Was the exposed continental shelf a long-distance colonization route in the ice age? The Southeast Asia origin of Hainan and Taiwan partridges

De Chen, Jiang Chang, Shou Hsien Li, Yang Liu, Wei Liang, Fang Zhou, Cheng Te Yao, Zhengwang Zhang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Research on island biotas has greatly contributed to the development of modern evolutionary and biogeographic theories. Until now, most studies have suggested that continental islands received their biotas directly from the adjacent mainland. However, only a few studies have indicated that species on continental islands might originate from other distantly non-adjacent regions. Here, we used the hill partridges (genus Arborophila) that are widely distributed in the southwest and southeast China mainland, Indochina, Hainan and Taiwan islands to test whether species on continental islands might originate from distant regions rather than the adjacent mainland. Based on molecular phylogenies inferred from three mitochondrial fragments and three nuclear introns, together with ancestral area reconstruction, we found that the ancestors of the endemic Hainan and Taiwan partridges (A. ardens and A. crudigularis) likely originated from Indochina, rather than the nearby southeast China mainland. The divergence time estimates demonstrate that their ancestors likely colonized Hainan and Taiwan islands using the long exposed continental shelf between Indochina, Hainan and Taiwan islands during glacial periods, which had not been demonstrated before. Thus, integrating distribution data with phylogenetic information can shed new lights on the historical biogeography of continental islands and surrounding mainland regions.

Original languageEnglish
Pages (from-to)167-173
Number of pages7
JournalMolecular Phylogenetics and Evolution
Volume83
DOIs
Publication statusPublished - 2015 Feb 1

Keywords

  • Biogeography
  • Continental islands
  • Exposed continental shelf
  • Hill partridges
  • Phylogeny
  • Southeast Asia

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics

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