4 ms·Biome. We no longer say ecosystem, we say "Biome".by briandilley 7y agoBiome. We no longer say ecosystem, we say "Biome".emddudley 7y agoOK so we're sidetracking here, but I have never seen anyone use "biome". Why change from "ecosystem"?MS90 7y agoCurious as well. The thesaurus lists them as synonyms, though it appears there are some minor differences in meaning when used as scientific terms.