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| Gaill, F; Desbruyeres, Daniel; Prieur, D. |
| A morphological study of bacteria associated with the “Pompei worm,”Alvinella pompejana, collected from East Pacific rise hydrothermal vents, revealed four types of epidermal associations on the dorsal part of the animals: various single cells distributed on the animal tegument; clump-like associations located in the intertegumentary spaces; and filamentous bacteria associated with epidermal expansions, or inserted on the posterior parapodia. The bacterial morphologies were illustrated by SEM and TEM pictures and compared to bacteria previously described. The functional significance of these associations is discussed. |
| Tipo: Text |
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| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00155/26658/24855.pdf |
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| Fera, P; Prieur, D. |
| Before the building of an (OTEC) power plant, and experimental station was built near the entrance of the Bay of Brest in order to do preliminary studies. Using these facilities, the bacterial colonization of three substrata (stainless steel UB6, aluminium AG4, polycarbonate filters) was studied in an open seawater system, with a speed of 0,7 m s super(-1). The study was performed between May 1983 and May 1984, including seven experiments of 15 days each. Bacteria colonizing the metallic surfaces were counted by scanning electron microscopy, and bacteria colonizing the polycarbonate filters counted by epifluorescence microscopy. On the three substrata, bacterial colonization occurred in three successive stages: initial colonization, sometimes unsteady... |
| Tipo: Text |
Palavras-chave: Fouling; OTEC plants; Bacteria; Colonization; Adhesion; Microbiological analysis; Surface films. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-964.pdf |
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| Roussel, Erwan; Cambon-bonavita, Marie-anne; Querellou, Joel; Cragg, B; Webster, G; Prieur, D; Parkes, R. |
| Sub-sea-floor sediments may contain two-thirds of Earth's total prokaryotic biomass. However, this has its basis in data extrapolation from ~500-meter to 4-kilometer depths, whereas the deepest documented prokaryotes are from only 842 meters. Here, we provide evidence for low concentrations of living prokaryotic cells in the deepest (1626 meters below the sea floor), oldest (111 million years old), and potentially hottest (~100°C) marine sediments investigated. These Newfoundland margin sediments also have DNA sequences related to thermophilic and/or hyperthermophilic Archaea. These form two unique clusters within Pyrococcus and Thermococcus genera, suggesting unknown, uncultured groups are present in deep, hot, marine sediments (~54° to 100°C). Sequences... |
| Tipo: Text |
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| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4209.pdf |
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| Elsgaard, L; Guezennec, J; Benbouzidrollet, N; Prieur, D. |
| The present study was conducted to determine the presence and physiology of mesophilic sulfate-reducing bacteria (SRB) at deep-sea hydrothermal vents, which constitute remote ecosystems, largely dependent on their own chemoautotrophic primary production. SRB were enriched and isolated from samples of hydrothermal water, invertebrates, chimneys, and sediment collected at deep-sea (1700 to 2600 m) hydrothermal vent sites in the Lau Basin, in the North Fiji Basin, and at 13 degrees N on the East Pacific Rise. From the hydrothermal fields in the Lau Basin and the North Fiji Basin, SRB were cultured at 30 degrees C from 19 out of 21 samples, including five samples of high-temperature hydrothermal water (> 100 degrees C). Acetate, benzoate, formate,... |
| Tipo: Text |
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| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00097/20861/18479.pdf |
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