Forest health monitoring: 2006 national technical reportThis article contains other documents. View all titles contained within this article here.
The Forest Health Monitoring Program’s annual national technical report presents results of forest health analyses from a national perspective using data from a variety of sources. The report is organized according to the Criteria and Indicators for the Conservation and Sustainable Management of Temperate and Boreal Forests of the Santiago Declaration. Drought in 2005 is presented, and drought over the decade 1996–005 is compared with the historical average. The relationship between lightning frequency and forest fire occurrence is investigated. National air pollution data are used to estimate the exposure of forests to ozone, wet sulfate deposition, and wet deposition of inorganic nitrogen. Baseline results of lichens, as an indicator of air pollution in the Pacific Northwest, are presented. Aerial survey data are used to identify hotspots of insect and disease activity based on the relative exposure to defoliation- and mortality-causing agents. Marine cargo data are analyzed to identify locations where exotic insect pests are likely to be introduced. Forest Inventory and Analysis crown condition data are analyzed to identify spatial clusters of plots where trees have relatively poor crowns, which might indicate forest health problems.