Canadian Forest Service Publications
Survivorship bias in tree-ring reconstructions of forest tent caterpillar outbreaks using trembling aspen. 2003. Cooke, B.J.; Miller, W.E.; Roland, J. Tree-Ring Research 59(1): 29-36.
Issued by: Northern Forestry Centre
Catalog ID: 26241
When trembling aspen (Populus tremuloides Michx.) from northern Minnesota, USA, were sampled in 2000, the impact on annual radial growth of a 1951–1954 outbreak of forest tent caterpillar (Malacosoma disstria [Hbn.]) was found to be just as strong and clear as it was when estimated from samples taken in 1955. During those 45 intervening years, at least three tent caterpillar outbreaks occurred, yet the statistical distribution of ring-width profiles did not change. This suggests that survivorship bias is not a major impediment to the use of aspen ring widths for inferring the magnitude of past tent caterpillar outbreaks.