Disturbance and Forest Health in Oregon and Washington.

Abstract

The scope and intensity of disturbance by such agents as fire, insects, diseases, air pollution, and weather in Pacific Northwest forests suggests that forest health has declined in recent years in many areas. The most significant disturbances and causes of tree mortality or decline in Oregon and Washington are presented and illustrated. We discuss the interrelations of disturbance with forest management activities and the effect on native trees and suggest some solutions for reducing the severity of disturbance. One chapter reports on a forest health monitoring pilot project.

Keywords

air pollution, diseases, disturbance, fire, forest health monitoring, insects, vegetation change, weather damage

Citation

Campbell, Sally; Liegel, Leon, tech. coords. 1996. Disturbance and Forest Health in Oregon and Washington. Gen. Tech. Rep. PNW-GTR-381. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 121 p