Index Catalog // Hyrax

In-forest log segregation based on acoustic measurement of wood stiffness

Schöpfer:: Amishev, Dzhamal Y.
Abstract:: To remain competitive, the forest products industry needs to look for new and innovative processes and technologies to not only reduce costs but also to recover more value through the entire seedling-to-customer forest products supply chain. It is well recognized that measuring wood properties of logs in real time during...
Resource Type:: Dissertation

Development of a hybrid modeling framework for intensively managed Douglas-fir plantations in the Pacific Northwest

Schöpfer:: Weiskittel, Aaron R.
Abstract:: Forest growth models in the Pacific Northwest are predominantly empirical. Predictions of yield under alternative silvicultural regimes cannot rely completely on field trials; yet empirical growth models are often inadequate for extrapolating untested regimes and genotypes. The limitations of current models include (1) long time-steps (e.g. 5-10 years); (2) insufficient...
Resource Type:: Dissertation
Full Text:: Pacific Northwest (PNW). In both empirical and process-based models, the influence of crown

Estimating spatial changes in acoustic velocity in felled Douglas-fir stems

Schöpfer:: Dowding, Bodie
Abstract:: To compete with other building materials, the wood products industry must find a way to increase value and lower costs. Wood stiffness is important for most wood uses. Value can be increased and costs can be lowered by sorting logs for stiffness in the woods using acoustic devices mounted on...
Resource Type:: Masters Thesis

Effect of Root and Shoot Manipulation on the Morphology and Physiology of Oregon White Oak (Quercus garryana) Seedlings in the Nursery and Following Outplanting

Schöpfer:: Baumgart, Erin E.
Abstract:: Oregon white oak, or Garry oak (Quercus garryana), has been adversely affected by land-use conversion, landscape fragmentation, and anthropogenic fire suppression. Its historical range has contracted significantly to the point where an estimated 1-5% remains intact. Natural regeneration is difficult due to a lack of seed sources and the physiological...
Resource Type:: Masters Thesis
Full Text:: Department of Agriculture, Forest Service, Pacific Northwest Research Station, General Technical Report PNW

Ungulates and Forest Management : Understanding Interactions Between Large Herbivores and Fuels Reduction Treatments on Shrub Assemblages in the Intermountain West

Schöpfer:: Hall Defrees, Dallas K.
Abstract:: Deciduous shrubs are an integral component of mixed conifer forests of the interior Pacific Northwest by providing structural complexity, forage, and niche habitat. Currently, these species are under pressure from high levels of ungulate herbivory and forest management activities such as fuels reduction treatments. Ungulate herbivory is influential in the...
Resource Type:: Masters Thesis

Douglas-fir Seedlings in the Pacific Northwest: The Genetics of Drought Adaptation

Schöpfer:: Celer, Erda
Abstract:: Douglas-fir (Pseudotsuga menziesii) is a widely distributed, ecologically important, and commercially valuable tree species in North America. However, climate change is expected to adversely impact Douglas-fir trees, and assisted migration may become necessary to lessen the effects of climate change. Because drought stress is one of the projected effects of...
Resource Type:: Masters Thesis

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

Schöpfer:: 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:: vaginatum subsp. cryptopodum on Pinus ponderosa. Oecologia 146: 179–189. Brooks JR, Mitchell AK. 2011

Interactions between nitrogen, phosphorus, and molybdenum in forest soils and cyanobacterial lichen in the Oregon Coast Range

Schöpfer:: Marks, Jade A.
Abstract:: Molybdenum is an essential component of biogeochemical cycling, most notably as a component of the nitrogenase enzyme used in biological nitrogen (N) fixation. While the important role of phosphorus (P) in limiting N fixation in ecosystems has been well documented, occurrence and prevalence of molybdenum (Mo) limitation is largely unknown....
Resource Type:: Masters Thesis
Full Text:: floor, 5 soil extractable pools, bulk soil, bedrock and τMoNb..………………189 B2: Significance tests for

Genetic Structure in Populations of the Douglas-fir Swiss Needle Cast Fungus Nothophaeocryptopus gaeumannii

Schöpfer:: Bennett, Patrick I.
Abstract:: The fungus Nothophaeocryptopus gaeumannii is the causative agent of Swiss needle cast (SNC), a foliar disease of Douglas-fir. Disease is characterized by premature loss of foliage and reduced growth resulting from the inhibition of photosynthesis due to the occlusion of stomata by the ascocarps of N. gaeumannii. Although the disease...
Resource Type:: Dissertation

Hyrax

In-forest log segregation based on acoustic measurement of wood stiffness

Development of a hybrid modeling framework for intensively managed Douglas-fir plantations in the Pacific Northwest

Estimating spatial changes in acoustic velocity in felled Douglas-fir stems

Effect of Root and Shoot Manipulation on the Morphology and Physiology of Oregon White Oak (Quercus garryana) Seedlings in the Nursery and Following Outplanting

Ungulates and Forest Management : Understanding Interactions Between Large Herbivores and Fuels Reduction Treatments on Shrub Assemblages in the Intermountain West

Douglas-fir Seedlings in the Pacific Northwest: The Genetics of Drought Adaptation

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

Interactions between nitrogen, phosphorus, and molybdenum in forest soils and cyanobacterial lichen in the Oregon Coast Range

Genetic Structure in Populations of the Douglas-fir Swiss Needle Cast Fungus Nothophaeocryptopus gaeumannii

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