Abstract
In deciduous forests, tree seeds and seedlings are frequently exposed to high predation by small rodents, and this predation can have an important effect on forest regeneration. However, damage to large trees by small rodents has not been studied, except for damage observed during timber production. To determine factors affecting damage to large trees by the grey red-backed vole (Myodes rufocanus bedfordiae), the characteristics and spatial patterns of tree damage by voles at vole wintering sites were examined over 3 years in a deciduous forest in Hokkaido. This study found that the location of damaged trees was related to vole wintering sites. Vole damage was affected by tree species. Damaged trees were heavily concentrated in small areas. Leaning trees and trees that had suffered previous damage were more likely to be damaged. However, the diameter at breast height was not significantly related to vole damage. These differences in susceptibility to vole damage may result in different tree mortality.
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