The spatial and seasonal patterns of distribution of cyanobacterial species and their abundance in relation tophysicochemical parameters were studied during April, 2002 to March, 2003 from two stations of Uppanarestuary in the south-east coast of India (Lat. 11°42'N: Long. 79°49'E). Presently 15 species of cyanobacteriawere recorded which belong to different families viz. Chroococcaceae (4), Oscillatoriaceae (7) and Nostocaceae(4). The concentration of nutrients was low during summer season and more number of cyanobacteria wasrecorded in monsoon season.
Physico-chemical, Cyanobacteria, Seasonal distribution, Uppanar estuary