NUTRIENT CHANGES IN SURFACE WATERS OF THE IZMIT BAY (THE MARMARA SEA) IN 2010-2011


KÜÇÜK A., Ergül H. A.

40th CIESM Congress – Marseille, France, Marsilya, France, 28 October - 01 November 2013, pp.154-156

  • Publication Type: Conference Paper / Full Text
  • City: Marsilya
  • Country: France
  • Page Numbers: pp.154-156

Abstract

In this study, it was aimed to examine the relationship among chl-a, oceanographic parameters such as temperature, salinity (ppt), pH, dissolved oxygen (DO), electrical conductivity (mS/cm) and Total nitrogen (TN), Total Phosporus (TP), Ammonia-nitrogen (NH4 ) and Silicate (SiO2 ) between October 2010 and December 2011 in Izmit Bay. Samples were taken once per a month ( October 2010- December 2011) in the surface waters ( inner and outer bay of the Izmit- Marmara Sea). NO2 , NO3 , NH4 , PO4 and SiO2 concentrations were determined spectrophotometrically. The lowest and highest concentrations TN, PO4 -P, SiO4-Si and chl-a were 0.01-0.79 mg/L, 0.03- 0.21 mg/L and 0.72- 14.82 mg/L, respectively. Mean atomic ratio of N/P was lower than the Redfield ratio of 16 for ocean phytoplankton expect July and August 2011, and N was the limiting nutrient.