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Filtering by: Advisor Zobel, Donald Remove constraint Advisor: Zobel, Donald Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • A comparative study of temperate Chamaecyparis forests

    Creator:
    Hawk, Glenn M.
    Abstract:
    The objectives of this study include: (1) analysis of Chamaecyparis lawsoniana, C. taiwanensis, and C. formosensis forests including the structure, composition, and dynamics of plant communities and their environmental relationships; and (2) comparison of the temperate Chamaecyparis forests of Taiwan and the Pacific Northwest with emphasis on structural and successional...
    Resource Type:
    Dissertation
    Full Text:
    TEMPERATE CHAMAECYPARIS FORES2 Abstract approved: Redacted for Privacy Donald(B. del The objectives of

  • Responses of forest understory plants to burial by volcanic tephra from Mount St. Helens, Washington

    Creator:
    Antos, Joseph A.
    Abstract:
    The effects of burial by tephra (volcanic aerial ejecta) on forest understory plants were examined northeast of Mount St. Helens, Washington, in the area where the 18 May 1980 eruption deposited tephra but did not destroy canopy trees. At six sites along a tephra depth gradient from 2-15 cm, understory...
    Resource Type:
    Dissertation
    Full Text:
    , Dr. Donald B. Zobel, for numerous forms of assistance. I appreciate the help received from my

  • Forest structure and regeneration in the Tsuga heterophylla - Abies amabilis transition zone, central Western Cascades, Oregon

    Creator:
    Stewart, Glenn H.
    Abstract:
    The dynamics of stands in the mid-elevation old-growth Douglas-fir (Pseudotsuga menziesii) forests of the central western Oregon Cascade Range were investigated using stand structure analysis. Trees with different growth rates were commonly present in the same stand, which resulted often in a weak correlation between tree diameter and age. Thus,...
    Resource Type:
    Dissertation
    Full Text:
    ACKNOWLEDGEMENTS I wish to thank Drs Jerry Franklin and Donald Zobel for serving ably as my major professors and