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Nitrogenous nutrient transfers in oyster ponds role of sediment in deferred primary production ArchiMer
Sornin, Jean-marc; Collos, Yves; Delmas, Daniel; Feuillet-girard, Michèle; Gouleau, Daniel.
The oyster pond under study has a natural sediment bottom and water is changed only once or twice every month depending on tidal height. Between successive water renewals, the pond is a closed system, equivalent to a batch culture in which sinking and biodeposition of particulate matter are the only sources of organic matter to the bottom. Particulate organic matter enrichment of the sediment in winter is followed by intensive ammonification in summer with very limited nitrification. Seasonal nitrogen budgets involving particulate and dissolved phases show that in summer during batch mode period, ammonium enrichment from the sediment to the overlying water is an order of magnitude higher than the initial nutrient supply in the feed water. This allows a...
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Ano: 1990 URL: http://archimer.ifremer.fr/doc/00178/28892/27749.pdf
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Stimulation de la productivité naturelle par enrichissements minéraux et organiques : étude en mésocosmes naturels ArchiMer
Hussenot, Jerome; Castel, J; Fardeau, Jean-claude; Feuillet-girard, Michèle; Gautier, Dominique; Gouleau, Dominique; Legrand, C; Martin, Jean-louis; Pirastru, L; Ravail, Brigitte; Rince, Y; Sautour, Benoit.
Il a été étudié sur 9 bassins de terre expérimentaux de 200 m3, à l'état initial identique, l'influence de 2 types de stimulation sur les populations naturelles planctoniques et benthiques et sur la qualité physico-chimique de I'eau et du sédiment en comparaison avec des bassins de référence non stimulés.
Tipo: Text Palavras-chave: Marais aquacoles; Productivité naturelle; Fertilisants.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00020/13115/10124.pdf
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