Data/hora: 10/06/2024 11:59:54

Provedor de dados: | 5
País: | France
Título: | Influence of oyster farming Crassostrea gigas on the phosphate cycle in an intertidal zone : the role of biodeposition
Autores: | Sornin, Jean-marc; Feuillet, Michelle; Heral, Maurice; Fardeau, Jean-claude.
Data: | 1986-07
Ano: | 1986
Palavras-chave: | Phosphore; Crassoslrea gigas; Biodéposition; Dilution isotopique; Marennes-Oléron; Phosphorus; Crassostrea gigas; Biodeposition Isotopic; Dilution; Marennes-Oléron.
Resumo: | Some aspects of the phosphorus cycle were studied in the estuarine bay of Marennes, Oléron, an area of intensive cultivation of Crassostrea gigas on the west coast of France. The annual cycle of dissolved phosphorus (mineral and organic) in the water column, interstitial water and at the sediment-water interface was followed, as well as the particulate phosphorus (total and assimilable) in sediments and in suspension. A comparison of the seasonal variations in these different forms of phosphorus in the suspended matters shows a deficit in "biodeposits" (sedimented faeces and pseudofaeces from Crassostrea gigas) equivalent to 20 mg.m -2.d -1 for assimilable phosphorus in July and September-October. This may be the result of consumption by the oysters, since the same biomass (200 oysters.m-2) can yield up to 3500 mg.m-2.d-1 total phosphorus in February-March and September-October; and 80 mg.m-2.d-1 assimilable phosphorus in winter. These estimates are finally used to calculate fluxes between suspended, consumed and deposited forms of phosphorus, and demonstrate a net flux of total phosphorus from the water column to sediments amounting to 808 g.m-2.y-l and to 25 g.m-2.y-l of assimilable phosphorus.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/1986/publication-2973.pdf
Editor: | Gauthier-villars/editions Elsevier
Relação: | http://archimer.ifremer.fr/doc/00000/2973/
Formato: | application/pdf
Fonte: | Oceanologica Acta (0399-1784) (Gauthier-villars/editions Elsevier), 1986-07 , Vol. 9 , N. 3 , P. 313-322
Fonte: | Gaulhier-Villars