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Filtering by: Subject Seed treatment -- Oregon Remove constraint Subject: Seed treatment -- Oregon 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:
    , and averaged over the season for each treatment. End of season seed production wcCs greater than

  • Role of propagule pressure and priority effects on plant establishment during restoration of invaded shrub-steppe

    Creator:
    Schantz, Merilynn C.
    Abstract:
    Biological plant invasions are diminishing the ecological integrity and function of ecosystems worldwide. A primary example of this is in the Great Basin of the United States, where invasive annual grasses, like cheatgrass (Bromus tectorum L.) and medusahead (Taeniatherum caput-medusae L. Nevski), are dominating many sagebrush-steppe ecosystems. In these invaded...
    Resource Type:
    Dissertation
    Full Text:
    ecosystems. Seed dispersal dynamics, including propagule pressure and priority effects, strongly influence