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| Riou, V.; Halary, S.; Duperron, S.; Bouillon, S.; Elskens, M.; Bettencourt, R.; Santos, R. S.; Dehairs, F.; Colaco, A.. |
| 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... |
| Tipo: Text |
Palavras-chave: Mid-atlantic ridge; Hydrocarbon-seep mussel; Deep-sea mussels; Hydrothermal-vent; Puteoserpentis bivalvia; Mytilidae; Methane; Endosymbionts; Bacteria; Metabolism. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/00207/31865/30271.pdf |
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| Cherkashov, G.; Poroshina, I.; Stepanova, T.; Ivanov, V.; Bel'Tenev, V.; Lazareva, L.; Rozhdestvenskaya, I.; Samovarov, M.; Shilov, V.; Glasby, G. P.; Fouquet, Yves; Kuznetsov, V.. |
| In addition to the two new hydrothermal fields Krasnov (l6 degrees 38' N) and Ashadze (13 degrees N) discovered in 2003-2004, some later discoveries were made in the Northern Equatorial segment of the Mid-Atlantic Ridge (MAR). Two new major seafloor massive sulfide (SMS) deposits: Semyenov (13 degrees 31' N) and Zenith-Victory (20 degrees 08' N), as well as the now extended Puy des Folles hydrothermal field (20 degrees 30.5' N), provide enough data to make conclusions about the general characteristics of SMS deposits in the northern equatorial MAR environment. Parameters of SMS deposits, such as their distribution, geological setting, morphology, composition and age, are discussed in this paper. A majority of studied SMS deposits (Ashadze, Logatchev,... |
| Tipo: Text |
Palavras-chave: Hydrothermal systems; Mid-atlantic ridge; Seafloor massive sulfides. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00013/12413/9800.pdf |
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