Archives

A comparative account of the diversity of freshwater phytoplankton from two districts of Karnataka
(Mysuru-T. Narasipura; and Mandya-Srirangapatna Talukas) was carried out. Twenty one species
appeared in T. Narasipura taluka and 15 species appeared in Srirangapatna Taluka. Anabaena
macrospora and Chroococcus turgidus were abundant while Stauroneis phoenicenteron and
Merismopedia tenuissima appeared at all sites of collections Shannon index showed variation to a
certain extent while the other indices were not well marked. Blue green algae dominated in all the
study sites. According to most limnologists species poor communities indicate adverse effects of
pollution which in turn reduce the diversity of the habitat.
Key words: Plankton, Diversity, Shannaon, Simpson, Dominance, Evenness