Rosenberg, Daniel K.; Anthony, Robert G. 1993. Differences in Townsend's chipmunk populations between second- and old-growth forests in western Oregon. Journal of Wildlife Management. 57(2): 365-373.
Because Townsend's chipmunks (Toortas tournsendii) may be important in maintaining naturalecosystem processes in forests in the central Oregon Cascade Range, we compared their population char-acteristics in young second-growth and old-growth forests. We live-trapped Townsend's chipmunks in 5young (30-60 yr old) second-growth and 5 old-growth (>400 yr old) Douglas-fir (Pseudotsuga menziesit)stands during spring and autumn 1987-90 in western Oregon. We tested the null hypothesis of no differencein characteristics of chipmunk populations in these 2 stand age-classes. Densities ranged from 0.4 to 10.3chipmunks/ha and were greater (P