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Provedor de dados:  ArchiMer
País:  France
Título:  Structure and Drivers of Cold Seep Ecosystems
Autores:  Foucher, Jean-paul
Westbrook, Graham K.
Boetius, Antje
Ceramicola, Silvia
Dupre, Stephanie
Mascle, Jean
Mienert, Jurgen
Pfannkuche, Olaf
Pierre, Catherine
Praeg, Daniel
Data:  2009-03
Ano:  2009
Palavras-chave:  Mosby mud volcano
Deep sea fan
Eastern mediterranean sea
Black sea
Anaerobic oxidation
Hydrocarbon seeps
Carbonate crusts
Sidescan sonar
Hydrate ridge
Gas chimneys
Resumo:  Submarine hydrocarbon seeps are geologically driven "hotspots" of increased biological activity on the seabed. As part of the HERMES project, several sites of natural hydrocarbon seepage in the European seas were investigated in detail, including mud volcanoes and pockmarks, in study areas extending from the Nordic margin, to the Gulf of Cadiz, to the Mediterranean and Black seas. High-resolution seabed maps and the main properties of key seep sites are presented here. Individual seeps show ecosystem zonation related to the strength of the methane flux and distinct biogeochemical processes in surface sediments. A feature common to many seeps is the formation of authigenic carbonate constructions. These constructions exhibit various morphologies ranging from large pavements and fragmented slabs to chimneys and mushroom-shaped mounds, and they form hard substrates colonized by fixed fauna. Gas hydrate dissociation could contribute to sustain seep chemosynthetic communities over several thousand years following large gas-release events.
Tipo:  Text
Idioma:  Inglês

Editor:  The Oceanography Society
Formato:  application/pdf
Fonte:  Oceanography (1042-8275) (The Oceanography Society), 2009-03 , Vol. 22 , N. 1 , P. 92-109
Direitos:  2009 by The Oceanography Society. All rights reserved. Permission is granted to copy this article for use in teaching and research. Republication, systemmatic reproduction, or collective redistirbution of any portion of this article by photocopy machine, reposting, or other means is permitted only with the approval of The Oceanography Society. Send all correspondence to: or The Oceanography Society, PO Box 1931, Rockville, MD 20849-1931, USA.


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