出典:Wiktionary
出典:『Wiktionary』 (2026/04/12 21:07 UTC 版)
keystone species (plural keystone species)
出典:Wikipedia
出典:『Wikipedia』 (2011/08/04 17:45 UTC 版)
A keystone species is a species that has a disproportionate effect on its environment relative to its biomass. Such species play a critical role in maintaining the structure of an ecological community, affecting many other organisms in an ecosystem and helping to determine the types and numbers of various other species in the community.