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Avaliacao dos componentes do balanco de energia durante o primeiro ano de cultura da banana. Repositório Alice
TEIXEIRA, A. H. de C..
Dados de saldo de radiacao, fluxo de calor no solo, gradientes de temperatura e pressao do vapor, coletados no Campo Experimental da Embrapa Semi-Arido, em Petrolina, PE, foram utilizados na avaliacao dos comportamentos diurno e sazonal dos componentes do , balanco de energia, durante as fases fenologicas da cultura da banana, irrigada por .microaspersao, no primeiro ano de producao. Em media, o saldo de radiacao representou 63% da radiacao solar global. A razao de Bowen foi utilizada na medicao dos fluxos de calor latente e de calor sens¡vel. A maior porcao do saldo de radiacao foi usada como fluxo de calor latente , (87%) seguido pelo fluxo de calor no solo (11 %) e pelo fluxo de calor sensivel (2%). O baixo percentual do saldo de radiacao usado como...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Fluxo; Flux; Balanço de Energia; Banana; Calor; Fenologia; Irrigação; Musa sp; Radiação Solar; Heat; Irrigation; Phenology; Solar radiation.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/134284
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Chamber measurement methods and aeration effect on greenhouse gas fluxes during composting CIGR Journal
Park, Kyu-Hyun; Ngwabie, Ngwa Martin; Wagner-Riddle, Claudia.
Composting has the potential to mitigate methane (CH4) and nitrous oxide (N2O) emissions from manure.  The heterogeneous nature of emitting surfaces makes it difficult to quantify these emissions.  CH4 and N2O fluxes measured using eight small chambers (0.72 m2) and a mega chamber (90 m2) were compared, and the effect of aeration on the fluxes during composting was studied.  Two batches of compost were placed in three channels and 2-3 small flux chambers were deployed on each channel.  The channels were enclosed by a building serving as a mega chamber.  Chamber location significantly affected gas fluxes, pointing to strong spatial heterogeneity.  Mean CH4 fluxes from the small chambers were similar or 1.4 times higher compared to the mega chamber.  Mean...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chamber; Compost; Greenhouse gases; Aeration; Flux.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2467
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Chamber measurement methods and aeration effect on greenhouse gas fluxes during composting CIGR Journal
Kyu-Hyun Park; Ngwa Martin Ngwabie; University of Guelph; Claudia Wagner-Riddle.
Composting has the potential to mitigate methane (CH4) and nitrous oxide (N2O) emissions from manure.  The heterogeneous nature of emitting surfaces makes it difficult to quantify these emissions.  CH4 and N2O fluxes measured using eight small chambers (0.72 m2) and a mega chamber (90 m2) were compared, and the effect of aeration on the fluxes during composting was studied.  Two batches of compost were placed in three channels and 2-3 small flux chambers were deployed on each channel.  The channels were enclosed by a building serving as a mega chamber.  Chamber location significantly affected gas fluxes, pointing to strong spatial heterogeneity.  Mean CH4 fluxes from the small chambers were similar or...
Palavras-chave: Chamber; Compost; Greenhouse gases; Aeration; Flux.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2467
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Comportement du cadmium et du mercure lors de la diagenèse précoce et flux à l'interface eau-sédiments en zone littorale ArchiMer
Gonzalez, Jean-louis.
The early diagenesis of Cd and Hg has been studied in different coastal areas (vasière Ouest-Gironde, Pertuis d'Antioche, baie de Marennes-Oléron). For these two metals, the fluxes at the sediment-water interface have been calculated. Considering only molecular diffusion, the diffusionnal fluxes of Cd and Hg to the colurnn water are negligible with regard to both the particular fluxes to the sediments and the inputs of the "Gironde" and "Charente" ·,estuaries. The take into account of the different processes which affect the ex changes at the interface (erosion, bioturbation) permits more realistic an estimation of the role of sediments in the geochemical cycle of Cd and Hg. The results show that up to 50% of particular Cd and Hg which are integrated into...
Tipo: Text Palavras-chave: Cadmium; Mercure; Eaux intrstitielles; Diagenèse précoce; Flux; Interface eaux-sédiments; Bioturbation; Modélisation; Cadmium; Mercury; Pore waters; Early diagenesis; Fluxes; Sediment-water interface; Bioturbation; Modelling.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00442/55402/56920.pdf
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Comportement géochimique des herbicides et de leurs produits de dégradation en milieu estuarien et marin côtier ArchiMer
Munschy, Catherine.
