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首页> 外文期刊>Marine biology >Different evolutionary histories in two sympatric limpets of the genus Nacella (Patellogastropoda) in the South-western Atlantic coast
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Different evolutionary histories in two sympatric limpets of the genus Nacella (Patellogastropoda) in the South-western Atlantic coast

机译：西南大西洋沿岸Nacella（Patellogastropoda）属的两个同伴戚中的不同进化史

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摘要

The phylogeography of two sympatric Magellanic limpets of the genus Nacella was studied. The historical and contemporary processes underlying their intraspecific patterns in Argentina were inferred using the mitochondrial cytochrome oxidase I gene. Results indicate different evolutionary histories in the two species. A recent geographic and demographic expansion ~ 11,000 years ago, with absence of current genetic structuring, is proposed for Nacella magellanica. In contrast, the phylogeo-graphic pattern showed noticeable phylogenetic and geographic discontinuities in Nacella deaurata; slow continuous population size growth with current low levels of gene flow among its populations was also observed, indicating demographic equilibrium. The beginning of divergence between these closely related limpets was estimated at about 270,000 years ago with very little or none gene flow occurring after their splitting. These contrasting historic patterns could be related to distinctive responses to climate changes associated with Pleistocene glaciations, as a result of differences in their ecological traits.
机译：研究了机舱属的两个同胞麦哲伦菌毛的系统地理学。利用线粒体细胞色素氧化酶I基因推断了阿根廷种内模式背后的历史和当代过程。结果表明两种物种的进化史不同。有人建议将近来的Nacella magellanica进行到11000年前的地理和人口扩展，而没有当前的遗传结构。相比之下，植物地理学模式显示了在Nacella deaurata中明显的系统发育和地理不连续性。还观察到种群数量持续缓慢增长，且种群之间当前的基因流水平较低，这表明人口结构均衡。这些密切相关的帽贝之间开始分化的时间大约在270,000年前，它们分裂后几乎没有或没有发生基因流。这些不同的历史模式可能与对更新世冰川相关的气候变化的独特反应有关，这是由于它们生态特征的差异。

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  • 来源
    《Marine biology》 |2011年第11期|p.2405-2418|共14页
  • 作者

    M. Carla de Aranzamendi; Ricardo Bastida; Cristina N. Gardenal;

  • 作者单位

    Catedra de Genetica de Poblaciones y Evolution, Facultad de Ciencias Exactas, Ffsicas y Naturales, Universidad Nacional de Cordoba, Avenida Velez Sarsfield 299, 5000 Cordoba, Argentina;

    rnDepartamento de Ciencias Marinas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC43, 7600 Mar del Plata, Argentina;

    Catedra de Genetica de Poblaciones y Evolution, Facultad de Ciencias Exactas, Ffsicas y Naturales, Universidad Nacional de Cordoba, Avenida Velez Sarsfield 299, 5000 Cordoba, Argentina;

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