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| Registros recuperados: 17 | |
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| Heral, Maurice; Robert, Jean-michel; Truquet, Isabelle; Barbaroux, Olivier; Garnier, Jacqueline; Razet, Daniel. |
| Values of nitrogen nutrients (ammonia, nitrite and nitrate) are compared with values of total organic nitrogen and urea. In summer, the consumation by micro and macrophytes is added to less important telluric input of nineral nitroge. However, an important provision of organic nitrogen remains. On the contrary, in winter, organic nitrogen does not represent more than 10% of total nitrogen. The autors postulate that populations of oysters are at the starting point of the organic nitrogen production cycle. |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Biochimical composition; Oysters; Crassostrea gigas; Composition biochimique; Huîtres. |
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/1981/acte-2940.pdf |
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| Tronczynski, Jacek; Munschy, Catherine; Moisan, Karine; Guiot, Nadege; Truquet, Isabelle; Olivier, Nathalie; Men, Sophie; Furaut, Audrey. |
| An investigation was carried out into the PAH chemical contamination resulting from the "Erika" tanker fuel spillage of December 1999 along the French coast of the Bay of Biscay. A qualitative and quantitative assessment was conducted of this contamination in water, suspended particulate matter, sediments, and in intertidal molluscs. The chemical composition of PAHs in pre-spill and post-spill samples was determined and used to distinguish the "Erika's" fuel as the source of PAHs in the coastal environment of the Bay of Biscay. Changes in concentrations of PAHs were also assessed. The GC-MS analysis made it possible to identify and quantify parent unsubstituted PAHs, alkyl-substituted PAHs (C-PAH) and sulfur heterocycle unsubstituted and alkyl substituted... |
| Tipo: Text |
Palavras-chave: The "Erika" oil spill; North East Atlantic; Marine molluscs; Sediments; Suspended particulate matter; Water; Chemical contamination. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-401.pdf |
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| Grouhel-pellouin, Anne; Dupraz, Valentin; Allenou, Jean-pierre; Chauvin, Jacky; Cheve, Julien; Collin, Karine; Dagault, Francoise; Derrien, Annick; Doner, Anne; Duval, Audrey; Faure, Sandra; Fortune, Mireille; Gabellec, Raoul; Legendre, Aurelie; Lejolivet, Aurore; Le Merrer, Yoann; Retho, Michael; Robert, Serge; Truquet, Isabelle. |
| Le contrôle de surveillance 2013 pour la DCE appliquée dans les eaux littorales de Loire Bretagne a porté sur les 25 masses d’eau côtières (sur 39 au total) et les 16 masses d’eau de transition (sur 30 au total) retenues au titre du contrôle de surveillance. L’ensemble des résultats acquis, aussi bien sur les paramètres biologiques que chimiques, a permis de mettre à jour l’évaluation de l’état des masses d’eau affiché sur l’atlas DCE accessible sur la page web d’Envlit correspondante. |
| Tipo: Text |
Palavras-chave: DCE; Bassin Loire-Bretagne; Contrôle de surveillance; Eaux côtières et eaux de transition; WFD; Loire Bretagne district; Monitoring; Coastal waters and transitional waters. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00254/36502/35049.pdf |
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| Oger-jeanneret, Helene; Allenou, Jean-pierre; Cheve, Julien; Collin, Karine; Dagault, Francoise; Doner, Anne; Duval, Audrey; Faure, Sandra; Fortune, Mireille; Gabellec, Raoul; Legendre, Aurelie; Le Merrer, Yoann; Piriou, Jean-yves; Retho, Michael; Ryckaert, Mireille; Thomas, Gerard; Truquet, Isabelle. |
| Dans les 25 masses d’eau côtières retenues au titre du contrôle de surveillance (sur 39 au total), la surveillance DCE 2010 a porté sur les paramètres suivants : -température, salinité, turbidité, oxygène dissous, nutriments (nitrate, nitrite, phosphate, ammonium, silicate); - phytoplancton (qui est suivi aussi dans 5 masses d’eau de transition non turbides) ; - macroalgues benthiques en zones intertidale (façade) et subtidale (Pays de la Loire) ; - blooms de macroalgues ; - herbiers de Zostera marina ; - invertébrés benthiques de substrat meuble en zones intertidale et subtidale. D’autre part, les 41 substances chimiques DCE ont été analysées dans les coquillages pour confirmer, ou non, les dépassements des NQE-eau observés dans certaines masses d’eau en... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00050/16094/13569.pdf |
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| Oger-jeanneret, Helene; Allenou, Jean-pierre; Cheve, Julien; Collin, Karine; Dagault, Francoise; Derrien, Annick; Doner, Anne; Duval, Audrey; Faure, Sandra; Fortune, Mireille; Gabellec, Raoul; Genauzeau, Sylvie; Le Merrer, Yoann; Queau, Julie; Piriou, Jean-yves; Retho, Michael; Schmitt, Anne; Truquet, Isabelle. |
