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Filtering by: Creator Feindel, Kristin B. Remove constraint Creator: Feindel, Kristin B. Advisor Myrold, David D. Remove constraint Advisor: Myrold, David D. License All rights reserved Remove constraint License: All rights reserved

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  • Contributions of ammonia-oxidizing bacteria and archaea to nitrification in forest soils

    Creator:
    Lu, Xinda
    Abstract:
    Prior to 2005, ammonia oxidation, the first step of nitrification, was thought mediated mainly by ammonia-oxidizing bacteria (AOB). However, the discovery of Thaumarchaeota carrying the genes coding for the ammonia monooxygenase (AMO) enzyme led to the discovery that ammonia-oxidizing archaea (AOA) also contribute to nitrification. Despite the uptick in studies...
    Resource Type:
    Masters Thesis
    Full Text:
    people: Anne Taylor, Andrew Giguere, Kristin Kasschau, Fumiaki Funahashi, Rachel Danielson. I also

  • Ammonia-oxidizer and denitrifier populations in boreal forest soils of differing nitrogen availability

    Creator:
    Burton, Marci S.
    Abstract:
    Nitrification and denitrification are major biological processes transforming nitrogen (N) in soils to plant available N, highly leachable nitrate (NO₃⁻) and gaseous N oxides. Although many studies in the past have studied N cycling communities, the effect of increased N inputs on ammonia-oxidizer and denitrifier population dynamics is still under...
    Resource Type:
    Masters Thesis
    Full Text:
    Halsey for their time and feedback as committee members. A sincere thank-you to Dr. Kristin

  • Diversity and Activity of Microbial Extracellular Peptidases in Soil

    Creator:
    Nguyen, Trang T. H.
    Abstract:
    Soil nitrogen exists largely as organic matter, including plant liter, dead animal matter, and microbial necromass. About 90% of soil organic nitrogen is proteinaceous material that is too large for plants and microorganisms to assimilate directly. Protein depolymerization therefore plays a critical role in mobilizing this organic source of nitrogen,...
    Resource Type:
    Dissertation
    Full Text:
    and become a better science writer. Dr. Kristin Kasschau, my lab manager, always gave me helpful

  • Functional profiles of soil microbial communities in second-growth Douglas-fir forests of the Pacific Northwest

    Creator:
    McGinnis, Megan L.
    Abstract:
    Forests are one of the largest repositories of terrestrial C. Understanding factors that drive organic matter transformations and nutrient efflux from these systems is therefore highly important. Temperate forests are of particular significance due to the large fraction of C that is stored below ground in the soil. Characterizing nutrient...
    Resource Type:
    Masters Thesis
    Full Text:
    Kristin Kasschau for their assistance with various laboratory techniques. Weyerhaeuser Company provided