Abstract
This study aimed to determine the species composition of two algal associations in Karakaya Dam Lake. For this purpose, monthly variations in species composition of phytoplankton and seasonally variations in epipelic algae occurring in the dam lake were studied between June 2010 and May 2011. Five stations were selected in Karakaya Dam Lake. A total of 38 algal taxa belonging to Bacillariophyta (27 taxa), Charophyta (2 taxa), Chlorophyta (3 taxa), Cyanobacteria (3 taxa), Miozoa (2 taxa) and Ochrophyta (1 taxon) were identified in the phytoplankton. The diatom genera Cocconeis, Cymbella, Fragilaria, Nitzschia, Stauroneis and Surirella were represented with two taxa in the phytoplankton. Ceratium hirundinella was noticed with its continuous occurrence in the phytoplankton throughout the year. A total of 25 algal taxa belonging to Bacillariophyta (21 taxa), Charophyta (1 taxon), Chlorophyta (2 taxa) and Cyanobacteria (1 taxon) were identified in the epipelon. Seasonal variations of algal species with respect to occurrence frequency and abundance were compared and discussed in relation to physical and chemical properties of the dam lake.
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