Consulta: creatorFacets:"Le Guyader, Françoise"
Registros recuperados: 3
Data/hora: 14/06/2024 17:46:47

Dragages et environnement marin Etat des connaissances
Provedor de dados: 5
Autores: Alzieu, Claude; Abarnou, Alain; Bassoullet, Philippe; Boutier, Bernard; Chiffoleau, Jean-francois; Crenn, Isabelle; Derrien, Annick; Erard-le Denn, Evelyne; Gourmelon, Michele; Guiliaud, Jean-françois; Silva Jacinto, Ricardo; Le Cann, Pierre; Le Guyader, Françoise; Le Hir, Pierre; L'Yavanc, Jacky; Mauvais, Jean-louis; Menard, Dominique; Michel, Pierre; Monbet, Yves; Pommepuy, Monique; Quiniou, Francoise.
Port activities require continuous or occasional dredging of considerable quantities of sediments : approximately 50 million m3 along the French coastline. A large proportion of the dredgings is authorized for dumping at sea in geographically delimited areas and following an impact evaluation of their potential harmfulness to the marine environment. The environmental risks assessment linked to dredging operations relies on knowledge related to several scientific disciplines contributing to changes in the regulations. This work, intended both for managers and for environmental scientists and engineers, is designed to take stock of the current state-of-the-art in the field of sediment contamination and related ecotoxicological hazards, along with a review of...
Tipo: Text
Palavras-chave: Regulations; Management; Impact; Contaminants; Dredging; Réglementation; Gestion; Impact; Contaminants; Dragages.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-1040.pdf

Devenir des virus entériques en mer et influence des facteurs environnementaux
Provedor de dados: 5
Autores: Gantzer, Christophe; Dubois, Éric; Crance, Jean-marc; Billaudel, Sylviane; Kopecka, Helena; Schwartzbrod, Louis; Pommepuy, Monique; Le Guyader, Françoise.
To improve the knowledge of the survival of enteric viruses in a marine environment, the influence of physico-chemical parameters (temperature, UV, salinity) on the survival of infectious poliovirus 1 and hepatitis A Virus (HAV) in seawater was first studied, the influence of suspended solids (SS) on poliovirus adsorption and survival in seawater was then evaluated and the detection of rotavirus genome in environmental samples (shellfish, river water, treated wastewater) was finally investigated. The results show that temperature has a major impact on virus survival in seawater as the time necessary to inactivate 90 % of the virus (T-90) is 671 days at 4 degrees C and only 25 days at 25 degrees C. Ultraviolet light (42 mW s cm(-2)) rapidly inactivates...
Tipo: Text
Palavras-chave: Environmental factors; Survival; Seawater; Enteric viruses; Facteurs environnementaux; Survie; Eau de mer; Virus entériques.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-846.pdf

Colonisation bactérienne et implantation de E. Coli dans le sédiment d'origine littorale
Provedor de dados: 5
Autores: Le Guyader, Françoise.
Le milieu marin littoral est depuis longtemps soumis à de nombreux rejets. Divers facteurs rendent les 1700km de côtes de la Bretagne particulièrement sensibles à ce problème: - géographiques : la côte bretonne est très découpée et comporte de nombreuses baies, estuaires, abers... qui sont le point de convergence de réseaux hydrologiques importants. - démographiques : la région du littoral abrite une forte densité de population. - économiques : la Bretagne est une région d'élevage ce qui provoque une forte contamination des rivières par les bactéries d'origine animale. Les techniques d'épandage largement utilisées contribuent également à la contamination par les eaux de ruissellement. Mais c'est aussi une région touristique : la fréquentation massive des...
Tipo: Text
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00106/21705/19284.pdf