Relationships between Occurrence of Bear Damage and Clearcutting in Central Honshu, Japan

January 1, 1980

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Damage to coniferous trees by black bears (Selenarctos thibetanus japonicus Schlegel) was studied in 1 man-made stand recently clearcut and in another stand 20 years old, in west-central Honshu. Diameters of stumps of bear-damaged trees in the man-made stand ranged from 9.8 cm to 29.8 cm, and, in the 20-year-old stand, trees with a dbh greater than 10.4 cm became susceptible to damage. Information on geographical distribution and history of bear damage and on species and ages of bear-damaged trees was obtained by questionnaire. Relating changes in the pattern of bear damage to the practice of clearcutting and to great declines in natural forests more than 51 years old shows that when clearcutting and man-made forests are extensive, bear damage to man-made forests increases.

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