Search Constraints

Start Over
Filtering by: Creator Irving, David C. Remove constraint Creator: Irving, David C. Committee Member Myrold, David Remove constraint Committee Member: Myrold, David

Search Results

  • Interspecific carbon transfer in ectomycorrhizal tree species mixtures

    Creator:
    Simard, S. (Suzanne)
    Abstract:
    The overall goal of this study was to investigate influences of ectomycorrhizae (EM) and interspecific carbon transfer on seedling performance in species mixtures. The objectives were to: (I) determine the potential for EM to link paper birch and Douglas-fir, (ii) quantify gross and net interspecific carbon transfer, and (iii) evaluate...
    Resource Type:
    Dissertation

  • Patterns of carbon storage within a mature northern highbush blueberry production system

    Creator:
    Nemeth, Denise Alexandra
    Abstract:
    The objectives of this study were to: 1) determine how organic matter (incorporated vs. surface mulch) and nitrogen fertilization rate impact northern highbush blueberry (Vaccinium corymbosum L.) plant biomass, carbon accumulation, plant losses and allocation, and mycorrhizal infection in mature plants, and 2) determine the magnitude of carbon fluxes (carbon...
    Resource Type:
    Dissertation
    Full Text:
    Production System Abstract Approved: Bernadine C. Strik

  • Plastome phylogenomics in the genus Pinus using massively parallel sequencing technology

    Creator:
    Parks, Matthew Benjamin
    Abstract:
    This thesis summarizes work completed over the previous four years primarily focusing on chloroplast phylogenomic inquiry into the genus Pinus and related Pinaceae outgroups using next-generation sequencing on Illumina platforms. During the time of our work, Illumina sequence read lengths have essentially been limited to 25 to 100 base pairs,...
    Resource Type:
    Dissertation
    Full Text:
    : ___________________________________________________________________________ Aaron I. Liston Richard C. Cronn This thesis summarizes work completed over the

  • Top-Down Effects of Wildlife and Bottom-Up Drivers of Soils and Productivity in Intensively Managed Forest Plantations in the Northern Oregon Coast Range

    Creator:
    Frey, David W.
    Abstract:
    In intensively managed forest plantations in the northern Oregon Coast Range, herbicides are often applied during site preparation and early stand regeneration to reduce competition for resources for planted conifer seedlings. In addition to reducing competition for crop trees, herbicide applications may affect soil processes including decomposition and nutrient cycling,...
    Resource Type:
    Masters Thesis
    Full Text:
    THESIS OF David Frey for the degree of Master of Science in Sustainable Forest Management

  • The use of LiDAR to identify forest transportation networks

    Creator:
    Beck, Storm J. C.
    Abstract:
    The production of high value non-conventional products, such as long utility poles; or the production of low value bulky products, such as chips or grindings; provide opportunities for forest owners to increase value from their forests. The transport of these products requires the use of specialized trucks and trailers. However,...
    Resource Type:
    Masters Thesis
    Full Text:
    , and Dr. David Myrold for their continuing support and encouragement throughout this entire process

  • High Strength Reinforcing Bars : Concrete Shear Friction Interface Behavior

    Creator:
    Nielson, Drew R.
    Abstract:
    Use of high-strength steel (HSS) reinforcing bars could provide constructability and economic benefits for the construction of structures, reducing the initial and ultimately the life-cycle cost of bridge and building structural elements. This thesis summarizes work performed in a research project on the use of HSS reinforcing bars for concrete...
    Resource Type:
    Masters Thesis
    Full Text:
    : High Strength Reinforcing Bars: Concrete Shear Friction Interface Behavior Abstract approved: David

  • Stable isotope probing of the ovine rumen for RDX degrading microorganisms

    Creator:
    Mitchell, Edward A.
    Abstract:
    The anaerobic and highly reductive conditions found in the ovine rumen are considered favorable for the degradation of the nitroaromatic explosives such as hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX). In this study, we used stable-isotope-probing to determine the bacteria responsible for the degradation of RDX in the rumen. Results indicate 10 μg mL⁻¹ (45...
    Resource Type:
    Masters Thesis
    Full Text:
    of RDX is relatively low and has been measured to be approximately 38.4 mg L-1 at 20°C. Regular

  • Influence of Soil Texture on Carbon Storage of PNW Coastal Blue Carbon Ecosystems

    Creator:
    Fox, Conner S.
    Abstract:
    Coastal blue carbon ecosystems offer a variety of important ecosystem services, including exceptional rates of carbon sequestration and long-term carbon storage. Because these ecosystems disproportionately influence global carbon cycling, understanding their soil characteristics may help guide long-term climate change mitigation and adaptation strategies. Recently, Kauffman et al. (2020) observed the...
    Resource Type:
    Honors College Thesis
    Full Text:
    stocks ranged from 411 ± 70 Mg C ha-1 in low marshes to 822 ± 95 Mg C ha-1 in tidal forests (Kauffman

  • Land surface energy balance and surface soil moisture variation in HAPEX-MOBILHY

    Creator:
    Nichols, William E.
    Abstract:
    The HAPEX-MOBILHY regional experiment provided an significant opportunity to analyze the partition of energy and distribution of water over land surfaces. The combination of remotely sensed data and ground instrument networks over the large-scale in situ experiment allowed investigation of spatial and temporal variation of such hydrologic parameters as the...
    Resource Type:
    Masters Thesis
    Full Text:
    . David Myrold, and Dr. David Thomas, all merit appreciation for their time and suggestions. Thanks are

  • Data assessment in Oregon for SafetyAnalyst based on Highway Safety Manual Part B

    Creator:
    Li, Meng
    Abstract:
    The author of the Highway Safety Manual (HSM) Part B developed a predictive method for safety management. A software tool for highway safety system analysis called the SafetyAnalyst is developed basing on HSM Part B. The author describes an effort to evaluate the feasibility of SafetyAnalyst in Oregon. Seven sample...
    Resource Type:
    Masters Thesis
    Full Text:
    .................................................................................. 105 APPENDIX B RECODING FOR VARIABLE V1FIRSTEVENT ............................... 106 APPENDIX C