Consulta: creatorFacets:"Breton, Elsa"
Registros recuperados: 7
Data/hora: 01/06/2024 01:04:51

Succession of primary producers and micrograzers in a coastal ecosystem dominated by Phaeocystis globosa blooms
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grattepanche, Jean-david; Breton, Elsa; Brylinski, Jean-michel; Lecuyer, Eric; Christaki, Urania.
The community structures and succession of phytoplankton, protozooplankton and copepods were studied from February 2007 to July 2009 in a coastal area of the eastern English Channel subject to Phaeocystis globosa blooms. While diatom blooms preceded P. globosa blooms each year, the community structure and stock of heterotrophic protists appeared to be related to the dominant P. globosa life cycle stages. In 2007, the dominance of large colonies (&gt; 100 mu m, up to 316 mu g C L(-1)), which resulted in a high biomass of healthy free cells (up to 132 mu g C L(-1)), accompanied high spirotrich ciliate stocks (up to 58 mu g C L(-1)) and high abundances of the copepods Acartia clausi and Temora longicornis (up to 11 ind. L(-1)). In 2008, the bloom which lasted...
Tipo: Text
Palavras-chave: Phaeocystis globosa; Diatoms; Micrograzer community; Eastern English Channel.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00373/48468/48714.pdf

Dynamics of particulate organic matter composition in coastal systems: a spatio-temporal study at multi-systems scale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
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.
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

Small-scale variability of protistan planktonic communities relative to environmental pressures and biotic interactions at two adjacent coastal stations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Genitsaris, Savvas; Monchy, Sebastien; Breton, Elsa; Lecuyer, Eric; Christaki, Urania.
The aim of this study was to analyze planktonic protistan assemblages under different environmental pressures at 2 adjacent coastal stations (inshore and offshore; similar to 6.4 km apart) in the eastern English Channel (EEC). Samples were collected between March 2012 and June 2013, and analyzed using bioinformatic analysis and tag pyrosequencing of the V2-V3 hypervariable region of the 18S rRNA gene. In addition to the taxonomic composition of the protistan communities, the detected operational taxonomic units (OTUs) were sorted into 6 major functional groups based on their trophic roles in marine systems. Comparisons of 13 environmental factors, including physical and chemical variables, indicated significant differences between the 2 stations. However,...
Tipo: Text
Palavras-chave: Unicellular eukaryotes; Community organization; Environmental parameters; Biotic interactions; 18S rRNA; Pyrosequencing; Bioinformatics; Ecological tools.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00373/48450/48765.pdf

Realized niche analysis of phytoplankton communities involving HAB: Phaeocystis spp. as a case study
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Karasiewicz, Stephane; Breton, Elsa; Lefebvre, Alain; Hernandez Farinas, Tania; Lefebvre, Sebastien.
The link between harmful algal blooms, phytoplankton community dynamics and global environmental change is not well understood. To tackle this challenging question, a new method was used to reveal how phytoplankton communities responded to environmental change with the occurrence of an harmful algae, using the coastal waters of the eastern English Channel as a case study. The great interannual variability in the magnitude and intensity of Phaeocystis spp. blooms, along with diatoms, compared to the ongoing gradual decrease in anthropogenic nutrient concentration and rebalancing of nutrient ratios; suggests that other factors, such as competition for resources, may also play an important role. A realized niche approach was used with the Outlying Mean Index...
Tipo: Text
Palavras-chave: Harmful algae bloom; WitOMI; Subniche; Diatoms; Biotic interaction; Eastern English Channel.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00416/52786/56650.pdf

Do Phaeocystis colony blooms affect zooplankton in the Belgian coastal zone?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Daro, Marie-hermande; Breton, Elsa; Antajan, Elvire; Gasparini, Stéphane; Lancelot, Christiane.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00083/19417/17028.pdf

Microplanktonic Community Structure in a Coastal System Relative to a Phaeocystis Bloom Inferred from Morphological and Tag Pyrosequencing Methods
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Monchy, Sebastien; Grattepanche, Jean-david; Breton, Elsa; Meloni, Dionigia; Sanciu, Giovanna; Chabe, Magali; Delhaes, Laurence; Viscogliosi, Eric; Sime-ngando, Telesphore; Christaki, Urania.
Background: Massive phytoplankton blooms, like the recurrent Phaeocystis proliferation observed every year in the Eastern English Channel (EEC), have a significant influence on the overall planktonic community structure and their food web dynamics. As well as being an important area for local fisheries, the EEC is an ideal ecosystem for work on microbial diversity. This is because, although its environmental context is relatively complex, it is reasonably well understood due to several years of monitoring and morphological observations of its planktonic organisms. The objective of our study was to better understand the under-explored microbial eukaryotic diversity relative to the Phaeocystis bloom. Methodology and Principal Findings: The community...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00373/48460/48724.pdf

Dynamics of particulate organic matter composition in coastal systems: forcing of spatio-temporal variability at multi-systems scale
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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