Nutrient dynamics between sediment and overlying water in the inner part of Izmir Bay, Eastern Aegean
Makaleler > Tam Makale · 2007
Yazarlar: EBRU YEŞİM ÖZKAN, Ahmet KOCATAS, Hasan Baha BÜYÜKIŞIK
ENVIRONMENTAL MONITORING AND ASSESSMENT, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2007, cilt 143, ss 313-325
DOI: 10.1007/s10661-007-9984-8
Özet
The nutrient flux experiments for the sediments of Inner Izmir Bay were performed for the first time during January 2004-August 2004. The flux rates ranged between -127.9 and 358.2 mu g atN m(-2) day(-1) for NH(4)(+)supercript stop, -47.88 and 320.9 mu g at N m(-2) day(-1) for NO2-, -62.96 and 121.3 mu g at N m(-2) day(-1) for NO3-, -64.1 and 528 mu g atP m(-2) day(-1) for reactive phosphate (RP) and between -168.44 and 284.19 mu g at Si m(-2) day(-1) for reactive silicate (RSi). Negative values were obtained from core incubations in winter except for nitrite (flux from water to sediment). The positive flux in all the core incubations during spring and summer (except nitrite in August) at least revealed that the sediment might be partially anoxic and/or included H2S. The turnover times obtained from water column nutrient inventory and flux rates indicated that Si and NH4+ possessed a rapid cycle in water column. It was argued that NO3- would be more influenced by the removal processes within the sediment, therefore the water column would provide an additional contribution to the N limitation and the short turnover time of RP could rapidly supply RP to the water column. The continuous increase of pore water nutrient concentrations from January to August does not explain whether this nutrient reserve attains the next year with higher background levels or it is released back to environment at the end of autumn.