Evaluation
of trophic state of lake Uluabat,
Turkey
Ayse Elmaci*, Nihan Ozengin, Arzu Teksoy,
Fatma Olcay Topac and Huseyin Savas? Baskaya
Department of Environmental
Engineering, Faculty of Engineering and Architecture, Uludag University,
Gorukle Campus, 16059, Bursa, Turkey
(Received: December 13, 2007; Revised
received: May 15,
2008; Accepted: July 10, 2008)
Abstract: Lake
Uluabat,
which is located in Marmara region, is one of the
most productive lakes in Turkey.
Due to concerns about potential pollution resulting from watershed sources and
adjacent agricultural lands, a study of the trophic
state of lake
Uluabat
was conducted during the period February 2003 to January 2004. Total nitrogen
(TN), total phosphorus (TP), Secchi disc depth (SD)
and chlorophyll a (Chl a) were analyzed monthly in
order to assess the trophic state of the lake.
According to calculated nutrient ratios, phosphorus was found to be the primary
limiting nutrient in lake Uluabat. Carlson?s
trophic state index values, based on TP,
SD and chl a, indicated that lake Uluabat is an
eutrophic system.
Key
words: Chlorophyll-a, Lake Uluabat, Secchi
disc depth, Total phosphorus, Total nitrogen, Trophic state index
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