Variable retention harvest promotes biodiversity conservation in managed boreal forests by ensuring forest continuity and structural complexity. However, do post-harvest and post-fire patches maintain the same structural complexity? This study compares post-harvest and post-fire residual patches and proposes retention modalities that can maintain the same structural complexity as in natural for...

Wildfire severity and subsequent ecological effects may be influenced by prior land management, via modification of forest structure and lingering changes in fuels. In 2002, the Hayman wildfire burned as a low to moderate-severity surface fire through a 21-year pine regeneration experiment with two overstory harvest cuttings (shelterwood, seed-tree) and two site preparations (scarified, unscari...

The retention of trees in harvest units is an integral part of forest management practices on federal lands in the northwestern United States (U.S.), yet the ecological benefits that result from various levels or patterns of retained trees remain speculative. Large-scale and long-term silvicultural experiments are needed to evaluate the effects of alternative forest management strategies on bio...

Long-term fire suppression and cessation of aboriginal burning has resulted in forest ingrowth and associated structural and functional changes to dry, fire-maintained forests of southeastern British Columbia. In this experimental study, effects of ecosystem restoration treatments (prescribed fire, partial harvesting, prescribed fire and partial harvesting, and untreated controls) on cavity-nes...

Standing dead trees, or snags, serve myriad functions in natural forests, but are often scarce forests managed for timber production. Variable retention (VR), the of live and trees through harvest, has been adopted globally as a less intensive form regeneration harvest. In this study, we explore how two key elements VR systems — level (amount) spatial pattern live-tree affect carryover post-har...

This study investigated alternative in-field chemical controls against Bactrocera tryoni (Froggatt). Bioassay 1 tested the mortality of adults exposed to fruit and filter paper dipped in insecticide, and the topical application of insecticide to adults/fruit. Bioassay 2 measured the mortality of adults permitted to oviposit on fruit dipped in insecticide and aged 0, 1, 3, or 5 days, plus the pr...