Comparing the genetic diversity and population structure of sister marine snails having contrasting habitat specificity
Comparing the genetic diversity and population structure of sister marine snails having contrasting habitat specificity
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DOI：
10.1007/s11033-021-06885-x
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发表时间：
2021-11
影响因子：
2.8
通讯作者：
D. Yamazaki;S. Chiba
中科院分区：
文献类型：
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作者：
D. Yamazaki;S. Chiba
研究背景掌握开放、可连通的海洋环境中的空间遗传结构过程是分子生物学研究的主要研究目标。使用多个物种进行比较海景遗传学是了解自然地理和海洋学对遗传变异影响的有效方法。此外，物种特异性的生态特征，如扩散能力和栖息地特异性，是空间遗传结构的重要因素。方法和结果我们重点研究了海洋蜗牛姐妹物种Tegula kusairo和T。日本本土周围的 xanthostigma，在波浪强度方面具有不同的栖息地特异性。 Tegula kusairo 仅栖息于受庇护的沿海环境，而 T. xanthostigmais 主要发现于面向公海的暴露于波浪的岩石海岸上。我们根据 mtDNA 估计了它们的遗传多样性指数和群体分化水平。我们发现T. kusairow 低于 T。 xanthostigma，而其群体遗传分化水平高于T.xanthostigma。黄柱。也就是说，特定于弱波浪环境的物种比特定于强波浪作用的物种具有更高水平的种群遗传分化。结论生态特征不仅与扩散能力有关，而且与栖息地特异性有关，可以影响分布在同一海景中的一对密切相关的姐妹物种的遗传变异。
BackgroundTo grasp the processes of spatial genetic structuring in open and connectable marine environments is the principal study goal in molecular biological studies. Comparative seascape genetics using multiple species are a powerful approach to understand the physical geographic and oceanographic effects on genetic variation. Besides, species-specific ecological traits such as dispersal abilities and habitat specificity are important factors for spatial genetic structuring.Methods and ResultsWe focused on the sister marine snail speciesTegula kusairoandT. xanthostigmaaround the Japanese mainland, which have contrasting habitat specificities for wave strength.Tegula kusairoonly inhabits sheltered coastal environments, whileT. xanthostigmais found mainly on wave-exposed rocky shores facing the open sea. We estimated their genetic diversity indices and levels of population differentiation based on mtDNA. We found that the genetic diversity ofT. kusairowas lower than that ofT. xanthostigma, while their level of population genetic differentiation was higher than that ofT. xanthostigma. Namely, the species specific to weak wave environments had a higher level of population genetic differentiation than the species specific to strong wave action.ConclusionEcological traits linked not only to dispersal abilities but also to habitat specificity can influence genetic variation in a pair of closely related sister species distributed in the same seascape.