FACTORS INFLUENCING THE FREQUENCY OF ROAD-KILLED WILDLIFE IN YELLOWSTONE NATIONAL PARK
作者： H L Robison , K A Gunther , M J Biel
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摘要: During the 8 year (1989-1996) study period, 939 large mammals were killed by vehicles on roads within Yellowstone National Park (YNP). Elk and mule deer species most often park roads. Other include bison, moose, coyote, antelope, beaver, whitetail deer, bighorn sheep, black bear, bobcat, grizzly raccoon, wolf. Vehicle-wildlife collisions pose a safety threat to people as well wildlife. visitors have been injured in vehicle with The authors analyzed frequency of roadkills relation adjacent roadside cover types, posted speed limits, actual average vehicles. They also estimated proportion park's mammal population each year. concluded that was primary factor contributing vehicle-wildlife collisions. Road design appeared influence more than limit. Cover types wildlife numbers influenced Most significantly non-forested forested types. Wildlife highest Overall, vehicle-caused mortality does not appear significant negative impact populations park. However, road-killed carcasses be source nutrition for some individual carnivores scavengers whose home ranges encompass carcass disposal sites.
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