Concordance in phylogeography and ecological niche modelling identify dispersal corridors for reptiles in arid Australia

Melville, Jane, Haines, Margaret L, Hale, Joshua, Chapple, Stephanie and Ritchie, Euan 2016, Concordance in phylogeography and ecological niche modelling identify dispersal corridors for reptiles in arid Australia, Journal of biogeography, vol. 43, no. 9, pp. 1844-1855, doi: 10.1111/jbi.12739.

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Title Concordance in phylogeography and ecological niche modelling identify dispersal corridors for reptiles in arid Australia
Author(s) Melville, Jane
Haines, Margaret L
Hale, Joshua
Chapple, Stephanie
Ritchie, EuanORCID iD for Ritchie, Euan
Journal name Journal of biogeography
Volume number 43
Issue number 9
Start page 1844
End page 1855
Total pages 12
Publisher Wiley
Place of publication Chichester, Eng
Publication date 2016-06-10
ISSN 1365-2699
Keyword(s) Agamidae,
Ctenophorus caudicinctus
desert lizards
dispersal corridors,
Summary Aim: Using the rock-specialist agamid Ctenophorus caudicinctus as a model, we test hypothesized biogeographical dispersal corridors for lizards in the Australian arid zone (across the western sand deserts), and assess how these dispersal routes have shaped phylogeographical structuring. Location: Arid and semi-arid Australia. Methods: We sequenced a c. 1400 bp fragment of mtDNA (ND2) for 134 individuals of C. caudicinctus as well as a subset of each of the mtDNA clades for five nuclear loci (BDNF, BACH1, GAPD, NTF3, and PRLR). We used phylogenetic methods to assess biogeographical patterns within C. caudicinctus, including relaxed molecular clock analyses to estimate divergence times. Ecological niche modelling (Maxent) was employed to estimate the current distribution of suitable climatic envelopes for each lineage. Results: Phylogenetic analyses identified two deeply divergent mtDNA clades within C. caudicinctus - an eastern and western clade - separated by the Western Australian sand deserts. However, divergences pre-date the Pleistocene sand deserts. Phylogenetic analyses of the nuclear DNA data sets generally support major mtDNA clades, suggesting past connections between the western C. c. caudicinctus populations in far eastern Pilbara (EP) and the lineages to the east of the sand deserts. Ecological niche modelling supports the continued suitability of climatic conditions between the Central Ranges and the far EP for C. c. graafi. Main conclusions: Estimates of lineage ages provide evidence of divergence between eastern and western clades during the Miocene with subsequent secondary contact during the Pliocene. Our results suggest that this secondary contact occurred via dispersal between the Central Ranges and the far EP, rather than the more southerly Giles Corridor. These events precede the origins of the western sand deserts and divergence patterns instead appear associated with Miocene and Pliocene climate change.
Language eng
DOI 10.1111/jbi.12739
Field of Research 050104 Landscape Ecology
060302 Biogeography and Phylogeography
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Wiley
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