Figure 3: Pearson correlation between phytoplankton biomass and different water quality parameters in (a) Rupsha-Pashur, (b) Khalpatua-Arpangachia, and (c) Bhola-Baleswar river systems (* indicate significant correlation at 0.05 level (2 tailed) & ** indicate significant correlation (2 tailed) at the 0.01 level).