Seasonal Variations of Phytoplankton Blooms in Suat Ugurlu (Samsun - Turkey)

Authors : Arif GÖNÜLOL

Pages : 93-98

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The seasonal variations in phytoplankton blooms in Suat Uğurlu Reservoir were studied between July 1992 and De-cember 1993. In certain months, the species Asterionella formosa Hassal, Cyclotella planctonica Brunthaler, Melosira granulata insert ignore into journalissuearticles values(Ehr.); Ralfs insert ignore into journalissuearticles values(Bacillariophyta);; Pediastrum simplex Meyen, Pandorina morum Borry insert ignore into journalissuearticles values(Chlorophyta); and Ceratium hirundinella insert ignore into journalissuearticles values(O F. Müller); Schrank insert ignore into journalissuearticles values(Dinophyta); produced blooms in the lake. During the study period, the measured N/P ratio in the water varied from 10.3 mg/lt to 62.5. In accordance with these variations, P. simplex, P. morum and C. hirundinella, which consume high levels of phosphate, produced blooms in summer, whereas the blooms in winter were produced by A. formosa, C. planctonica and M. granulata, which consume more nitrate than phosphate.
Keywords : Phytoplankton, Seasonal Variation, Bloom, Dam Lake