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| Registros recuperados: 48 | |
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| Gohin, Francis; Saulquin, Bertrand; Oger-jeanneret, Helene; Lozac' H, L; Lampert, Luis; Lefebvre, Alain; Riou, Philippe; Bruchon, F. |
| The application of the new Water Framework Directive (WFD) of the European Union will require a dense and frequent monitoring of chlorophyll-a near the coast. Not counting the transitional water bodies located in the vicinity of estuaries, not less than seventy four coastal water bodies have to be monitored along the coast of the French Atlantic continental shelf and the English Channel. All the available data have to be gathered to implement a comprehensive monitoring scheme. To this purpose, we evaluate the capacity of ocean colour imagery to complete the conventional in situ data set collected in coastal networks. Satellite-derived chlorophyll-a concentration is obtained by the application of a coastal Look-Up-Table to water-leaving radiance of the... |
| Tipo: Text |
Palavras-chave: SeaWiFS; Coastal; Surveillance; Monitoring; Chlorophyll; Satellite. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4501.pdf |
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| Menet-nedelec, Florence; Ropert, Marion; Riou, Philippe; Courtay, Gaelle; Fontaine, Bruno; Francoise, Sylvaine; Jacqueline, Franck; Lesaulnier, Nadine; Louis, Fabienne; Maheux, Frank; Pierre-duplessix, Olivier; Rabiller, Emilie; Schapira, Mathilde; Simon, Benjamin. |
| La stratégie d’échantillonnage optimisée du Réseau Hydrologique Littoral Normand (RHLN) a été approuvée en 2007 par ses partenaires, avec le triple objectif (1) d’observer les niveaux d’eutrophisation et les phénomènes associés pour comprendre leur déclenchement et évolution ; (2) d’évaluer la qualité des eaux selon les indicateurs réglementaires (DCE, OSPAR), et expertiser ces évaluations selon les connaissances actuelles du milieu ; et (3) d’améliorer et publier les connaissances via des projets de recherche, et permettre la validation des modèles. Ce rapport réalise la synthèse des résultats obtenus en 2014, douzième année depuis le début du suivi en Normandie. Le climat de l’année 2014 a été globalement une année chaude, avec un record de la moyenne... |
| Tipo: Text |
Palavras-chave: Abondance; Baie de Seine; Biomasse chlorophyllienne; Bloom; DCE; Écosystème côtier; Éléments de qualité; Eutrophisation; Grille d’évaluation de l’eutrophisation; Hydrologie; Limitation potentielle; Normandie; Nutriments; Phytoplancton; Production primaire; Réseau hydrologique; RHLN; Stocks hivernaux. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00403/51493/52092.pdf |
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| Morelle, Jerome; Schapira, Mathilde; Orvain, Francis; Riou, Philippe; Lopez, Pascal Jean; Pierre-duplessix, Olivier; Rabiller, Emilie; Maheux, Frank; Simon, Benjamin; Claquin, Pascal. |
| Phytoplankton primary production varies considerably with environmental parameters especially in dynamic ecosystems like estuaries. The aim of this study was to investigate short-term primary production along the salinity gradient of a temperate estuary over the course of 1 year. The combination of carbon incorporation and fluorescence methods enabled primary production estimation at short spatial and temporal scales. The electron requirement for carbon fixation was investigated in relation with physical-chemical parameters to accurately estimate primary production at high frequency. These results combined with the variability of the photic layer allowed the annual estimation of primary production along the estuary. Phytoplankton dynamics was closely... |
| Tipo: Text |
Palavras-chave: High frequency; Electron requirement for carbon fixation; Electron transport rate (ETR); Seine estuary. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00429/54020/55470.pdf |
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| Garnier, Josette; Le Gendre, Romain; Passy, Paul; Paris, Francois; Billen, Gilles; Callens, Julie; Cugier, Philippe; Tronquart, Olivier; Romero, Estela; Riou, Philippe. |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00092/20336/17982.pdf |
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| Nedelec, Florence; Dagneaux, Daphney; Lejolivet, Aurore; Fiant, Liliane; Etourneau, Claude; Riou, Philippe; Fontaine, Bruno; Francoise, Sylvaine; Jacqueline, Franck; Justome, Vincent; Maheux, Frank; Pierre-duplessix, Olivier; Rabiller, Emilie; Lesaulnier, Nadine. |
| Le Réseau Hydrologique Littoral Normand (RHLN) pérenne a été approuvé en 2007 par ses partenaires, avec le triple objectif (1) de maintenir le suivi de la qualité des masses d’eau et évaluer leur niveau d’eutrophisation en réponse aux réglementations (Directive Nitrate, OSPAR, DCE), (2) de poursuivre la réflexion sur la définition des indicateurs DCE, puis (3) de développer les connaissances et de fournir des données à la modélisation. Ce rapport réalise la synthèse des résultats obtenus en 2010, troisième année de la mise en œuvre du RHLN pérenne. L’année 2010 a été marquée climatiquement par des températures en moyenne plus fraîches qu’en 2009 et les dix dernières années qui étaient plus chaudes que la normale, des précipitations de nouveau inférieures à... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00094/20512/18181.pdf |
