Akademik Veri Yönetim Sistemi
Ekoloji, sa.78, ss.26-33, 2011 (SCI-Expanded)
The aim of this study was to determine high inorganic nitrogen concentration of eutrophic West Pond which supplies water to the Sakaryabasi Fish Culture and Research Station was originated whether from sediment or not. In the West Pond sediment, inorganic nitrogen (ammonium-nitrate) flux was estimated in the months (April, July, October, January) that represent the seasons. Negative ammonium and nitrate flux (retention) values were changed between 809.48 and 2069.52 μg.m-2.day-1, from 2053.77 to 7718.10 μg. m-2.day-1, respectively. The minimum and maximum inorganic nitrogen (ammonium-nitrate) flux values were estimated in July and January, respectively. During the decomposition or decay of macrophytes in autumn-winter period, the overlying water's high ammonium values (3.16 - 5.04 mgL-1) showed that macrophytes play an important role in preventing or suppressing the release of mineralized dissolved nitrogen from sediment to the overlying water. The other possible factors on the continuity of the pond eutrophication and the hindered nitrogen flux were no significant differerence at water temperature (18.53 - 21.28°C), no occurrence of anoxic condition in the pond (dissolved oxygen; 5.85 - 7.28 mgL-1) and not a suitable range of pH (7.09 - 7.62) for the nitrification process.