ABSTRACT: Recent molecular ecological studies have focused on how the relationships between physical and ecological factors influence marine biogeography. Comparative phylogeography using closely related species is a powerful approach to evaluate the role of ecological traits in the genetic variation of marine organisms. In the present study, we compared ecological traits and genetic variation in 3 species of the intertidal snail genus Monodonta that co-occur in the Japanese and Ryukyu archipelagoes. We found that M. labio was dominant in sheltered habitats and M. perplexa was dominant in wave-exposed habitats, while M. confusa showed no habitat specificity. This indicates that M. labio and M. perplexa are habitat specialists regarding wave exposure, while M. confusa is a generalist. M. labio and M. perplexa showed lower genetic diversity and greater genetic differentiation among populations than M. confusa. Our findings support the specialist-generalist variation hypothesis in a well-connected marine environment.

中文翻译：

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共同分布的潮间蜗牛Monondonta spp的比较海景遗传学。在日本和琉球群岛

摘要：最近的分子生态学研究集中于物理和生态因素之间的关系如何影响海洋生物地理学。使用密切相关的物种进行比较系统地理学是评估生态性状在海洋生物遗传变异中的作用的有力方法。在本研究中，我们比较了日本和琉球群岛同时发生的潮间蜗牛属Monondonta的3种物种的生态特征和遗传变异。我们发现，Labio占主导地位的庇护所生境和Perplexa占主导地位的波暴露的栖息地，而孔子分枝杆菌显示没有栖息地的特异性。这表明M. labio和M. perplexa是关于波曝光，同时栖息地专家M.银花是一个通才。M. labio和M. perplexa的种群间遗传多样性较低，遗传分化程度高于Confus Confusa。我们的研究结果支持了在紧密相连的海洋环境中专家-专家论的变异假说。