Strict allopatric speciation of sky island Pyrrhula erythaca species complex

Feng Dong, Shou Hsien Li, Chi Cheng Chiu, Lu Dong, Cheng Te Yao, Xiao Jun Yang

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Increasing evidence of post-divergence gene flow between taxa is shifting our understanding on the mode of speciation. A fundamental question arises concerning the circumstances under which strict allopatric speciation still holds true. Sky island populations might undergo reduced gene flow by niche conservatism to highland habitats and follow divergence in an allopatric manner. In this study, we tested this hypothesis in the sky island Grey-headed Bullfinch (Pyrrhula erythaca) species complex via statistical analyses of both genetic and ecological data. Results of coalescent-based analysis of multiple nuclear loci suggested that P. e. owstoni likely colonized Taiwan island during the severe mid-Pleistocene glacial climate followed by strictly allopatric divergence from P. e. erythaca distributed in Himalayas-Hengduan mountains and central North China. Results of ecological niche modeling suggested that their speciation may be attributed to the niche conservatism of these birds and the lack of a suitable ecological corridor during subsequent milder glacial episodes. In addition, we delimited the traditionally defined P. erythaca into two full species, P. erythaca in the Asian mainland and P. owstoni on the island of Taiwan, based on both genetic and behavioural evidences. These results suggest that ecology can have a dynamic role in allowing highland populations to expand their ranges and isolated by habitat barriers to diversify in a strictly allopatric manner.

原文英語
文章編號106941
期刊Molecular Phylogenetics and Evolution
153
DOIs
出版狀態已發佈 - 2020 十二月

ASJC Scopus subject areas

  • 生態學、進化論、行為學與系統學
  • 分子生物學
  • 遺傳學

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