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The Congolobe project, a multidisciplinary study of Congo deep-sea fan lobe complex: Overview of methods, strategies, observations and sampling
dc.rights.license | open | en_US |
hal.structure.identifier | Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE] | |
hal.structure.identifier | Océan et Interfaces [OCEANIS] | |
dc.contributor.author | RABOUILLE, C. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | OLU, K. | |
hal.structure.identifier | Evolution et Modélisation des Bassins Sédimentaires [EMBS] | |
hal.structure.identifier | Institut des Sciences de la Terre de Paris [iSTeP] | |
dc.contributor.author | BAUDIN, François | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | KHRIPOUNOFF, A. | |
hal.structure.identifier | Unité Géosciences Marines [GM] | |
dc.contributor.author | DENNIELOU, B. | |
hal.structure.identifier | Laboratoire de Microbiologie des Environnements Extrêmophiles [LM2E] | |
dc.contributor.author | ARNAUD-HAOND, S. | |
hal.structure.identifier | Domaines Océaniques [LDO] | |
dc.contributor.author | BABONNEAU, Nathalie | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | BAYLE, C. | |
hal.structure.identifier | School of Earth and Atmospheric Sciences [Atlanta] | |
dc.contributor.author | BECKLER, J. | |
hal.structure.identifier | Laboratoire de Microbiologie des Environnements Extrêmophiles [LM2E] | |
dc.contributor.author | BESSETTE, S. | |
hal.structure.identifier | Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE] | |
hal.structure.identifier | Océan et Interfaces [OCEANIS] | |
dc.contributor.author | BOMBLED, B. | |
hal.structure.identifier | Laboratoire d'Ecogéochimie des environnements benthiques [LECOB] | |
dc.contributor.author | BOURGEOIS, S. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | BRANDILY, C. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | CAPRAIS, J.C. | |
hal.structure.identifier | Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE] | |
dc.contributor.author | CATHALOT, C. | |
hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
dc.contributor.author | CHARLIER, Karine | |
hal.structure.identifier | Laboratoire des Sciences de l'Environnement Marin (LEMAR) [LEMAR] | |
dc.contributor.author | CORVAISIER, Rudolph | |
hal.structure.identifier | Unité Géosciences Marines [GM] | |
dc.contributor.author | CROGUENNEC, C. | |
hal.structure.identifier | Laboratoire de Microbiologie des Environnements Extrêmophiles [LM2E] | |
dc.contributor.author | CRUAUD, P. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | DECKER, C. | |
hal.structure.identifier | Domaines Océaniques [LDO] | |
dc.contributor.author | DROZ, Laurence | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | GAYET, N. | |
hal.structure.identifier | Laboratoire de Microbiologie des Environnements Extrêmophiles [LM2E] | |
dc.contributor.author | GODFROY, A. | |
hal.structure.identifier | Adaptation et Biologie des Invertébrés en Conditions Extrêmes [ABICE] | |
dc.contributor.author | HOURDEZ, S. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | LE BRUCHEC, J. | |
hal.structure.identifier | Unité Géosciences Marines [GM] | |
dc.contributor.author | LE SAOUT, J. | |
hal.structure.identifier | Unité Géosciences Marines [GM] | |
dc.contributor.author | LESAOUT, M. | |
hal.structure.identifier | Laboratoire de Microbiologie des Environnements Extrêmophiles [LM2E] | |
dc.contributor.author | LESONGEUR, F. | |
hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
dc.contributor.author | MARTINEZ, P. | |
hal.structure.identifier | Laboratoire d'Ecogéochimie des environnements benthiques [LECOB] | |
dc.contributor.author | MEJANELLE, L. | |
hal.structure.identifier | Hellenic Centre for Marine Research [HCMR] | |
dc.contributor.author | MICHALOPOULOS, P. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | MOUCHEL, O. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | NOEL, P. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | PASTOR, L. | |
hal.structure.identifier | Domaines Océaniques [LDO] | |
