard W. I.
Durham University
Data from: Recent diversification of a marine genus (Tursiops spp.) tracks
habitat preference and environmental change
Dryad
dataset
2013
Tursiops
climate oscillations
marine mammal
2013-08-07T18:44:59Z
2013-08-07T18:44:59Z
en
https://doi.org/10.1093/sysbio/syt051
3764736 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
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.
Moura et al supplementary file 14Jul13online supplement