The seasonal variation and vertical and horizontal distributions of Ceratium hirundinella (O.F.Müller) Dujardin and occurrence of its cyst form in Erfelek and Dodurga Reservoirs (Sinop, Turkey) were studied between August 2010 and July 2011. Our results showed that cyst form was observed with vegetative cells in phytoplankton. Ceratium hirundinella was recorded in high numbers in autumn/winter periods in these reservoirs. Winter conditions did not affect presence/absence of the species, but influenced the cell densities. Vegetative cells were observed mostly in lacustrine and transition zones, horizontally in two reservoirs and also cyst form was recorded in Erfelek Reservoir but not found in Dodurga Reservoir vertically. Dissolved oxygen had positive correlation with vegetative cells and also pH, conductivity and redox potential were important factors for vegetative cells and cyst occurrence.
Journal Section | Articles |
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Publication Date | March 27, 2017 |
Published in Issue | Year 2017 Volume: 21 Issue: 1 |
e-ISSN :1308-6529
Linking ISSN (ISSN-L): 1300-7688
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