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Thinning Mixed-Species Stands of Douglas-Fir and Western Hemlock in the Presence of Swiss Needle Cast: Guidelines Based on Relative Basal Area Growth of Individual Trees

Creator:: Zhao, Junhui, Maguire, Douglas A., Mainwaring, Douglas B., Wehage, Jon, and Kanaskie, Alan
Abstract:: In coastal forests of the Pacific Northwest, young coniferous plantations typically contain a mixture of planted and natural Douglas-fir (Pseudotsuga menziesii) and western hemlock (Tsuga heterophylla). Swiss needle cast (SNC) disease inhibits the growth of Douglas-fir to varying degrees in these stands, depending on SNC severity. In addition to the...
Resource Type:: Article
Full Text:: Thinning Mixed-Species Stands of Douglas-Fir and

Forest stand structure and pattern of old-growth Western Hemlock/Douglas-Fir and mixed-conifer forests

Creator:: North, Malcolm, Chen, Jiquan, Oakley, Brian, Song, Bo, Rudnicki, Mark, Gray, Andrew, and Innes, Jim
Abstract:: With fire suppression, many western forests are expected to have fewer gaps and higher stem density of shade-tolerant species as light competition becomes a more significant influence on stand pattern and composition. We compared species composition, structure, spatial pattern, and environmental factors such as light and soil moisture between two...
Resource Type:: Article
Full Text:: Hemlock/Douglas- Fir and Mixed-Conifer Forests Malcolm North, Jiquan Chen, Brian Oakley, Bo Song, Mark

Multiscale Controls on Natural Regeneration Dynamics after Partial Overstory Removal in Douglas-Fir Forests in Western Oregon, USA

Creator:: Dodson, Erich K., Burton, Julia I., and Puettmann, Klaus J.
Abstract:: We examined natural regeneration following operational-scale variable density retention treatments in 40-60 year old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests at seven sites for a decade following treatment. Treatments included residual overstory densities of 300, 200, and 100 trees/ha, with leave islands and gaps of three sizes (0.1, 0.2, and...
Resource Type:: Article
Full Text:: , Centralia, WA, US. 9 10 Kuehne, C., and K.J. Puettmann. 2008. Natural regeneration in thinned Douglas

Sources of Variation in the Self-Thinning Boundary Line for Three Species with Varying Levels of Shade Tolerance

Creator:: Weiskittel, Aaron, Gould, Peter, and Temesgen, Hailemariam
Abstract:: The species self-thinning boundary line has been widely analyzed with a variety of statistical techniques. Most previous studies in the forestry literature have reported that the relationship does not differ across a range of stand and site factors, but these studies have primarily used statistical techniques that make model fitting...
Resource Type:: Article
Full Text:: test the influence of additional covariates. Using extensive even-aged coastal Douglas-fir (Pseudotsuga

Estimation of Aboveground Forest Carbon Flux in Oregon: Adding Components of Change to Stock-Difference Assessments

Creator:: Gray, Andrew N., Whittier, Thomas R., and Azuma, David L.
Abstract:: A substantial portion of the carbon (C) emitted by human activity is apparently being stored in forest ecosystems in the Northern Hemisphere, but the magnitude and cause are not precisely understood. Current official estimates of forest C flux are based on a combination of field measurements and other methods. The...
Resource Type:: Article
Full Text:: . Gray, Thomas R. Whittier, and David L. Azuma A substantial portion of the carbon (C) emitted by human

Prediction of Wood Fiber Attributes from LiDAR-Derived Forest Canopy Indicators

Creator:: Hilker, Thomas, Frazer, Gordon W., Coops, Nicholas C., Wulder, Michael A., Newnham, Glenn J., Stewart, James D., van Leeuwen, Martin, and Culvenor, Darius S.
Abstract:: We investigated the potential use of airborne light detection and ranging (LiDAR) data to predict key wood fiber properties from extrinsic indicators in lodgepole pine leading forest stands located in the foothills of central Alberta, Canada. Six wood fiber attributes (wood density, cell perimeter, cell coarseness, mature fiber length, microfibril...
Resource Type:: Article
Full Text:: Forest Canopy Indicators Thomas Hilker, Gordon W. Frazer, Nicholas C. Coops, Michael A. Wulder, Glenn J

