"Sudden Aspen Decline" (SAD) Photographs

Dying aspen on Mancos-Dolores Ranger District, San Juan National Forest in 2006. Photo by Phil Kemp, US Forest Service, Mancos-Dolores District.

Cytospora canker with bleeding and orange discoloration in dying aspen on Uncompahgre Plateau, March 2007. Photo by Jim Worrall, US Forest Service, Forest Health Management, Gunnison CO.

Mortality in older aspen, Goat Creek area near Lone Cone, Norwood Ranger District, Uncompahgre National Forest 2006. Photo by Jim Worrall, US Forest Service, Forest Health Management, Gunnison CO.

Aspen bark beetle galleries in dying aspen, Goat Creek area near Lone Cone near Norwood. 2006. Photo by Jim Worrall, US Forest Service, Forest Health Management, Gunnison CO.

Terror Creek, north of Paonia, Aug. 11 2007. Healthy, fine-grained pattern in center of photo is ~10 acres cut in 1984 that regenerated abundantly. Mature, unmanaged residual stands around the patch are mostly dead and dying. Photo by Jim Worrall US Forest Service, Forest Health Management, Gunnison CO.

Current aspen mortality in Terror Creek area north of Paonia along Stevens Gulch Road, 25 July 2007. Photo by Angel Watkins, US Forest Service, Forest Health Management, Gunnison CO.

Panorama of dying aspen in Terror Creek drainage, north of Paonia CO along Stevens Gulch Road, 25 July 2007. Photos by Angel Watkins, US Forest Service, Forest Health Management, Gunnison, panorama matching by Jim Worrall.