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| Registros recuperados: 70 | |
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| Derolez, Valerie; Bec, Béatrice; Munaron, Dominique; Foucault, Elodie; Fiandrino, Annie; Ouisse, Vincent; Messiaen, Gregory; Hatey, Elise; Connes, Coralie; Soudant, Dominique; Brun, Melanie; Fortune, Martine; Mortreux, Serge; Serais, Ophelie; Crottier, Anais; Malet, Nathalie. |
| Cette étude est réalisée dans le cadre du projet OBSLAG (OBServatoire des LAGunes) et porte sur les 10 masses d’eau lagunaires méditerranéennes situées à l’aval des cours d’eau suivis depuis 2015 par le « réseau flux » de l'Agence de l’Eau Rhône Méditerranée Corse. Le rapport correspond aux actions réalisées en 2018 dans le cadre du volet « eutrophisation » d’OBSLAG, répondant aux objectifs suivants : (1) réaliser un suivi estival en 2018 du phytoplancton et de la physico-chimie de l’eau et évaluer l’état DCE de ces compartiments pour la période 2013-2018 sur les 10 masses d’eau lagunaires du suivi « réseau flux », regroupant 13 lagunes poly-euhalines. Ce suivi permet de renforcer la fréquence des suivis DCE sur la colonne d’eau et le phytoplancton, qui ne... |
| Tipo: Text |
Palavras-chave: Directive Cadre sur l’Eau (DCE); Lagunes; Masses d’eau de transition; Eutrophisation; Phytoplancton; Confiance; Précision; Tendance.. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00507/61862/65959.pdf |
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| Face à l’enjeu eutrophisation, le Réseau de Suivi Lagunaire (RSL) a été créé par la Région Languedoc-Roussillon, l’Agence de l’Eau Rhône-Méditerranée & Corse, l’Ifremer et le Cépralmar. Cet outil de suivi permet de diagnostiquer l’état des lagunes régionales vis-à-vis de l’eutrophisation et ainsi d’initier la mise en place d’actions et de mesures de gestion. Le suivi, commun à l'ensemble des lagunes de la région, permet de comparer annuellement l’état des lagunes. Il comprend : un diagnostic annuel de la colonne d’eau sur les mois d’été ; un diagnostic simplifié des macrophytes à un rythme pluriannuel (tous les 3 ans) ; un diagnostic complet de l’eutrophisation qui suit tous les 6 ans, en plus des deux compartiments précédents, l’état du... |
| Tipo: Text |
Palavras-chave: Réseau de Suivi lagunaire; Lagune; Eutrophisation; Bilan; Résultat; Programme; Suivi; Qualité; Eau. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00319/43007/42523.pdf |
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| Delgado, O; Ruiz, J; Perez, M; Romero, J; Ballesteros, E. |
| The effects of fish farming on a seagrass (Posidonia oceanica) meadow at Fornells Bay, Minorca (Balearic Islands) were studied. Changes in plant and meadow features (e.g. shoot morphology, shoot density, biomass, rhizome growth, nutrient and soluble sugars concentrations...) in three stations along a transect from a disturbed (organic pollution due to fish cultures) to an undisturbed site were assessed. The fish culture had ceased in 1991; however, seagrass decline, already reported in a previous study for the period 1988-1990, was still taking place at the time of sampling (July 1994). Differences between stations were very clear; the station closest to the fish cages showed reduced shoot density, shoot size, underground biomass, sucrose concentration and... |
| Tipo: Text |
Palavras-chave: Aquaculture; Phanérogame marine; Posidonia oceanica; Eutrophisation; Caractéristique du sédiment; Aquaculture; Seagrass; Posidonia oceanica; Eutrophication; Sediment characteristics. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43632/43250.pdf |
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| Cahet, G.; Martin, Y.. |
| An experimental eutrophication carried out with several technics on mediterranean sea water (Embiez) in autumn shows : - significant variations in the electro-chemical composition of phytoplanktonic excretion; complex organic substances are excreted during two different periods, especially after the Skeletonema costatum bloom; - close relations between heterotrophy (l4C glucose test) and excretion of organic matter by photosynthetic organisms, glucids are always predominant; - the original heterotrophy from the 14c pyruvate test; which is obviously more selective than the 14c glucose test; - the existence of different periods of active ultraplankton. |
| Tipo: Text |
Palavras-chave: Eutrophisation; Méditerranée; Embiez; Eutrophication; Mediterranean; Sea; Embiez. |
| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/00305/41670/40879.pdf |
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| Ifremer, Del; Ceva, Pleubian. |
| In 1995, the gulf of Morbihan was not showing on the whole a pronounced level of eutrophication, but has nonetheless three sites of green algae proliferation: the Auray river estuary, the branches of the Vannes and Séné estuary, as well as the outlet of the Noyalo's estuary. Only these last two sectors show algal developments that are "abnormal" and that can be linked to a specific phenomenon of eutrophication (Ulva green tide in the Rosvellec-Séné sector, Monostroma green tide in the Saint Armel-Tascon sector). In the spring of 1995, the observations made on the foreshores of the Gulf of Morbihan, excluding the islands, made it possible to estimate an algal biomass of between 2,000 and 6,000 tons. |
| Tipo: Text |
Palavras-chave: Morbihan gulf; Eutrophication; Green seaweed; Green algae; Eutrophisation; Golfe du Morbihan; Algues vertes. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/1996/rapport-2085.pdf |
