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Transformation of Western Hemlock Tree Crowns by Dwarf Mistletoe

Creator:: Calkins, Stephen J.
Abstract:: Hemlock dwarf mistletoe (Arceuthobium tsugense subsp. tsugense) is an arboreal, hemiparasitic plant that principally parasitizes western hemlock (Tsuga heterophylla). Hemlock dwarf mistletoe exerts a profound influence on infected trees that can drastically change the structure of the tree crown due to reduced growth, top dieback, branch deformation and death, resulting...
Resource Type:: Masters Thesis
Full Text:: decrease the efficiency of western hemlock foliage and affect the water transport efficiency of infected

Effect of high temperature drying on bending and shear strengths of western hemlock

Creator:: Thiam, Massamba
Abstract:: The advantages of high-temperature drying are faster drying, reduced inventory, reduced energy requirements, and reduced equilibrium moisture content. However the disadvantages are higher initial costs of the kiln, greater power needs, knot dropout, and reduction in some strength properties. The latter was the subject of this study. Three hundred pieces...
Resource Type:: Masters Thesis
Full Text:: of High Temperature Drying on Bending and Shear Strengths of Western Hemlock. Michael R. Milota

The impact of wood variability on the drying rate at different moisture content levels

Creator:: Berberović, Adin
Abstract:: Variability in wood properties causes boards within a stack of lumber to dry at different rates and reach different moisture content levels after drying is completed. The consequence is that the boards will have properties that differ from ones that were intended to be achieved by the drying process. The...
Resource Type:: Dissertation
Full Text:: behavior was investigated for western hemlock (Tsuga heterophylla) lumber. Board weights were

Early genetic selection for wood stiffness in juvenile Douglas-fir and western hemlock

Creator:: Urhan, Oguz S.
Abstract:: Wood modulus of elasticity (MOE), also known as wood stiffness, is one of the most important wood properties. Wood stiffness is a measure of the resistance to deflection, and is important because some products such as laminated veneer lumber, plywood, and dimension lumber require stiff and strong wood. Incorporating wood...
Resource Type:: Masters Thesis
Full Text:: Douglas fir and Western Hemlock. AN ABSTRACT OF THE THESIS OF Oguz S. Urhan for the degree of

Effects of release from suppression on hydraulic architecture, photosynthetic capacity and functional wood characteristics in Douglas-fir and western hemlock

Creator:: Renninger, Heidi
Abstract:: Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), a shade intolerant species, and western hemlock (Tsuga heterophylla (Raf.) Sarg.), a shade tolerant species, were compared to learn more about the temporal pattern of release from suppression in both species, whether hydraulic architecture or photosynthetic capacity constrain release and how wood functional properties change...
Resource Type:: Masters Thesis
Full Text:: equivalent minimum water potential, stomatal conductance of western hemlock was found to be more sensitive

Modeling the fixed bed drying characteristics of biomass particles

Creator:: Yang, Hai
Abstract:: The fixed bed drying of western hemlock and Douglas-fir biomass particles at temperatures ranging from 50°C to 200°C and air velocities from 0.3 to 0.9 m/s was investigated. The objectives were to describe the drying characteristics of the particles, fit a model for thin-layer drying, and develop and test a...
Resource Type:: Masters Thesis
Full Text:: fixed bed drying of western hemlock and Douglas-fir biomass particles at temperatures ranging from 50

Impacts of dwarf mistletoe on the physiology of host Tsuga heterophylla trees as recorded in tree ring C and O stable isotopes

Creator:: Marias, Danielle E.
Abstract:: Dwarf mistletoes, obligate, parasitic plants with diminutive aerial shoots, have long-term effects on host tree water relations, hydraulic architecture, and photosynthetic gas exchange and can eventually lead to tree death. To investigate the long-term impacts of dwarf mistletoe on gas exchange of host western hemlock trees, I compared growth, gas...
Resource Type:: Masters Thesis
Full Text:: related to interception of water and fixed carbon. Water use of western hemlock (Tsuga heterophylla

Comparison of the water relations characteristics of woody plants in western Oregon

Creator:: Davis, Kent J.
Abstract:: I studied the water relations traits, twig conductivity, C'3 isotopic composition, and wood density of three conifer and five angiosperm species in western Oregon. This study took place from spring 2002 to fall 2003 on four sites. Species were selected to represent the diversity of drought tolerance of woody plants...
Resource Type:: Masters Thesis
Full Text:: Water Relations Characteristics of Woody Plants in Western Oregon. Abstract approved Donald B.Zobe

Pathogenicity of Phytophthora species from Oregon waterways

Creator:: Navarro, Sarah M.
Abstract:: Described as one of the most destructive pathogens of agricultural crops and forest trees, Phytophthora is a genus of microorganisms containing over 100 known species. Phytophthora alni has caused collar and root disease in alders throughout Europe and a form of the species has recently been isolated in North America....
Resource Type:: Masters Thesis
Full Text:: conifers include: Douglas-fir (Pseudotsuga menziesii), western hemlock (Tsuga heterophylla), western

Examining effectiveness of Oregon’s forest practice rules for maintaining warm-season maximum stream temperature patterns in the Oregon Coast Range

Creator:: Fleuret, Jennifer Marie
Abstract:: Stream temperature, as an important component of stream ecosystems, can be affected by forest harvesting through removal of riparian shade and changes in hydrology. Riparian Management Areas (RMAs), as implemented through the current Oregon Forest Practice Rules, are designed, in part, to maintain stream temperature following forest harvesting. However, effectiveness...
Resource Type:: Masters Thesis
Full Text:: temperatures than nearby riparian zone soil water temperature after a harvest in western Washington, which

ScholarsArchive@OSU

Transformation of Western Hemlock Tree Crowns by Dwarf Mistletoe

Effect of high temperature drying on bending and shear strengths of western hemlock

The impact of wood variability on the drying rate at different moisture content levels

Early genetic selection for wood stiffness in juvenile Douglas-fir and western hemlock

Effects of release from suppression on hydraulic architecture, photosynthetic capacity and functional wood characteristics in Douglas-fir and western hemlock

Modeling the fixed bed drying characteristics of biomass particles

Impacts of dwarf mistletoe on the physiology of host Tsuga heterophylla trees as recorded in tree ring C and O stable isotopes

Comparison of the water relations characteristics of woody plants in western Oregon

Pathogenicity of Phytophthora species from Oregon waterways

Examining effectiveness of Oregon’s forest practice rules for maintaining warm-season maximum stream temperature patterns in the Oregon Coast Range

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