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Thinning ponderosa pine (Pinus ponderosa) stands reduces mortality while maintaining stand productivity

Creator:: Zhang, Jianwei, Ritchie, Martin W., Maguire, Douglas A., and Oliver, William W.
Abstract:: We analyzed 45 years of data collected from three ponderosa pine (Pinus ponderosa Douglas ex P. Lawson & C. Lawson) levels-of-growing-stock installations in Oregon (OR) and northern California (CA), USA, to determine the effect of stand density regimes on stand productivity and mortality. We found that periodic annual increment (PAI)...
Resource Type:: Article
Full Text:: investigation initiated by sev- eral western research stations of the United States (US) Forest Service under a

Estimating forest productivity in the eastern Siskiyou Mountains of southwestern Oregon using a satellite driven process model, 3-PGS

Creator:: Coops, N. C. and Waring, R. H.
Abstract:: The 3-PGS (physiological principles for predicting growth using satellite data) model generates monthly estimates of transpiration, photosynthesis, and net primary production (NPP), the latter derived as a fixed proportion (0.47) of gross photosynthesis. To assess the reliability of a simplified process model (3-PGS) to predict the productive capacity of coniferous...
Resource Type:: Article
Full Text:: summer months compared well with those reported from published measurements of predawn water potentials

Regenerating white spruce, paper birch, and willow in south-central Alaska

Creator:: Cole, E. C., Newton, Michael, and Youngblood, A.
Abstract:: The current spruce bark beetle (Dendroctonus rufipennis Kirby) epidemic in interior Alaska is leaving large expanses of dead spruce with little spruce regeneration. Many of these areas are habitat for moose (Alces alces). To establish spruce regeneration and improve browse production for moose, paper birch (Betula papyrifera Marsh), willow (Salix...
Resource Type:: Article
Full Text:: . Youngblood.USDA Forest Service, Pacific Northwest Research Station, Forestry Sciences Laboratory, LaGrande, OR

Soil carbon and nitrogen pools and processes in an old-growth conifer forest 13 years after trenching

Creator:: Hart, Stephen C. and Sollins, Phil
Abstract:: We measured surface soil (0–15 cm) C and N pools and processes inside and outside an area that had been trenched 13 years earlier in an old-growth conifer forest (>450 years) to assess the long-term impacts of reduced root inputs on C and N turnover. Trenching, combined with frequent clipping...
Resource Type:: Article
Full Text:: State University, Corvallis, OR 97331, U.S.A. 1Contribution of the H.J. Andrews Ecosystem Research

Diversity and productivity of hypogeous fungal sporocarps in a variably thinned Douglas-fir forest

Creator:: Colgan, Wesley, Carey, Andrew B., Trappe, James M., Molina, Randy, and Thysell, David
Abstract:: Although ecosystem management techniques are designed to enhance species diversity in managed forests, no comprehensive study has been conducted to evaluate effects of such techniques on diversity and productivity of hypogeous fungi (truffles). During this study, truffles were collected in a 55- to 65-year-old Douglas-fir forest from March 1993 through...
Resource Type:: Article
Full Text:: . Carey and D. Thysell.United States Department of Agriculture, Forest Service, Pacific Northwest Research

Predictive mapping of forest composition and structure with direct gradient analysis and nearest-neighbor imputation in coastal Oregon, U.S.A.

