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Registros recuperados: 8
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Chemical and thermal description of the environment of the Genesis hydrothermal vent community (13 degrees N, EPR) 5
Sarradin, Pierre-marie; Caprais, Jean-claude; Briand, Patrick; Gaill, Françoise; Shillito, Bruce; Desbruyeres, Daniel.
The objective of this study is to describe the chemical and physical environment surrounding the vent organisms at the Genesis site (EPR, 2640 m). The main chimney is colonized by Riftia pachyptila, fishes Zoarcidae and crabs Bythograeidae. The top of the smoker is covered with tubes of polychaetes Alvinellidae, the frontier zone by limpet gastropods. Temperature measurements and water sampling were made on an axis along the chimney. The environment was characterized using relationships between chemical concentrations and temperature to provide a chemo-thermal model of the site. Discrete temperature ranges were 1-1.6 degrees C in sea water, 1.6-10 degrees C among Riftia plumes (up to 25 degrees C at the tube base), 7-91 degrees C close to the alvinellid...
Tipo: Text Palavras-chave: Hydrothermal ecosystem; Hydrogen sulphide; Carbon dioxide; Temperature.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00186/29764/28200.pdf
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Community dynamics over a decadal scale at Logatchev, 14 degrees 45 ' N, Mid-Atlantic Ridge 5
Gebruk, Andrey; Fabri, Marie-claire; Briand, Patrick; Desbruyeres, Daniel.
Hydrothermal vent community dynamics over a ten year span was studied in the Logatchev area, 14 degrees 45'N on the Mid-Atlantic Ridge. On the SERPENTINE cruise in March 2007 with the RN Pourquoi pas? and the ROV Victor 6000 (IFREMER), composition, abundance and distribution of dominant megafauna at Logatchev were examined and compared to published data from 1997. Our results revealed notable changes in several community characteristics. The most significant changes evident in March 2007 compared to July 1997 were the increase up to by order of magnitude in the population density of predatory gastropods Phymorchynchus spp. at the site Irina-2 and disappearance of a live population of vesicomyids at the site Anya's Garden. Other notable differences between...
Tipo: Text Palavras-chave: Hydrothermal vent; Community dynamics; Succession; Phymorchynchus; Bathymodiolus puteoserpentis; Vesicomyids; Logatchev; Mid-Atlantic Ridge.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00019/13044/10156.pdf
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Community structure and temperature dynamics within a mussel assemblage on the Southern East Pacific Rise 5
Sarrazin, Jozee; Walter, Cecile; Sarradin, Pierre-marie; Brind'Amour, Anik; Desbruyeres, Daniel; Briand, Patrick; Fabri, Marie-claire; Van Gaever, S; Vanreusel, A; Bachraty, Charleyne; Thiebaut, E.
The composition, biomass and diversity of the fauna in a Bathymodiolus thermophilus mussel assemblage colonizing diffuse flow areas on the SEPR is described and compared with biological characteristics of other hydrothermal assemblages. The spatio-temporal dynamics of temperatures over fine scales within the mussel habitat are characterized using newly-developed statistical approaches. Temperature data obtained from two adjacent habitats (a cirriped assemblage and a bare substratum) are compared. The results of the temperature data show that the mean temperature and the temperature variations were significantly higher in the mussel assemblage (mean temperature: 4.12 +/- 1.85 degrees C) in comparison with 2.40 +/- 0.14 degrees C in the cirriped assemblage...
Tipo: Text Palavras-chave: East Pacific Rise; Temperature dynamics; Biomass; Diversity; Bathymodiolus thermophilus; Mussel assemblage; Hydrothermal vents.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-3570.pdf
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Export of deep-sea hydrothermal particles, indigenous thermophilic microorganisms and larvae to the surrounding Ocean 5
Lesongeur, Francoise; Briand, Patrick; Godfroy, Anne; Crassous, Philippe; Byrne, Nathalie; Khripounoff, Alexis.