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| Napoleon, Camille; Fiant, Liliane; Raimbault, Virginie; Riou, Philippe; Claquin, Pascal. |
| The dynamics of the phytoplankton assemblage, the physical, chemical and biological parameters, and primary productivity and production were monitored in the central English Channel along a transect between Ouistreham and Portsmouth from January to December 2010. The spatial patterns of the phytoplankton assemblage were controlled by the hydrological characteristics of the water masses, and the annual structure of the phytoplankton assemblage was characteristic of the central English Channel and was controlled by seasonality. The spring bloom was dominated by a single species, Chaetoceros socialis, and associated with low microphytoplankton evenness and Shannon-Wiener indices, whereas the evenness index was high from late spring to winter and associated... |
| Tipo: Text |
Palavras-chave: Phytoplankton diversity; Primary production; Productivity; English Channel. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00198/30964/29336.pdf |
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| Passy, Paul; Le Gendre, Romain; Garnier, Josette; Cugier, Philippe; Callens, Julie; Paris, Francois; Billen, Gilles; Riou, Philippe; Romero, Estela. |
| Eutrophication of the Seine estuary and the Bay of the Seine is a crucial environmental issue for the management of ecosystems and economic activities related to fisheries and tourism. A large quantity of nutrients, especially nitrogen, is brought to the coastal zone by the Seine River, the main input of that area, but also by smaller rivers along the Normandy coast. This large delivery of nitrogen leads to an imbalance between nitrogen (N), phosphorus (P) and silica (Si), which affects the growth of planktonic organisms and can exacerbate the occurrence of harmful algal blooms (HABs). These events can be damaging for shellfish fisheries, an important economic resource for the region. The study describes a new modelling chain coupling a riverine and a... |
| Tipo: Text |
Palavras-chave: Eutrophication; Harmful algal blooms; Nutrient load; Modelling; Water quality; Seine. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00300/41103/41542.pdf |
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| Le Moine, Olivier; Brizard, Raphael; Jeanneret, Helene; Gonzales, Ramiro; Riou, Philippe. |
| Cette mission a été réalisée sous l'égide de la Mairie de Florianopolis, capitale de l'état de Santa Catarina. Cet état est considéré comme un site pilote au niveau du Brésil pour le développement de l'aquaculture. Cette mission s'inscrit dans une coopération Franco-Brésilienne débutée en 2001 avec la visite de Madame le Maire de Florianopolis à Marennes-Oléron, suivie d'une autre mission Brésilienne et du séjour de 3 ostréiculteurs de Florianopolis. Une mission Française a également eu lieu en octobre 2001 à Florianopolis lors de la fête nationale de l'huître "Fenaostra". Cette manifestation regroupe chaque année des participants de nombreux pays étrangers. En 2002 elle a accueilli 60000 visiteurs en 4 jours, et a donné lieu à une vingtaine... |
| Tipo: Text |
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| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00413/52484/53273.pdf |
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| Charria, Guillaume; Schmitt, François; Artigas, Felipe; Berthebaud, Eric; Bonnat, Armel; Bourrin, François; Bozec, Yann; Cariou, Thierry; Claquin, Pascal; Conan, Pascal; Coppola, Laurent; Delalée, Franck; Facq, Jean-valery; Farcy, Patrick; Ferreira, Sophie; Garcia, Fabrice; Grisoni, Jean-michel; Jacqueline, Franck; Jacquet, Matthias; Lefebvre, Alain; Leredde, Yann; Le Roux, Jean-francois; Mas, Sébastien; Mostajir, Behzad; Mousseau, Laure; Pairaud, Ivane; Petton, Sebastien; Pouvreau, Stephane; Quemener, Loic; Ravel, Christophe; Raimbault, Patrick; Repecaud, Michel; Retho, Michael; Rimmelin-maury, Peggy; Riou, Philippe; Savoye, Nicolas; Souchu, Philippe; Verney, Romaric; Vuillemin, Renaud. |
| COAST-HF (Coastal OceAn observing SysTem – High Frequency) is a French national observation network of the physical and biogeochemical dynamics of the coastal ocean, at high frequency. COAST-HF aims at understanding and analysing changes of contrasted coastal ecosystems at different temporal scales from extreme or intermittent high frequency (hour, day) events to multi-year trends. Since several years (from 2000 for the longest time series in Bay of Brest), the network extends along the English Channel, Atlantic and Mediterranean French coasts through 14 fixed platforms instrumented for the in situ high-frequency (≤ 1h) observations. Several French research institutes (IFREMER, CNRS, Marine Universities) are operating these systems. The organization of... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00635/74723/74708.pdf |
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| Riou, Philippe; Etourneau, Claude; Francoise, Sylvaine; Nedelec, Florence; Lamort, Laure; Mary, Charlotte. |