Creator:: Ohmann, Janet L. and Gregory, Matthew J.
Abstract:: Spatially explicit information on the species composition and structure of forest vegetation is needed at broad spatial scales for natural resource policy analysis and ecological research. We present a method for predictive vegetation mapping that applies direct gradient analysis and nearest-neighbor imputation to ascribe detailed ground attributes of vegetation to...
Resource Type:: Article
Full Text:: vegetation is needed at broad spatial scales for natural resource policy analysis and ecological research. We

The effect of local stand structure on growth and growth efficiency in heterogeneous stands of ponderosa pine and lodgepole pine in central Oregon

Creator:: Mainwaring, Douglas B. and Maguire, Douglas A. (Douglas Alan)
Abstract:: Basal area and height growth were analyzed for individual trees in uneven-aged ponderosa pine (Pinus ponderosa Dougl. ex Laws.) and lodgepole pine (Pinus contorta Dougl. ex. Loud.) stands in central Oregon. Basal area growth was modeled as a function of other stand and tree variables to address three general objectives:...
Resource Type:: Article
Full Text:: . Published on the NRC Research Press Web site at http://cjfr.nrc.ca on 20 November 2004. D.B. Mainwaring1

Soil respiration response to prescribed burning and thinning in mixed-conifer and hardwood forests

Creator:: Concilio, Amy, Ma, Siyan, Li, Qinglin, LeMoine, James, Chen, Jiquan, North, Malcolm, Moorhead, Daryl, and Jensen, Randy
Abstract:: The effects of management on soil carbon efflux in different ecosystems are still largely unknown yet crucial to both our understanding and management of global carbon flux. To compare the effects of common forest management practices on soil carbon cycling, we measured soil respiration rate (SRR) in a mixed-conifer and...
Resource Type:: Article
Full Text:: Forest Ecosystem Project Symposium: An Experimental Approach to Landscape Research, St. Louis, Mo., 3–5

Effect of thinning and prescribed fire restoration treatments on woody debris and snag dynamics in a Sierran old-growth, mixed-conifer forest

Creator:: Innes, James C., North, Malcolm P., and Williamson, Nathan
Abstract:: Forest managers have little information of the effects of common restoration treatments, thinning and burning, on dead woody material (DWM) dynamics in fire-suppressed forests. Fine woody debris (FWD; 0.6–29.9 cm), coarse woody debris (CWD; ≥30.0 cm), and snags (≥5 cm) were inventoried and mapped in eighteen 4 ha plots before...
Resource Type:: Article
Full Text:: . Accepted 28 June 2006. Published on the NRC Research Press Web site at http://cjfr.nrc.ca on 13 February

Enlargement of canopy gaps associated with a fungal pathogen in Yosemite Valley, California

Creator:: Rizzo, D. M., Slaughter, G. W., and Parmeter, J. R.
Abstract:: The enlargement of 21 canopy gaps associated with the root pathogen Heterobasidion annosum (Fr.:Fr.) Bref. (; Fomes annosus (Fr.) Karst.) in the mixed-conifer forest of Yosemite Valley was monitored between 1971 and 1998. Mean expanded gap area was 232 m2 (range 38–802 m2) in 1971 and 1455 m2 (range 150–4216...
Resource Type:: Article
Full Text:: annosumon pine and incense-cedar in Califor- nia forests.In Proceedings of the Symposium on Research and

ScholarsArchive@OSU

Thinning ponderosa pine (Pinus ponderosa) stands reduces mortality while maintaining stand productivity

Estimating forest productivity in the eastern Siskiyou Mountains of southwestern Oregon using a satellite driven process model, 3-PGS

Regenerating white spruce, paper birch, and willow in south-central Alaska

Soil carbon and nitrogen pools and processes in an old-growth conifer forest 13 years after trenching

Diversity and productivity of hypogeous fungal sporocarps in a variably thinned Douglas-fir forest

Predictive mapping of forest composition and structure with direct gradient analysis and nearest-neighbor imputation in coastal Oregon, U.S.A.

The effect of local stand structure on growth and growth efficiency in heterogeneous stands of ponderosa pine and lodgepole pine in central Oregon

Soil respiration response to prescribed burning and thinning in mixed-conifer and hardwood forests

Effect of thinning and prescribed fire restoration treatments on woody debris and snag dynamics in a Sierran old-growth, mixed-conifer forest

Enlargement of canopy gaps associated with a fungal pathogen in Yosemite Valley, California

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