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134 results found
Long-term qualitative observations suggest a marked decline in quaking aspen (Populus tremuloides Michx.) primarily due to advancing succession and fire suppression. This study presents an ecoregional coarse-grid analysis of the current aspen situation using Forest Health Monitoring (FHM) data from…
Author(s): Paul Rogers
Keywords: aspen, ecosystems, forest health, forest succession, forest disturbance, populus tremuloides
Source: Forest Ecology and Management. Vol. 155, no. 1-3, pp. 223-236.
Year: 2002
Abstract. Over the years, a series of trembling aspen (Populus tremuloides Michx.) clones differing in O3 sensitivity have been identified from OTC studies. Three clones (216 and 271[(O3 tolerant] and 259 [O3 sensitive]) have been characterized for O3 sensitivity by growth and biomass…
Author(s): D.F. Karnosky, B. Mankovska, K. Percy, R.E. Dickson, G.K. Podila, J. Sober, A. Noormets, G. Hendrey, Mark D. Coleman, M. Kubiske, K.S. Pregitzer, J.G. Isebrands
Keywords: ozone, carbon dioxide, FACE, aspen, greenhouse gases, climate change, gradients
Source: Water, Air, and Soil Pollution 116: 311-322, 1999.
Year: 1999
Variable internal plant nutrient content may confound plant response to environmental stress. Plant nutrient content may be controlled with relative addition rate techniques in solution culture. However, because raising large numbers of plants in flowing solution culture is difficult. we…
Author(s): Mark D. Coleman, Richard E. Dickson, J.G. Isebrands
Keywords: Allometry, aspen, chlorophyll, nitrogen, photosynthesis, plant growth analysis, Populus tremuloides, steady-state nutrition
Source: Physiologia Plantarum 103: 513-526. 1998
Year: 1998
An approach for synthesizing the results of ecological research pertinent to land management is the analysis of the historic range of variability (HRV) for key ecosystem variables that are affected by management activities. This report provides an HRV analysis for the upland vegetation of the…
Author(s): Gregory K. Dillon, Dennis H. Knight, Carolyn B. Meyer
Keywords: aspen, bark beetles, canopy gaps, coarse woody debris, comandra blister rust, dwarf mistletoe, Engelmann spruce, fire effects, disease in Rocky Mountain forests, forest fragmentation, insects in forests, interior forest, landscape ecology, lodgepole pine, mistletoe, mountain pine beetle, ponderosa pine, roads, Rocky Mountain forests, snags, spruce beetle, subalpine fir, subalpine forests, timber harvesting effects, white pine blister rust, wind in forests
Source: Gen. Tech. Rep. RMRS-GTR-139. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 85 p.
Year: 2005
An approach for synthesizing the results of ecological research pertinent to land management is the analysis of the historic range of variability (HRV) for key ecosystem variables that are affected by management activities. This report provides an HRV analysis for the upland vegetation of the…
Author(s): Carolyn B. Meyer, Dennis H. Knight, Gregory K. Dillon
Keywords: aspen, bark beetles, canopy gaps, coarse woody debris, comandra blister rust, Douglas-fir, dwarf mistletoe, Engelmann spruce, fire effects, forest fragmentation, insects in forests, landscape ecology, lodgepole pine, mistletoe, mountain pine beetle, ponderosa pine, roads, spruce beetle, subalpine fir, subalpine forests, timber harvesting effects, white pine blister rust, wind in forests
Source: Gen. Tech. Rep. RMRS-GTR-140. Fort Collins, CO: Department of Agriculture, Forest Service, Rocky Mountain Research Station. 94 p.
Year: 2005
High temperature steam treatment of wood fiber in a closed press during fiberboard pressing and then cooling the fiberboard while still under pressure to below the glass transition temperature of lignin, greatly increased the dimensional stability and decreased the hemicellulose content of the…
Author(s): Roger Rowell, Sandra Lange, Jim McSweeny, Mark Davis
Keywords: Steam, aspen, fiberboard, dimensional stability, thickness swelling, furan, sugar analysis, hemicellulose, ferric chloride, lignin, heat treatment, wood fibers, swelling, modified wood, hygroscopicity, moisture content
Source: Proceedings of the 6th Pacific Rim Bio-Based Composites Symposium & Workshop on the Chemical Modification of Cellulosics, Portland, Oregon, USA, 2002, Volume 2. Corvallis, Or. : Wood Science and Engineering Dept., Oregon State University, c2002: pages 606-615.
Year: 2002
The multiple layer structure of oriented strandboard (OSB) has a significant influence on its performance, including thickness swell (TS). TS is recognized as an important performance property for OSB products. Optimization of TS through layer property ma- nipulation to achieve the lowest total TS…
Author(s): Hongmei Gu, Siqun Wang, Trairat Neimsuwan, Sunguo Wang
Keywords: Floors, aspen, gums, resins, particle board, moisture, verticle density profile, yellow-poplar, southern yellow pine, swelling, oriented strandboard, OSB
Source: Forest products journal. Vol. 55, no. 12 (Dec. 2005): pages 239-245
Year: 2005
Over the years, a series of trembling aspen (Populus tremuloides Michx.) clones differing in O3 sensitivity have been identified from OTC studies. Three clones (216 and 271[O3 tolerant] and 259 [O3 sensitive]) have been characterized for O3 sensitivity by growth and biomass responses, foliar…
Author(s): D. F. Karnosky, B. Mankovska, K. Percy, R. E. Dickson, G. K. Podila, J. Sober, A. Noormets, G. Hendrey, M. D. Coleman, M. Kubiske, K. S. Pregitzer, J. G. Isebrands
Keywords: ozone, carbon dioxide, FACE, aspen, greenhouse gases, climate change, gradients
Source: Water, Air, and Soil Pollution 116: 311-322
Year: 1999
We examined aspen regeneration under diferent riparian management zone (RMZ) treatments in aspen forests in northern Minnesota. We also compared aspen regeneration in partially harvested RMZs to adjacent upland clearcuts. The four RMZ treatments included: (1) full control (no cutting in RMZ or…
Author(s): Brian Palik, Kory Cease, Leanne Egeland, Charles Blinn
Keywords: Riparian forests, aspen, overstory retention, BMP
Source: Northern Journal of Applied Forestry 20(2):79-84
Year: 2003
The aim of this study was to examine the effects of elevated carbon dioxide [CO2] and ozone [O3] and their interaction on wood chemistry and anatomy of five clones of 3-year-old trembling aspen (Populus tremuloides Michx.). Wood chemistry was studied also on paper birch (Betula papyrifera Marsh.)…
Author(s): Seija Kaakinen, Katri Kostiainen, Fredrik Ek, Pekka Saranpaa, Mark E. Kubiske, Jaak Sober, David F. Karnosky, Elina Vapaavuori
Keywords: aspen, birch, cell wall, a-cellulose, climate change, fibre, hemicellulose, lignin, maple, vessel
Source: Global Change Biology. 10: 1513-1525.
Year: 2004
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