The field of biology which focuses on the interactions between the biophysical environment and the organisms which dwell in it is known as ecology. It is closely related to the sciences of genetics, ethology and evolutionary biology. This field of science seeks to understand the effect which biodiversity has on ecological function. There are a number of fields which employ principles from ecology such as agroforestry, conservation biology, agriculture, community health, economics and natural resource management. The actively interacting systems which are made up of organisms, their communities as well as the non-living elements of their surroundings are known as ecosystems. The topics included in this book on ecology are of utmost significance and bound to provide incredible insights to readers. Those in search of information to further their knowledge will be greatly assisted by it. The book will serve as a reference to a broad spectrum of readers.