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4,885 results found
Buffers along streams cover a tremendous proportion of the land base in the forested systems of the western Pacific Northwest. These buffers were designated primarily to conserve and restore habitat for salmon and trout, but conservation of habitat for a number of other organisms also has been…
Author(s): Sally Duncan
Keywords: Stream buffers, amphibians, riparian management, Olympic Peninsula
Source: Science Findings. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. May (53): 1-5
Year: 2003
Rural areas of the Pacific Northwest experienced a dramatic growth in population during the late 1980s to early 1990s. This growth was fueled by both push and pull factors, including environmental and natural resource based amenities. Such growth has not only stressed the capacity of rural counties…
Author(s): Stephen F. McCool, Linda E. Kruger
Keywords: Human migration, population growth, natural resource management, environmental amenities, social and environmental change, population dynamics
Source: Gen. Tech. Rep. PNW-GTR-580. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 19 p
Year: 2003
The effects of partial cutting on plant species richness, community structure, and several understory species that are important for deer forage were evaluated on 73 plots in 18 stands throughout southeast Alaska. These partially cut stands were harvested 12–96 years ago when 16- 96% of the former…
Author(s): Robert L. Deal
Source: Canadian Journal of Forest Research. 31: 2067-2079
Year: 2001
Knowledge of the survival of the Pileated Woodpecker (Dryocopus pileatus) is essential in managing viable populations of the species. In eight study areas in northeastern Oregon, survivorship of adult Pileated Woodpeckers was 0.60 after 6 mo, 0.47 after 12 me, and 0.35 after 18 mo. Of…
Author(s): Evelyn L. Bull
Source: Journal of Field Ornithology. 72(1): 131-135
Year: 2001
Vertebrate herbivores can be effective agents of biological weed control in certain applications. I compared the use of domestic geese for weed control in an agricultural field with the herbicide hexazinone and with hand control. Newly planted spruce seedlings acted as a prototype crop that would…
Author(s): Tricia L. Wurtz
Keywords: biological weed control, domestic geese, hexazinone, Picea glauca
Source: Ecological Applications. 5(3): 570-578.
Year: 1995
Knowledge of the community structure of ectomycorrhizal fungi among successional forest age-classes is critical for conserving fungal species diversity. Hypogeous and epigeous sporocarps were collected from three replicate stands in each of three forest age-classes (young, rotation-age, and old-…
Author(s): J.E. Smith, R. Molina, M.M.P. Huso, D.L. Luoma, D. McKay, M.A. Castellano, T. Lebel, Y. Valachovic
Keywords: ectomycorrhizal fungi, sporocarp production, forest succession, Pseudotsuga menziesii, Tsuga heterophylla zone, biodiversity
Source: Canadian Journal of Botany. 80: 186-204
Year: 2002
Western hemlock (Tsuga heterophylla) can be characterized by localized regions of high-moisture-content wood, often referred to as wet pockets, and uneven drying conditions may occur when lumber of higher and lower moisture content is mixed together in a dry kiln. The primary objective of…
Author(s): David L. Nicholls, Allen M. Brackley, Travis Allen
Keywords: Western hemlock, Tsuga heterophylla, lumber, drying, sawmill, moisture content, Alaska
Source: Res. Note PNW-RN-530. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 8 p
Year: 2003
Overall hunter demand for deer on Prince of Wales Island, Alaska, has not changed significantly in the last 10 years, although demand has increased in five communities on the island. These five communities each experienced a decline in household median income between 1989 and 1999. In communities…
Author(s): Rhonda Mazza
Keywords: Hunting, subsistence, southeast Alaska, Prince of Wales Island, Sitka blacktailed deer
Source: Gen. Tech. Rep. PNW-GTR-581. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 21 p
Year: 2003
A new parameter recovery model for Johnson's SB distribution is developed. This latest alternative approach permits recovery of the range and both shape parameters. Previous models recovered only the two shape parameters. Also, a simple procedure for estimating the distribution minimum from sample…
Author(s): Bernard R. Parresol
Keywords: Diameter distributions, kurtosis, Newton-Raphson method, moments, parameter recovery model, percentiles, Pinus taeda, skewness
Source: Res. Pap. SRS-31. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 9 p.
Year: 2003
How do we promote resistance to disturbance, resilience when disturbance does occur, and forest health in general when forests and landscapes are actively managed for a variety values? How do we manage for sustainability when humans and their consumption patterns are munching up the earth at…
Author(s): Sally Duncan
Source: Science Findings 54. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 5 p
Year: 2003