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Pak J. Bot., 5(1): 11-18, 1973.

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SEASONAL SUCCESSION OF CERTAIN SPECIES OF PHYTOPLANKTON FROM ST. MARGARET’S BAY, N.S.

S.M. Saifullah[1] and D M. Steven

Abstract: Seasonal succession of 18 species of phytoplankton from St. Margaret’s Bay is described. Species of Chactoceros and Thalassiosira occurred abundantly at times when nutrient values were high and temperatures were low, whereas Ceratium spp. preferred nutrient poor warm waters. Seasonal associations of species of phytoplankton which characterized one or more than one seasons were noted.

Marine Sciences Centre, McGill University, Montreal, Canada.

Institute of Marine Biology, University of Karachi