So economic valuation of aquatic ecosystems besides other natural resources, has gained significance over the period of time. The book is an outcome of the Ph. The book presents a detailed... Thesis entitled Ecology and Economic valuation of Lake Mansar”, J&K. Moreover, economic valuation of a water body depends on its water quality, so better the water quality better will be the economic value. While protecting such a resource, conservation biologists have adopted a methodology and vocabulary of economics for the protection of diversity. The book deliberates in detail on the natural ecosystems that have long been cherished as common property resources, collectively owned by the society at large or owned by no man, with open access to everyone. It is owing to this fact that Lake Mansar has been investigated for the abiotic and biotic characteristics of this lacustrine system. D. But due to demotechnic growth the natural senescence process of these ecological systems is accelerated.