The presence and geochemical behaviour of herbicides were investigated in estuarine and marine waters of the French coasts (Seine, Charente, Gironde estuaries and Rhône delta). These organic contaminants were quantified by capillary Gas Chromatography (GC) using Nitrogen-Phosphorus Detecter and identified by GCIMS (Mass Spectrometry). A liquid-solid extraction method using XAD-2 resins was developed,  allowing the analysis of both chloro-triazines and their degradation products in the nanogram per litre (ng.l-1) detection range. Different types of chemicals were identified in the estuarine and coastal waters: triazine, amide and acetanilide herbicides. These compounds are mainly present in the water phase, with less than 1% associated with particulate...
Tipo: Text Palavras-chave: Estuaires; Herbicides; Chloro-triazines; Dé-éthylatrazine; Comportement géochimique; Phase dissoute; Conservativité; Flux; Estuaries; Herbicides; Chloro-triazines; De-ethylatrazine; Geochemical behaviour; Conservative mixing; Flux.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00443/55443/56962.pdf
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Contamination des coquillages par les norovirus en rivière d'Auray (Norocoqauray) ArchiMer
Treguier, Cathy; Schaeffer, Julien; Le Saux, Jean-claude; Cochennec-laureau, Nathalie; Le Guyader, Soizick.
Les norovirus (NoV) sont responsables des épidémies hivernales de gastroentérites aiguës dans la population. Ils sont excrétés dans les fèces humains, puis se retrouvent, après épuration insuffisante, dans le milieu marin naturel où ils peuvent contaminer des coquillages, qui à leur tour risquent de déclencher des gastroentérites chez les consommateurs. Cette étude vise à améliorer les connaissances sur la contamination des coquillages en élevage en rivière d’Auray par les NoV, en lien avec les bactéries témoins de contamination fécale Escherichia coli (E. coli). L’objectif est de suivre les flux de NoV et d’E. coli apportés par différents rejets (dont une station d’épuration) impactant la zone conchylicole et leur influence sur la qualité des coquillages...
Tipo: Text Palavras-chave: Norovirus; Coquillages; Contamination; Station d’épuration; Flux; Rivière d’Auray; Escherichia coli..
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00267/37778/35829.pdf
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Estimation et caractérisation de la dynamique des flux dans l'estuaire de la Charente ArchiMer
Le Moine, Olivier; Geairon, Philippe.
Le besoin de connaissance (et de partage) sur la quantification et la dynamique des apports (de matières particulaires ou dissous) des fleuves dans les écosystèmes côtiers a motivé ce travail. L'objectif est de mettre au point des méthodes de traitements spécifiques de données acquises par courantométrie Doppler pour évaluer les apports des fleuves, décrire leur dynamique au cours du cycle de marée, et caractériser l'estuaire. Le traitement du signal acquis, en complément d'autres données de bathymétrie et de la salinité permet l'estimation d'indices caractéristiques de l'estuaire du fleuve Charente. Les résultats montrent par exemple que des volumes atteignant 40 à 50 millions de mètres cubes sont déplacés à chaque marée en pic de coefficient. Des...
Tipo: Text Palavras-chave: Estuaire Charente; Flux; Volume oscillant; Intrusions salines; Temps de résidence.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00120/23096/20943.pdf
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Estuaire Charente: flux à Saint-Savinien et intrusions salines, résultats durant l'étiage 2011 ArchiMer
Le Moine, Olivier; Robert, Serge; Geairon, Philippe; Chabirand, Jean-michel.
En réponse aux interrogations et enjeux soulevés par les gestionnaires de l'estuaire de la Charente (EPTB, CG17, AEAG), un projet scientifique partenarial (Ifremer, ULR) a été élaboré pour tenter d'apporter des éléments de réponse souhaités. Les enjeux sont grossièrement de trois ordres : * de gestion, à court et moyen terme, du barrage de Saint Savinien, du Port de Rochefort, de la qualité de l'eau potable. * de connaissances et outils d'aide à la gestion : conditions favorisant l'envasement, continuité écologique, qualité des eaux côtières... * de connaissances scientifiques : bilans hydriques et sédimentaires, impacts des apports dans les pertuis. Les attendus pour cette première phase du projet en 2011 sont surtout la connaissance ou évaluation...
Tipo: Text Palavras-chave: Estuaire Charente; Flux; MES; Intrusions salines; Saint-Savinien; Département Charente-Maritime.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00142/25312/23387.pdf
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Etude des apports en herbicides et en nutriments par la Charente : Modélisation de la dispersion de l'atrazine dans le bassin de Marennes-Oléron ArchiMer
Munaron, Dominique.
