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Ecological Niche Conservatism and Pleistocene Refugia in the Thrush-Like Mourner, Schiffornis sp., in the Neotropics
A. Townsend Peterson and Árpád S. Nyári
Vol. 62, No. 1 (Jan., 2008), pp. 173-183
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/4627125
Page Count: 11
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Recent studies have increasingly implicated deep (pre-Pleistocene) events as key in the vertebrate speciation, downplaying the importance of more recent (Pleistocene) climatic shifts. This work, however, has beeri based almost exclusively on evidence from molecular clock inferences of splitting dates. We present an independent perspective on this question, using ecological niche model reconstructions of Pleistocene Last Glacial Maximum (LGM) potential distributions for the Thrush-like Mourner (Schiffornis turdina) complex in the neotropics. LGM distributional patterns reconstructed from the niche models relate significantly to phylogroups identified in previous molecular systematic analyses. As such, patterns of differentiation and speciation in this complex are consistent with Pleistocene climate and geography, although further testing will be necessary to establish dates of origin firmly and unambiguously.
Evolution © 2008 Society for the Study of Evolution