See Also: biosphere(medicine)
biosphere(encyclopedia)
biosphere(dictionary)
Rio Platano Biosphere Reserve(tourism)

biosphere (sh)




Relatively thin life-supporting stratum of the earth's surface, extending from a few miles into the atmosphere to the deep-sea vents of the oceans.

The biosphere is a global ecosystem that can be broken down into regional or local ecosystems, or biomes. Organisms in the biosphere are classified into trophic levels (see food chain) and communities.