Sampling Strategies for Efficient Estimation of Tree Foliage Biomass

Creator:: Temesgen, Hailemariam, Monleon, Vicente, Weiskittel, Aaron, and Wilson, Duncan
Abstract:: Conifer crowns can be highly variable both within and between trees, particularly with respect to foliage biomass and leaf area. A variety of sampling schemes have been used to estimate biomass and leaf area at the individual tree and stand scales. Rarely has the effectiveness of these sampling schemes been...
Resource Type:: Article
Full Text:: sets for Douglas-fir (Pseudotsuga menziesii var. menziesii [Mirb.] Franco) and ponderosa pine (Pinus

Management of Riparian Buffers: Upslope Thinning with Downslope Impacts

Creator:: Ruzicka, Kenneth J., Jr., Puettmann, Klaus J., and Olson, Deanna H.
Abstract:: We examined the potential of using upslope density management to influence growth and drought tolerance of trees in untreated downslope riparian forests. Increment cores from Douglas-fir trees in three mature stands in western Oregon, USA, were collected and measured. Trees responded to an apparent edge effect up to 15 m...
Resource Type:: Article
Full Text:: Douglas-fir trees in three mature stands in western Oregon, USA, were collected and measured. Trees

Effects of vegetation patches on soil nutrient pools and fluxes within a mixed-conifer forest

Creator:: Erickson, Heather E., Soto, Patricia, Johnson, Dale W., Roath, Brent, and Hunsaker, Carolyn
Abstract:: At a spatially heterogeneous mixed-conifer forest in the central California Sierras, we quantified total carbon (C) and nitrogen (N), inorganic N, and net N mineralization in organic (O) and surface (0–15 cm) mineral soils, and in situ fluxes of inorganic N and ortho-phosphate using resin lysimeters under three patch types:...
Resource Type:: Article
Full Text:: California Sierras, we quantified total carbon (C) and nitrogen (N), inorganic N, and net N mineralization in

Biophysical controls on soil respiration in the dominant patch types of an old-growth, mixed-conifer forest

Creator:: Ma, Siyan, Chen, Jiquan, Butnor, John R., North, Malcolm, Euskirchen, Eugenie S., and Oakley, Brian
Abstract:: Little is known about biophysical controls on soil respiration in California’s Sierra Nevada oldgrowth, mixed-conifer forests. Using portable and automated soil respiration sampling units, we measured soil respiration rate (SRR) in three dominant patch types: closed canopy (CC), ceanothus-dominated patches (CECO), and open canopy (OC). SRR varied significantly among the...
Resource Type:: Article
Full Text:: soil C flux summed by an area-weighted average across all three patch types was 660 � 163 g C m�2 from

ScholarsArchive@OSU

Thinning Mixed-Species Stands of Douglas-Fir and Western Hemlock in the Presence of Swiss Needle Cast: Guidelines Based on Relative Basal Area Growth of Individual Trees

Forest stand structure and pattern of old-growth Western Hemlock/Douglas-Fir and mixed-conifer forests

Multiscale Controls on Natural Regeneration Dynamics after Partial Overstory Removal in Douglas-Fir Forests in Western Oregon, USA

Sources of Variation in the Self-Thinning Boundary Line for Three Species with Varying Levels of Shade Tolerance

Estimation of Aboveground Forest Carbon Flux in Oregon: Adding Components of Change to Stock-Difference Assessments

Prediction of Wood Fiber Attributes from LiDAR-Derived Forest Canopy Indicators

Sampling Strategies for Efficient Estimation of Tree Foliage Biomass

Management of Riparian Buffers: Upslope Thinning with Downslope Impacts

Effects of vegetation patches on soil nutrient pools and fluxes within a mixed-conifer forest

Biophysical controls on soil respiration in the dominant patch types of an old-growth, mixed-conifer forest

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