Our study aims at making progress the estimate of herbicide and nutrient inputs to the Marennes-Oleron bay which could influence summer oysters mortalities, and to bring by modeling a better understanding of the dynamics of these compounds in the shellfish-farming area. The development of a strategy adapted to the Charente river and its estuary reveals that agricultural activity on the catchment area is omnipresent, as well on the level of the nitrogen and herbicides contributions. It is thus necessary to specify Charente fluxes, which is the main tributary of the Marennes-Oleron bay, in order to better characterize its impact on shellfishfarming activity. Use of a dispersion model will constitute an invaluable help in the risk assessment with respect to...
Tipo: Text Palavras-chave: Atlantic coast; Marennes Oléron Bay; Modelisation; Estuary; Geochemistry behaviour; Charente River; Flux; Nutrient; Herbicide; Littoral Atlantique; Bassin de Marennes Oléron; Modélisation; Estuaire; Comportement Géochimique; Charente; Flux; Nutriments; Herbicides.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-2266.pdf
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Flux et usages de l'eau de mer dans les marais salés endigués Charentais : Cas du marais salé endigué de l'île de Ré ArchiMer
Paticat, Francois.
The aim of the study is to determine how seawater is used in Ré island marine ponds (Charente-Maritime, France). Thus, we assessed the ecosystem functioning, estimated its historical evolution and determined the most suitable ways to improve current management processes. The knowledge of seawater management is essential to ensure wetland future and meet the numerous interests of wetland stakeholders, especially in term of seawater sharing. Consequently, it is necessary to consider the Ré island marine embanked wetland through its natural as well as human characteristics. Our work followed two research axes. First, a survey and a description of wetland activities were realized through their management types and their water use features, knowing that human...
Tipo: Text Palavras-chave: Ré Island; Activities; Management; Saltwater; Flows; Coastline; Île de Ré; Activités; Gestion; Eau de mer; Flux; Littoral.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/these-4518.pdf
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Fonctionnement écosystémique de la lagune de Biguglia. Partie 2 : Déploiement du modèle écosystémique GAMELag sur la lagune de Biguglia ArchiMer
Pete, Romain; Fiandrino, Annie; Malet, Nathalie.
Afin d’apporter des éléments de réponse quantitatifs à ces questions, un outil numérique GAMELag a été développé en collaboration avec l’UMR ECOSYM en se basant sur l’approche LOICZ. Par suite ce modèle « simple » (modèle en boîtes avec calcul de bilan de matière aux interfaces) a été affiné au cours de phases successives de validation. La présente étude vise à déployer le modèle écosystémique « GAMELag » permettant d’évaluer les flux et stock d’azote et de phosphore dans la lagune de Biguglia. L’objectif est de i) valider le fonctionnement du modèle sur la lagune de Biguglia et ii) de fournir aux gestionnaires des résultats en réponse à différents scenarios hydroclimatiques (année sèche/pluvieuse) ou selon différentes options de gestion, notamment...
Tipo: Text Palavras-chave: Modèle écosystémique; GAMELag; Flux; Stock; Azote; Phosphore; Scenarios écologiques.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00604/71564/70011.pdf
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Fonctionnement écosystémique de la lagune de Biguglia. Partie 3 : Scénarios écologiques ArchiMer
Pete, Romain; Malet, Nathalie.
Afin d’apporter des éléments de réponse quantitatifs à ces questions, un outil numérique GAMELag a été développé en collaboration avec l’UMR ECOSYM en se basant sur l’approche LOICZ. Par suite ce modèle « simple » (modèle en boîtes avec calcul de bilan de matière aux interfaces) a été affiné au cours de phases successives de validation. La présente étude vise à déployer le modèle écosystémique « GAMELag » permettant d’évaluer les flux et stock d’azote et de phosphore dans la lagune de Biguglia. L’objectif est de i) valider le fonctionnement du modèle sur la lagune de Biguglia et ii) de fournir aux gestionnaires des résultats en réponse à différents scenarios hydroclimatiques (année sèche/pluvieuse) ou selon différentes options de gestion, notamment...
Tipo: Text Palavras-chave: Modèle écosystémique; GAMELag; Flux; Stock; Azote; Phosphore; Scenarios écologiques.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00604/71565/70025.pdf
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Impact du sédiment sur les mortalités estivales de naissain d'huîtres creuses Crassostrea gigas en baie de Quiberon ArchiMer
Bedier, Edouard; Knoery, Joel Radford; Fleury, Pierre-gildas; Quiniou, Francoise; Langlade, Aime; Cozic, Amandine; Delesmont, Edith; Delesmont, Régis; Caisey, Xavier; Lecureuil, Laetitia.
