U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station; RM-164
Aspens die from canker disease infections as a result of mechanical injuries to the live bark inflicted by thoughtless campers. Dead trees usually are cut to reduce camper hazard. Aspen loss is related to campground age. A desirable aspen-type camp unit can be degraded to a treeless site of grass, forbs, and shrubs within 10 to 20 years. The management of aspen campgrounds must be altered if the resource is to be maintained.
Hinds TE. 1976. Aspen mortality in Rocky Mountain campgrounds. Fort Collins, Colorado: Rocky Mountain Forest and Range Experiment Station. Research Paper RM-164. 20 p.