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Spatial and seasonal contrasts of sedimentary organic matter in floodplain lakes of the central Amazon basin

dc.rights.licenseopenen_US
hal.structure.identifierUniversidade Federal Fluminense [Rio de Janeiro] [UFF]
dc.contributor.authorSOBRINHO, R.
hal.structure.identifierUniversidade Federal Fluminense [Rio de Janeiro] [UFF]
dc.contributor.authorBERNARDES, M
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorABRIL, Gwenaël
hal.structure.identifierHanyang University
dc.contributor.authorKIM, J-H
hal.structure.identifierRoyal Netherlands Institute for Sea Research [NIOZ]
dc.contributor.authorZELL, C.
hal.structure.identifierInstitut des Sciences de l'Evolution de Montpellier [UMR ISEM]
dc.contributor.authorMORTILLARO, J. M.
hal.structure.identifierBiologie des Organismes et Ecosystèmes Aquatiques [BOREA]
dc.contributor.authorMEZIANE, T.
hal.structure.identifierGéosciences Environnement Toulouse [GET]
hal.structure.identifierInstitut de Recherche pour le Développement [IRD]
dc.contributor.authorMOREIRA-TURCQ, P.
hal.structure.identifierRoyal Netherlands Institute for Sea Research [NIOZ]
hal.structure.identifierUniversiteit Utrecht / Utrecht University [Utrecht]
dc.contributor.authorSINNINGHE DAMSTÉ, J.
dc.date.accessioned2024-10-11T07:11:28Z
dc.date.available2024-10-11T07:11:28Z
dc.date.issued2016
dc.identifier.issn1726-4170en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/202415
dc.description.abstractEnIn this study, we investigated the seasonal and spatial pattern of sedimentary organic matter (SOM) in five floodplain lakes of the central Amazon basin (Cabaliana, Janauaca, Canaçari, Mirituba and Curuai) which have different morphologies, hydrodynamics and vegetation cover-ages. Surface sediments were collected in four hydrological seasons: low water (LW), rising water (RW), high water (HW) and falling water (FW) in 2009 and 2010. We investigated commonly used bulk geochemical tracers such as the C : N ratio and the stable isotopic composition of organic carbon (δ 13 C org). These results were compared with lignin phenol parameters as an indicator of vascular plant detritus and branched glycerol dialkyl glycerol tetraethers (brGDGTs) to trace the input of soil organic matter (OM) from land to the aquatic settings. We also applied the crenarchaeol as an indicator of aquatic (rivers and lakes) OM. Our data showed that during the RW and FW seasons, the surface sediments were enriched in lignin and brGDGTs in comparison to other seasons. Our study also indicated that floodplain lake sediments primarily consisted of allochthonous, C 3 plant-derived OM. However, a downstream increase in C 4 macrophyte-derived OM contribution was observed along the gradient of increasing open waters-i.e., from upstream to downstream. Accordingly , we attribute the temporal and spatial difference in SOM composition to the hydrological dynamics between the floodplain lakes and the surrounding flooded forests.
dc.language.isoENen_US
dc.rightsAttribution 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/us/*
dc.title.enSpatial and seasonal contrasts of sedimentary organic matter in floodplain lakes of the central Amazon basin
dc.typeArticle de revueen_US
dc.identifier.doi10.5194/bg-13-467-2016en_US
dc.subject.halSciences de l'environnementen_US
dc.subject.halPlanète et Univers [physics]en_US
bordeaux.journalBiogeosciencesen_US
bordeaux.page467-482en_US
bordeaux.volume13en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue2en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamTGMen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-01913414
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccCC BYen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Biogeosciences&rft.date=2016&rft.volume=13&rft.issue=2&rft.spage=467-482&rft.epage=467-482&rft.eissn=1726-4170&rft.issn=1726-4170&rft.au=SOBRINHO,%20R.&BERNARDES,%20M&ABRIL,%20Gwena%C3%ABl&KIM,%20J-H&ZELL,%20C.&rft.genre=article


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