Biotic communities (Topical Term)

Phylogenetic approaches to community ecology, c2006.

The encyc. of Earth, via WWW, Mar. 3, 2009 (Community ecology is the branch of ecology that studies how interactions among species and between species and the abiotic environment affect community structure, including species richness, species diversity and patterns of species abundance)

Encyc. Britannica online, Mar. 3, 2009 (community ecology: study of the organization and functioning of communities, which are assemblages of interacting populations of the species living within a particular area or habitat)