Microbes and Environments
Online ISSN : 1347-4405
Print ISSN : 1342-6311
Regular Papers
Diversity and Function of Epibiotic Microbial Communities on the Galatheid Crab, Shinkaia crosnieri
Tomo-o WatsujiSatoshi NakagawaShinji TsuchidaTomohiro TokiAkinari HirotaUrumu TsunogaiKen Takai
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2010 Volume 25 Issue 4 Pages 288-294

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Abstract

The galatheid crab, Shinkaia crosnieri (Decapoda: Galatheidae), forms dense colonies in the Iheya North and Hatoma Knoll deep-sea hydrothermal fields and has numerous setae covered with filamentous epibiotic microorganisms. Molecular phylogenetic analyses revealed that the epibiotic communities in S. crosnieri consisted mainly of yet-uncultivated phylotypes within Epsilonproteobacteria and Gammaproteobacteria in both hydrothermal vent fields. Uptake experiments using 13C-labeled tracers clearly demonstrated that both H13CO3 and 13CH4 were assimilated into not only the epibiotic microbial communities associated with the setae, but also the epibiont-free tissue of living S. crosnieri. In addition, the incorporation of H13CO3 into the microbial cells was strongly stimulated by the presence of reduced sulfur compounds but not by H2. In conclusion, the uptake experiments suggested that sulfur-oxidizing chemolithoautotrophic and methanotrophic production by the epibionts provides the nutrition for S. crosnieri.

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© Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology
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