| La Directive Cadre sur l’Eau 2000/60/CE établit un nouveau cadre pour une politique communautaire dans le domaine de l’eau. Elle fixe comme objectif général l’atteinte, à l’horizon 2015, d’un bon état écologique et chimique des masses d’eau souterraines et de surface, ces dernières incluant les eaux côtières et de transition (estuaires en particulier). Les masses d’eau côtières et de transition sont des unités géographiques cohérentes, qui ont été définies sur la base de critères physiques ayant une influence avérée sur la biologie : * critères hydrodynamiques (courant, marnage, stratification, profondeur… ), * critères sédimentologiques (sable, vase, roche… ). Dans le bassin Loire-Bretagne, qui s’étend du Mont Saint-Michel à La Rochelle, le groupe de... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00108/21940/19534.pdf |
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| Gonzalez, Jean-louis; Boutier, Bernard; Chiffoleau, Jean-francois; Auger, Dominique; Noel, Joelle; Truquet, Isabelle. |
| The study of Cd and Hg distribution in the sediments, water and suspended matter of the Bay of Marennes-Oléron provided the opportunity to identify the factors governing the distribution of these two contaminants throughout the bay. On one hand, these elements are associated with the continental inputs from the Charente river which settle on arrivaI at the mouth of the estuary and in the eastern part of the bay. The Cd and Hg present in these deposits are associated with POC, as weIl as with Mn and Fe oxides and hydroxides. On the other hand, a portion of the dissolved inputs is recycled in the bay waters through phytoplankton activity. This mechanism contributes, particularly in the case of Cd, to increased particulate metal fluxes from the water column... |
| Tipo: Text |
Palavras-chave: Baie de Marennes-Oléron; Métaux lourds; Sédiments; MES; Activité phytoplanctonique; BAY OF MARENNES-OLERON; HEAVY METALS; SEDIMENTS; SUSPENDED MATTER; PHYTOPLANKTON ACTIVITY. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00085/19604/17242.pdf |
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| Maggi, Pierre; Soulard, Louis; Truquet, Isabelle; Chauvin, Jacky. |
| Analysis of local hydrological and climatic factors help to determine basic conditions for blooms and red tides in Vilaine Bay during summer 1983. Spring or late summer heavy rainfalls produce nutrients increase and low salinities in coastal surface waters. It causes sharp saline stratification, enhanced or destroyed by winds, according to their direction and intensity. Summer thermal stress associated with low turbulence (no wind, neap tide, quiet waters...) produce strong thermal increase in surface layers. The thermal stratification thus obtained emphasizes saline stratification. When all favourab1e conditions are fulfilled increaeing development of diatoms lead to brown discolored waters. Decrease in diatoms communities occurs as nutrients crop is... |
| Tipo: Text |
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| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/rapport-4576.pdf |
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| Maggi, Pierre; Mastouri, Abderrazak; Truquet, Isabelle; Soulard, Louis; Cadiou, Yvon; Le Paul, Christine; Giboire, Louis. |
| Le, fortes pluies de printemps ont provoqué un enrichissement et une dessalure des eaux superficielles côtières ; à cette stratification haline est venue s'ajouter, dès le début de l'été, une stratification thermique importante. Début avril, les conditions de milieu onc été optimales pour déterminer l'efflorescence printanière à diatomées Skeletonema costatum responsable de la couleur marron prise par l'eau de mer. Cette prolifération brève a rapidement disparu sous l'effet de l'agitation des masses d'eau. Après la pluviosité exceptionnelle du mois de mai, les conditions sont redevenues propices à un développement abondant des petites diatomées (Chaetoceros et Rhizosolenia) , courant juin, alors que la température de l'air atteignait des valeurs élevées en... |
| Tipo: Text |
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| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00119/23010/20841.pdf |
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| Maggi, Pierre; Lassus, Patrick; Truquet, Isabelle; Mastouri, Abderrazak; Soulard, Louis. |
