In 1917, Joseph Grinnell an American ornithologist first proposed the term niche in ecology.
Niche is defined as the ultimate distributional unit within a species is restrained by the limitations of its physical structure and its physiology. The habitat and niche the basic are closely related. Charles Eton, considered the niche, the basic role of an organism in the community what it does in and for living community, its relationship to its food and enemies. In order words he denied the niche as the species occupation.
