Late Pleistocene population expansion of Scylla paramamosain along the coast of China: A population dynamic response to the Last Interglacial sea level highstand
文献类型： 外文期刊
作者： He, Lijun 1 ; Zhang, Aibing 2 ; Weese, David 3 ; Zhu, Chaodong 4 ; Jiang, Chaojun 1 ; Qiao, Zhenguo 1 ;
作者机构： 1.Chinese Acad Fishery Sci, E China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China
2.Capital Normal Univ, Coll Life Sci, Beijing 100048, Peoples R China
3.Auburn Univ, Dept Biol Sci, Auburn, AL 36849 USA
4.Chinese Acad Sci, Inst Zool, Beijing 100101, Peoples R China
关键词： chinese seas;last deglaciation;mtDNA;population expansion;scylla paramamosain;sea level fluctuation
期刊名称：JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY （ 影响因子：2.171； 五年影响因子：2.749 ）
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收录情况： SCI
摘要： The climatic oscillations of the Pleistocene are believed to have greatly impacted the distribution and population dynamics of many terrestrial and marine taxa. Studies investigating the evolutionary effects of palaeo-climatic fluctuations in the East Asia Seas are scarce and the limited studies available suggest two competing evolutionary patterns: high genetic diversity and clear population structure or low genetic diversity and homogeneous population structure. To explore the general consequence of sea level oscillations in the East Asia Seas, the population demographic history and genetic structure of the mud crab, Scylla paramamosain, were investigated using specimens sampled from 11 localities along the Chinese coast. Molecular data (COI, 16S rDNA and concatenated sequences) depicted a star-like tree and suggested a recent population demographic expansion for the species. Through pairwise F_(ST) comparisons, although shallow differentiation was found between the Beibu Bay and other sites, a genetic homogeneous population structure with high gene flow (N_em＞5) was observed between most localities. Lower sea levels during the penultimate glaciation (ca. 140 kya) and the sea level highstand of MIS5e (130-116 kya) could be responsible for the population bottleneck and subsequent demographic expansion inferred for S. paramamosain, and the reversal of interglacial seasonal circulations and long larval development may have facilitated gene flow leading to a homogeneous population structure via planktonic larvae transport between the South China and East China Seas. These molecular, ecological and oceanographic clues indicate that the basin model of recruitment may provide the best explanation for the genetic structure and population history revealed for S. paramamosain.
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