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Registros recuperados: 7
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Are epiphytes a significant component of intertidal Zostera noltii beds? ArchiMer
Lebreton, Benoit; Richard, Pierre; Radenac, Gilles; Bordes, Monique; Breret, Martine; Arnaud, Christophe; Mornet, Francoise; Blanchard, Gerard F..
The role of epiphytes in an intertidal Zostera noltii seagrass bed in Marennes-Oleron Bay was assessed in comparison with the other main benthic primary producers (Z. noltii, microphytobenthos) at two bathymetric levels and on a seasonal basis. Assemblage and biomass of epiphytes were studied using scanning electron microscopy (SEM). Z noltii and its detrital matter followed a typical seasonal pattern: microphytobenthos was present in large quantities throughout the year representing 21% of the total biomass while detrital matter, above-ground parts and below-ground parts accounted for 65, 9 and 5%, respectively. Only two species of epiphytic diatoms, Cocconeis scutellum and Cocconeis placentula, were observed on seagrass leaves. Epiphyte biomass was very...
Tipo: Text Palavras-chave: SEM; Cocconeis spp.; Epiphyte diatom; Microphytobenthos; Zostera noltii; Intertidal seagrass bed; Primary producer.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6589.pdf
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DCE-Benthos - Macroalgues Fixées, Sous-éléments de qualité "Macroalgues Subtidales (et faune associée)" et "Macroalgues Intertidales", Surveillance des MEC et MET du bassin Adour-Garonne, Année 2017 ArchiMer
Derrien-courtel, Sandrine; Aubert, Fabien; Breret, Martine; De Casamajor, Marie-noelle; Lissardy, Muriel; Nussbaumer, Marielle; Sanchez, Florence; Sauriau, Pierre-guy.
Tipo: Text
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00514/62585/66934.pdf
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Dynamics of particulate organic matter composition in coastal systems: a spatio-temporal study at multi-systems scale ArchiMer
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.
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...
Tipo: Text Palavras-chave: Particulate organic matter; Coastal systems; C and N stable isotopes; C:N ratio; Mixing model.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00374/48550/48871.pdf
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Dynamics of particulate organic matter composition in coastal systems: forcing of spatio-temporal variability at multi-systems scale ArchiMer
Lienart, Camilla; Savoye, Nicolas; David, Valerie; Ramond, Pierre; Tress, Paco Rodriguez; Hanquiez, Vincent; Marieu, Vincent; Aubert, Fabien; Aubin, Sebastien; Bichon, Sabrina; Boinet, Christophe; Bourasseau, Line; Bozec, Yann; Breret, Martine; Breton, Elsa; Caparros, Jocelyne; Cariou, Thierry; Claquin, Pascal; Conan, Pascal; Corre, Anne-marie; Costes, Laurence; Crouvoisier, Muriel; Del Amo, Yolanda; Derriennic, Herve; Dindinaud, Francois; Duran, Robert; Durozier, Maia; Devesa, Jeremy; Ferreira, Sophie; Feunteun, Eric; Garcia, Nicole; Geslin, Sandrine; Grossteffan, Emilie; Gueux, Aurore; Guillaudeau, Julien; Guillou, Gael; Jolly, Orianne; Lachaussee, Nicolas; Lafont, Michel; Lagadec, Veronique; Lamoureux, Jezabel; Lauga, Beatrice; Lebreton, Benoit; Lecuyer, Eric; Lehodey, Jean-paul; Leroux, Cedric; L'Helguen, Stephane; Mace, Eric; Maria, Eric; Mousseau, Laure; Nowaczyk, Antoine; Pineau, Philippe; Petit, Franck; Pujo-pay, Mireille; Raimbault, Patrick; Rimmelin-maury, Peggy; Rouaud, Vanessa; Sauriau, Pierre-guy; Sultan, Emmanuelle; Susperregui, Nicolas.
