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| Barranguet, C; Alliot, E; Plantecuny, Mr. |
| Microphytobenthos activity in coastal waters has been studied at two shellfish fanning sites: an oyster farm in Thau lagoon and a mussel farm in Carteau bay (NW Mediterranean coast). In both cases, shellfish are cultivated on ropes hanging from rigid structures (tables) in shallow waters (- 5 m). An ''under table'' station and an ''outside table'' (reference) station were chosen at each site. Oxygen and ammonia fluxes at the water-sediment interface were measured in dark and transparent benthic chambers. Chlorophyll a concentrations were two- to threefold higher in ''under table'' sediments than outside (260 mg Chl a m(-2) under the oyster table, 436 mg Chl a m(-2) under the mussel table in winter). Net oxygen fluxes were negative at all stations, except... |
| Tipo: Text |
Palavras-chave: MICROPHYTOBENTHOS; FLUXES; PRIMARY PRODUCTION; SHELLFISH CULTIVATION. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00098/20884/18498.pdf |
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| Naqvi, Wa. |
| Utilizing all the available data, the distribution of nitrite at the secondary nitrite maximum is studied to delineate the boundaries of the denitrification zone and to understand some of the processes that control the extent of denitrification in the Arabian Sea. Nitrite distribution shows little correspondence with primary productivity, and the three major sites of seasonal upwelling appear to be located outside the zone of intense denitrification. This distinguishes the Arabian Sea from the other two major oceanic denitrification sites, located in the Pacific Ocean. The relationship between nitrite and nitrate deficit suggests that the distribution of the former effectively reflects the extent of denitrification. The locus of the most intense... |
| Tipo: Text |
Palavras-chave: ARABIAN SEA; DENITRIFICATION; PRIMARY PRODUCTION; SURFACE CIRCULATION; WINTER CONVECTION. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00101/21257/18870.pdf |
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