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Filtering by: Subject Forest soils -- Cascade Range Remove constraint Subject: Forest soils -- Cascade Range Committee Member Kleber, Markus Remove constraint Committee Member: Kleber, Markus Decade 2010-2019 Remove constraint Decade: 2010-2019

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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:
    . Franco) at three sites in Oregon (Cascade Head, the H.J. Andrews, and McDonald Forest) that had a soil

  • Calcium-oxalate in sites of contrasting nutrient status in the Coast Range of Oregon

    Creator:
    Dauer, Jenny M.
    Abstract:
    Calcium (Ca) is an essential macronutrient that is increasingly recognized as a biogeochemical factor that influences ecosystem structure and function. Progress in understanding the sustainability of ecosystem Ca supply has been hampered by a lack of information on the various forms and pools of Ca in forest ecosystems. In particular,...
    Resource Type:
    Dissertation
    Full Text:
    , and mineral soil in forest ecosystems, and is a more dynamic component of ecosystem Ca cycling than

  • Interactions between nitrogen, phosphorus, and molybdenum in forest soils and cyanobacterial lichen in the Oregon Coast Range

    Creator:
    Marks, Jade A.
    Abstract:
    Molybdenum is an essential component of biogeochemical cycling, most notably as a component of the nitrogenase enzyme used in biological nitrogen (N) fixation. While the important role of phosphorus (P) in limiting N fixation in ecosystems has been well documented, occurrence and prevalence of molybdenum (Mo) limitation is largely unknown....
    Resource Type:
    Masters Thesis
    Full Text:
    Oregon Coast Range in soil, forest floor litter, and Douglas-fir foliage, and in the cyanolichen