Eutrophication of Nile water and seasonal periodicity of phytoplankton communities as influenced by cement industrial wastes at Helwan region

ABSTRACT

The changes in phytoplankton size and species composition in the Nile water facing to Portland Cement Factory [Helwan] were studied during the period October 1987 - September 1988. The standing crop showed distinct seasonal variations. Spring harbored the highest yield, whereas winter and autumn represented the poorest seasons. The dominance of algal groups was arranged as Bacillariophyta > Cyanophyta > Chlorophyta > Euglenophyta. The physicochemical characteristics of water also analyzed during this period