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Filtering by: Creator Huso, M. Remove constraint Creator: Huso, M. Committee Member Doescher, Paul Remove constraint Committee Member: Doescher, Paul

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  • The effects of defoliation on Bromus tectorum seed production and growth

    Creator:
    Mayer, Kara Hempy
    Abstract:
    Cheatgrass (Bromus tectorum L.) is a widespread exotic weed in the Intermountain sagebrush steppe. An annual grass, it is highly prolific and very competitive with native perennial grass seedlings. A clipping experiment carried out at two cheatgrass-dominated sites (Lincoln Bench and Succor Creek) in eastern Oregon analyzed effects of defoliation...
    Resource Type:
    Masters Thesis
    Full Text:
    design, which included a control with no defoliation. End of season seed production (seeds/m 2), plant

  • Disturbance and dynamics of riparian forests in southwestern Oregon

    Creator:
    Messier, Michael S.
    Abstract:
    Fire exclusion has been associated with structural and compositional changes in many upland forests of the western United States, but little is known about the impacts on riparian forests, portions of the landscape protected for habitat and water quality. For this study, I characterized the historic disturbance and tree recruitment...
    Resource Type:
    Masters Thesis
    Full Text:
    - severity fire within the mixed-severity matrix created large canopy gaps (>30 m in diameter) in which

  • Quaking aspen persistence in three Oregon landscapes

    Creator:
    Seager, S. Trent
    Abstract:
    Quaking aspen (Populus tremuloides) is an important tree species in the western United States and there has been much concern about its persistence. In this thesis, I report on aspen in a portion of its range that has not been previously evaluated: the eastern and western slopes of the Central...
    Resource Type:
    Masters Thesis
    Full Text:
    mixed-effect model (LME) for the split-plot design. Manuela Huso provided statistical support for

  • Persistence of western juniper resource islands following canopy removal

    Creator:
    Miwa, Christopher
    Abstract:
    Western juniper (Juniperus occidentalis) cover has more than doubled within the last century and currently occupies over 9 million acres in the Intermountain West. Encroachment has altered the spatial distribution of soil nutrients and plants in these systems, forming nutrient enriched 'resource islands,' under tree canopies. The purpose of this...
    Resource Type:
    Masters Thesis
    Full Text:
    . - Lisa Ganio and Manuela Huso for helping me to navigate through my statistical analysis, thanks for

  • Effects of wildfire burn severity on soil microbial communitiesand invasive plant species in the Cascade Range of Oregon

    Creator:
    Hebel, Cassie L.
    Abstract:
    Fire suppression in the last several decades has resulted in unprecedented accumulations of organic matter on the landscape, leading to an increase in large, intense wildfires. This study investigated the soil microbial community (using phospholipid fatty acid analysis) across recently burned forests on the eastern slope of the Cascade Range...
    Resource Type:
    Masters Thesis
    Full Text:
    my study design as well as data analysis: Lisa Ganio, Manuela Huso, Greg Brenner and Bruce McCune

  • Plant community recovery after high severity wildfire and post-fire management in the Klamath Region

    Creator:
    Lopez Ortiz, Maria Jose
    Abstract:
    Disturbance and microclimate interact to play a central role influencing the composition and structure of plant communities. In this thesis, I examined plant community composition and structure twenty years after high severity wildfires with and without post-fire management (salvage logging, fuel treatment, tree planting, and shrub release) under contrasting microclimatic...
    Resource Type:
    Masters Thesis
    Full Text:
    beautiful drawings representing the vertical structure of the sites. Manuela Huso helped with

  • Fire severity and vegetation response to fire in riparian areas of the Biscuit and B&B Complex Fires, Oregon

    Creator:
    Halofsky, Jessica E.
    Abstract:
    Fire is the dominant disturbance process in western U.S. forests, and although effects of fire in upland forests are relatively well-studied, there is little information about fire effects on riparian forests, critical areas of the landscape for both habitat and water quality. This dissertation examines different aspects of fire effects...
    Resource Type:
    Dissertation
    Full Text:
    Stephanie Hart for assistance with data collection in the field. Manuela Huso and NaDene Sorensen helped