Gill chamber and gut microbial communities of the hydrothermal shrimp Rimicaris chacei Williams and Rona 1986: A possible symbiosis

Type Article
Date 2018-11
Language English
Author(s) Apremont Vincent1, 2, Cambon-Bonavita Marie-AnneORCID1, Cueff-Gauchard ValerieORCID1, Francois David1, Pradillon FlorenceORCID3, Corbari Laure4, Zbinden Magali2
Affiliation(s) 1 : Univ Brest, IFREMER, CNRS, Lab Microbiol Environm Extremes, Plouzane, France.
2 : Sorbonne Univ, Unite Biol ORganismes & Ecosyst Aquat BOREA, MNHN, CNRS,IRD Equipe Adaptat Milieux Extremes AMEX, 7 Quai St Bernard, Paris, France.
3 : Ifremer Ctr Bretagne, ZI Pointe Diable, Lab Environm Profond, REM EEP LEP, Plouzane, France.
4 : UPMC, Museum Natl Hist Nat, Inst Systemat, Evolut,Biodiversite ISYEB,UMR 7205,CNRS,MNHN,EPH, Paris, France.
Source Plos One (1932-6203) (Public Library Science), 2018-11 , Vol. 13 , N. 11 , P. e0206084 (22p.)
DOI 10.1371/journal.pone.0206084
WOS© Times Cited 16

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 on its epibiotic bacteria and scavenging or occasional predation. In this study, our objective was to describe, for the first time, the distribution, morphology and phylogeny of the microbial communities associated with R. chacei. This species is significantly less studied than R. exoculata, but nevertheless represents the only other known example of symbiosis in crustaceans of MAR hydrothermal vent sites. Microbial communities have been observed at the same locations as in R. exoculata (mouthparts, branchiostegites and digestive tract). However, in R. chacei, the surfaces occupied by the bacteria are smaller. The main lineages are affiliated to Epsilon and Gammaproteobacteria in the cephalothorax and to Deferribacteres, Mollicutes, Epsilon and Gammaproteobacteria in the digestive tract. Comparison with the well-described bacterial communities of R. exoculata and hypotheses about the role of these communities in R. chacei are discussed.

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Publisher's official version 22 3 MB Open access
S1 Fig. Stereomicroscopic view of R. chacei stomachs and midguts. 3 MB Open access
S2 Fig. Rarefaction curves of cephalothoracic clone libraries of R. chacei samples. 1 179 KB Open access
S3 Fig. Rarefaction curves of digestive tract clone libraries of R. chacei samples. 1 177 KB Open access
S4 Fig. Dendogram of all analyzed samples, based on Bray–Curtis beta diversity on the left, and taxonomy of sequences associated with each sample on the right. 1 180 KB Open access
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Apremont Vincent, Cambon-Bonavita Marie-Anne, Cueff-Gauchard Valerie, Francois David, Pradillon Florence, Corbari Laure, Zbinden Magali (2018). Gill chamber and gut microbial communities of the hydrothermal shrimp Rimicaris chacei Williams and Rona 1986: A possible symbiosis. Plos One, 13(11), e0206084 (22p.). Publisher's official version : , Open Access version :