Forest refers to a complex ecological system in which trees dominate other life forms. They are the most diverse ecosystems on land since they contain a huge majority of Earth's terrestrial species including animals, plants, fungi and microorganisms. Coniferous forests, tropical rainforests and deciduous forests are the three main categories of forests. A forest ecosystem is a wide area of land that contains a large number of trees and other woody plants. It is home to a wide variety of animals and provides all basic needs including medicinal plants, wood and timber. Sustainable management of forest ecosystems is desirable when forest diversity faces threats such as resource exploitation, poor management, excessive usage and old age. Forest ecosystems are susceptible to disruption and damage if not properly sustained. This book unfolds the innovative aspects related to the sustainability and diversity of forest ecosystems. It presents researches and studies performed by experts across the globe. This book is a complete source of knowledge on this area of study.