This Reference Book on the topic entitled "Environmental Regeneration Dominance and Species Diversity of Tree Species in Forest Ecosystems of Submontane and Montane Zones of Garhwal Himalaya" revealed that the study areas are least investigated and deserved to be studied in detail for increasing status of management for sustainable conservation of the rich biodiversity. The study has implications for management of forest resources. The information on vegetation would be helpful in solving ecological problems such as biological conservation and management options, and will help in better understanding of species abundance, resource partitioning, predictions of future changes, facilitating comparison among taxa, and resource utilization. The information generated through this investigation would certainly help forming baseline for future research studies in this rich biodiversity area as well as in developing plans for using natural resources sustainably.