To assess the production and the export of particulate and biological material in deep-sea hydrothermal vents, four moorings with sediment traps and current meters were deployed for 24 days in the Azores Triple Junction (ATJ) region. They were deployed along an axis starting at the base of a hydrothermal vent chimney and ending 1000 m away. The particles sampled at the base of the chimney were characterized by high concentrations in total sulfur (16%) and iron (4%). The particle composition changed drastically with distance from the vent: the sulfur concentration decreased with an increase in clay components. Thermophilic microorganisms were successfully enriched from all the particle samples. Cultured strains were closely related to hydrothermal species,...
Tipo: Text Palavras-chave: Deep-sea hydrothermal vents; Particle flux; Hydrothermal microorganisms; Larvae; Regional index: North Atlantic; Mid-Atlantic Ridge; Azores Triple Junction.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00230/34111/33046.pdf
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First record of the deep-sea eel Ilyophis saldanhai (Synaphobranchidae, Anguilliformes) from the Pacific Ocean 5
Causse, Romain; Biscoito, M; Briand, Patrick.
First record of the deep-sea eel Ilyophis saldanhai (Synaphobranchidae, Anguilliformes) from the Pacific Ocean.
Tipo: Text Palavras-chave: New record; Hydrothermal vent; South East Pacific Ridge; PSE; Ilyophis saldanhai; Synaphobranchidae.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-1117.pdf
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HOT 96 News 5
Gaill, Francoise; Felbeck, Horst; Desbruyeres, Daniel; Lallier, Francois; Toulmond, A.; Alayse, Anne-marie; Briand, Patrick; Brulport, Jean-pierre; Caprais, Jean-claude; Chevaldonne, P.; Coail, Jean-yves; Cosson, R.; Crassous, Philippe; Delachambre, J.; Durif, C.; Echardour, L.; Herve, G.; Hourdez, Stephane; Jollivet, D.; Kerdoncuff, Jacques; Khripounoff, Alexis; Lechaire, J.p.; Pruski, Audrey; Ravaux, Juliette; Sarradin, Pierre-marie; Shillito, Bruce; Toullec, J.y.; Arndt, C.; Fisher, C.; Lutz, Richard; Childress, J..
Tipo: Text
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00179/29003/27431.pdf
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New information on the ecology of deep-sea vent communities in the azores triple junction area : preliminery results of the Diva 2 cruise (May 31-July 4, 1994) 5
Desbruyeres, Daniel; Alayse, Anne-marie; Antoine, Elisabeth; Barbier, Georges; Barriga, Fjas; Biscoito, Manuel; Briand, Patrick; Brulport, Jean-pierre; Comtet, Thierry; Cornec, Laurence; Crassous, Philippe; Dando, Paul; Fabri, Marie-claire; Felbeck, Horst; Lallier, Francois; Fiala Medioni, Aline; Goncalves, Joao; Menard, Frederic; Kerdoncuff, Jacques; Patching, John; Saldanha, Luis; Sarradin, Pierre-marie.
Tipo: Text
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00179/29005/27432.pdf
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The hydrothermal vent community of a new deep-sea field, Ashadze-1, 12°58'N on the Mid-Atlantic Ridge 5
Fabri, Marie-claire; Bargain, Annaelle; Briand, Patrick; Gebruk, A.; Fouquet, Yves; Morineaux, Marie; Desbruyeres, Daniel.
Ashadze-1 (128 580N 448 510W, 4080 m) on the Mid-Atlantic Ridge (MAR) is the deepest known ctive hydrothermal vent ield. The first observations on this site were numerous clear and black smokers and surprisingly few nown symbiotic species ominant in other vent areas on the MAR. The species most abundant at Ashadze-1 are those usually ound at the periphery f hydrothermal communities: sea-anemones Maractis rimicarivora and chaetopterid polychaetes hyllochaetopterus sp. ov. This study comprised site mapping and faunal sampling and Ashadze-1 was completely mapped y using the Remote perated Vehicle ‘Victor 6000’ and a new high resolution tool available for deep-sea research. A photo-mapping survey was carried out with a long range optical black and white...
Tipo: Text Palavras-chave: Hydrothermal vent; Mid-Atlantic Ridge; Maractis rimicarivora; Isotopes.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00004/11565/11356.pdf
Registros recuperados: 8
Primeira ... 1 ... Última
 

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