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Marine Ecology Progress Series

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MEPS 657:135-146 (2021)  -  DOI: https://doi.org/10.3354/meps13553

Comparative seascape genetics of co-distributed intertidal snails Monodonta spp. in the Japanese and Ryukyu archipelagoes

Daishi Yamazaki1,*, Osamu Miura2, Shota Uchida3, Minoru Ikeda4, Satoshi Chiba3

1Center for Northeast Asian Studies, Tohoku University, 41 Kawauchi, Aoba-ku, Sendai, Miyagi 980-8576, Japan
2Faculty of Agriculture and Marine Science, Kochi University, 200 Monobe, Nankoku, Kochi 783-8502, Japan
3Department of Ecology and Evolutionary Biology, Graduate School of Life Science, Tohoku University, Aobayama, Aoba-ku, Sendai, Miyagi 980-8578, Japan
4Laboratory of Integrative Aquatic Biology, Graduate School of Agricultural Science, Tohoku University, Konorihama, Onagawa, Oshika, Miyagi 986-2242, Japan
*Corresponding author:

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.


KEY WORDS: Specialist-generalist variation hypothesis · SGVH · Phylogeography · Genetic structure · Habitat range · Intertidal gastropods · Monodonta


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Cite this article as: Yamazaki D, Miura O, Uchida S, Ikeda M, Chiba S (2021) Comparative seascape genetics of co-distributed intertidal snails Monodonta spp. in the Japanese and Ryukyu archipelagoes. Mar Ecol Prog Ser 657:135-146. https://doi.org/10.3354/meps13553

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