| Abstrakt: |
This study was carried out in the coastal area of the Bosphorus. Sea water samples were collected at 1 m above bottom, once a week, from November 2003 to May 2004. Primary hydrographic conditions, such as salinity (16.11- 23.55 psu), temperature (5.5-14 °C) and dissolved oxygen (6.56-10.58 mg/L) were recorded on sampling stations. The lowest and highest concentrations of NO3+NO2-N, PO4-P, SiO4-Si and chlorophyll-α were 1.03-13.70 μM, 0.28- 1.36 μM, 3.94-11.70 μM and 0.44-3.94 μg/L, respectively. The mean atomic ratio of N/P was lower than the Redfield ratio of 16 for ocean phytoplankton, and N was the limiting nutrient. The ratio of nitrogen to phosphorus varied from 3.6 to 12.5. Si/P ratios were low, except in May. Silicate was likely the limiting factor for the growth of especially diatoms, and the region examined is oligotrophic in nature. [ABSTRACT FROM AUTHOR] |
