This book- synthesizes the latest research in Biological Monitoring using macroinvertebrates as indicators. The authors have addressed to predict the pollution level by using diversity of aquatic macroinvetebrates. Report on limnological conditions and macroinvertebrate-environment interactions, both are necessary and important in understanding and predicting the ecological health status of aquatic environments. This book will serve as an important resource for students and professionals studying entomology, ecology and biological monitoring and other related disciplines, as well as natural resource managers and environmental policy- makers.