Parks Canada monitors structural change in the spruce forests of Kluane National Park and Reserve following a spruce bark beetle outbreak that began in 1994. Understanding stand development after this landscape-level disturbance will be critical for assessing the resilience of this forest to a disturbance of unprecedented severity. It is also important for monitoring the impact of the outbreak on wildlife habitat and the effects of beetle salvage logging outside of the park on forest development. Sampling is done every 5 years in 50 randomly located permanent sample plots in white spruce dominated mature forests. Three sub-measures are assessed: 1) Basal area of live and dead spruce, 2) Regeneration density of spruce, and 3) Volume of downed dead wood