• SYNUDEEN SAHIB.S

The Ottakkal reservoir is located between latitude 80 49’ and longitude 77016’ and 76024’ E . The physico-chemical parameters showed only slight variations. Out of 35 species of phytoplankton recorded , 10 belonged to Bacillariophyceae, 15 Chlorophyceae, 9 Cyanophyceae and 1 Desmidaceae. The Chlorophyceae represented the maximum density throughout the period of the study. It was maximum during November to April and minimum during June to September. The Cyanophyceae was noticed only during March and April. The observations showed the maximum density of phytoplankton in winter and the minimum density during rainy periods . The low temperature and velocity coupled with good transparency of water may be considered as the factors that favoured optimum growth of the phytoplankton of the Ottakkal reservoir during winter.

Ottakkal reservoir, Phytoplankton, Organic matter, Physico-chemical parameters

"Phytoplankton biodiversity of Ottakkal reservoir, Kerala.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.1041-1044, July-2018, Available :http://www.jetir.org/papers/JETIR180Z039.pdf

"Phytoplankton biodiversity of Ottakkal reservoir, Kerala.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp1041-1044, July-2018, Available at : http://www.jetir.org/papers/JETIR180Z039.pdf