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| Mat, Audrey; Sarrazin, Jozee; Markov, Gabriel V.; Apremont, Vincent; Dubreuil, Christine; Eché, Camille; Fabioux, Caroline; Klopp, Christophe; Sarradin, Pierre-marie; Tanguy, Arnaud; Huvet, Arnaud; Matabos, Marjolaine. |
| Biological rhythms are a fundamental property of life. The deep ocean covers 66% of our planet surface and is one of the largest biomes. The deep sea has long been considered as an arrhythmic environment because sunlight is totally absent below 1,000 m depth. In the present study, we have sequenced the temporal transcriptomes of a deep-sea species, the ecosystem-structuring vent mussel Bathymodiolus azoricus. We reveal that tidal cycles predominate in the transcriptome and physiology of mussels fixed directly at hydrothermal vents at 1,688 m depth at the Mid-Atlantic Ridge, whereas daily cycles prevail in mussels sampled after laboratory acclimation. We identify B. azoricus canonical circadian clock genes, and show that oscillations observed in deep-sea... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00640/75236/75385.pdf |
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| Apremont, Vincent; Cambon-bonavita, Marie-anne; Cueff-gauchard, Valerie; Francois, David; Pradillon, Florence; Corbari, Laure; Zbinden, Magali. |
| Rimicaris chacei Williams and Rona 1986, formerly named as Chorocaris chacei, is a caridean shrimp living in deep-sea hydrothermal ecosystems. This shrimp is endemic to the Mid Atlantic Ridge (MAR) and lives at the periphery of aggregates of its well-known congeneric R. exoculata Williams and Rona 1986. Contrasting with the very dense and mobile clusters formed by R. exoculata, R. chacei lives in small groups of several individuals that are not very mobile. Although devoid of the characteristic hypertrophied cephalothorax of R. exoculata, which harbors the ectosymbionts, a microbial community has also been reported in the cephalothorax of R. chacei. Previous data on morphology, behavior and isotopic values indicate a diet based on a combination of feeding... |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00465/57680/59880.pdf |
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