noun
biosphere; biome
Scientific term for the global sum of all ecosystems or a major regional ecological community.
生物圏は地球上の生命が存在する領域全体を指す。
The biosphere refers to the entire region of Earth where life exists.
生態系 (ecosystem) is a smaller unit within the biosphere, focusing on interactions among organisms and their environment.
Compound of 生物 (living things) and 圏 (sphere, area), a calque of English 'biosphere'.