Search Constraints

Start Over
Filtering by: Creator Rinaldi, Nicole A. Remove constraint Creator: Rinaldi, Nicole A. Contributor advisor sim Pyke, David A. Remove constraint Contributor advisor sim: Pyke, David A.

Search Results

  • Yield responses of invasive grasses to carbon doses

    Creator:
    Brunson, Jessi L.
    Abstract:
    The sagebrush steppe ecosystem of the northern Great Basin is severely degraded and continues to decline due in large part to the invasive, non-native annual grasses Bromus tectorum L. (cheatgrass) and Taeniatherum caput-medusae (L.) Nevski (medusahead). Restoration of invasive-dominated areas is difficult, but can be enhanced by adding a carbon...
    Resource Type:
    Masters Thesis
    Full Text:
    : David A. Pyke Patricia S. Muir The sagebrush steppe ecosystem of the northern Great Basin is

  • Seed and seedling ecology of Artemisia tridentata in a restoration context

    Creator:
    Wijayratne, Upekala C.
    Abstract:
    The semi-arid sagebrush steppe ecosystem is one of the largest biomes in North America. The steppe provides critical habitat and forage for wildlife and is economically important to recreation and livestock industries. However, the ecosystem is threatened primarily due to several negative effects associated with expansion of the exotic annual...
    Resource Type:
    Dissertation
    Full Text:
    of Artemisia tridentata in a Restoration Context Abstract approved

  • Climate-growth relationships of western juniper and ponderosa pine at the pine-woodland ecotone in southern Oregon

    Creator:
    Knutson, Kevin C.
    Abstract:
    Pinyon-juniper woodlands throughout the western U.S. have expanded rapidly following European settlement during the late 19th century. In central and eastern Oregon, western juniper (Juniperus occidentalis var. occidentalis Hook.) encroachment has been previously documented in the sagebrush steppe and upper elevation aspen communities. While these vegetation changes and dynamics have...
    Resource Type:
    Masters Thesis
    Full Text:
    maintaining a positive workplace. Nicole DeCrappeo and Scott Shaff both helped to secure supplies for the

  • Tackifier Type and Concentration have Varying Impacts on Growth of Dryland Mosses

    Creator:
    Blankenship, Wyatt D.
    Abstract:
    There is growing interest in using biocrusts (assemblages of cyanobacteria, lichens, mosses, and other taxa in various proportions covering the upper few millimeters of the soil surface) to assist in restoring ecosystem function and native plant communities in dryland ecosystems. Biocrusts can be transplanted and established using jute or thatch,...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: ______________________________________________________ David A. Pyke Bruce

  • Litter decay processes and soil nitrogen availability in native and cheatgrass-dominated arid rangelands

    Creator:
    Harrison, Kristen S.
    Abstract:
    As large-scale restorations of degraded rangelands are initiated, land managers need to understand how decades of dominance by the invasive annual grass, cheatgrass (Bromus tectorum L.), have altered ecosystem processes. One way to assess such alterations is by observing differences in decay rates, since decomposition is determined by factors such...
    Resource Type:
    Masters Thesis
    Full Text:
    approved David A. Pyke Kate Lajtha As large-scale restorations of degraded rangelands are initiated, land

  • 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:
    approved: 7 i/ David A, Pyke and Mark V. Wilson Cheatgrass (Bromus tectorum L.) is a widespread exotic

  • Sugar application and nitrogen pools in Wyoming big sagebrush communities and exotic annual grasslands

    Creator:
    Witwicki, Dana L.
    Abstract:
    Within A rtemisia tridentata ssp. wyomingensis Nutt. (Wyoming big sagebrush) communities of the Great Basin, lands dominated by the exotic annual grass Bromus tectorum L. (cheatgrass) are increasing at an alarming rate. Carbon applications, which reduce plant-available soil N, have been suggested as a way to give native vegetation a...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Signature redacted for privacy. Signature redacted for privacy. Paul S. Doescher David A

  • Establishment tolerance of six native sagebrush steppe species to imazapic (PLATEAU®) herbicide implications for restoration and recovery

    Creator:
    Bekedam, Steven
    Abstract:
    Scientists and land managers realize that integrated weed management (IWM) strategies are needed to attain successful and lasting improvements of weed infested landscapes. At this time no broadly reliable and environmentally safe IWM strategy has been developed to control exotic annual grasses that dominate many ecosystems of the northern Great...
    Resource Type:
    Masters Thesis
    Full Text:
    , Nicole, and Joe. I owe you three a heap of gratitude. I thank my parents Shirley Rainwater and Don

  • Drivers of plant community dynamics in sagebrush steppe ecosystems : cattle grazing, heat and water stress

    Creator:
    Reisner, Michael D.
    Abstract:
    Sagebrush steppe ecosystems are one of the most widespread but endangered ecosystems in North America. A diverse array of human-related stressors has gradually compromised these ecosystems' resilience to disturbance and invasion by Bromus tectorum (cheatgrass). The role of the foundational shrub Artemisia as a driver of herbaceous community structure and...
    Resource Type:
    Dissertation
    Full Text:
    : _____________________________________________________________________ Paul S. Doescher David A. Pyke Sagebrush steppe ecosystems are one of the most