tailieunhanh - A study on the phytoplankton of Hasan Uğurlu Dam lake (Samsun Turkey)

The composition and seasonal variations of phytoplankton of Hasan UĞURLU Dam Lake were studied using samples collected from two stations between July 1992 to December 1993. 57 taxa were identified belonging to the Bacillariophyta, Chlorophyta, Cyanophyta, Dinophyta and Euglenophyta divisions of phytoplankton. | Tr. J. of Biology 22 (1998) 447-461 © TÜBİTAK A Study on the Phytoplankton of Hasan UĞURLU Dam Lake (Samsun-Turkey) Arif GÖNÜLOL Ondokuz Mayıs University, Science and Arts Faculty, Department Biology Kurupelit, Samsun-TURKEY Olcay OBALI Ankara University, Faculty of Science, Department Biology Beşevler, Ankara-TURKEY Received: Abstract: The composition and seasonal variations of phytoplankton of Hasan UĞURLU Dam Lake were studied using samples collected from two stations between July 1992 to December 1993. 57 taxa were identified belonging to the Bacillariophyta, Chlorophyta, Cyanophyta, Dinophyta and Euglenophyta divisions of phytoplankton. In the phytoplankton, Asterionella formosa, Cyclotella planctonica, Pediastrum simplex and Ceratium hirundinella caused water blooms in certain months. The light density and temperature affected the composition and seasonal variations in phytoplankton considerably. Nutrient levels in the lake did not limit the seasonal variations in phytoplankton. It was determined that Lake Hasan Uğurlu had mesotrophic characteristics because of the morphometric structure, physical and chemical properties of the water and a phytoplankton type which caused water blooming by various taxa during certain months Key Words: Phytoplankton Hasan Uğurlu Baraj Gölü (Samsun-Türkiye) Fitoplanktonu Üzerinde Bir Araştırma Özet: Hasan Uğurlu Baraj Gölü fitoplankton topluluğu ve mevsimsel değişimi iki istasyondan alınan örneklerde, Temmuz 1992 - Aralık 1993 tarihleri arasında araştırılmıştır. Fitoplanktonda Bacillariophyta, Chlorophyta, Cyanophyta, Dinophyta ve Euglenophyta’ya ait 57 takson tesbit edilmiştir. Fitoplanktonda Asterionella formosa, Cyclotella planctonica, Pediastrum simplex ve Ceratium hirundinella belirli aylarda aşırı çoğalmalar yapmıştır. Fitoplankton topluluğunda ve mevsimsel değişiminde ışık ve sıcaklık etkili olmuş, göldeki besin tuzları miktarı ise sınırlayıcı olmamıştır. Hasan Uğurlu Baraj Gölü; morfometrik yapısı, suyun