Phylogeographical structure and demographic expansion in the endemic alpine stream salamander (Hynobiidae: Batrachuperus) of the Qinling Mountains
| Autor: | Yan-Ling Song, Hui-Sheng Gong, Feng-Lan Yu, Zu-Shi Huang, Zhi-Gao Zeng, Qiong Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine China Genotype Pleistocene Science Lineage (evolution) Urodela Batrachuperus DNA Mitochondrial 010603 evolutionary biology 01 natural sciences Article 03 medical and health sciences biology.animal Animals Alpine stream salamander Ecosystem Phylogeny Genetic diversity Multidisciplinary Geography biology Ecology Genetic Variation Last Glacial Maximum Biodiversity Models Theoretical biology.organism_classification Phylogeography Genetics Population 030104 developmental biology Medicine Salamander human activities Cenozoic |
| Zdroj: | Scientific Reports Scientific Reports, Vol 7, Iss 1, Pp 1-13 (2017) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-017-01799-w |
| Popis: | The Qinling Mountains of China provide an excellent study area for assessing the effect of Pleistocene climatic oscillations and paleogeological events on intraspecific diversification. To assess genetic diversity of an endemic stream salamander, Batrachuperus tibetanus, for its conservation, a phylogeographical survey was performed based on mitochondrial DNA and morphological data. The mitochondrial data revealed three lineages of B. tibetanus in the Qinling Mountains. A lineage present in the northwestern Qinling Mountains groups with the Tibet lineage of B. tibetanus, and the remaining Qinling populations are eastern and western lineages that separated ~3–4 million years ago (Ma). The eastern and western Qinling lineage delineation is supported by three morphological variables (snout length, eye diameter and axilla-groin length). The divergence of the two major lineages was likely caused by orogenesis of the Qinling Mountains during the late Cenozoic, and the two lineages were subsequently affected at different levels by Pleistocene climatic oscillations showing different signals of demographic expansion. A large suitable area of B. tibetanus through the Qinling Mountains since the last glacial maximum (LGM) indicated the adaptation of this species to the climatic changes. However, low genetic diversity within populations indicate the urgency of preserving the vulnerable populations and endemic lineages. |
| Databáze: | OpenAIRE |
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