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  • Cryptogam communities in forest and steppe ecosystems of Oregon, USA

    Creator:
    Root, Heather T.
    Abstract:
    I focus on addressing knowledge gaps relating to management of cryptogams in Oregon's public lands in Pseudotsuga menziesii-Tsuga heterophylla forests on the west side of the Cascade Range and dryland steppe in the Cascade Range's rainshadow. While a great deal of research has illustrated the importance of late-successional forests for...
    Resource Type:
    Dissertation
    Full Text:
    presented on June 9, 2011. Title: Cryptogam Communities in Forest and Steppe Ecosystems of Oregon, USA

  • Predicting the spatial variability in soil properties using DSM across Malheur National Forest

    Creator:
    Seeno, Elizabeth A.
    Abstract:
    Soil properties may hold the key to improved predictions of soils during digital soil mapping (DSM), which has developed with a focus on environmental factors external to soil. The spatial variability in soil properties was modeled across Malheur National Forest in eastern Oregon as an approach to improve DSM. The...
    Resource Type:
    Masters Thesis
    Full Text:
    modeling process. The algorithm of Breiman (2001), Random Forest, creates a large number of decision

  • The land-water interface : patterns of riparian vegetation and channel morphology in the Oregon Coast Range system

    Creator:
    Takahashi, Mayumi
    Abstract:
    This study was conducted to describe variation of riparian vegetation in an Oregon Coast Range system according to geomorphic characteristics and in relation to streamflow. Specific objectives of this study were to: I) examine if the vegetation composition and structure of the riparian forest varied among channel-reach morphologies, 2) examine...
    Resource Type:
    Masters Thesis
    Full Text:
    degree of Master of Science in Forest Resources presented on July 17, 2003. Title: The Land-Water

  • 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:
    interest in many activities including forest management, urban planning, natural resource modeling, ice

  • Vegetation and soil microbial communities three years after wildfire in spruce-fir forests of northwestern Wyoming

    Creator:
    Hooke, Jennifer Suzanne
    Abstract:
    The Normalized Burn Ratio and Composite Burn Index were used to classify burn severity in three sites that experienced lightning-ignited wildfire in the year 2000. The effect of burn severity (unburned, low, moderate, and high severity classes) was investigated on vegetation and soil microbial community composition. Vegetation communities showed a...
    Resource Type:
    Masters Thesis
    Full Text:
    the degree of Master of Science in Forest Science presented on March 16, 2005. Title: Vegetation

  • Error propagation in estimating aboveground biomass using terrestrial LiDAR

    Creator:
    Shettles, Michael A.
    Abstract:
    Broad-scale estimates of above ground forest biomass (AGB) are typically produced by applying individual-tree equations to inventory data consisting of measurements from probabilistically or purposively selected trees. The associated uncertainty for these estimates depends primarily on three sources of error that interact and propagate: (1) measurement error, the quality of...
    Resource Type:
    Masters Thesis
    Full Text:
    preparatory materials for the FOR 525-Forest Modeling class months in advance. Finally, profound thanks to

  • Spatiotemporal Associations of Abundance and Vital Rates of Co-occurring Small Mammals in a Late Successional Forest

    Creator:
    Weldy, Matthew J.
    Abstract:
    Informed conservation of small mammals, ecosystems, and predators requires a detailed understanding of how small mammals species and communities vary in both space and time, as well as the relative cyclicity and synchrony of this variation. This variation can be especially informative to land managers interested in manipulating the abundance...
    Resource Type:
    Masters Thesis
    Full Text:
    -occurring Small Mammals in a Late Successional Forest. Abstract approved

  • Assessing Mechanisms of Douglas-fir Growth Response to Operational Nitrogen Fertilization in Western Oregon

    Creator:
    Putney, Jacob D.
    Abstract:
    Nitrogen (N) fertilizer is a commonly applied silvicultural treatment in intensively managed Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] plantations. When attempting to maximize average growth responses through fertilization, landowners experience difficulty prioritizing stands for treatment based on the likely magnitude of response and return on the operational investment. Field trials were...
    Resource Type:
    Masters Thesis
    Full Text:
    . Putney for the degree of Master of Science in Sustainable Forest Management presented on May 31, 2019

  • Aquatic food web responses to patchy shading along forested headwater streams

    Creator:
    Heaston, Emily
    Abstract:
    In small forested streams, changes in age and structure of riparian vegetation covering the stream have been shown to directly influence the amount of light reaching the stream benthos. Light has the potential to impact in-stream resources that support secondary production through constraints on primary productivity. The influence of landscape...
    Resource Type:
    Masters Thesis
    Full Text:
    degree of Master of Science in Forest Ecosystems and Society presented on August 9, 2017. Title

  • Drivers of Soil Fungal Communities Across Three Tropical Rainforests in Panama

    Creator:
    Schappe, Tyler
    Abstract:
    Fungi play critical roles in ecosystem processes and interact with plant communities in mutualistic, pathogenic, and commensal ways. Fungal communities are thought to be influenced by both associated tree communities and soil properties. However, the relative importance of the biotic and abiotic drivers of soil fungal community structure and diversity...
    Resource Type:
    Masters Thesis
    Full Text:
    ). Soil pH and moisture were common drivers of fungal communities of all guilds among forest sites