Community (ecology)
Associated populations of species in a given area
In ecology, a community is a group or association of populations of multiple species occupying the same geographical area at the same time, also known as a biocoenosis, biotic community, biological community, ecological community, or life assemblage. The term community has a variety of uses. In its simplest form it refers to groups of organisms in a specific place or time, for example, "the fish community of Lake Ontario before industrialization".
From Wikipedia, under CC BY-SA. More on occurri.