A multilocus perspective on refugial isolation and divergence in rainforest skinks (Carlia)

Dolman, G. and Moritz, C. (2006) A multilocus perspective on refugial isolation and divergence in rainforest skinks (Carlia). Evolution, 60 3: 573-582. doi:10.1554/05-487.1


Author Dolman, G.
Moritz, C.
Title A multilocus perspective on refugial isolation and divergence in rainforest skinks (Carlia)
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
Publication date 2006-03
Sub-type Article (original research)
DOI 10.1554/05-487.1
Volume 60
Issue 3
Start page 573
End page 582
Total pages 10
Place of publication Lawrence
Publisher Soc Study Evolution
Collection year 2006
Language eng
Subject C1
270203 Population and Ecological Genetics
780105 Biological sciences
Abstract To explore the evolutionary consequences of climate-induced fluctuations in distribution of rainforest habitat we contrasted demographic histories of divergence among three lineages of Australian rainforest endemic skinks. The red-throated rainbow skink, Carlia rubrigularis, consists of morphologically indistinguishable northern and southern mitochondrial DNA (mtDNA) lineages that are partially reproductively isolated at their parapatric boundary. The third lineage (C. rhomboidalis) inhabits rainforests just to the south of C. rubrigularis, has blue, rather than red-throated males, and for mtDNA is more closely related to southern C. rubrigularis than is northern C. rubrigularis. Multigene coalescent analyses supported more recent divergence between morphologically distinct lineages than between morphologically conservative lineages. There was effectively no migration and therefore stronger isolation between southern C. rubrigularis and C. rhomboidalis, and low unidirectional migration between morphologically conservative lineages of C. rubrigularis. We found little or no evidence for strong differences in effective population size, and hence different contributions of genetic drift in the demographic history of the three lineages. Overall the results suggest contrasting responses to long-term fluctuations in rainforest habitats, leading to varying opportunities for speciation.
Keyword Coalescence
Demographic History
Phylogeography
Speciation
Ecology
Evolutionary Biology
Genetics & Heredity
Australia Wet Tropics
Comparative Phylogeography
Gene Genealogies
Dna
Population
History
Coalescent
Evolution
Models
Q-Index Code C1

 
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