Comparative phylogeography and connectivity of sibling species of the marine copepod Clausocalanus (Calanoida)
Comparative phylogeography and connectivity of sibling species of the marine copepod Clausocalanus (Calanoida)
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DOI：
10.1016/j.jembe.2011.05.011
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发表时间：
2011-07-31
影响因子：
2
通讯作者：
Bucklin, Ann
中科院分区：
文献类型：
--
作者：
Blanco-Bercial, Leocadio;Alvarez-Marques, Florentina;Bucklin, Ann
海洋上层环境的连通性取决于可能难以识别的微妙障碍的存在和海洋地质历史的信号。这项研究审查了物种的地理分布对其种群结构的影响，这是由海洋最近地质历史的差异效应所介导的。为此，我们研究了线粒体细胞色素氧化酶C亚基I（COI）基因的序列变异的样本中的两个兄弟种的哲水蚤属黄哲水蚤。分析包括分子群体遗传学，地理学和系统发育的方法。世界性的黄皮哲水蚤在这个物种广泛的地理范围内有一个单一的panmictic种群，有足够的基因流-尽管距离遥远，地质和海洋学的障碍-以保持遗传凝聚力。相比之下，双反热带的Clausocalanus lividus大西洋和太平洋种群之间表现出明显的分化，这表明一个vicariance过程，巴拿马地峡的崛起后开始。(C)2011爱思唯尔有限公司版权所有。
Connectivity of the marine epipelagic environment is subject to presence of subtle barriers that can be difficult to identify and to signals from the geological history of the oceans. This study examines the effects of species' geographical distribution on their population structure as mediated by differential effects of the recent geological history of the oceans. For this purpose, we studied the sequence variation of the mitochondrial cytochrome oxidase c subunit I (COI) gene in samples of two sibling species of the calanoid copepod genus Clausocalanus. Analyses included molecular population genetic, phylogeographic, and phylogenetic approaches. The cosmopolitan Clausocalanus arcuicornis is shown to have a single panmictic population across this species' extensive geographic range, with sufficient gene flow - despite vast distances and geological and oceanographic barriers - to maintain genetic cohesion. In contrast, the biantitropical Clausocalanus lividus exhibits clear differentiation between Atlantic and Pacific Ocean populations, suggesting a vicariance process that started after the rise of the Isthmus of Panama. (C) 2011 Elsevier B.V. All rights reserved.