Quaternary Consumer — Definition & Role

A trophic cascade happens when a lower trophic level is suddenly free from predation and eats much more of the trophic level below it.

A keystone species is a species that is integral to an ecological community. Keystone species are often quaternary consumers, like the wolves in Yellowstone.

Bioaccumulation happens when toxins build up in organisms at higher trophic levels because they consume smaller amounts of toxins present in many of their prey.