keystone species

Noun

(ecology) A species that exerts a large, stabilizing influence throughout an ecological community, despite its relatively small numerical abundance.

Japanese Meaning

生態系内で、個体数は比較的少ないものの、全体の安定性や構造に決定的な影響を与える種

Sea otters are a keystone species that help maintain kelp forest ecosystems by preying on sea urchins.

ラッコはウニを捕食することで、海藻林の生態系の安定に寄与する鍵となる種です。

Sense（1）

(ecology) A species that exerts a large, stabilizing influence throughout an ecological community, despite its relatively small numerical abundance.

keystone species

（ plural ）