Welcome to the World 's Biomes Page! Biomes are defined as "the world 's major communities, cl.ified according to the predominant vegetation and characterized by adaptations of organisms to that particular environment" Campbell . Biomes are cl.ified in various ways. This page will group biomes into five major types .Because biomes are described according to the structural characteristics of their dominant organisms in this example, coniferous trees growing under a particular The character of the open-water, or pelagic oceanic biome is determined by physical and chemical environmental factors, particularly waves, tides, currents, .There are more than a dozen basic terrestrial and aquatic biomes or ecosystems, including boreal coniferous forests, deserts, tundra, and underwater environments. Combined with these features of the biological community are aspects of the inorganic realm that likewise define a biome, for instance, climate and the .What is a biome? Biomes are very large ecological areas on the earth 's surface, with fauna and flora animals and plants adapting to their environment. Biomes are In these five, there are many sub-biomes, under which are many more well defined ecosystems. It also plays a very important role in climate formation..