"The book is a comprehensive and updated account on algae, invertebrate animal community, bacterioplankton, virioplankton, diversity of phytoplankton, primary productivity of phytoplankton, photosynthetic efficiency in tropical aquatic systems. The characteristics of tropical water and adaptive features of tropical biota have been incorporated. A comparative account of the primary productivity of phytoplankton between tropical and temperate lakes has been compiled. The diversity of tropical freshwater fishes has been described in the light of natural food, feed behavior, food plasticity, fish- zooplankton relationship, predator prey relationship and phylogenic relationship. The role of a benthic community in aquatic ecosystem has been projected. The secondary productivity in tropical aquatic ecosystems has been illustrated with tropical fish culture and water quality management"--