Comparative phylogeography of alpine invertebrates indicates deep lineage diversification and historical refugia in the Australian Alps

Endo, Yoshinori, Nash, Michael, Hoffmann, Ary A, Slatyer, Rachel and Miller, Adam D 2015, Comparative phylogeography of alpine invertebrates indicates deep lineage diversification and historical refugia in the Australian Alps, Journal of biogeography, vol. 42, no. 1, pp. 89-102, doi: 10.1111/jbi.12387.

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Title Comparative phylogeography of alpine invertebrates indicates deep lineage diversification and historical refugia in the Australian Alps
Author(s) Endo, Yoshinori
Nash, Michael
Hoffmann, Ary A
Slatyer, Rachel
Miller, Adam DORCID iD for Miller, Adam D
Journal name Journal of biogeography
Volume number 42
Issue number 1
Start page 89
End page 102
Total pages 14
Publisher Wiley
Place of publication Chichester, Eng.
Publication date 2015-01-01
ISSN 0305-0270
Keyword(s) Alpine biodiversity
Australian Alps
conservation biogeography
Conservation planning
genetic diversity
mitochondrial DNA
nuclear DNA
Summary Aim: Comparative phylogeographic analyses of alpine biota from the Northern Hemisphere have linked patterns of genetic diversification to glacial expansion and contraction events in the Pliocene and Pleistocene. Furthermore, the extent of diversification across species groups appears to be associated with vagility. In this study we test whether these patterns apply to a geologically stable system from eastern Australia with comparatively shallow elevational gradients and minimal influence from historical glacial activity. Location: The Australian Alps, Victoria, eastern Australia. Methods: We considered phylogeographic patterns across five alpine invertebrate species based on mitochondrial and nuclear DNA sequence data. Bayesian inference methods were used to estimate species phylogenies and divergence times among lineages. GIS tools were used to map interpopulation genetic divergence and intrapopulation genetic diversity estimates and to visualize spatial patterns across species, providing insights into patterns of endemism and demographic history. Results: Phylogeographic patterns and the timing of lineage diversification were consistent across taxonomic groups. Mountain summits harbour highly differentiated haplogroups, including summits connected by high-elevational plateaus, pointing to diversifications being maintained since the early to mid-Pleistocene. These findings are consistent with previous studies of alpine mammals and reptiles, demonstrating a high degree of endemism in this region, regardless of species vagility. Main conclusions: The fine spatial scales at which deep genetic differentiation among alpine communities was observed in this study are unprecedented. This suggests that glacial periods have had less of an impact on species distributions and genetic diversity than they have in alpine systems in the Northern Hemisphere. Historical gene flow among sky-island populations has been limited despite connecting snowlines during glacial periods, suggesting that factors other than snow cover have influenced patterns of gene flow in this region. These findings emphasize the unique phylogeographic history affecting Victorian alpine biodiversity, and the importance of conserving biodiversity from multiple mountain summits in this region of high endemism.
Language eng
DOI 10.1111/jbi.12387
Field of Research 060208 Terrestrial Ecology
060302 Biogeography and Phylogeography
060408 Genomics
050104 Landscape Ecology
050202 Conservation and Biodiversity
Socio Economic Objective 960305 Ecosystem Adaptation to Climate Change
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Wiley
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