Being that grey wolves are a keystone species in North America, after their reintroduction into the Yellowstone ecosystem, which of the following events occurred?
A)The number of predators in the ecosystem was increased.
B)The number of prey in the ecosystem was reduced.
C)The plant composition became more varied and lush.
D)All of the above occurred.

Question

Quizplus · Accepted Answer

The reintroduction of grey wolves to Yellowstone led to a series of ecological changes: it increased the number of predators, reduced the number of prey (such as elk), and indirectly allowed plant life to become more varied and lush due to reduced grazing pressure, showcasing a classic example of a trophic cascade.

Being That Grey Wolves Are a Keystone Species in North