What term describes a species with a disproportionately large effect on a community relative to its abundance?

Question

Quizplus · Accepted Answer

A keystone species has a disproportionately large effect on a community relative to its abundance. Pioneer species are the first to colonize a new area, indicator species provide information about environmental conditions, exotic species are non-native to the ecosystem, and invasive species harm the ecosystem they are in.

What Term Describes a Species with a Disproportionately Large Effect