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Filtering by: Creator Kawula, Steven P. Remove constraint Creator: Kawula, Steven P. Advisor Perakis, Steven S. Remove constraint Advisor: Perakis, Steven S. File Format application/pdf Remove constraint File Format: application/pdf

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  • Tree species-soils relationships in old-growth forests of the Oregon Coast Range

    Creator:
    Cross, Alison
    Abstract:
    Tree species directly and indirectly affect soil nutrient cycles. I sought to characterize soils and foliage associated with four common canopy tree species (Douglas-fir, western hemlock, western redcedar, and bigleaf maple) in mixed-species old-growth forests of the Oregon Coast Range and to determine whether and how soils differ among the...
    Resource Type:
    Masters Thesis
    Full Text:
    : __________________________________________________________________ Steven S. Perakis Tree species directly and indirectly affect soil nutrient cycles. I

  • Non-linear nitrogen dynamics and calcium depletion along a temperate forest soil nitrogen gradient

    Creator:
    Sinkhorn, Emily R.
    Abstract:
    Understanding how N availability influences base cation stores is critical for long-term ecosystem sustainability. Indices of nitrogen (N) availability and the distribution of nutrients in plant biomass, soil, and soil water were examined across ten young, unpolluted Douglas-fir (Pseudotsuga menziesii) stands in the Oregon Coast Range spanning a three-fold soil...
    Resource Type:
    Masters Thesis
    Full Text:
    : __________________________________________________________________ Steven S. Perakis Understanding how N availability influences base cation stores is

  • Four centuries of soil carbon and nitrogen change after severe fire in a Western Cascades forest landscape

    Creator:
    Giesen, Thomas William
    Abstract:
    Fire is a major disturbance process in many forests. Long-term studies of the biogeochemical effects of fires, especially on soils, are very rare. Consequently, long-term effects of fire on soils are often hypothesized from short-term effects. In a chronosequence study, I studied 24 western Cascades (Oregon) forest stands thought to...
    Resource Type:
    Masters Thesis
    Full Text:
    Severe Fire in a Western Cascades Forest Landscape Abstract approved: Steven S. Perakis