| 中国近海浮游桡足类中华哲水蚤（Calanussinicus Brodsky）的分子系统地理学和种群遗传结构研究 |
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| 作者姓名： | Huang Yousong Liu Guangxing Chen Xiaofeng |
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| 作者单位： | College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;Key Laboratory of Marine Environment and Ecology of Ministry of Education, Ocean University of China, Qingdao 266100, China;College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China |
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| 基金项目： | The National Natural Science Foundation of China under contract Nos 40876066 and 41076085; the National Basic Research Program of China under contract No. 2005CB422306. |
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| 摘 要： | Planktonic copepod Calanus sinicus is the dominant meso-zooplankton in the Northwest Pacific Ocean. To better understand its population dynamics and phylogeographic patterns, 243 C. sinicus individuals were collected from seven locations across the shelf waters of China and its population genetics was studied by mitochondrial DNA cytochrome oxidase I(mtCOI) sequences analyses. Thirty-nine different sequences, or haplotypes, were detected with moderate haplotype diversity(h=0.749) and low nucleotide diversity(π=0.003) for all populations. The evolutionary divergence between geographic populations varied from 0.24% to 0.37%, indicative of very limited genetic differentiation. Visualized minimum spanning network(MSN) and phylogenetic analysis of all the detected haplotypes did not reveal any clear phylogeographic pattern. Furthermore, AMOVA data showed no significant spatial population differentiation existed among the individuals collected across China shelf waters. Pairwise FST values showed that population collected from northwest of the East China Sea(ECS) displayed a low difference to other populations. Mismatch distribution analyses and neutrality tests indicated that C. sinicus might undergo a demographic/population expansion. No significant population genetic structuring was detected, indicating an extensive gene flow among the C. sinicus populations. Our results provide molecular evidence for the hypothesis that C. sinicus in the northwestern South China Sea in winter is transported from the East China Sea and the Yellow Sea by the China Coastal Current during the northeast monsoon period.
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| 关 键 词： | 分子系统地理学 中华哲水蚤 群体遗传结构 浮游桡足类 东中国海 西北太平洋 细胞色素氧化酶 人口动态 |
| 收稿时间： | 2013/4/13 0:00:00 |
| 修稿时间： | 2013/12/17 0:00:00 |
Molecular phylogeography and population genetic structure of the planktonic copepod Calanus sinicus Brodsky in the coastal waters of China |
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| Huang Yousong,Liu Guangxing,Chen Xiaofeng.Molecular phylogeography and population genetic structure of the planktonic copepod Calanus sinicus Brodsky in the coastal waters of China[J].Acta Oceanologica Sinica,2014,33(10):74-84. |
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| Authors: | Huang Yousong Liu Guangxing and Chen Xiaofeng |
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| Institution: | 1.College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China2.College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;Key Laboratory of Marine Environment and Ecology of Ministry of Education, Ocean University of China, Qingdao 266100, China |
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| Abstract: | Planktonic copepod Calanus sinicus is the dominant meso-zooplankton in the Northwest Pacific Ocean. To better understand its population dynamics and phylogeographic patterns, 243 C. sinicus individuals were collected from seven locations across the shelf waters of China and its population genetics was studied by mitochondrial DNA cytochrome oxidase I (mtCOI) sequences analyses. Thirty-nine different sequences, or haplotypes, were detected with moderate haplotype diversity (h=0.749) and low nucleotide diversity (π=0.003) for all populations. The evolutionary divergence between geographic populations varied from 0.24% to 0.37%, indicative of very limited genetic differentiation. Visualized minimum spanning network (MSN) and phylogenetic analysis of all the detected haplotypes did not reveal any clear phylogeographic pattern. Furthermore, AMOVA data showed no significant spatial population differentiation existed among the individuals collected across China shelf waters. Pairwise FST values showed that population collected from northwest of the East China Sea (ECS) displayed a low difference to other populations. Mismatch distribution analyses and neutrality tests indicated that C. sinicus might undergo a demographic/population expansion. No significant population genetic structuring was detected, indicating an extensive gene flow among the C. sinicus populations. Our results provide molecular evidence for the hypothesis that C. sinicus in the northwestern South China Sea in winter is transported from the East China Sea and the Yellow Sea by the China Coastal Current during the northeast monsoon period. |
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| Keywords: | copepod Calanus sinicus mtCOI population genetic differentiation China Coastal Current |
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