The book mainly deals with Phytoplankton and their importance in ecosystem and influence of Physico-chemical parameters on the distribution and diversity of phytoplankton in different lakes of Mysore. Different water quality to be application of different water quality indices and the conservation strategies for the restoration of Lake Ecosystem were dealt in detailed in this book. The information's in the book is useful for researchers, planners, policy makers and local bodies for the conservation of lakes.