Abstract
opment. Later there were arguments about whether or not predator control was necessary to increase the abundance of big game. Currently the reintroduction of wolves (Canis lupus) is being debated, and there is considerable pressure to reduce the elk (Cervus elaphus) population. Another controversy developed over whether the Greater Yellowstone Area (GYA) is large enough to support grizzly bears (Ursus arctos) without supplemental food. Park management policies continue to evolve as new information is obtained. effects of fire suppression, predator control, and supplemental feeding often have been difficult to assess. To be sure, they have changed the character of Yellowstone. As Aldo Leopold wrote about Glacier National Park in 1927, The balance of nature in any strict sense has been upset long ago ... only option we have is to create a new balance
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