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Seasonal cycling of phosphorus in the Southern Bight of the North Sea
Van der Zee, C.; Chou, L. (2005). Seasonal cycling of phosphorus in the Southern Bight of the North Sea. Biogeosciences 2(1): 27-47
In: Gattuso, J.P.; Kesselmeier, J. (Ed.) Biogeosciences. Copernicus Publications: Göttingen. ISSN 1726-4170; e-ISSN 1726-4189, more
Peer reviewed article  

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    Chemical elements > Nonmetals > Phosphorus
    Cycles > Chemical cycles > Geochemical cycle > Biogeochemical cycle > Nutrient cycles
    Nutrients (mineral)
    Temporal variations > Periodic variations > Seasonal variations
    ANE, North Sea, Southern Bight [Marine Regions]

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    We have investigated the seasonal cycle of nutrients, chlorophyll a, dissolved organic nitrogen (DON), and dissolved and particulate organic carbon (DOC and POC) for 10 stations in the Belgian coastal zone. Special attention was given to phosphorus speciation, i.e. dissolved inorganic and organic phosphorus (DIP and DOP) and particulate inorganic and organic phosphorus (PIP and POP). Spatial and temporal trends of the inorganic nutrients and the organic species are discussed. The Belgian part of the southern North Sea is strongly influenced by the river plumes of the Rhine, Meuse and Scheldt resulting in northeast-southwest salinity gradient. Extrapolation of winter nutrient and DOC concentrations versus salinity plots yielded zero-salinity values typical of the river Scheldt. The polyphosphate concentration did not show any temporal trend, whereas both the phosphate and the DOP concentrations exhibited distinct seasonal variations. Silica or phosphorus was the potential limiting nutrient for phytoplankton growth based on elemental ratios.

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