Study of Algal Flora of the 15th Khordad Dam

Algae have been described as more than 1800 genera and 2100 species which are different in terms of the biology, size, structure, and physiology. In this study, the phytoplankton populations of 15 khordad dam reservoir in Qom Province were determined. Four sampling sites were selected for this study. Sampling was carried out from January 2014 to June 2015 to assess algal flora and frequency of phytoplanktons. The results showed that Phytoplankton assemblage comprised several taxa from Diatomaceae (41.1%), Dinoflagellaceae (32.5%), Chlorophyceae (23.2%) and Cyanophyceae (3.2%). Among identified taxa, Cyclotella from Diatomaceae, Peridinium from Dinoflagellaceae, Chlorella from Chlorophyceae and Oscillatoria from Cyanophyceae being the predominant genera in each phylum. The maximum and minimum frequencies were recorded at one meter depth in west side edge during June and at five meter depth in the east side edge of the reservoire during December, respectively.