The phenomenon of summer mortalities of the Pacific cupped oyster Crassostrea gigas is observed in France since the beginning of the 90's. These mortalities are classically associated to younger stages and summer temperatures and occur during the reproduction period of the animal. The studies undertaken during the project Morest (2001-2005), showed that a number of biological and environmental risks, the interaction of them induces lethal stresses for animals in physiological weakness, exists in summer. Among these risks, that which is withstood by the oysters bred close to the sediment proved to be significant in intertidal areas. In Quiberon bay (southern Brittany, France), the breeding practices of sowing oysters in deep water is thus likely to expose...
Tipo: Text Palavras-chave: Huître; Crassostrea gigas; Mortalité; Sédiment; Composé réduit; Flux; Sulfure; Ammonium; Oyster; Crassostrea gigas; Mortality; Sediment; Reduced compound; Flux; Sulphide; Ammonia.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/00108/21956/19550.pdf
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Influence d'un élevage ostréicole sur les flux de nutriments et d'oxygène dans un écosystème lagunaire ArchiMer
Mazouni, Nabila; Deslous-paoli, Jean-marc; Landrein, Sonia.
The impact of suspended oyster culture (Crassostrea gigas, Thunberg) on oxygen and nutrient fluxes has been studied in situ, in a coastal lagoon (Thau, France), during a seasonal cycle. On the first plan of the multiple factorial correspondences analysis (MCA), seasons were well discriminated. The fluxes were maximum in summer and minimum in winter. However, this seasonal pattern was not only linked to the water temperature, as autumn and spring (similar temperatures of about 12 degrees C) were distinct in the second factorial plan (2.3). Oxygen uptake by the oyster cultures varied between 0 mu mol m(-2) h(-1) (January) and 11 823 +/- 377 mu mol m(-2) h(-1) (July). Ammonia and nitrate-nitrites were released into the water column respectively at a rate of...
Tipo: Text Palavras-chave: Oxygen; Nutrients; Fluxes; Oyster culture; Oxygène; Nutriments; Flux; Elevage ostréicole.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/publication-840.pdf
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Les apports en sels nutritifs dans l'estuaire de la Seine ArchiMer
Guillaud, Jean-francois.
In this report, nutrient concentrations and fluxes are evaluated at the Caudebec station in the Seine estuary; with a mean river flow of 413 m3/s, the values of mean interannual fluxes are 46 300 t per year for silicium, 90 700 t per year for total nitrogen and 11 000 t per year for total phosphorus ; since 1984, there is a decrease of phosphate fluxes (3 % per year) and an increase of total nitrogen fluxes (2 % per year).
Tipo: Text Palavras-chave: Sels nutritifs; Estuaire Seine; Flux; Nutrients; Seine estuary; Fluxes.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/00425/53660/54499.pdf
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Monitoring viral contamination in shellfish growing areas ArchiMer
Le Guyader, Soizick; Pommepuy, Monique; Atmar, Robert.
Human and animal fecal wastes and urine contain a large number of different viruses that can enter the environment through the discharge of waste materials from infected individuals. Despite the high diversity of viruses that are introduced into the environment by human fecal pollution, only a few have been recognized to cause disease in association with consumption of contaminated shellfish. Viruses are present in shellfish in very low numbers. Nevertheless, they are present in sufficient quantities to pose a health risk as presented. This low level of contamination has made it necessary to develop highly sensitive viral extraction methods to ensure virus recovery from shellfish tissues. The most common route for accidental contamination is after heavy...
Tipo: Text Palavras-chave: Human enteric viruses; Shellfish; Sewage; Persistence; Flux.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00015/12606/15279.pdf
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Otolith growth in trout Oncorhynchus mykiss: supply of Ca2+ and Sr2+ to the saccular endolymph ArchiMer
Payan, P; Borelli, G; Priouzeau, F; De Pontual, Helene; Boeuf, G; Mayer Gostan, N.
Kinetic and pharmacological characteristics of Ca2+ fluxes across the saccular epithelium of trout were studied using a perfused isolated inner ear. Ca-45(2+) influx from the Ringer solution to the endolymph was 3-4 nmoles h(-1) mu(-1) endolymph, which corresponds to a global turnover rate of the endolymph calcium of 200% h(-1). Ca2+ entry into the proximal endolymph was faster than into the distal fluid. Net Ca2+ movement across the saccular epithelium depended on the direction and intensity of the chemical gradient of calcium between the Ringer solution and the endolymph. Increasing the calcium concentration in the Ringer solution up to 4.4 mmol l(-1) provoked an accumulation of Ca2+ in both proximal and distal endolymphs, and equilibrium was reached...
