Diversification patterns of pebble-mimic dragons are consistent with historical disruption of important habitat corridors in arid Australia

Shoo, L.P., Rose, R., Doughty, P., Austin, J.J., and Melville, J. (2008) Diversification patterns of pebble-mimic dragons are consistent with historical disruption of important habitat corridors in arid Australia. Molecular Phylogenetics and Evolution, 48 (2). pp. 528-542.

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Abstract

The pebble-mimic dragon lineage of Tympanocryptis is widely distributed in the stony, or ‘gibber’, deserts of Australia but is noticeably absent from intersecting areas of sand deserts. Past fluctuations in the extent and configuration of sandy desert habitat barriers are likely to have been an import factor promoting genetic differentiation in this group. We sequenced a 1400 bp region of mitochondrial DNA and a 1400 bp nuclear gene (RAG-1) to investigate phylogeographic structuring of species of pebble-mimic dragons. Our topology indicates an early split in this lineage between eastern and western parts of the arid zone that probably dates to the mid-Miocene. This split corresponds directly with large expanses of contemporary sandy habitat in the form of Great Sandy and Great Victoria Deserts. Our data indicate that this biogeographic barrier established very early on in the development of the arid zone and has persisted to present. Additional genetic structuring in the absence of recognized barriers suggests that an expanded view of potential habitat barriers in the arid zone is required.

Item ID: 9178
Item Type: Article (Refereed Research - C1)
Keywords: Agamidae, deserts, historical biogeography, molecular systematics, phylogeography, pilbara, sandplain, dispersal corridors, taxonomy, arid zone
ISSN: 1095-9513
Date Deposited: 14 Apr 2010 02:21
FoR Codes: 06 BIOLOGICAL SCIENCES > 0604 Genetics > 060411 Population, Ecological and Evolutionary Genetics @ 50%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060399 Evolutionary Biology not elsewhere classified @ 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 30
Downloads: Total: 2
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