The present book is an attempt to make the people acquainted thoroughly with the knowledge of ecosystem, and the factors concerned with the deterioration of the environment and its valued resources with the view to plan and manage the development programmes in such a way that exploitation of natural resources may not upset the balance of nature. For the major part of the terrestrial habitat, the natural vegetation was forest. All the organisms sharing the habitat had a balanced but quite competitive adjustment along themselves. Indian region is a treasure of wild genetic resource. Wild species and relatives of crop plants contain valuable genes that are of immense genetic value in crop improvement programmes. It is intended to provide a full and cover all view of the genepool conservation in the country. This book will be highly useful for understanding various aspects of Bioresources and Genepool Conservation in research and guide to students, teachers and scientists in this field