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Mark D. B. Eldridge, Sally Potter, Christopher N. Johnson and Euan G. Ritchie Differing impact of a major biogeographic barrier on genetic structure in two large kangaroos from the monsoon tropics of Northern Australia Ecology and Evolution 4

Version of Record online: 28 JAN 2014 | DOI: 10.1002/ece3.954

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We determined variation in the mitochondrial DNA control region and at microsatellite loci to assess the historical and contemporary influence of the Carpentarian Barrier in Northern Australia on gene flow in two closely related, sympatric, large, vagile marsupials. Surprisingly we detected only limited differentiation between the disjunct populations of the antilopine wallaroo but the continuously distributed common wallaroo was highly divergent across the Carpentarian Barrier. Although unexpected, these contrasting responses appear related to minor differences in species ecology. Our results suggest that vicariance may not explain well the phylogeographic patterns in Australia's dynamic monsoonal environments.

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