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- W1601743878 abstract "Abstract Hydrobiological conditions (light penetration, temperature, salinity, chlorophyll biomass at six depths and bacterioplankton abundance at the surface) were measured weekly for six years (1992–1997) at a station located in a coastal area of the Gulf of Guinea (Abidjan, Cote d'Ivoire). Nutrient concentrations completed the data set from December 1994. This coastal area is strongly influenced by a major upwelling (July–September) and by a minor upwelling (short cold events during January–February). Continental inputs induced by local rainfalls (May–June and October) and river floods (September–November) have also pronounced hydrological effects. SST varied from 20.6°C (August) to 30.7°C (May), while surface salinity showed an obvious annual cycle with a minimum of 30.12 psu in June and a maximum of 35.87 psu in September. Bacterial abundance and phytoplankton biomass show seasonal cycles, with simultaneous peaks noted during the main upwelling (maximum: 1.9 10 6 cell ml −1 and 5.6 μ g l −1 respectively). Interannual fluctuations of upwelling intensity and of continental inputs explain the hydrological variability. Freshwater inputs are associated with oligotrophy, while upwellings contribute to the enrichment of the euphotic layer. As a consequence of the drought in the Sahel and of the decreasing rainfall on the coastal area, freshwater inputs are now considerably reduced, and the related impoverishment is less pronounced. At the opposite, the increasing duration of upwellings (and the importance of the short cold events) allows a higher primary productivity (and therefore a more active bacterial compartment). Combined, these two factors would explain the marked outburst of small pelagic fishes in this part of the Gulf of Guinea." @default.
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- W1601743878 date "2002-01-01" @default.
- W1601743878 modified "2023-10-17" @default.
- W1601743878 title "9 Environmental variability at a coastal station near abidjan: Oceanic and continental influences" @default.
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- W1601743878 doi "https://doi.org/10.1016/s1570-0461(02)80031-3" @default.
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