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Comparative phylogeography of two sister species of snowcock: impacts of species-specific altitude preference and life history

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Avian Research 2020年第1期11卷 45-56页

作者： Bei An Lixun Zhang Yutao Wang Sen Song School of Basic Medicine Sciences Lanzhou UniversityLanzhou 730000China School of Life Sciences Lanzhou UniversityLanzhou 730000China Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution Lanzhou UniversityLanzhou 730000China College of Life and Geographic Sciences Kashi UniversityKashi 844000China The Key Laboratory of Ecology and Biological Resources in Yarkand Oasis at Colleges&Universities under the Department of Education of Xinjiang Uygur Autonomous Region Kashi UniversityKashi 844000China

Background: phylogeographical patterns and population dynamics are usually interpreted by environmental disturbances and geographic barriers of the past. However, sister species may exhibit disparate patterns of genetic structures and population dynamics due to their habitat preference and altitude segregation. In this study, we tested how species-specific altitude habitat affected phylogeographical patterns in two sister snowcock species, Tibetan(Tetraogallus tibetanus) and Himalayan Snowcocks(T. himalayensis).Methods: A panel of seven microsatellite loci and a fragment of Mitochondrial DNA Control Region were used to investigate genetic structures and population dynamics in hope of revealing the underlying evolutionary processes through the identification of possible past demographic ***: Our results suggest that T. himalayensis showed a significant phylogeographical signal in mtDNA(FST microsatellite(F the glacial-interglacial cycles in the = 0.66, p phylogeographical signal of T. tibetanus is lower than the level of genetic difference among populations in mtDNA(FST icrosatellite(F= 0.41, p < 0.001) and mST s been experien= 0.09, p < 0.001) data, likely benefiting from stable habitats over a long period of time. T. tibetanus hacing expansion since 0.09 Mys ago. However, an abnormally haplotype H9 from T. himalayensis clustering with T. tibetanus was ***: Our results indicate that differences in habitat preference and altitude specialities were reflected in the genetic structure patterns and population dynamics of these two species. These dissimilarities in life history traits might have affected the dispersal and survival abilities of these two species differently during environmental fluctuations. The results of this study also enriched our knowledge on population differentiation and connec

关键词： Himalayan Snowcock phylogeographical pattern phylogeographical signal Population dynamics Tetraogallus himalayensis Tetraogallus tibetanus Tibetan Snowcock

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