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Provedor de dados:  ArchiMer
País:  France
Título:  Dynamics of particulate organic matter composition in coastal systems: a spatio-temporal study at multi-systems scale
Autores:  Lienart, Camilla
Savoye, Nicolas
Bozec, Yann
Breton, Elsa
Conan, Pascal
David, Valerie
Feunteun, Eric
Grangere, Karine
Kerherve, Philippe
Lebreton, Benoit
Lefebvre, Sebastien
L'Helguen, Stephane
Mousseau, Laure
Raimbault, Patrick
Richard, Pierre
Riera, Pascal
Sauriau, Pierre-guy
Schaal, Gauthier
Aubert, Fabien
Aubin, Sebastien
Bichon, Sabrina
Boinet, Christophe
Bourasseau, Line
Breret, Martine
Caparros, Jocelyne
Cariou, Thierry
Charlier, Karine
Claquin, Pascal
Cornille, Vincent
Corre, Anne-marie
Costes, Laurence
Crispi, Olivier
Crouvoisier, Muriel
Czamanski, Marie
Del Amo, Yolanda
Derriennic, Herve
Dindinaud, Francois
Durozieri, Maia
Hanquiez, Vincent
Nowaczyk, Antoine
Devesa, Jeremy
Ferreira, Sophie
Fornier, Michel
Garcia, Fabrice
Garcia, Nicole
Geslin, Sandrine
Grossteffan, Emilie
Gueux, Aurore
Guillaudeau, Julien
Guillou, Gael
Joly, Orianne
Lachaussee, Nicolas
Lafont, Michel
Lamoureux, Jezabel
Lecuyer, Eric
Lehodey, Jean-paul
Lemeille, David
Leroux, Cedric
Mace, Eric
Maria, Eric
Pineau, Philippe
Petit, Franck
Pujo-pay, Mireille
Rimelin-maury, Peggy
Sultan, Emmanuelle
Data:  2017-08
Ano:  2017
Palavras-chave:  Particulate organic matter
Coastal systems
C and N stable isotopes
C:N ratio
Mixing model
Resumo:  In coastal systems, the multiplicity of sources fueling the pool of particulate organic matter (POM) leads to divergent estimations of POM composition. Eleven systems (two littoral systems, eight embayments and semi-enclosed systems and one estuary) distributed along the three maritime façades of France were studied for two to eight years in order to quantify the relative contribution of organic matter sources to the surface-water POM pool in coastal systems. This study was based on carbon and nitrogen elemental and isotopic ratios, used for running mixing models. The POM of the estuary is dominated by terrestrial material (93% on average), whereas the POM of the other systems is dominated by phytoplankton (84% on average). Nevertheless, for the latter systems, the POM composition varies in space, with 1) systems where POM is highly composed of phytoplankton (≥ 93%), 2) systems characterized by a non-negligible contribution of benthic (8 to 19%) and/or riverine (7 to 19%) sources, and 3) the Mediterranean systems characterized by the contribution of diazotroph organisms (ca. 14%). A continent-to-ocean gradient of riverine and/or benthic POM contribution is observed. Finally, time series reveal 1) seasonal variations of POM composition, 2) differences in seasonality between systems, and 3) an inshore-offshore gradient of seasonality within each system that were sampled at several stations. Spatial and seasonal patterns of POM composition are mainly due to local to regional processes such as hydrodynamics and sedimentary hydrodynamic (e.g. resuspension processes, changes in river flows, wind patterns influencing along-shore currents) but also due to the geomorphology of the systems (depth of the water column, distance to the shore). Future studies investigating the link between these forcings and POM composition would help to better understand the dynamics of POM composition in coastal systems.
Tipo:  Text
Idioma:  Inglês

Editor:  Pergamon-elsevier Science Ltd
Formato:  application/pdf
Fonte:  Progress In Oceanography (0079-6611) (Pergamon-elsevier Science Ltd), 2017-08 , Vol. 156 , P. 221-239
Direitos:  2017 Elsevier Ltd. All rights reserved.


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