Effects of Grazing by Wild Ungulates in Yellowstone National Park

摘要

The studies were conducted under the Northern Range Research Program from 1986 to1991. The program addressed the population dynamics and ecological effects of native ungulates (elk, bison, moose, pronghorn, bighorn sheep, mule deer) on the soil, vegetation, and watersheds of the Northern Range. Most studies were funded through the Natural Resource Preservation, Post-Fire, and Wolf Study Programs by the U.S. Department of the Interior, National Park Service (NPS).