Forest Health Conditions in Alaska, 2004: A Forest Health Protection Report

摘要

Aerial detection mapping is conducted annually to document the location and extent of active forest insect and disease damage. These surveys (southeast Alaska, interior Alaska, and south-central Alaska) cover approximately one-fifth of the forested land in the State. Over 36 million acres throughout Alaska were surveyed in 2004. This marks an approximate 40 percent increase in acres surveyed over previous years. In 2004 forest damage, from insect, disease and select other abiotic factors, totaled 1,178,743 acres. Above average temperatures and below average precipitation in 2004 has contributed to stressed forest conditions, prime for many types of insect and disease damage.