Multi-Species Phylogeography of Arid-Zone Sminthopsinae (Marsupialia: Dasyuridae) Reveals Evidence of Refugia and Population Expansion in Response to Quaternary Change
| Autor: | Linette S. Umbrello, Ric How, Joel A. Huey, Raphael K. Didham |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Planigale lcsh:QH426-470 Climate Change Population Species distribution population expansion Sminthopsis DNA Mitochondrial 010603 evolutionary biology 01 natural sciences Article Intraspecific competition Coalescent theory 03 medical and health sciences refugia Genetics Animals D-loop education Ecosystem Genetics (clinical) desert education.field_of_study biology Ecology Australia Genetic Variation Bayes Theorem Pilbara Dasyuridae biology.organism_classification Pleistocene Phylogeography lcsh:Genetics Genetics Population Marsupialia 030104 developmental biology Haplotypes Refugium Habitat |
| Zdroj: | Genes Volume 11 Issue 9 Genes, Vol 11, Iss 963, p 963 (2020) |
| ISSN: | 2073-4425 |
| DOI: | 10.3390/genes11090963 |
| Popis: | Historical population contraction and expansion events associated with Pleistocene climate change are important drivers of intraspecific population structure in Australian arid-zone species. We compared phylogeographic patterns among arid-adapted Dasyuridae (Sminthopsis and Planigale) with close phylogenetic relationships and similar ecological roles to investigate the drivers of phylogeographic structuring and the importance of historical refugia. We generated haplotype networks for two mitochondrial (control region and cytochrome b) and one nuclear (omega-globin) gene from samples distributed across each species range. We used &Phi ST to test for a genetic population structure associated with the four Pilbara subregions, and we used expansion statistics and Bayesian coalescent skyline analysis to test for signals of historical population expansion and the timing of such events. Significant population structure associated with the Pilbara and subregions was detected in the mitochondrial data for most species, but not with the nuclear data. Evidence of population expansion was detected for all species, and it likely began during the mid-late Pleistocene. The timing of population expansion suggests that these species responded favorably to the increased availability of arid habitats during the mid-late Pleistocene, which is when previously patchy habitats became more widespread. We interpret our results to indicate that the Pilbara region could have acted as a refugium for small dasyurids. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|