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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.licenseopenen_US
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierOcéan et Interfaces [OCEANIS]
dc.contributor.authorRABOUILLE, C.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorOLU, K.
hal.structure.identifierEvolution et Modélisation des Bassins Sédimentaires [EMBS]
hal.structure.identifierInstitut des Sciences de la Terre de Paris [iSTeP]
dc.contributor.authorBAUDIN, François
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorKHRIPOUNOFF, A.
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorDENNIELOU, B.
hal.structure.identifierLaboratoire de Microbiologie des Environnements Extrêmophiles [LM2E]
dc.contributor.authorARNAUD-HAOND, S.
hal.structure.identifierDomaines Océaniques [LDO]
dc.contributor.authorBABONNEAU, Nathalie
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorBAYLE, C.
hal.structure.identifierSchool of Earth and Atmospheric Sciences [Atlanta]
dc.contributor.authorBECKLER, J.
hal.structure.identifierLaboratoire de Microbiologie des Environnements Extrêmophiles [LM2E]
dc.contributor.authorBESSETTE, S.
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierOcéan et Interfaces [OCEANIS]
dc.contributor.authorBOMBLED, B.
hal.structure.identifierLaboratoire d'Ecogéochimie des environnements benthiques [LECOB]
dc.contributor.authorBOURGEOIS, S.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorBRANDILY, C.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorCAPRAIS, J.C.
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
dc.contributor.authorCATHALOT, C.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCHARLIER, Karine
hal.structure.identifierLaboratoire des Sciences de l'Environnement Marin (LEMAR) [LEMAR]
dc.contributor.authorCORVAISIER, Rudolph
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorCROGUENNEC, C.
hal.structure.identifierLaboratoire de Microbiologie des Environnements Extrêmophiles [LM2E]
dc.contributor.authorCRUAUD, P.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorDECKER, C.
hal.structure.identifierDomaines Océaniques [LDO]
dc.contributor.authorDROZ, Laurence
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorGAYET, N.
hal.structure.identifierLaboratoire de Microbiologie des Environnements Extrêmophiles [LM2E]
dc.contributor.authorGODFROY, A.
hal.structure.identifierAdaptation et Biologie des Invertébrés en Conditions Extrêmes [ABICE]
dc.contributor.authorHOURDEZ, S.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorLE BRUCHEC, J.
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorLE SAOUT, J.
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorLESAOUT, M.
hal.structure.identifierLaboratoire de Microbiologie des Environnements Extrêmophiles [LM2E]
dc.contributor.authorLESONGEUR, F.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMARTINEZ, P.
hal.structure.identifierLaboratoire d'Ecogéochimie des environnements benthiques [LECOB]
dc.contributor.authorMEJANELLE, L.
hal.structure.identifierHellenic Centre for Marine Research [HCMR]
dc.contributor.authorMICHALOPOULOS, P.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorMOUCHEL, O.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorNOEL, P.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorPASTOR, L.
hal.structure.identifierDomaines Océaniques [LDO]
dc.contributor.authorPICOT, M.
hal.structure.identifierLaboratoire de Microbiologie des Environnements Extrêmophiles [LM2E]
dc.contributor.authorPIGNET, P.
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
dc.contributor.authorPOZZATO, L.
hal.structure.identifierLaboratoire d'Ecogéochimie des environnements benthiques [LECOB]
dc.contributor.authorPRUSKI, A.M.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorRABILLER, M.
hal.structure.identifierLaboratoire des Sciences de l'Environnement Marin (LEMAR) [LEMAR]
dc.contributor.authorRAIMONET, Mélanie
hal.structure.identifierLaboratoire des Sciences de l'Environnement Marin (LEMAR) [LEMAR]
dc.contributor.authorRAGUENEAU, Olivier
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierOcéan et Interfaces [OCEANIS]
dc.contributor.authorREYSS, J.L.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorRODIER, P.
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorRUESCH, B.
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorRUFFINE, L.
hal.structure.identifierInstitut des Sciences de la Terre de Paris [iSTeP]
dc.contributor.authorSAVIGNAC, Florence
hal.structure.identifierLaboratoire d'Ecogéochimie des environnements benthiques [LECOB]
dc.contributor.authorSENYARICH, C.
hal.structure.identifierInstitut des Sciences de la Terre de Paris [iSTeP]
dc.contributor.authorSCHNYDER, Johann
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorSEN, A.
hal.structure.identifierInstitut des Sciences de la Terre de Paris [iSTeP]
dc.contributor.authorSTETTEN, E.
hal.structure.identifierDepartment of Marine Sciences [Athens]
dc.contributor.authorSUN, Ming Yi
hal.structure.identifierSchool of Earth and Atmospheric Sciences [Atlanta]
dc.contributor.authorTAILLEFERT, M.
hal.structure.identifierCentre of Marine Sciences [Faro] [CCMAR]
dc.contributor.authorTEIXEIRA, S.
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierGéochrononologie Traceurs Archéométrie [GEOTRAC]
dc.contributor.authorTISNERAT-LABORDE, N.
hal.structure.identifierLaboratoire de Microbiologie des Environnements Extrêmophiles [LM2E]
dc.contributor.authorTOFFIN, L.
hal.structure.identifierLaboratoire Environnement Profond [LEP]
dc.contributor.authorTOUROLLE, J.
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
dc.contributor.authorTOUSSAINT, F.
hal.structure.identifierLaboratoire d'Ecogéochimie des environnements benthiques [LECOB]
dc.contributor.authorVÉTION, G.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorJOUANNEAU, J.M.
hal.structure.identifierCentre scientifique et Technique Jean Feger [CSTJF]
dc.contributor.authorBEZ, M.
dc.date.accessioned2024-05-10T14:21:25Z
dc.date.available2024-05-10T14:21:25Z
dc.date.issued2017-08
dc.identifier.issn0967-0645en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/199748
dc.description.abstractEnThe 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.sponsorshipTransfert de carbone organique et fonctionnement des écosystèmes dans les lobes terminaux de l'éventail sous-marin du Congo - ANR-11-BS56-0030en_US
dc.language.isoENen_US
dc.subject.enChemosynthetic habitats
dc.subject.enCongo deep-sea fan
dc.subject.enVesicomyidae
dc.subject.enFine sediment
dc.subject.enSedimentation rate
dc.subject.enSeafloor morphology
dc.subject.enTurbidite
dc.subject.enACL
dc.title.enThe Congolobe project, a multidisciplinary study of Congo deep-sea fan lobe complex: Overview of methods, strategies, observations and sampling
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.dsr2.2016.05.006en_US
dc.subject.halSciences de l'environnementen_US
dc.subject.halSciences de l'environnement/Biodiversité et Ecologieen_US
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphèreen_US
bordeaux.journalDeep Sea Research Part II: Topical Studies in Oceanographyen_US
bordeaux.page7-24en_US
bordeaux.volume142en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-01319092
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
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