The influence of overstory openness on the reproductive
ecology of Pacific yew (Taxus brevifolia Nutt.) was
investigated on 4 sites in western Oregon over 2 years. The
breeding system of T. brevifolia was found to deviate from
pure dioecy under a broad range of canopy and site
conditions. Production of...
Clearcut and shelterwood reproduction methods are both important, silviculturally viable reforestation tools for southwest Oregon. The ecology of local forests lends itself to the successful application of either method, in most cases; thus, choice of method is typically based on land management objectives, which integrate social and resource values, economics,...
This publication brings together in one place information on the general characteristics, biology and management, harvesting and utilization, wood characteristics, and related literature of Pacific Northwest hardwoods. Species included are bigleaf maple, black cottonwood, California black oak, California-laurel, giant chinkapin, Oregon ash, Oregon white oak, Pacific madrone, red alder, and...
This annotated bibliography was compiled to provide a comprehensive list of sources on the ecological factors that affect forest regeneration. Abstracts from 494 publications are indexed by author, species, and subject, and are arranged into 4 major sections. Topics include the effects of biotic factors, abiotic factors, and stand and...
Soil bulk density and disturbance were measured before and after a commercial
thinning of 3 0-50 year-old Douglas-fir using a cut-to-length (CTL) and a skyline system
on the Willamette National Forest in the Oregon Cascades. A dual-probe nuclear
densimeter was used to measure bulk density at four and eight inches....
Knowledge of regional-scale patterns of plant community structure and controlling factors is largely qualitative and based on numerous local studies. Data from a subsample of 10,000 field plots were used to quantify and map compositional gradients of woody plant communities across Oregon forests. Canonical correspondence analyses explained 9-14% of the...