| Autor: |
Breusing C; Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882., Genetti M; Jack Baskin School of Engineering, University of California, Santa Cruz, CA 95064., Russell SL; Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, CA 95064., Corbett-Detig RB; Jack Baskin School of Engineering, University of California, Santa Cruz, CA 95064., Beinart RA; Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882. |
| Abstrakt: |
SignificanceIn marine ecosystems, transmission of microbial symbionts between host generations occurs predominantly through the environment. Yet, it remains largely unknown how host genetics, symbiont competition, environmental conditions, and geography shape the composition of symbionts acquired by individual hosts. To address this question, we applied population genomic approaches to four species of deep-sea hydrothermal vent snails that live in association with chemosynthetic bacteria. Our analyses show that environment is more important to strain-level symbiont composition than host genetics and that symbiont strains show genetic variation indicative of adaptation to the distinct geochemical conditions at each vent site. This corroborates a long-standing hypothesis that hydrothermal vent invertebrates affiliate with locally adapted symbiont strains to cope with the variable conditions characterizing their habitats. |
