An ancient divide in a contiguous rainforest: endemic earthworms in the Australian wet tropics

Moreau, Corrie S., Hugall, Andrew F., McDonald, Keith R., Jamieson, Barrie G. M. and Moritz, Craig (2015) An ancient divide in a contiguous rainforest: endemic earthworms in the Australian wet tropics. PLoS One, 10 9: . doi:10.1371/journal.pone.0136943


Author Moreau, Corrie S.
Hugall, Andrew F.
McDonald, Keith R.
Jamieson, Barrie G. M.
Moritz, Craig
Title An ancient divide in a contiguous rainforest: endemic earthworms in the Australian wet tropics
Journal name PLoS One   Check publisher's open access policy
ISSN 1932-6203
Publication date 2015-09
Sub-type Article (original research)
DOI 10.1371/journal.pone.0136943
Open Access Status DOI
Volume 10
Issue 9
Total pages 15
Place of publication San Francisco, CA, United States
Publisher Public Library of Science
Collection year 2016
Language eng
Formatted abstract
Understanding the factors that shape current species diversity is a fundamental aim of ecology and evolutionary biology. The Australian Wet Tropics (AWT) are a system in which much is known about how the rainforests and the rainforest-dependent organisms reacted to late Pleistocene climate changes, but less is known about how events deeper in time shaped speciation and extinction in this highly endemic biota. We estimate the phylogeny of a species-rich endemic genus of earthworms (Terrisswalkerius) from the region. Using DEC and DIVA historical biogeography methods we find a strong signal of vicariance among known biogeographical sub-regions across the whole phylogeny, congruent with the phylogeography of less diverse vertebrate groups. Absolute dating estimates, in conjunction with relative ages of major biogeographic disjunctions across Australia, indicate that diversification in Terrisswalkerius dates back before the mid-Miocene shift towards aridification, into the Paleogene era of isolation of mesothermal Gondwanan Australia. For the Queensland endemic Terrisswalkerius earthworms, the AWT have acted as both a museum of biological diversity and as the setting for continuing geographically structured diversification. These results suggest that past events affecting organismal diversification can be concordant across phylogeographic to phylogenetic levels and emphasize the value of multi-scale analysis, from intra- to interspecies, for understanding the broad-scale processes that have shaped geographic diversity.
Keyword Comparative phylogeography
Historical biogeography
Molecular phylogeny
Mitochondrial-dna
Geographic range
Climate-change
Diversity
Evolution
Speciation
Dynamics
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biological Sciences Publications
 
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