The Distribution of Bats in Different Ages of Douglas-Fir Forests

Abstract

I examined the distribution of activity of bats in different-age Douglas-fir (Pseudotsuga menziesii) stands in the Pacific Northwest. Bat activity was higher (P 300 m elevation in the Washington Cascades, but were common at elevations >300 m in the Oregon Coast Range. Reductions in old-growth forests may have a more severe impact on populations of breeding bats in the Oregon Coast Range than in the Washington Cascades.