In costal systems, particulate organic matter (POM) results from a multiplicity of sources having their respective dynamics in terms of production, decomposition, transport and burial. The POM pool experiences thus considerable spatial and temporal variability. In order to better understand this variability, the present study employs statistical multivariate analyses to investigate links between POM composition and environmental forcings for a panel of twelve coastal systems distributed along the three maritime regions of France and monitored weekly to monthly for 1 to 8 years. At multi-system scale, two main gradients of POC composition have been identified: a ‘Continent-Ocean’ gradient associated with hydrodynamics, sedimentary dynamics and depth of the...
Tipo: Text Palavras-chave: Particulate organic matter; Coastal systems; Environmental forcing; Meta-analysis; France.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00433/54471/55848.pdf
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La Crépidule : identifier les mécanismes de sa prolifération et caractériser ses effets sur le milieu pour envisager sa gestion (Chantier : Baie de Marennes-Oléron) ArchiMer
Sauriau, Pierre-guy; De Montaudouin, Xavier; Gomez, Stéphane; Joassard, Lucette; Breret, Martine.
Les points forts des résultats acquis sur le chantier Marennes-Oléron au cours du programme LITEAU Crépidule sont énumérés : 1- Introduite dans le bassin de Marennes-Oléron à la fin des années soixante, Crepidula fornicata y a depuis colonisé principalement les bordures de chenaux et fonds subtidaux répondant à ses exigences écologiques. Ce nouveau biotope représente moins de 13% des surfaces de la baie pour un stock vivant ne dépassant pas quelques milliers de tonnes frais. De plus, du fait des opérations de nettoyage organisées depuis 1980 en baie de Marennes-Oléron, une relative stabilité du stock de crépidule est à noter dans cette baie depuis 25 ans. Ce n’est en revanche pas le cas du site de Fouras, où les opérations de nettoyage ne sont pas...
Tipo: Text
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00032/14293/11572.pdf
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Sequential resuspension of biofilm components (viruses, prokaryotes and protists) as measured by erodimetry experiments in the Brouage mudflat (French Atlantic coast) ArchiMer
Dupuy, Christine; Mallet, Clarisse; Guizien, Katell; Montanie, Helene; Breret, Martine; Mornet, Francoise; Fontaine, Camille; Nerot, Caroline; Orvain, Francis.
Resuspension thresholds in terms of friction velocity were experimentally quantified for the prokaryotes, protists and for the first time, viruses of intertidal mudflat biofilms. Differences in resuspension thresholds could be related to the type, behaviour and size of microorganisms and their association with particles. Free microorganisms (viruses, bacteria and some nanoflagellates) were resuspended by weak flow at friction velocities lower than 2 cm s- 1. Chlorophyll a, some nanoflagellates and attached bacteria were resuspended together with the bed’s muddy sediment, which required friction velocities larger than 3 cm s- 1. Diatoms smaller than 60 μm were resuspended at velocities between 3 and 5 cm s- 1, while those larger than 60 μm were resuspended...
Tipo: Text Palavras-chave: Viruses; Microorganisms; Resuspension; Benthic-pelagic coupling; Spatial distribution; Mudflat.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00168/27922/26196.pdf
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The spring mesozooplankton variability and its relationship with hydrobiological structure over year-to-year changes (2003–2013) in the southern Bay of Biscay (Northeast Atlantic) ArchiMer
Dessier, Aurelie; Bustamante, Paco; Chouvelon, Tiphaine; Huret, Martin; Pagano, Marc; Marquis, Elise; Rousseaux, Frederic; Pignon-mussaud, Cecilia; Mornet, Francoise; Breret, Martine; Dupuy, Christine.
Mesozooplankton can be considered the most important secondary producers in marine food webs because they hold an intermediate position between the phytoplankton assemblage and the upper trophic levels. They also are a robust indicator of climatic and hydrological conditions. We conducted an analysis of the interannual variability of the spring mesozooplankton assemblage, as sampled by the PELGAS fisheries survey in the southern part of the Bay of Biscay (Northeast Atlantic Ocean) between 2003 and 2013. We examined hydrology and trophic drivers to explain the variability. Our results revealed that the subsurface temperature, the subsurface salinity, the biomasses of subsurface pico-, nano-, and microphytoplankton, and the copepod assemblage exhibited a...
Tipo: Text
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00439/55010/56428.pdf
Registros recuperados: 7
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