Forest health monitoring in the United States: a program overview.

摘要

The Forest Health Monitoring Programme in the United States is a science-based, comprehensive monitoring system that provides statistically precise and accurate baseline and forest health trend information to determine detrimental changes or improvements that occur in our forests over time. This programme, initiated in 1990 to provide information on forest health and sustainability, consists of four separate, interrelated activities, including detection monitoring, evaluation monitoring, research on monitoring techniques, and intensive site monitoring. Descriptions and examples are provided for each activity.