Forestry represents a sizable portion of man’s environment. It covers approximately 1/3 of the entire surface of the Earth and about the same of the continental United States of America. Unless man seriously disturbs or alters this cover, or there are serious catastrophic events, Forest continues to live on in an indefinite basis in a given area of land. The contribution of forests towards the economic stability of nature benefits many forms of life, and that includes man. Ecology is also known as the science of the interrelationships between organisms in and to their complete environment. Forestry ecology is concerned mainly with the forest as a biological community. It deals with the interrelationships between the various trees and other living organisms comprising the community and with the interrelationships between these existing organisms and the physical environment in which they continue to exist. In other words, the study of the forest ecosystem is forest ecology.
The type of forest that we are talking about is going to be based on what are the predominant trees which are growing in a given site and that is used to classify a plant community. The ecological system or the ecosystem, it is the habitat than a forest survives in and the forest community. Technically speaking, an ecosystem is a biological term applied to a part of nature, such as the forest, which includes both nonliving material and living organisms as part of the ecosystem. An ecosystem could well be likened to an aquarium in which the water, containing a number of dissolved minerals, constitutes the physical environment. Sunlight enters the tank allowing the green plants to grow. The plans give out oxygen. The fish in turn feed on plants. Fish excrement helps feed the green plants. This environment survives entirely on its own for a time. A forest is similar but on a much larger scale.