Keystone Species
핵심종
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<speciesfyi-glossary slug="keystone-species"></speciesfyi-glossary>Definition
A species that has a disproportionately large effect on its ecosystem relative to its abundance.
Detailed Explanation
Sea otters are a textbook keystone species: by preying on sea urchins, they prevent urchin populations from overgrazing kelp forests. Remove otters and kelp collapses, eliminating habitat for hundreds of species. Wolves in Yellowstone similarly triggered a trophic cascade that changed river morphology. Identifying keystones is a conservation priority because protecting one species can preserve an entire ecosystem.