What ecological term describes the regulation of prey populations by apex predators preventing competitive dominance?

Answer

Top-down trophic cascade.

Apex predators regulate prey populations through direct consumption, preventing a single herbivore from dominating the landscape and resources, a process ecologists term a "top-down trophic cascade."

What ecological term describes the regulation of prey populations by apex predators preventing competitive dominance?
speciesEcologyRolekeystone species