The Keystone Species in a Pacific Northwest Old Growth Forest

Multiple Choice

The keystone species in a Pacific Northwest Old Growth Forest

A) is the Spotted owl, that preys on rodents.
B) are the mice that feed on mushrooms and truffles.
C) are the Douglas fir trees that are dominant species.
D) are the Douglas squirrels that spread the seeds of the Douglas fir.
E) are the piliated woodpeckers that nest in Douglas fir.