Search Constraints

Start Over
Filtering by: Subject Soil ecology Remove constraint Subject: Soil ecology Degree Field Environmental Sciences Remove constraint Degree Field: Environmental Sciences

Search Results

  • Biology and chemistry of a meadow-to-forest transition in the Central Oregon Cascades

    Creator:
    Heichen, Rachel S.
    Abstract:
    In this study, biological and chemical characteristics were determined for two high-elevation meadow-to-forest transitions located in the Central Oregon Cascades. The chloroform fumigation incubation method (CFIM) was used to determine microbial biomass C(MBC) and the N flush due to fumigation (NF), and meadow values were compared to forest values for...
    Resource Type:
    Masters Thesis
    Full Text:
    soils. Mean MBC for both sites as determined by CFIM was estimated to be 369 and 406 jig C g' soil in

  • Provenance, lifespan, and phylogeny : testing a conceptual framework for plant community management

    Creator:
    Benfield, Cara D.
    Abstract:
    Successful conservation management requires an understanding of how species respond to intervention. Native and exotic species may respond differently to management interventions due to differences arising directly from their native or exotic origin (i.e., provenance) or from differences in life-history or phylogenetic lineage that are associated with provenance. Thus, selection...
    Resource Type:
    Masters Thesis
    Full Text:
    species distributions along natural gradients of soil chemistry. I analyze data collected in 2005 and

  • Directing ecological succession : the role of competition in restoring semi-arid grasslands dominated by invasive plants

    Creator:
    Mangla, Seema
    Abstract:
    Successful ecosystem restoration requires an understanding of the ecological processes directing succession. One of the challenges in the semi-arid grasslands of western United States is replacement of native species by invasive annual grasses. Solutions to this problem require identifying and manipulating ecological processes that direct succession to favor desired vegetation....
    Resource Type:
    Dissertation
    Full Text:
    .............................................................................................17 2.2.1 Selection of plant species and soil

  • Effects of disturbance modes on mycorrhizal fungus communities at Crater Lake National Park

    Creator:
    Trappe, Matt
    Abstract:
    Crater Lake National Park presents an excellent opportunity for ecological research due to its relatively pristine landscape, the protection of its natural features, its infrastructure, and a Park administration supportive of scientific inquiry and restoration ecology. The research presented here examines the responses of fungi to various forms of perturbation....
    Resource Type:
    Dissertation
    Full Text:
    INTERACTIONS AMONG PRESCRIBED FIRE, SOIL ATTRIBUTES, AND