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Filtering by: Creator Shaw, Wesley D. Remove constraint Creator: Shaw, Wesley D. Committee Member Shaw, David Remove constraint Committee Member: Shaw, David

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  • Post-fire recreation management in the Mt. Jefferson Wilderness

    Creator:
    Brown, Ryan N. K.
    Abstract:
    Natural events such as wildfires, floods, and storms can significantly alter the short-term structure and functioning of natural systems. Recreation in wilderness areas is one instance in which individuals are directly exposed to post-disturbance landscapes. Consequently, public land managers may be faced with a different set of challenges stemming from...
    Resource Type:
    Masters Thesis
    Full Text:
    providing excellent input and challenging questions. Thanks also to Dave Shaw for serving as my graduate

  • Susceptibility of coast redwood seedlings to Phytophthora ramorum

    Creator:
    Lucas, Sunny L.
    Abstract:
    Coast redwood (Sequoia sempervirens) (D. Don) Endl. is a host for Phytophthora ramorum but it was unclear if the pathogen represents a significant disease risk to this tree species. In this study the susceptibility of coast redwood seedlings and the likelihood of sporulation on redwood were examined. Two methods were...
    Resource Type:
    Masters Thesis
    Full Text:
    ______________________________________________________________________ Jennifer L. Parke Coast redwood (Sequoia sempervirens) (D. Don) Endl. is a host for

  • Height-related trends in structure and function of Douglas-fir foliage

    Creator:
    Woodruff, David R.
    Abstract:
    This dissertation investigated the impacts of tree height upon a range of physiological and structural characteristics of Douglas-fir foliage; relationships between structural and functional trends with height; and compensatory mechanisms that mitigate height-related growth constraints. Height-related trends in foliar physiological and anatomical characteristics were examined both within trees as well...
    Resource Type:
    Dissertation
    Full Text:
    ), tracheid number (c), tracheid length (d), pit number (e), and thickness to span ratio (tw/b)2 (f). Bars

  • Environmental impacts on native bumble bee pollinators in an agricultural landscape of western Oregon

    Creator:
    Skyrm, Kimberly M.
    Abstract:
    Bumble bees provide vital pollination services in both native and agricultural landscapes. However, in recent years, bumble bee populations have experienced global population declines. The primary causes of these declines have been attributed to the environmental impacts of pathogens, pesticide use and habitat fragmentation. While research has examined the impacts...
    Resource Type:
    Dissertation
    Full Text:
    References Alford, D. V. 1975. Bumblebees. Davis-Poynter, London, England. Besard, L., V. Mommaerts, J

  • Light detection and ranging (LiDAR) : what we can and cannot see in the forest for the trees

    Creator:
    Edson, Curtis B.
    Abstract:
    Recently concerns over anthropogenic carbon pollution have received increased global attention and research in forest biomass and carbon sequestration has gained momentum. Light Detection and Ranging (LiDAR) remote sensing has in the last decade demonstrated forest measurement and biomass estimation potential. The project objective was to compare LiDAR forest biomass...
    Resource Type:
    Dissertation
    Full Text:
    thankful for the willingness of Anne Nolin, Dave Shaw and Lisa Ganio to serve on my multidisciplinary

  • Groundwater and stormwater treatment at western wood preserving facilities : an analysis of current treatment methods

    Creator:
    Ragan, Anita M.
    Abstract:
    The Pacific Northwest is blessed with an abundance of precipitation. This rainfall, however, can have important consequences for industries that must process the resulting stormwater for proper discharge. This is particularly true of wood treatment facilities. Past management practices at wood preserving facilities located in the Western United States create...
    Resource Type:
    Masters Thesis
    Full Text:
    Methods. Abstract approved: Christopher D. Knowles Jeffrey J

  • Understanding Citizen Advisory Boards : A National Census of Tree Boards

    Creator:
    Greenleaf, Sarah (Sarah Maleno)
    Abstract:
    Effective management of urban forests is vital to society due to the numerous ecological, economic, and social benefits they provide. In many cities, management efforts are commonly supported by citizen advisory groups, which are often generically referred to as “tree boards” within the urban forestry context. Very little is known...
    Resource Type:
    Masters Thesis
    Full Text:
    Paul D. Ries Effective management of urban forests is vital to society due to the numerous

  • Phytophthora ramorum within an Oregon tanoak forest : quantifying inoculum within canopy throughfall vs. soil splash

    Creator:
    Benemann, Silvia, E.
    Abstract:
    Phytophthora ramorum continues to cause extensive mortality of tanoaks in southwestern Oregon. Rain readily washes inoculum down through the canopy, causing new infections on the lower parts of the tree and neighboring host plants. Although this aspect of dispersal is well understood, the relative importance of infested soil and leaf...
    Resource Type:
    Masters Thesis
    Full Text:
    Appendix D: Gravimetric soil content and soil temperature at 5cm depth…………..89 Appendix E: Verification

  • Contributions of Epicormic Branches and Delayed Adaptive Foliage in Coastal Douglas-fir under Variable Density Management Regimes

    Creator:
    Punches, John W.
    Abstract:
    The contribution of delayed adaptive reiteration to crown maintenance was explored across a wide range of adjacent open space conditions in early-mature (approximately 60 year old) Douglas-fir located on the eastern slope of Oregon’s Coast Range. The stands had experienced uniform thinning in 1964-65 and 1980-81 to release dominant and...
    Resource Type:
    Dissertation
    Full Text:
    ...................................................................... 103 Appendix D: Branch lengths and proportions of foliation, by branch type

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

    Creator:
    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
    Full Text:
    . His confidence in my abilities allowed me to have confidence in myself. Thank you to Dave Shaw, Gabi