Molecular phylogeny of glacial relict species: a case of freshwater Valvatidae molluscs (Mollusca: Gastropoda) in North and East Asia
Molecular phylogeny of glacial relict species: a case of freshwater Valvatidae molluscs (Mollusca: Gastropoda) in North and East Asia
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DOI：
10.1007/s10750-018-3595-y
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发表时间：
2018-03
期刊：
影响因子：
2.6
通讯作者：
Takumi Saito;L. Prozorova;T. Sitnikova;Purevdorj Surenkhorloo;T. Hirano;Y. Morii;S. Chiba
中科院分区：
文献类型：
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作者：
Takumi Saito;L. Prozorova;T. Sitnikova;Purevdorj Surenkhorloo;T. Hirano;Y. Morii;S. Chiba
冰川残存物种的研究一直侧重于了解物种的生物地理模式是如何发展的。利用系统发育和种群遗传学方法对陆相冰川残留物种进行了大量的研究，并阐明了它们的形成机制。另一方面，对栖息在淡水系统中的冰川残存物种的关注较少。特别是，稳定的湖泊在冰川时期可以作为避难所，但对栖息在湖泊中的淡水残留物种的研究还没有很好地进行。为了阐明淡水冰川残留物种的形成机制，我们对被认为是日本群岛冰川遗迹的淡水Valvatidae软体动物进行了分子系统发育分析、分化时间估算和生物地理重建。我们的研究表明，日本群岛的Valvatid动物群是由亚洲大陆的多次扩散事件和上新世-第四纪冰期的交替事件产生的。它包括在不同的湖泊中幸存下来的间冰期的多种残留物种。这些发现表明，这些湖泊不仅可以作为冰期的避难所，也可以作为间冰期的避难所。
The study of glacial relict species has been focused on understanding how the biogeographic patterns of species have developed. A number of studies using phylogenetic and population genetics approaches have been conducted for terrestrial glacial relict species, and the mechanisms of their formation have been elucidated. On the other hand, less focus has been placed on glacial relict species inhabiting freshwater systems. In particular, stable lakes can serve as refugia during a glacial period, but research studies on freshwater relict species inhabiting lakes have not been well conducted. In order to clarify the mechanism of the glacial relict species in freshwater, we conducted a molecular phylogeny analysis, divergence time estimation, and a biogeographic reconstruction on freshwater Valvatidae molluscs, which have been considered as a glacial relict in the Japanese Archipelago. Our study shows that the valvatid fauna in the Japanese Archipelago was produced by multiple dispersal events from the Asian continent and by vicariance events during the period of the Pliocene–Quaternary glaciation. It includes multiple relict species that survived interglacial periods in different lakes. These findings suggest that the lakes can serve as refugia not only during glacial periods, but also during interglacial periods.