A keystone species is one
A) that makes up a very large proportion of total community biomass.
B) that feeds on a very large fraction of all available prey species.
C) that is fed on by a very large fraction of all predators in its community.
D) whose feeding activities have a disproportionate effect on the structure of its community.
E) that occupies the lowest level (the base) of the food web.

Question

Quizplus · Accepted Answer

A keystone species is one whose feeding activities have a disproportionate effect on the structure of its community. This means that its presence or absence can greatly impact the diversity and abundance of other species in the community. Keystone species are often predators that keep the populations of their prey in check, allowing other species to thrive. Removing a keystone species can lead to cascading effects through the food web, ultimately affecting the entire ecosystem.

A Keystone Species Is One