Data from: Pleistocene speciation in the genus Populus (Salicaceae)

Nicholas D. Levsen, Peter Tiffin & Matthew S. Olson
The macro-evolutionary consequences of recent climate change remain controversial and there is little paleobotanical or morphological evidence that Pleistocene (1.8-0.12 Ma) glacial cycles acted as drivers of speciation, especially among lineages with long generation times, such as trees. We combined genetic and ecogeographic data from two closely related North American tree species, Populus balsamifera and P. trichocarpa (Salicacaeae) to determine if their divergence coincided with and was possibly caused by Pleistocene climatic events. We analyzed...
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