In ecology, what is a 'keystone species'?
Answer and explanation
Correct answer: D. a species that exerts disproportionate ecological influence relative to its abundance
- Step 1: A keystone species (e.g., sea otters, apex predators) has a massive impact on community structure that is disproportionately large compared to its biomass. Answer: a species that exerts disproportionate ecological influence relative to its abundance. Why not the others: Dominant species are abundant; pioneer species initiate succession.
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