Simulation presenting the expected (modelled) DO trends in relation to saturating oxygen concentration if only one of the three dominant groups of algae observed in Chilka during the period of study June 18, 2004 to September 22, 2006. Frame (a) presents the situation when only Diatoms were present. Frame (b) presents the situation when only Cyanophyceans were present and the situation when only MPB were present is depicted in Frame (c).