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Stumps fumigated with chloropicrin: effects on surrounding plants

Creator:: Luoma, Daniel L. and Thies, Walter G.
Abstract:: Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stumps, both healthy and infected by Phellinus weirii (Murr.)Gilbertson, were fumigated with chloropicrin at a clearcut site on Washington s Olympic Peninsula. Vegetation cover on plots adjacent to treated and untreated stumps was evaluated to determine fumigant effects on vascular plants and moss. Ninety-eight vascular...
Resource Type:: Article
Full Text:: . Ninety-eight vascular plant species were recorded during the course of the study. Only those species with

Leaf-level physiology in four subalpine plants in tephra-impacted forests during drought

Creator:: Watt, Abby J., Fischer, Dylan G., Antos, Joseph A., and Zobel, Donald B.
Abstract:: Ecological impacts of climate change in the Pacific Northwest may hinge on acclimation to drier summers, highlighting the importance of plant physiological studies in forests. Evaluating dominant forest plant species under old-growth and managed forest conditions is similarly important as timber harvest might change microclimates and alter drought effects on...
Resource Type:: Article
Full Text:: summers, highlight- ing the importance of plant physiological studies in forests. Evaluating dominant

Incorporation of nitrogen from decomposing red alder leaves into plants and soil of a recent clearcut in Oregon

Creator:: Swanston, Christopher W. and Myrold, David Douglas
Abstract:: Nitrogen incorporation from red alder (Alnus rubra Bong.) into an Oregon upland mesic forest soil was studied by tracing the fate of 15N added as 15N-labeled alder leaf litter. The recovery of 15N in vegetation, litter, light- and heavy-fractions of the soil, the chloroform-labile (microbial biomass) pool, and the whole...
Resource Type:: Article
Full Text:: studied by tracing the fate of15N added as15N-labeled alder leaf litter. The recovery of15N in vegetation

Strobilus production and growth of Pacific yew under a range of overstory conditions in western Oregon

Creator:: DeFazio, S. P., Vance, N. C., and Wilson, M. V.
Abstract:: Strobilus production, growth, and morphology of Pacific yew (Taxus brevifolia Nutt.) were examined at three sites in the Cascade Mountains and one site in the Willamette Valley of western Oregon. Strobilus production on branch segments was positively associated with overstory openness for male and female trees at all four sites...
Resource Type:: Article
Full Text:: openness above and to the south of each study tree was estimated with an LAI-2000 plant canopy analyzer (LI

The growing season carbon balance of a sub-boreal clearcut 5 years after harvesting using two independent approaches to measure ecosystem CO₂ flux

Creator:: Pypker, Thomas G. and Fredeen, Arthur L.
Abstract:: From 27 June to 3 September 1999, CO2 fluxes from a 5-year-old, 84.15-ha vegetated clearcut in sub-boreal British Columbia were measured using a Bowen ratio energy balance (BREB) system and a second approach (the component model) that was based on scaled up CO2-flux measurements from belowground and plants (spruce seedlings...
Resource Type:: Article
Full Text:: plant photosynthesis (–375 g C·m–2). The conifer seedlings were only a minor component in overall CO2

Effects of stand density on the growth of young Douglas-fir trees

Creator:: Woodruff, David R., Bond, Barbara J., Ritchie, Gary A., and Scott, William
Abstract:: The objectives of this study were (i) to provide further evidence of a positive correlation of stand density with early growth of coastal Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii); (ii) to determine when after planting the positive growth response occurs and how long it lasts; and (iii) to use...
Resource Type:: Article
Full Text:: ways of thinking about the biology and physiology of plant interaction and competition. Using stable

The CP4 transgene provides high levels of tolerance to Roundup® herbicide in field-grown hybrid poplars

Creator:: Meilan, R., Han, K.-H., Ma, C., DiFazio, Stephen P., Eaton, J. A., Hoien, E. A., Stanton, B. J., Crockett, R. P., Taylor, M. L., James, R. R., Skinner, J. S., Jouanin, L., Pilate, G., and Strauss, S. H.
Abstract:: We tested two genes together in hybrid poplars (genus Populus), CP4 and GOX, for imparting tolerance to glyphosate (the active ingredient in Roundup® herbicide). Using Agrobacterium-based transformation, 80 independent transgenic lines (i.e., products of asexual gene transfer) were produced in a variety of hybrid poplar clones (40 lines in Populus...
Resource Type:: Article
Full Text:: . Constructs Nearly all transgenic lines were produced with the plant transformation vector, pV-LEGT02

The effects of Phytophthora ramorum infection on hydraulic conductivity and tylosis formation in tanoak sapwood

Creator:: Collins, B. R., Parke, J. L., Lachenbruch, Barbara, and Hansen, E. M.
Abstract:: Tanoak (Lithocarpus densiflorus (Hook. and Arn.) Rehder) is highly susceptible to sudden oak death, a disease caused by the oomycete Phytophthora ramorum Werres, De Cock & Man in’t Veld. Symptoms include a dying crown, bleeding cankers, and, eventually, death of infected trees. The cause of mortality is not well understood,...
Resource Type:: Article
Full Text:: effectors that damage host plant cell membranes (Manter et al. 2007). Since tyloses are essentially part of

Pathogens and insects in a pristine forest ecosystem: the Sierra San Pedro Martir, Baja, Mexico

Creator:: Maloney, Patricia E. and Rizzo, David M.
Abstract:: We determined the incidence of pathogens and insects across mixed-conifer stands in the Sierra San Pedro Martir (SSPM) of northern Baja, Mexico, to assess the role of pests in a pristine forest ecosystem. We also determined the spatial distribution of the two most common pests, mistletoe, Phoradendron pauciflorum Torrey, and...
Resource Type:: Article
Full Text:: determine the density of hosts per cell. If mistletoe was present, the severity of infec- tion was estimated

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:: Table 1 for brief stand descriptions.) During the 1966 growing season, plant water potential was mea

ScholarsArchive@OSU

Stumps fumigated with chloropicrin: effects on surrounding plants

Leaf-level physiology in four subalpine plants in tephra-impacted forests during drought

Incorporation of nitrogen from decomposing red alder leaves into plants and soil of a recent clearcut in Oregon

Strobilus production and growth of Pacific yew under a range of overstory conditions in western Oregon

The growing season carbon balance of a sub-boreal clearcut 5 years after harvesting using two independent approaches to measure ecosystem CO₂ flux

Effects of stand density on the growth of young Douglas-fir trees

The CP4 transgene provides high levels of tolerance to Roundup® herbicide in field-grown hybrid poplars

The effects of Phytophthora ramorum infection on hydraulic conductivity and tylosis formation in tanoak sapwood

Pathogens and insects in a pristine forest ecosystem: the Sierra San Pedro Martir, Baja, Mexico

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

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