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Ashman LG, Bragg JG, Doughty P, et al. Diversification across biomes in a continental lizard radiation. Evolution. 2018;doi: 10.1111/evo.13541.
Ashman, L. G., Bragg, J. G., Doughty, P., Hutchinson, M. N., Bank, S., Matzke, N. J., Oliver, P., & Moritz, C. (2018). Diversification across biomes in a continental lizard radiation. Evolution; international journal of organic evolution, . https://doi.org/10.1111/evo.13541
Ashman, L G, et al. "Diversification across biomes in a continental lizard radiation." Evolution; international journal of organic evolution vol. (2018). doi: https://doi.org/10.1111/evo.13541
Ashman LG, Bragg JG, Doughty P, Hutchinson MN, Bank S, Matzke NJ, Oliver P, Moritz C. Diversification across biomes in a continental lizard radiation. Evolution. 2018 Jul 04; doi: 10.1111/evo.13541. Epub 2018 Jul 04. PMID: 29972238.
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Evolution. 2018 Jul 04; doi: 10.1111/evo.13541. Epub 2018 Jul 04.

Diversification across biomes in a continental lizard radiation.

Evolution; international journal of organic evolution

L G Ashman, J G Bragg, P Doughty, M N Hutchinson, S Bank, N J Matzke, P Oliver, C Moritz

Affiliations

  1. Research School of Biology, Australian National University, Canberra, ACT 0200, Australia.
  2. Royal Botanic Garden, Sydney, NSW 2000, Australia.
  3. Department of Terrestrial Zoology, Western Australian Museum, Perth, WA 6016, Australia.
  4. South Australian Museum, Adelaide, SA 5000, Australia.
  5. School of Biological Sciences, University of Adelaide, Adelaide, SA 5005, Australia.
  6. School of Biological Sciences, Flinders University, Adelaide, SA 5042, Australia.
  7. Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen 37073, Germany.
  8. School of Biological Sciences, University of Auckland, Auckland 1142, New Zealand.
  9. Environmental Futures Research Institute, Griffith University, Nathan, QLD 4111, Australia.
  10. Biodiversity and Geosciences Program, Queensland Museum, Brisbane, QLD 4101, Australia.

PMID: 29972238 DOI: 10.1111/evo.13541

Abstract

Ecological opportunity is a powerful driver of evolutionary diversification, and predicts rapid lineage and phenotypic diversification following colonization of competitor-free habitats. Alternatively, topographic or environmental heterogeneity could be key to generating and sustaining diversity. We explore these hypotheses in a widespread lineage of Australian lizards: the Gehyra variegata group. This clade occurs across two biomes: the Australian monsoonal tropics (AMT), where it overlaps a separate, larger bodied clade of Gehyra and is largely restricted to rocks; and in the larger Australian arid zone (AAZ) where it has no congeners and occupies trees and rocks. New phylogenomic data and coalescent analyses of AAZ taxa resolve lineages and their relationships and reveal high diversity in the western AAZ (Pilbara region). The AMT and AAZ radiations represent separate radiations with no difference in speciation rates. Most taxa occur on rocks, with small geographic ranges relative to widespread generalist taxa across the vast central AAZ. Rock-dwelling and generalist taxa differ morphologically, but only the lineage-poor central AAZ taxa have accelerated evolution. This accords with increasing evidence that lineage and morphological diversity are poorly correlated, and suggests environmental heterogeneity and refugial dynamics have been more important than ecological release in elevating lineage diversity.

© 2018 The Author(s). Evolution © 2018 The Society for the Study of Evolution.

Keywords: Australian arid zone; Australian monsoonal tropics; Gehyra; cryptic species; nonecological diversification; phylogenomics

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