Effects of Thinning on Small Mammals in Oregon Coastal Forests

摘要: Because of fires and intensive logging practices, young forest stands dominate much the landscape Pacific Northwest. Most were reforested with Douglas-fir (Pseudotsuga menzeisii) trees at high densities. Researchers have proposed thinning densely stocked as a means to improve habitats for vertebrates. However, effects intensity on forest-floor small mammals are not well understood. During 1994-1996, we conducted experimental retrospective studies using pitfall trapping assess abundance reproduction in forests Oregon Coast Range, USA. In study, assessed short-term moderate low tree densities during first 2 years following thinning. potential long-term by comparing relative reproductive performance previously thinned (7-24 prior study) unthinned stands. Among 12 species examined number captures increased 4 decreased 1 within responses similar between moderately heavily 9 was greater 5 lower none than Furthermore, total captured higher Effects species, creeping voles (Microtus oregoni) jumping mice (Zapus trinotatus), consistent short long term. The both 7-24 Number western red-backed (Clethrionomys californicus) but Reproductive performances deer (Peromyscus maniculatus) improved Overall, did substantial detrimental any investigated had positive several. We suggest that is viable option enhance habitat quality several stocked,