| In 1985 the spring bloom of the diatom Skeletonema costatum did not show a brown discoloration of superficial waters like in 1983 and 1984. Somme factors being unfavorable between mid march and mid april , low sea water temperature, high frequency of moderate and strong winds, rough sea. The summer bloom of Thalassiosira sp. and Rhizosolenia delicatula which appears in may has been enhanced , by the strong rainfails between mid march and mid april, the increase of sea temperature at the end of may and at the beginning of june, the low mixing of sea waters correlated with the predominance of light and moderate winds in may and june, the low salinity and high nutrient load of upper layers. The bloom disappeared at the end of june mainly by the action of the... |
| Tipo: Text |
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| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00119/23015/20845.pdf |
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| Heral, Maurice; Razet, Daniel; Deslous-paoli, Jean-marc; Manaud, Francois; Truquet, Isabelle; Garnier, Jacqueline. |
| After determining the seasonal features of the hydrobiology of the Marennes-Oléron's estuarine complex in 1976 and 1977 (Héral et al, 1983), based on seasonal campaigns conducted in 15 stations sampled in a tide half-cycle, it was proposed to monitor 5 stations spread out over the entire basin (figure 1) as part of the National Observation Network (RNO) with two monthly samples taken, one at neap tide, the other at spring tide. In the same way, station 3, at the centre of the basin, was sampled at tide half-cycle, on the same days but with a special effort to determine the dissolved and particulate organic substances. The goal of this paper is to introduce the results of the RNO's hydrobiological parameters at the stations of the Charente (5) estuary, the... |
| Tipo: Text |
Palavras-chave: Substances organiques particulaires; Substances organiques dissoutes; Marennes Oléron; Hydrobiologie. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/publication-2934.pdf |
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| Lassus, Patrick; Le Dean, Loic; Bocquene, Gilles; Bardouil, Michele; Truquet, Philippe; Truquet, Isabelle; Larrazabal, M.e.. |
| During EIGAS échointegration cruise, hydrological and phytoplanktonic sampling operations have been carried out along off shore and coastal South Brittany area, from June 8 th to 20 - 1986. Dinophysis cells densities have been evaluated at 3 depths and for 32 statlons between Penmarc'h and Belle Ile, and positive correlation with water stability index have been pointed out; high cells densities area have been detected in the South of Loire estuary |
| Tipo: Text |
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| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00119/23000/20830.pdf |
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| Lassus, Patrick; Truquet, Philippe; Le Dean, Loic; Bardouil, Michele; Truquet, Isabelle. |
| As a part of hydrological sampLing operation in South Brittany, 8 transects for 26 sampling stations were made in order to determine horizontal, and vertical distribution of Dinophysis sacculus in the 10 m layer. Un like to 1986, results do not show any correlations between Dinophysis concentrations and stability index. That may, nevertheless, be due to lower cells densities in 1987 when compared to 1986. A thermal, gradient, lower than in 1986, is still observable in the Bouthern of Loire Mouth. And, as a last point, when chlorophyll a concentrations are higher in - 10 m layer than in surface layer (Audierne and Noirmoutier areas), it can be observed hight densities of an other toxie Dinoflagellate : Gyrodinium aureolum . |
| Tipo: Text |
Palavras-chave: Bretagne sud; Hydrologie; D. sacculus; G. aureolum; South Brittany; Hydrology; D. sacculus; G. aureolum. |
| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00138/24921/23015.pdf |
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| Chiffoleau, Jean-francois; Truquet, Isabelle. |
| Des matières solides séchées sont minéralisées en bombe fermée par un mélange d'acide nitrique, d'acide chlorhydrique et d'acide fluorhydrique à environ 120 °C pendant 180 minutes. Cette attaque acide est totale et le minéralisat liquide obtenu est analysé pour sa teneur en métaux par absorption atomique avec ou sans flamme. C'est une méthode très sensible puisqu'elle permet de détecter dans des particules jusqu'à 0,35 % d'Al; 0,15 % de Fe, 0,1 mg/kg de Cd, 2 mg/kg de Co, 0,4 mg/kg de Cr, 2 mg/kg de Cu, 0,4 mg/kg de Mn, 2 mg/kg de Ni, 2 mg/kg de Pb, 0,1 mg/kg de Zn. La précision de cette méthode, sa reproductibilité ( de l'ordre de 7 % ) et sa facilité de mise en oeuvre en font une méthode de choix pour l'étude de faibles de quantité d'échantillons, comme... |
| Tipo: Text |
Palavras-chave: Analyse; Métaux-traces; Sédiments; Matières en suspension; Absorption atomique. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00140/25119/23228.pdf |
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| Registros recuperados: 17 | |
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