Search Constraints

Start Over
Filtering by: Creator Howe, Glenn T. Remove constraint Creator: Howe, Glenn T. Rights Statement In Copyright Remove constraint Rights Statement: In Copyright

Search Results

  • Identifying site characteristics that explain variation in Douglas-fir site productivity and stem form

    Creator:
    Magalska, Lauren E.
    Abstract:
    Foresters care about site productivity and stem quality in Douglas-fir plantations for many reasons. The profitability of forest land and the economic returns on silvicultural investments are directly related to site productivity. Thus, understanding the relationships among Douglas-fir productivity, stem form and site characteristics is important economically. My objective was...
    Resource Type:
    Masters Thesis
    Full Text:
    Stem Form. Abstract approved: Glenn T. Howe Foresters care about site productivity and

  • Projecting White Pine Blister Rust Hazard Ratings Under Climate Change in Southwestern Oregon

    Creator:
    Cicekli, Zeynep
    Abstract:
    Sugar pine and western white pine are widely distributed, economically valuable, and ecologically important native tree species in North America. However, white pine blister rust (WPBR), caused by a non-native fungal pathogen, Cronartium ribicola J.C. Fisch. in Rabh., has substantially affected populations of these species. Cronartium is an obligate parasite,...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: ______________________________________________________ Glenn T. Howe Sugar pine

  • Climate-based Seed Deployment Zones for the Pacific Northwest

    Creator:
    McClure, Meridith L.
    Abstract:
    Native populations of forest trees are specifically adapted to the climates they inhabit. The farther trees are moved from their local climates (i.e., as the climatic transfer distance increases), the more growth and survival tend to decrease. The transfer limit is the climatic transfer distance beyond which plantation performance is...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Glenn T. Howe Native populations of forest trees are specifically adapted to the

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

    Creator:
    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
    Full Text:
    . ACKNOWLEDGEMENTS I would like to express my sincere gratitude to my advisor, Dr. Glenn T. Howe, for his

  • Stiffness of Douglas-fir lumber : effects of wood properties and genetics

    Creator:
    Vikram, Vikas
    Abstract:
    Wood stiffness is one of the most important properties of lumber and veneer. We studied wood stiffness (modulus of elasticity, MOE), wood density, microfibril angle, and knots in a 25 year-old wind pollinated progeny test (50 families, ~ 373 trees) of coastal Douglas-fir to understand the potential for genetically improving...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Glenn T. Howe Wood stiffness is one of the most important properties of lumber and veneer

  • 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:
    : _____________________________________________________________________ Glenn T. Howe Wood modulus of elasticity (MOE), also known as wood stiffness, is one of

  • Societal Responses to Using Genetic Engineering for Mitigating Chestnut Blight and Restoring American Chestnut Trees

    Creator:
    Petit, Joshua D.
    Abstract:
    Forests face health threats from pests and diseases (e.g., mountain pine beetle, emerald ash borer, chestnut blight [CB], Swiss needle cast), and other issues such as climate change. Interventions such as genetic engineering (GE) have shown promise for mitigating some of these threats. CB, for example, has impacted most American...
    Resource Type:
    Dissertation
    Full Text:
    his unending support, and truly consider him my mentor and friend for life. Dr. Glenn Howe, the Co

  • Identifying candidate genes associated with cold adaptation in Douglas-fir using DNA microarrays

    Creator:
    Howe, Dana Kathryn
    Abstract:
    In forest trees from temperate and boreal regions, cold acclimation is an important adaptive trait that involves changes in gene expression and physiology. Genecological, quantitative genetic, and QTL studies have been used to study the genetics of cold acclimation in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), but the genes responsible for...
    Resource Type:
    Masters Thesis
    Full Text:
    Microarrays. Abstract approved: Glenn T. Howe Amy M. Brunner

  • Climate Change and Management Considerations for the Boreal Forest Zone

    Creator:
    Habeeb, Gabrielle A.
    Abstract:
    The boreal forest zone is located in the cool, high latitudes of the earth and represents approximately one third of the world’s remaining forested area. Maintaining the functional capacity of boreal forests is of global importance as they will both affect and be affected by climate change. Boreal forests can...
    Resource Type:
    Capstone Project

  • Growth, morphology, and in vitro development of transgenic poplars with RNAi-inhibited PtDDM1-1/2 gene expression

    Creator:
    Zhu, Ruoqing
    Abstract:
    Epigenetic mechanisms are important for control of plant development, and may play a particularly important role in trees given their long life cycles and distinctive and stable tissue types. To help understand the role of epigenetics in tree development, we produced transgenic poplars with reduced activity of the DDM1 genes,...
    Resource Type:
    Masters Thesis
    Full Text:
    .................................................... 35 2. The T-DNA structure and primer sites for the PtDDM1 RNAi construct within the pCAPD (pART27