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| Menet-nedelec, Florence; Broustal, Floriane; Courtay, Gaelle; Fontaine, Bruno; Francoise, Sylvaine; Hernandez Farinas, Tania; Lamort, Laure; Lesaulnier, Nadine; Louis, Fabienne; Maheux, Frank; Mary, Charlotte; M Zari, Lotfi; Rabiller, Emilie; Simon, Benjamin. |
| Ce rapport fait la synthèse des résultats obtenus pour le réseau RHLN/REPHY en 2017 à partir des 30 points suivis le long du littoral normand. Il inclut un bilan du contexte hydro-climatique de l’année 2017 du bassin Seine-Normandie, et la présentation des résultats du réseau obtenus en relation des données interannuelles. Les résultats présentés concernent les paramètres physico-chimiques (température, salinité, oxygène dissous, turbidité, nutriments), et les paramètres biologiques (chlorophylle-a, abondance et composition du phytoplancton). De plus, ce rapport présente la mise à jour intermédiaire des indicateurs des éléments de qualité « Phytoplancton » et de l’Etat Physico-Chimique pour la période 2012-2017, mais qui ne se substitue pas à l’Etat des... |
| Tipo: Text |
Palavras-chave: Normandie; Baie de Seine; Écosystème côtier; RHLN; Réseau; Nutriments; Chlorophylle-a; Phytoplancton; Physico-chimie; Directive Cadre sur l’Eau; Eutrophisation; Évaluation DCE.. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00686/79811/82608.pdf |
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| Lemoine, Gérard. |
| Within the national molluscan monitoring network, a sedimentary study was carried out on five experimental sites located in southern Brittany (i.e., from Etel to Pen-Bé rivers). The study aimed to specify sediment integrating characteristics with regards to hydrobiological variables. Moreover, interactions between sediment and water column characteristics were specified. It appears that this approach is likely unappropriate to characterize interdical rearing area productivity. However, this approach can support the site evaluation on a long term basis to sustain shellfish culture management. This would require additional study to assess sediment reactivity to abnormal events like drastic salinity decrease. |
| Tipo: Text |
Palavras-chave: Sédiment; Ostréiculture; Estran; Phosphore; Eutrophisation; Sediment; Oyster culture; Intertidal area; Phosphorus; Eutrophication. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00102/21344/18967.pdf |
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| Merceron, Michel. |
| On tens of sandy beaches of Brittany, a green seaweed (Ulva) blooms during spring and summer. In the sites where the proliferation is the most important, the total biomass amounted to 20 000 t of wet weight in 1997, at the time of maximum. These "green tides" occur every year in nearly the same locations. They have a very harmful impact on local tourism. In many communes, beached and rotting algae are collected and dumped (43 000 m 3 as a whole in 1997). The main development of biomass takes place between the surf zone and the bare sand.The outbreak requires three coexisting conditions : 1) a sandy beach gently sloping, 2) a weak residual current (i.e. once the tidal back and forth movement has been filtered), 3) a nitrogen loading, even moderate (ammonium... |
| Tipo: Text |
Palavras-chave: Brittany; Eutrophication; Proliferation; Ulva; Marine algae; Bretagne; Eutrophisation; Prolifération; Ulves; Algues marines. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/acte-46.pdf |
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| Piriou, Jean-yves; Chapron, Victorien; Annezo, Jean-pierre. |
| The gulf of Morbihan, without manifesting any pronounced signs of eutrophication, has, in 1995, three sites of green algae proliferation: the Auray river estuary, the branches of the Vannes and Séné estuary, as well as the outlet of the Noyalo's estuary. They are also the three sectors of the gulf that receive the most nutrient salts, in particular, nitrogen, which is a determining factor in the development of nitrophilic green algae (Ménesguen and Piriou 1995). During spring the nitrogen seems to come as much from urban sources (Vannes, Auray) as from agricultural sources coming from the northern catchment areas of the gulf. |
| Tipo: Text |
Palavras-chave: Morbihan gulf; Eutrophication; Nitrogen; Green seaweed; Green algae; Eutrophisation; Golfe du Morbihan; Azote; Algues vertes. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/1995/rapport-2084.pdf |
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| Derolez, Valerie. |
| The Thau lagoon is one of the largest Mediterranean coastal lagoons and it supports many uses such as shellfish farming and fishing, priority activities of the territory, and more recently recreational activities. Since the 1960s, the increase in anthropogenic inputs, linked to the sudden growth of the population, led to microbiological contaminations of shellfish and degraded status of the lagoon, with negative impacts at sanitary, ecological and socio‐economic levels. Since the 1970s, the considerable work carried out on the waste water system on the watershed has made it possible to restore the lagoon, which then began an oligotrophication trajectory, a process that has still few been studied in coastal environments. Subject to a variety of pressures... |
| Tipo: Text |
Palavras-chave: Lagoon; Eutrophication; Oligotrophication; Ecological status; Ecosystem services; Socio‐ecosystem; Thau.; Lagune; Eutrophisation; Oligotrophisation; État écologique; Services écosystémiques; Socio‐écosystème; Thau.. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00662/77364/78938.pdf |
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| Registros recuperados: 70 | |
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