dc.contributor.author | PICOT, M. | |
hal.structure.identifier | Laboratoire de Microbiologie des Environnements Extrêmophiles [LM2E] | |
dc.contributor.author | PIGNET, P. | |
hal.structure.identifier | Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE] | |
dc.contributor.author | POZZATO, L. | |
hal.structure.identifier | Laboratoire d'Ecogéochimie des environnements benthiques [LECOB] | |
dc.contributor.author | PRUSKI, A.M. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | RABILLER, M. | |
hal.structure.identifier | Laboratoire des Sciences de l'Environnement Marin (LEMAR) [LEMAR] | |
dc.contributor.author | RAIMONET, Mélanie | |
hal.structure.identifier | Laboratoire des Sciences de l'Environnement Marin (LEMAR) [LEMAR] | |
dc.contributor.author | RAGUENEAU, Olivier | |
hal.structure.identifier | Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE] | |
hal.structure.identifier | Océan et Interfaces [OCEANIS] | |
dc.contributor.author | REYSS, J.L. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | RODIER, P. | |
hal.structure.identifier | Unité Géosciences Marines [GM] | |
dc.contributor.author | RUESCH, B. | |
hal.structure.identifier | Unité Géosciences Marines [GM] | |
dc.contributor.author | RUFFINE, L. | |
hal.structure.identifier | Institut des Sciences de la Terre de Paris [iSTeP] | |
dc.contributor.author | SAVIGNAC, Florence | |
hal.structure.identifier | Laboratoire d'Ecogéochimie des environnements benthiques [LECOB] | |
dc.contributor.author | SENYARICH, C. | |
hal.structure.identifier | Institut des Sciences de la Terre de Paris [iSTeP] | |
dc.contributor.author | SCHNYDER, Johann | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | SEN, A. | |
hal.structure.identifier | Institut des Sciences de la Terre de Paris [iSTeP] | |
dc.contributor.author | STETTEN, E. | |
hal.structure.identifier | Department of Marine Sciences [Athens] | |
dc.contributor.author | SUN, Ming Yi | |
hal.structure.identifier | School of Earth and Atmospheric Sciences [Atlanta] | |
dc.contributor.author | TAILLEFERT, M. | |
hal.structure.identifier | Centre of Marine Sciences [Faro] [CCMAR] | |
dc.contributor.author | TEIXEIRA, S. | |
hal.structure.identifier | Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE] | |
hal.structure.identifier | Géochrononologie Traceurs Archéométrie [GEOTRAC] | |
dc.contributor.author | TISNERAT-LABORDE, N. | |
hal.structure.identifier | Laboratoire de Microbiologie des Environnements Extrêmophiles [LM2E] | |
dc.contributor.author | TOFFIN, L. | |
hal.structure.identifier | Laboratoire Environnement Profond [LEP] | |
dc.contributor.author | TOUROLLE, J. | |
hal.structure.identifier | Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE] | |
dc.contributor.author | TOUSSAINT, F. | |
hal.structure.identifier | Laboratoire d'Ecogéochimie des environnements benthiques [LECOB] | |
dc.contributor.author | VÉTION, G. | |
hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
dc.contributor.author | JOUANNEAU, J.M. | |
hal.structure.identifier | Centre scientifique et Technique Jean Feger [CSTJF] | |
dc.contributor.author | BEZ, M. | |
dc.date.accessioned | 2024-05-10T14:21:25Z | |
dc.date.available | 2024-05-10T14:21:25Z | |
dc.date.issued | 2017-08 | |
dc.identifier.issn | 0967-0645 | en_US |
dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/199748 | |
dc.description.abstractEn | The presently active region of the Congo deep-sea fan (around 330,000 km(2)), called the terminal lobes or lobe complex, covers an area of 2500 km(2) at 4700-5100 m water depth and 750-800 km offshore. It is a unique sedimentary area in the world ocean fed by a submarine canyon and a channel-levee system which presently deliver large amounts of organic carbon originating from the Congo River by turbidity currents. This particularity is due to the deep incision of the shelf by the Congo canyon, up to 30 km into the estuary, which funnels the Congo River sediments into the deep-sea. The connection between the river and the canyon is unique for