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Interactive visualization of Douglas fir forest growth using 3-PG

Creator:: Thompson, Allison
Abstract:: Forests are important to Oregon for their beauty as well as economic value, and Douglas fir trees are among the most common and important in the state. Managing and monitoring Oregon’s forests is imperative to ensure they can remain healthy and productive. One tool that helps forest scientists to understand...
Resource Type:: Honors College Thesis
Full Text:: requirements for the degree of Honors Baccalaureate of Science in Computer Science (Honors Scholar

Comparative rates of CO₂ production from the forest floor in the Douglas-fir ecosystem

Creator:: Phillips, Michael John
Abstract:: To obtain data on the decomposition of the forest floor, a battery operated electrolytic respirometer was developed making it possible to measure CO₂ evolution from field moist forest floor samples in situ independent of root respiration. Banks of four respirometers powered by two 12-volt batteries were installed in three old...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Soil Science presented on December 4, 1975 Title: COMPARATIVE RATES OF

The effects of mycorrhizal colonization and phosphorus fertilization on Douglas-fir seedling growth, morphology, and photosynthesis

Creator:: Black, C. H. (Charles H.)
Resource Type:: Dissertation
Full Text:: CHARLES H. BLACK for the degree of Doctor of Philosophy in Soil Science presented on May 29, 1985. Title

Underplanting and competition in thinned Douglas-fir

Creator:: Brandeis, Thomas James
Abstract:: Understory conifer regeneration needs to occur beneath conifer-dominated canopies if two-storied or uneven-aged structures are to be considered for western Oregon Coast Range stand management. To ensure adequate numbers of seedlings to meet stocking or habitat structure objectives, planting may be a solution. We undertook a multi-level study to determine...
Resource Type:: Dissertation

Hierarchical analysis of spatial pattern and processes of Douglas-fir forests using wavelet analysis

Creator:: Bradshaw, G. A.
Abstract:: There has been an increased interest in the quantification of pattern in ecological systems over the past years. This interest is motivated by the desire to construct valid models which extend across many scales. Spatial methods must quantify pattern, discriminate types of pattern, and relate hierarchical phenomena across scales. Wavelet...
Resource Type:: Dissertation

Physiological control of fine root turnover in Douglas-fir

Creator:: Marshall, John D. (John David), 1956-
Abstract:: To determine whether shading increases drought-induced root mortality by changing the chemical composition of roots, I conducted an experiment in which high and low light treatments in combination with high and low soil moisture treatments were applied to seedlings of Douglas-fir (Pseudotsuqa menziesii Mirb. Franco). Because synthesis of suberin (a...
Resource Type:: Dissertation

Carbon and nitrogen allocation patterns of 2-0 Douglas-fir seedlings following nitrogen fertilization in the autumn

Creator:: Margolis, Hank A.
Abstract:: Douglas-fir (Pseudotsuga menziesii Mirb. Franco) seedlings at a nursery in western Oregon were fertilized with nitrogen in October. Free amino acid (FAA) and total nitrogen concentrations in needles, stems and fine roots were followed from before fertilization until just prior to budbreak the following spring. Before budbreak in mid-March, the...
Resource Type:: Dissertation

The estimation and significance of sapwood basal area in young Douglas-fir stands

Creator:: Dolan, Linda Sutliff
Abstract:: The relationship of sapwood basal area to basal area was examined on stands of young-growth Douglas-fir. Through non-destructive sampling, sapwood basal area was quantified on four different thinning intensities and one control (unthinned) treatment. Emphasis was on testing a sampling method and evaluating variations in the sapwood component as a...
Resource Type:: Masters Thesis

Diurnal and seasonal changes in xylem water potential, stomatal conductance and abscisic acid in five different habitat types of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Creator:: Murphy, Ellyn Margaret
Abstract:: Sapling Douglas-fir trees on five sites in the Coastal and Cascade Mountain ranges of Oregon were measured five times during the year from the summer of 1977 through the spring of 1978 for diurnal patterns of xylem water potential, stomatal conductance and abscisic acid. Vapor pressure deficit and solar radiation...
Resource Type:: Masters Thesis

Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays

Creator:: Pilz, David P.
Abstract:: Field and greenhouse bioassays were used to compare the mycorrhizal associations of Douglas-fir seedlings from undisturbed forests, and nonburned and burned portions of clearcuts on three Sites in the west-central Cascades of Oregon. Field soil transfers and greenhouse soil pasteurization and reinoculation were used to investigate soil biology and inoculum...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Interactive visualization of Douglas fir forest growth using 3-PG

Comparative rates of CO₂ production from the forest floor in the Douglas-fir ecosystem

The effects of mycorrhizal colonization and phosphorus fertilization on Douglas-fir seedling growth, morphology, and photosynthesis

Underplanting and competition in thinned Douglas-fir

Hierarchical analysis of spatial pattern and processes of Douglas-fir forests using wavelet analysis

Physiological control of fine root turnover in Douglas-fir

Carbon and nitrogen allocation patterns of 2-0 Douglas-fir seedlings following nitrogen fertilization in the autumn

The estimation and significance of sapwood basal area in young Douglas-fir stands

Diurnal and seasonal changes in xylem water potential, stomatal conductance and abscisic acid in five different habitat types of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays

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