Population history of deep-sea vent and seep Provanna snails (Mollusca: Abyssochrysoidea) in the northwestern Pacific

PeerJ

article

Tomomi Ogura¹  Hiromi Kayama Watanabe²  Chong Chen²  Takenori Sasaki³  Shigeaki Kojima⁴  Jun-ichiro Ishibashi⁵  Katsunori Fujikura¹ 

[1] Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology;Japan Agency for Marine-Earth Science and Technology;The University Museum, The University of Tokyo;Atmosphere and Ocean Research Institute, The University of Tokyo;Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University

关键词: Chemosynthetic community;    DNA barcoding;    Population expansion;    Okinawa Trough;   

DOI  :  10.7717/peerj.5673

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundGastropods of the genus Provanna are abundant and widely distributed in deep-sea chemosynthetic environments with seven extant species described in the northwestern Pacific.MethodsWe investigated the population history and connectivity of five Provanna species in the northwestern Pacific through population genetic analyses using partial sequences of the cytochrome c oxidase subunit I gene.ResultsWe found that P. subglabra, the most abundant and genetically diverse species, is genetically segregated by depth. Among the five species, the three comparatively shallower species (P. lucida, P. kuroshimensis, P. glabra) had a more constant demographic history compared to the deeper species (P. subglabra, P.  clathrata).DiscussionEnvironmental differences, especially depth, appears to have a role in the segregation of Provanna snails. The population of P. clathrata in the Irabu Knoll appears to have expanded after P. subglabra population. The remaining three species, P. lucida, P. kuroshimensis, and P. glabra, are only known from a single site each, all of which were shallower than 1,000 m. These data indicate that Provanna gastropods are vertically segregated, and that their population characteristics likely depend on hydrothermal activities.

【 授权许可】

CC BY