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Filtering by: Creator Voelker, S. Remove constraint Creator: Voelker, S. Committee Member Hailemariam, Temesgen Remove constraint Committee Member: Hailemariam, Temesgen

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  • Canopy Ecology of Swiss Needle Cast in Young and Mature/Old-growth Douglas-fir (Pseudotsuga menziesii)

    Creator:
    Lan, Yung-Hsiang
    Abstract:
    Swiss needle cast (SNC) is a foliage disease of Douglas-fir caused by Nothophaeocryptopus gaeumannii, an Ascomycete fungus (Mycosphaerellaceae) that causes growth reductions in Douglas-fir plantations across the Pacific Northwest. Epidemiology of the fungus is generally well known in plantation trees, but the relationship between disease expression and foliage nutrition and...
    Resource Type:
    Dissertation
    Full Text:
    , needle retention, carbon, and 9 foliage nutrients (N, Na, K, P, Ca, Mg, Mn, Al, and S). Foliage samples

  • Environmental Remote Sensing with Unmanned Aircraft Systems

    Creator:
    Burnett, Jonathan D.
    Abstract:
    Small Unmanned Aircraft Systems (sUASs) equipped with optical sensors are capableof remotely sensing landscapes and wildlife at spatial and temporal resolutions that werepreviously inaccessible due to technical and budgetary limitations. Conventional remotesensing and photogrammetric workflows can be applied to the resulting high resolution imageryto facilitate new types of scientific inquiry....
    Resource Type:
    Dissertation
    Full Text:
    - though one stand was primarily comprised of saplings (S). Species indi- cates the dominant species on

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

    Creator:
    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