Predators may increase the biodiversity of communities by preventing a single species from becoming <answer>dominant</answer>. Such predators are known as keystone species and may have a profound influence on the balance of organisms in a particular ecosystem. Introduction or removal of this predator, or changes in its population density, can have drastic cascading effects on the equilibrium of many other populations in the ecosystem. For example, grazers of a grassland may prevent a single <answer>dominant</answer> species from taking over.
When a keystone species is lost another species might become?
dominant