Abstract
The nutrient distribution in relation to environmental characteristics of the Saronikos Gulf was studied at two stations for the period 1973–1976. The distribution of measured values and their spatiotemporal variations were compared with previous data for the same area. Winter convection resulted in a very weak gradient of temperature, salinity, oxygen and nutrients. Stratification started to develop in May and persisted. for about six months. Little seasonal variation of nutrients appeared to occur, with higher values generally in winter. It was found that the station in the vicinity of the outfall contained more phosphate and ammonia than the station in the source water. Their levels of nutrients were similar in both years, except in the case of phosphate and nitrite, which were double at the station near the outfall in 1975. Of the nutrients controlling productivity in the photic layer of the examined stations in the Saronikos Gulf, phosphate had a stronger limiting effect on plant growth than inorganic nitrogen.
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