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Lee Ann Rollins, Nina Svedin, Sarah R. Pryke and Simon C. Griffith The role of the Ord Arid Intrusion in the historical and contemporary genetic division of long-tailed finch subspecies in northern Australia Ecology and Evolution 2

Version of Record online: 15 MAY 2012 | DOI: 10.1002/ece3.259

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Evidence from many taxa distributed across northern Australia indicates that the Ord Arid Intrusion has acted as an agent of vicariance. It has been suggested that subspecies of the long-tailed finch (Poephila acuticauda) arose as a result of this historical biogeographic barrier. Using mitochondrial sequence data and samples taken across the range of this species, we test this hypothesis. Further, changes to climate since the last glacial maximum have resulted in a reconnection of habitat on either side of this historical biogeographic barrier. We also estimate levels of contemporary gene flow within this species complex using microsatellite data to determine if genetic mixing between subspecies has occurred following secondary contact.

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