Evolutionary diversification of the lizard genus Bassiana (Scincidae) across Southern Australia.

Détails

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Etat: Public
Version: de l'auteur
ID Serval
serval:BIB_7D6354EC6FC6
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Evolutionary diversification of the lizard genus Bassiana (Scincidae) across Southern Australia.
Périodique
Plos One
Auteur(s)
Dubey S., Shine R.
ISSN
1932-6203 (Electronic)
ISSN-L
1932-6203
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
5
Numéro
9
Pages
e12982
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Résumé
BACKGROUND: Relatively recent (Plio-Pleistocene) climatic variations had strong impacts on the fauna and flora of temperate-zone North America and Europe; genetic analyses suggest that many lineages were restricted to unglaciated refuges during this time, and have expanded their ranges since then. Temperate-zone Australia experienced less severe glaciation, suggesting that patterns of genetic structure among species may reflect older (aridity-driven) divergence events rather than Plio-Pleistocene (thermally-mediated) divergences. The lizard genus Bassiana (Squamata, Scincidae) contains three species that occur across a wide area of southern Australia (including Tasmania), rendering them ideally-suited to studies on the impact of past climatic fluctuations.
METHODOLOGY/PRINCIPAL FINDINGS: We performed molecular phylogenetic and dating analyses using two partial mitochondrial genes (ND2 and ND4) of 97 samples of Bassiana spp. Our results reveal a pattern of diversification beginning in the Middle Miocene, with intraspecific diversification arising from 5.7 to 1.7 million years ago in the Upper Miocene-Lower Pleistocene.
CONCLUSIONS/SIGNIFICANCE: In contrast to the temperate-zone Northern Hemisphere biota, patterns of evolutionary diversification within southern Australian taxa appear to reflect geologically ancient events, mostly relating to east-west discontinuities imposed by aridity rather than (as is the case in Europe and North America) relatively recent recolonisation of northern regions from unglaciated refugia to the south.
Mots-clé
Animals, Australia, Biodiversity, Evolution, Molecular, Lizards/classification, Lizards/genetics, Mitochondrial Proteins/genetics, Molecular Sequence Data, Phylogeny
Pubmed
Web of science
Open Access
Oui
Création de la notice
18/10/2011 12:15
Dernière modification de la notice
20/08/2019 14:38
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