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Échanges à l'interface eau-sédiment dans un secteru côtier à forte biodéposition (parc ostréicole), cas de l'ammonium et des nitrates = Exchanges of ammonium and nitrates across the sediment-water interface in an oyster bed of a coastal area
Lerat, Y.; Boucher, G.; Le Corre, P. (1985). Échanges à l'interface eau-sédiment dans un secteru côtier à forte biodéposition (parc ostréicole), cas de l'ammonium et des nitrates = Exchanges of ammonium and nitrates across the sediment-water interface in an oyster bed of a coastal area. Cah. Biol. Mar. 26(4): 393-408
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094, meer
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| Auteurs | | Top |
- Lerat, Y.
- Boucher, G., meer
- Le Corre, P.
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| Abstract |
The exchanges of ammonium and nitrates across the sediment-water interface and their interstitial water concentrations were measured in an oyster bed of the Penze River (North Britanny, France) from August 1983 to March 1984. At the end of the summer, the accumulation of ammonium and nitrates is related with an input of organic matter resulting from oyster's biodeposition. Ammonium is mainly released into the water column. During autumn, the accumulation and the fluxes of ammonium decrease; nitrates are taken up by the sediment. In winter, both nitrates and ammonium are absorbed, but only ammonium is regenerated in the sediment. The exchanges across the sediment-water interface do not always follow the molecular gradient, as some uptake and transformation mechanisms can modify the direction and the intensity of the exchanges. |
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