| Du point de vue météorologique, l’année 2009 a été caractérisée par un cumul annuel des précipitations supérieur aux cumuls annuels moyens enregistrés depuis 1949. On notera un mois de novembre battant le record de précipitation depuis les soixante dernières années. Du point de vue de la qualité bactériologique des zones de production conchylicole suivies dans le cadre du réseau REMI, 2009 a été une année plutôt meilleure qu’en 2008. Au total 22 alertes de « niveau 1 » ont dû être déclenchées (28 en 2008) et il y a eu trois alertes de « niveau 2 » (contre 6 en 2008). Ce nombre d’alertes reste cependant important et s’explique par la pluviométrie qui, immanquablement, génère une augmentation des apports bactériens à la mer, par un lessivage accru des sols,... |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00018/12890/9850.pdf |
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| Riou, Philippe; Le Saux, Jean-claude; Dumas, Franck; Le Guyader, Soizick; Le Goff, R.; Maheux, Frank; Lamort, Laure; Pommepuy, Monique. |
| Climate change contributes to local weather modifications such as storm events and heavy rainfall, and in particular, changes in the frequency and intensity of extreme storm and rainfall events. Observations have indicated that rainfall-runoff processes, like sewage overflow may induce fecal contamination in coastal water. Pathogens present in runoff water could therefore contaminate shellfish and be responsible for food-borne disease outbreaks. Mathematical models for this were used to predict the effect of climate modifications on shellfish quality. Using a hydrodynamic model, simulations of water quality conditions under a variety of storm event scenarios were run and are presented here for a harvesting area in France. Major storm events occurring in... |
| Tipo: Text |
Palavras-chave: Modeling; Seawater fecal contamination; E. coli; Virus; Shellfish; Climate change. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/00066/17739/15261.pdf |
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| Menet-nedelec, Florence; Riou, Philippe; Chiffoleau, Jean-francois; Maheux, Frank; Pierre-duplessix, Olivier; Rabiller, Emilie; Simon, Benjamin. |
| In coastal areas where monitoring data show that fine sediments contain contaminants, remobilization of these materials during aggregate extractions, which create a turbidity plume, might influence water quality. The eastern bay of Seine (France) is under the influence of the Seine plume, one of the most contaminated rivers in Europe. This study aimed at investigating remobilization of metals and organics from sediments in surface water during and after an aggregate dredging, through their behavior between total and dissolved phases. In this study area located 20 kilometers off Le Havre, sediments where sampled to identify potential contaminants. Unfiltered and filtered (< 0,2 µm) surface seawater samples were collected at different stages of the... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00310/42077/41380.pdf |
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| Morin, Jocelyne; Riou, Philippe; Lemoine, Michel; Le Pape, Olivier; Bessineton, Christophe; Vedieu, Christophe; Simon, Serge. |
| The study carried out from 1995 to 1997 within the framework of "Le Havre" harbour extension project, concerned the description of halieutic populations and the characterization of a coastal nursery in the oriental part of the Seine bay and in the Seine estuary. The main objective was to describe the specific and demographic composition of marine populations as well as their spatio-temporal distribution, and then to assess the biologic and halieutic role of this area. The study also included a research about the dietary needs of fish juveniles living in the estuary. Methodology Five series of surveys were carried out in subtidal and intertidal zones. They were realised in autumn and winter, from September 1995 to March 1997, in an area extending from the... |
| Tipo: Text |
Palavras-chave: Marine population; Halieutic; Biology; Estuary; Seine bay; Nursery. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/rapport-1576.pdf |
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| Foucher, Eric; Blanchard, Michel; Cugier, Philippe; Desroy, Nicolas; Dreanno, Catherine; Fauchot, Juliette; Fifas, Spyros; Guyader, Olivier; Jean, Frederic; Le Gallic, Bertrand; Riou, Philippe; Schapira, Mathilde; Thiebaut, Eric. |
| The King scallop Pecten maximus constitutes the first landed species in terms of tonnage and the second or third one in terms of value for the French fisheries. More than 90% of these landings come from the English Channel indicating that its exploitation is essential to local fleets. The COMANCHE project (Ecosystem Interactions and anthropogenic impacts on King scallops populations in the English Channel) proposed to improve the knowledge of the scallop within the Channel, through an ecosystem-based approach for fisheries, appealing to a wide range of scientific disciplines (physics, chemistry, genetics, ecology, geostatistics, modeling, economics ....). Researches on the spatial location of scallop beds, connectivity by larval dispersal between beds,... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00251/36236/34797.pdf |
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| Registros recuperados: 48 | |
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