Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Mortality of white spruce during a spruce beetle outbreak on the Kenai Peninsula in Alaska.

Abstract

[See FA 40, 2610] White spruce stands in the Resurrection Creek catchment were infested by Dendroctonus rufipennis between 1974 and 1975. Thirty permanent plots were established within the infested area in 1976, and revisited annually for 5 years. Between 1976 and 1980, 29% of all white spruce was killed by spruce beetles, equivalent to 59% of the commercial white spruce vol. in the area. Mortality was greatest in the larger diam. classes during the early part of the infestation, but smaller diam. trees were subsequently attacked as the number of noninfested trees declined. The effect of spruce beetles on structure and species composition of white spruce stands is described and implications for management are discussed.