Cengage Advantage Books: Sustaining the Earth 10th Edition by Tyler Miller,Scott Spoolman

تمرين 13

Do you think it was a good idea to reintroduce populations of the gray wolf in the Yellowstone ecosystem in the United States (Science Focus, p. 119)? Explain. Another keystone species in the Yellowstone ecosystem is the grizzly bear. Suppose the grizzly bears had died out and had been removed from the park. Would you support a program to reintroduce this species into the ecosystem? Explain.