Bacterial communities associated with the wood-feeding gastropod Pectinodonta sp (Patellogastropoda, Mollusca)
| Type | Article | ||||||||
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| Date | 2010-11 | ||||||||
| Language | English | ||||||||
| Author(s) | Zbinden Magali1, Pailleret Marie2, Ravaux Juliette1, Gaudron Sylvie M.1, Hoyoux Caroline3, Lambourdiere Josie4, Waren Anders5, Lorion Julien6, Halary Sebastien1, Duperron Sebastien1 | ||||||||
| Affiliation(s) | 1 : Univ Paris 06, CNRS, UMR 7138, AMEX, F-72252 Paris 05, France. 2 : Univ Paris 06, Lab Paleobot Paleodiversite & Paleoenvironm, F-72252 Paris, France. 3 : Univ Liege, Unite Morphol Ultrastruct, Lab Morphol Fonct & Evolut, Liege, Belgium. 4 : CNRS MNHN, Museum Natl Hist Nat, Dept Systemat & Evolut, Paris, France. 5 : Swedish Museum Nat Hist, S-10405 Stockholm, Sweden. 6 : UPMC IRD MNHN CNRS, UMR 7138, Museum Natl Hist Nat, Dept Systemat & Evolut, Paris, France. |
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| Source | Fems Microbiology Ecology (0168-6496) (Wiley-blackwell Publishing, Inc), 2010-11 , Vol. 74 , N. 2 , P. 450-463 | ||||||||
| DOI | 10.1111/j.1574-6941.2010.00959.x | ||||||||
| WOS© Times Cited | 28 | ||||||||
| Keyword(s) | sunken woods, wood-feeding gastropod, symbiosis, cellulolytic activity | ||||||||
| Abstract | Even though their occurrence was reported a long time ago, sunken wood ecosystems at the deep-sea floor have only recently received specific attention. Accumulations of wood fragments in the deep sea create niches for a diverse fauna, but the significance of the wood itself as a food source remains to be evaluated. Pectinodonta sp. is a patellogastropod that exclusively occurs on woody substrates, where individuals excavate deep depressions, and is thus a potential candidate for a wood-eating lifestyle. Several approaches were used on Pectinodonta sampled close to Tongoa island (Vanuatu) to investigate its dietary habits. Host carbon is most likely derived from the wood material based on stable isotopes analyses, and high cellulase activity was measured in the digestive mass. Electron microscopy and FISH revealed the occurrence of two distinct and dense bacterial communities, in the digestive gland and on the gill. Gland-associated 16S rRNA gene bacterial phylotypes, confirmed by in situ hybridization, included members of three divisions (Alpha- and Gammaproteobacteria, Bacteroidetes), and were moderately related (90-96% sequence identity) to polymer-degrading and denitrifying bacteria. Gill-associated phylotypes included representatives of the Delta- and Epsilonproteobacteria. The possible involvement of these two bacterial communities in wood utilization by Pectinodonta sp. is discussed. | ||||||||
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