GRANGERE, Karine, MENESGUEN, Alain, LEFEBVRE, Sébastien, BACHER, Cedric, POUVREAU, Stephane
It is well known that temporal changes in bivalve body mass are strongly correlated with temporal variations in water temperature and food supply. In order to study the influence of the year-to-year...
GRANGERE, Karine, Lefebvre, Sebastien, MENESGUEN, Alain, Jouenne, Fabien
In many ecosystem models based on empirical formulations, parameters generally are calibrated in order to achieve the best fit between measured and simulated chlorophyll a standing stocks. An...
SAVINA, Marie, MENESGUEN, Alain
This paper describes the development of a modelling framework to study the distribution in the English Channel of a benthic bivalve with planktonic larvae, Paphia rhomboides. Age-structured...
VANHOUTTE BRUNIER, Alice, FERNAND, L, MENESGUEN, Alain, LYONS, S, GOHIN, Francis, CUGIER, Philippe
Observations from space and in situ from the R.V Corystes 8/03 Cruise show that a massive Karenia mikimotoi bloom occured during summer 2003 in the western English Channel. Due to exceptional...
This study commissioned by the Syndicat de l'Elorn et de la Rivière de Daoulas aimed at assessing on a mathemical modelling basis the impact of 3 scenarios of reduction of the loadings of Elorn...
SAVINA, Marie, MENESGUEN, Alain
Paphia rhombofdes is an infaunal filter-feeding bivalve, particularly widespread and abundant in the English Channel. In order to investigate the influence of the growth-related post-settlement...
MENESGUEN, Alain, CUGIER, Philippe, LOYER, Sophie, VANHOUTTE BRUNIER, Alice, HOCH, Thierry, GUILLAUD, Jean-Francois, ...
The general trend in ecosystem modelling is to improve the spatial resolution by shifting from rough box-models to fine 3D models. Despite the continuous speeding-up of computing, 3D models involving...
Observation and modelling of natural retention structures in the English Channel (2006)
MENESGUEN, Alain, GOHIN, Francis
Accumulation of heat, or dissolved substances (nutrients, pollutants, etc.), or fine suspended particles in a water body is a key process in the functioning of aquatic ecosystems and their resistance...
Il s'agit du modèle écologique 3D spécialement bâti en 2001 (Leblond et al., 2001) pour répondre à une demande contractuelle de la CUB concernant l'origine de l'azote alimentant la marée verte...
LOYER, S, LAMPERT, Luis, MENESGUEN, Alain, CANN, Philippe, LABASQUE, T
The French Atlantic shelf is Subjected to strong anthropic influences (urban, industrial and agricultural discharges) of two main rivers (Loire and Gironde). The extension and consequences of these...
MENESGUEN, Alain, LE FOLL, Francois
"Par courrier en date du 22 avril dernier, vous avez sollicité les observations de l'Ifremer sur les zones d'extraction et de stockage de crépidules en Rade de Brest prévues par le programme...
"Green tides" in Brittany (France) :nitrate as the main cause (2003)
Since 25 years, an increasing number of beaches and coves along the Britanny coast are invaded from spring until autumn by proliferating green macroalgae (free ulvae, fixed enteromorphae). This...
PLUS, Martin, CHAPELLE, Annie, MENESGUEN, Alain, DESLOUS-PAOLI, Jean-Marc, AUBY, Isabelle
A numerical deterministic model for a seagrass ecosystem (Zostera noltii meadows) has been developed for the Thau lagoon. It involves both above- and belowground seagrass biomasses, nitrogen quotas...
Coastal eutrophication: A review of the situation along the French coasts (2001)
MENESGUEN, Alain, AMINOT, Alain, BELIN, Catherine, CHAPELLE, Annie, GUILLAUD, Jean-Francois, JOANNY, Michel, ...
In order to be able to count the cases of coastal eutrophication and to propose methods to monitor as well as to reduce these phenomena, first of all it is necessary to precisely define the word...
GUILLAUD, Jean-Francois, ANDRIEUX, Francoise, MENESGUEN, Alain
As part of the French National Programme for Coastal Oceanography, this paper focuses on improvement of biogeochemical modelling in the: Bay of Seine (Eastern Channel), by introducing phosphorus in...
CHAPELLE, Annie, MENESGUEN, Alain, DESLOUS-PAOLI, Jean-Marc, SOUCHU, Philippe, MAZOUNI, Nabila, VAQUER, André, ...
An ecosystem model based on nitrogen cycling and oxygen has been developed for the Thau lagoon. It takes into account the specific features of this Mediterranean lagoon, a semi-confined system with...
Using ecological models for fighting against eutrophication of the french coastal waters (1999)
Increasing anthropogenic nitrogen and phosphorus loadings in some coastal areas have induced during the last twenty years excessive production of algal material, either phytoplanktonic or...
GUILLAUD, Jean-Francois, MENESGUEN, Alain
This paper presents an ecological modelling of the Bay of Seine (Eastern Channel) over the last twenty years, chosen as a typical case of eutrophication in a river plume. In the physical sub-model,...
An ecosystem box model for estimating the carrying capacity of a macrotidal shellfish system (1994)
RAILLARD, Olivier, MENESGUEN, Alain
An ecosystem model is presented for estimating the shellfish carrying capacity of Marennes-Oléron Bay (France). It incorpora tes physical and processes: horizontal transport of suspended matter,...
RAILLARD, Olivier, MENESGUEN, Alain
Oyster production of the Marennes-Oléron Basin is simulated using a model integrating phytoplankton growth, oyster growth and horizontal transport of suspended matter. Firstly the simulations are...
Ecological monitoring. Flamanville site Year 1984 (1986)
GENTIEN, Patrick, QUINTIN, Jean-Yves, DREVES, Luc, GUILLAUMONT, Brigitte, LOARER, Ronan, MENESGUEN, Alain, ...
Le site de Flamanville a fait l'objet de cycles de mesures d'hydrologie et de biologie au cours des années 1976-1978 et 1983-1984. Les premières études de projet ont permis d'établir un bilan...