Conifer bole utilization by wood-boring beetles in western Oregon

Document Type

Article

Publication Date

1-1-1989

Abstract

Studied wood excavation by beetles in decomposing boles of 4 conifer species during the first 2 yr on the ground. Colonization density and gallery volumes were measured in experimental boles of Douglas-fir Pseudotsuga menziesii, western hemlock Tsuga heterophylla, Pacific silver fir Abies amabilis and western red cedar Thuja plicata. Ambrosia beetles (Coleoptera: Scolytidae) colonized boles only during the 1st year and were essentially restricted to Douglas-fir and western hemlock (removing 0.2% of the sapwood volume). Bark beetles (Scolytidae) colonized boles only in the 1st year, primarily in Douglas-fir and Pacific silver fir (removing 7-8% of the phloem surface area). Wood borers (Cerambycidae) excavated an additional 2.3% of the phloem surface area of Pacific silver fir in the 1st year and continued to excavate all species except Douglas-fir during the 2nd year. Consequences for the decomposition process are discussed. -from Authors

Publication Source (Journal or Book title)

Canadian Journal of Forest Research

First Page

943

Last Page

947

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