Biome

n.	1.	(Ecology) a specific type of complex ecological community characterized by specific environmental conditions and a distinctive group of plants and animals, maintained in a relatively stable equilibrium, such as a rain forest biome or prairie biome.
	2.	a particular region which is a biome{1}.

Noun

1.

biome - a major biotic community characterized by the dominant forms of plant life and the prevailing climate

biotic community, community, desert, forest, grassland, timber, timberland, woodland