Comparative multi-locus phylogeography confirms multiple vicariance events in co-distributed rainforest frogs

Bell, Rayna C., Mackenzie, Jason B., Hickerson, Michael J., Chavarría, Krystle L., Cunningham, Michael, Williams, Stephen, and Moritz, Craig (2012) Comparative multi-locus phylogeography confirms multiple vicariance events in co-distributed rainforest frogs. Proceedings of the Royal Society of London Series B, Biological Sciences, 279 (1730). pp. 991-999.

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Abstract

Though Pleistocene refugia are frequently cited as drivers of species diversification, comparisons of molecular divergence among sister species typically indicate a continuum of divergence times from the Late Miocene, rather than a clear pulse of speciation events at the Last Glacial Maximum. Community-scale inference methods that explicitly test for multiple vicariance events, and account for differences in ancestral effective population size and gene flow, are well suited for detecting heterogeneity of species' responses to past climate fluctuations. We apply this approach to multi-locus sequence data from five co-distributed frog species endemic to the Wet Tropics rainforests of northeast Australia. Our results demonstrate at least two episodes of vicariance owing to climate-driven forest contractions: one in the Early Pleistocene and the other considerably older. Understanding how repeated cycles of rainforest contraction and expansion differentially affected lineage divergence among co-distributed species provides a framework for identifying evolutionary processes that underlie population divergence and speciation.

Item ID: 21037
Item Type: Article (Refereed Research - C1)
Keywords: community phylogeography; lineage divergence; Litoria; Australia Wet Tropics
ISSN: 1471-2954
Date Deposited: 10 Apr 2012 04:59
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 50%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060302 Biogeography and Phylogeography @ 50%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960805 Flora, Fauna and Biodiversity at Regional or Larger Scales @ 100%
Citation Count from Web of Science Web of Science 2
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