Tipo: Text Palavras-chave: Inner ear; Perfusion; Otolith; Endolymph; Flux; Calcium; Oncorhynchus mykiss; Trout.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/publication-416.pdf
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Overview of the Arctic Sea State and Boundary Layer Physics Program ArchiMer
Thomson, Jim; Ackley, Stephen; Girard-ardhuin, Fanny; Ardhuin, Fabrice; Babanin, Alex; Boutin, Guillaume; Brozena, John; Cheng, Sukun; Collins, Clarence; Doble, Martin; Fairall, Chris; Guest, Peter; Gebhardt, Claus; Gemmrich, Johannes; Graber, Hans C.; Holt, Benjamin; Lehner, Susanne; Lund, Bjorn; Meylan, Michael H.; Maksym, Ted; Montiel, Fabien; Perrie, Will; Persson, Ola; Rainville, Luc; Rogers, W. Erick; Shen, Hui; Shen, Hayley; Squire, Vernon; Stammerjohn, Sharon; Stopa, Justin; Smith, Madison M.; Sutherland, Peter; Wadhams, Peter.
A large collaborative program has studied the coupled air‐ice‐ocean‐wave processes occurring in the Arctic during the autumn ice advance. The program included a field campaign in the western Arctic during the autumn of 2015, with in situ data collection and both aerial and satellite remote sensing. Many of the analyses have focused on using and improving forecast models. Summarizing and synthesizing the results from a series of separate papers, the overall view is of an Arctic shifting to a more seasonal system. The dramatic increase in open water extent and duration in the autumn means that large surface waves and significant surface heat fluxes are now common. When refreezing finally does occur, it is a highly variable process in space and time. Wind and...
Tipo: Text Palavras-chave: Arctic; Waves; Autumn; Sea ice; Beaufort; Flux.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00437/54837/56313.pdf
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Particulate matter and organic carbon budgets for the Gulf of Lions (NW Mediterranean) ArchiMer
Durrieu De Madron, X; Abassi, A; Heussner, S; Monaco, A; Aloisi, Jc; Radakovitch, O; Giresse, P; Buscail, R; Kerherve, P.
An analysis of sedimentological, sediment trap and hydrological data was performed to investigate the transport and fate of particulate matter in the Gulf of Lions. The sedimentological properties outline the major sedimentary units of the shelf (Rhone prodelta, mid-shelf mud belt, outer shelf) and slope. The geometry of these sedimentary units and the southwestwards increase of particulate fluxes on the slope highlight the influence of the general cyclonic circulation on the dispersion of land-derived particulate matter. Considering the known input and output terms, budgets of particulate matter and organic carbon in the Gulf of Lions are proposed. Inputs were river supply, atmospheric deposition and primary production; outputs were sediment burial and...
Tipo: Text Palavras-chave: Méditerranée; Golfe du Lion; Sédiment; Flux; Bilans de masse et de carbone organique; Mediterranean Sea; Gulf of Lions; Sediment; Flux; Organic carbon and mass budgets.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00301/41210/40366.pdf
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Recherche de l'origine des sources de contamination microbiologique en rivière de Pénerf. Partie 2, Hiérarchisation des flux et modélisation de la contamination ArchiMer
Treguier, Cathy; Hitier, Benoist.
Dans le cadre de la recherche de l’origine des contaminations en rivière de Penerf, une étude a été menée en partenariat entre l’Ifremer et le SIAGM de juillet 2010 à décembre 2011. Des échantillons d’eau douce aux 8 principaux exutoires, ainsi que des coquillages ont été prélevés à une fréquence bimensuelle afin de dénombrer les indicateurs de contamination fécale Escherichia coli. Le calcul des débits au niveau du bassin versant a permis de reconstituer les flux de bactéries fécales provenant des exutoires étudiés. La contamination des points de prélèvement coquillages situés plus en amont s’avère être supérieure, en moyenne, à la contamination des points REMI situés en aval. Cependant, aucune relation statistique significative n’a pu être mise en...
Tipo: Text Palavras-chave: Contamination fécale; Escherichia coli; Bassin versant; Pénerf; Flux; Qualité des zones de production conchylicoles; Modélisation.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00140/25174/23280.pdf
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