Biological diversity encompasses all species of animals, plants, micro-organisms, ecosystem and ecological processes of which they are part. Biodiversity provides the basis for life on earth. The more we know about Earth's biological diversity, the better will be our capability to conserve both terrestrial and aquatic ecosystems. Expanding human population, overexploitation of natural resources, habitat loss and pollution are contributing to a great extent to the rapid degradation of environmental quality, with its irreversible loss or depletion of species diversity. The current perception is therefore to frame strategies to conserve biodiversity otherwise the future generation will blame us for robbing them for their life support systems. This book includes original research articles on various aspects of Biodiversity and its Conservation presented by eminent Scientists working within the country and abroad. Most of the concepts are new and pertinent to Indian context. This book will be of immense utility to the Researchers and Post-Graduate students engaged in varied areas of Biodiversity conservation.

This Is A Reprint Of A Volume Of The Gazetteer Of The Nellore District Brought Upto 1938 Originally Published In 1942 And Contains Information On The District-Physical Features, Political History, The People, Agriculture And Irrigation, Forests, Occupation And Trade, Communications, Rainfall And Seasons, Public Health, Education, Land Revenue, Miscellenous Revenues, Justice, Local Administration And Taluk Gazetters. A Reference Tool.

Aquatic plants continue to create problems associated with navigation, flood control, agriculture, irrigation and drainage, values of lands, conservation of wildlife and fisheries, and water resource supply. While much research is being done to find more effective and economic control measures, there is now a great need to apply known facts to achieve a measure of control by the means available. It is the purpose of this volume to provide a scientifically documented treatise of the known facts as they apply to the control of aquatic weeds in river basins and their allied waterways with particular emphasis on alligator weed and water hyacinth.