major world rivers.In 2011, two cruises (WACS leg 2 and Congolobe) were conducted to simultaneously investigate the geology, organic and inorganic geochemistry, and micro- and macro-biology of the terminal lobes of the Congo deep-sea fan. Using this multidisciplinary approach, the morpho-sedimentary features of the lobes were characterized along with the origin and reactivity of organic matter, the recycling and burial of biogenic compounds, the diversity and function of bacterial and archaeal communities within the sediment, and the biodiversity and functioning of the faunal assemblages on the seafloor. Six different sites were selected for this study: Four distributed along the active channel from the lobe complex entrance to the outer rim of the sediment deposition zone, and two positioned cross-axis and at increasing distance from the active channel, thus providing a gradient in turbidite particle delivery and sediment age.This paper aims to provide the general context of this multidisciplinary study. It describes the general features of the site and the overall sampling strategy and provides the initial habitat observations to guide the other in-depth investigations presented in this special issue. Detailed bathymetry of each sampling site using 0.1-1 m resolution multibeam obtained with a remotely operated vehicle (ROV) shows progressive widening and smoothing of the channel-levees with increasing depth and reveals a complex morphology with channel bifurcations, erosional features and massive deposits. Dense ecosystems surveyed in the study area gather high density clusters of two large-sized species of symbiotic Vesicomyidae bivalves and microbial mats. These assemblages, which are rarely observed in sedimentary zones, resemble those based on chemosynthesis at cold-seep sites, such as the active pockmarks encountered along the Congo margin, and share with these sites the dominant vesicomyid species Christineconcha regab. Sedimentation rates estimated in the lobe complex range between 0.5 and 10 cm yr(-1), which is 2-3 orders of magnitude higher than values generally encountered at abyssal depths. The bathymetry, faunal assemblages and sedimentation rates make the Congo lobe complex a highly peculiar deep-sea habitat driven by high inputs of terrigenous material delivered by the Congo channel-levee system. | |
dc.description.sponsorship | Transfert de carbone organique et fonctionnement des écosystèmes dans les lobes terminaux de l'éventail sous-marin du Congo | en_US |
dc.language.iso | EN | en_US |
dc.subject.en | Chemosynthetic habitats | |
dc.subject.en | Congo deep-sea fan | |
dc.subject.en | Vesicomyidae | |
dc.subject.en | Fine sediment | |
dc.subject.en | Sedimentation rate | |
dc.subject.en | Seafloor morphology | |
dc.subject.en | Turbidite | |
dc.subject.en | ACL | |
dc.title.en | The Congolobe project, a multidisciplinary study of Congo deep-sea fan lobe complex: Overview of methods, strategies, observations and sampling | |
dc.type | Article de revue | en_US |
dc.identifier.doi | 10.1016/j.dsr2.2016.05.006 | en_US |
dc.subject.hal | Sciences de l'environnement | en_US |
dc.subject.hal | Sciences de l'environnement/Biodiversité et Ecologie | en_US |
dc.subject.hal | Planète et Univers [physics]/Océan, Atmosphère | en_US |
bordeaux.journal | Deep Sea Research Part II: Topical Studies in Oceanography | en_US |
bordeaux.page | 7-24 | en_US |
bordeaux.volume | 142 | en_US |
bordeaux.hal.laboratories | EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805 | en_US |
bordeaux.institution | Université de Bordeaux | en_US |
bordeaux.institution | CNRS | en_US |
bordeaux.team | PALEO | en_US |
bordeaux.peerReviewed | oui | en_US |
bordeaux.inpress | non | en_US |
bordeaux.import.source | hal | |
hal.identifier | hal-01319092 | |
hal.version | 1 | |
hal.popular | non | en_US |
hal.audience | Internationale | en_US |
hal.export | false | |
workflow.import.source | hal | |
dc.rights.cc | Pas de Licence CC | en_US |
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