It was Haeckel who invented the word ecology, which means a study of animals and plants in their relationship to each other and to their environment. Ecological studies deals with the web of life that entangles every species with lives of others and each species with its non-living environment as a whole and each element or factor of that environment. Odum has preferred to define ecology as the study of the structure and function of nature. But new horizon of ecology now relies on a variety of disciplines like physics, chemistry, mathematics, meteorology, climatology, geology, geography, etc. an essential aspect of these studies is concerned with energy transformation occurring within ecosystems. The present book entitled Ecological Studies: New Horizons is an unique compilation of advance research articles of ecology which will be helpful in opening new horizon of ecological studies and will be very much helpful for the students, research scholars, professors, scientists as well as for those who have interest in ecological studies.'