FN Archimer Export Format
PT J
TI Influence of CH4 and H2S availability on symbiont distribution, carbon assimilation and transfer in the dual symbiotic vent mussel Bathymodiolus azoricus
BT 
AF RIOU, V.
   HALARY, S.
   DUPERRON, S.
   BOUILLON, S.
   ELSKENS, M.
   BETTENCOURT, R.
   SANTOS, R. S.
   DEHAIRS, F.
   COLACO, A.
AS 1:1,2;2:3,4;3:3,4;4:2,5,6;5:2;6:1;7:1;8:2;9:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 Univ Azores, IMAR, Dept Oceanog & Fisheries, Horta, Portugal.
   Vrije Univ Brussels, Dept Analyt & Environm Chem, Brussels, Belgium.
   Univ Paris 06, UPMC, UMR 7138, SAE AMEX, Paris, France.
   CNRS, UMR 7138, SAE AMEX, Paris, France.
   Netherlands Inst Ecol, Ctr Estuarine & Marine Ecol, Yerseke, Netherlands.
   Katholieke Univ Leuven, Dept Earth & Environm Sci, Louvain, Belgium.
C2 UNIV AZORES, PORTUGAL
   UNIV VRIJE BRUSSEL, BELGIUM
   UNIV PARIS 06, FRANCE
   CNRS, FRANCE
   NIOO-KNAW, NETHERLANDS
   UNIV KATHOLIEKE LEUVEN, BELGIUM
IN DOAJ
IF 3.445
TC 48
UR https://archimer.ifremer.fr/doc/00207/31865/30271.pdf
LA English
DT Article
CR MOMARETO
BO Unknown
DE ;mid-atlantic ridge;hydrocarbon-seep mussel;deep-sea mussels;hydrothermal-vent;puteoserpentis bivalvia;mytilidae;methane;endosymbionts;bacteria;metabolism
AB High densities of mussels of the genus Bathymodiolus are present at hydrothermal vents of the Mid-Atlantic Ridge. It was previously proposed that the chemistry at vent sites would affect their sulphide- and methane-oxidizing endosymbionts' abundance. In this study, we confirmed the latter assumption using fluorescence in situ hybridization on Bathymodiolus azoricus specimens maintained in a controlled laboratory environment at atmospheric pressure with one, both or none of the chemical substrates. A high level of symbiosis plasticity was observed, methane-oxidizers occupying between 4 and 39% of total bacterial area and both symbionts developing according to the presence or absence of their substrates. Using (HCO3-)-C-13 in the presence of sulphide, or (CH4)-C-13, we monitored carbon assimilation by the endosymbionts and its translocation to symbiont-free mussel tissues. Carbon was incorporated from methane and sulphide- oxidized inorganic carbon at rates 3 to 10 times slower in the host muscle tissue than in the symbiont-containing gill tissue. Both symbionts thus contribute actively to B. azoricus nutrition and adapt to the availability of their substrates. Further experiments with varying substrate concentrations using the same set-up should provide useful tools to study and even model the effects of changes in hydrothermal fluids on B. azoricus' chemosynthetic nutrition.
PY 2008
PD DEC
SO Biogeosciences
SN 1726-4170
PU Copernicus Gesellschaft Mbh
VL 5
IS 6
UT 000262411100017
BP 1681
EP 1691
DI 10.5194/bg-5-1681-2008
ID 31865
ER

EF