Impact of environmental stressors on the phytoplankton communities to assess the River Halda, Bangladesh

Halda is a 98 km-long tidal freshwater river of Bangladesh, which has unique feature since it the only natural breeding ground and sole source fertilized eggs Indian Major Carps globally. The present study firstly summarizes impact environmental stressors to understand phytoplankton abundance, community, their diversity in River, Bangladesh. Environmental data as seasons (Winter, Monsoon), water depths, temperature, pH, Salinity, dissolved oxygen, nutrients were collected analyzed from River January 2019 August, 2020. Thirty-four genera, comprising five classes, identified A two-way ANOVA was performed analyze effect Monsoon Winter on physicochemical biological parameters. It revealed that there statistically significant ((F9, 160)= 34.999, p= 0.0) interaction between observed temperature (F 125.31, Fcrit 4.130, 11.118, 2.322, change concentrations River. As nutrients, depths also significantly 1.790, 1.719, affect communities showing highest lowest cell density surface bottom water, respectively.