The nutritional needs and ecological niche in food webs make microalgae as unique indicators for providing practical information of ecosystem condition. The present study aims to evaluate microalgae distribution and diversity in relation to physicochemical parameters of Narmada River basin around Chutka, a proposed place for nuclear power plant installation in Madhya Pradesh, India. Microalgae number was highest in pre-monsoon followed by the summer season and reduced in monsoon as well as in winter season. The seasonal alteration in water parameters markedly influenced microalgae abundance and diversity. | Microalgae distribution and diversity in the Narmada river basin around Chutka, Madhya Pradesh, India