Low Phylogeographic Structure in a Wide Spread Endangered Australian Frog <Emphasis Type="Italic">Litoria aurea</Emphasis> (Anura: Hylidae) |
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Authors: | Emma L Burns Mark D B Eldridge Darren M Crayn Bronwyn A Houlden |
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Institution: | (1) School of Biological, Earth and Environmental Sciences, University of New South Wales, Randwick, Sydney, NSW, 2052, Australia;(2) Department of Biological Sciences, Macquarie University, Randwick, Sydney, NSW, 2109, Australia;(3) Evolutionary Biology Unit, Australian Museum, 6 College St, Sydney, NSW, 2010, Australia;(4) National Herbarium of New South Wales, Botanic Gardens Trust, Mrs Macquaries Road, Sydney, 2000, Australia;(5) Zoological Parks Board of NSW, 20, Mosman, 2088, Australia;(6) Park Avenue Suites, Apartment 606, Jl. RS. Aini. Karet Setiabudi, Jakarta, 12920, Indonesia |
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Abstract: | The green and golden bell frog (Litoria aurea) has a widespread distribution along the south-east coast of Australia. The species range, however, is highly fragmented
and remaining populations are predominately isolated and restricted to the coastline. Previously, the range extended further
inland and the species was considered common. Here we report a study designed to identify the phylogeographic and conservation
genetic parameters of L. aurea. Mitochondrial DNA sequences were examined from 263 individuals sampled from 26 locations using both phylogenetic and population
analyses. Despite a general consensus that amphibians are highly structured we found no phylogeographic divisions within the
species, however, there was significant structure amongst extant populations (F
ST=0.385). Patterns of haplotype relatedness, high haplotypic diversity (mean h=0.547) relative to low nucleotide diversity (mean π=0.003) and mismatch distribution analysis supported a Pleistocene expansion
hypothesis with continued restricted dispersal and gene flow. We conclude that the genetic structure of the species may permit
‘well managed’ intervention to mediate gene flow amongst isolated populations and provide some guidelines for the implementation
of such conservation strategies. |
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Keywords: | mtDNA Phylogeography Population structure Amphibian Hylid Litoria aurea |
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