This study analyzes past forest fire behavior on a selected area
in the Oregon Cascades in an attempt to evaluate level of fire hazard
on selected vegetational areas. Vegetational areas were defined in
five broad classes: Merchantable Douglas-fir Stands, Non-merchantable
Douglas-fir Stands, Oak- Madrone Stands, Non- forest
Lands, and Non-stocked...
The Chlamydiaceae are a family of obligate intracellular bacteria with a unique biphasic developmental cycle. The replicating, metabolically active, intracellular phase bacteria (RBs) grow within a cellular vacuole know as the inclusion. Since the proteins the Chlamydiaceae secrete into this membrane are the means of host/parasite interaction, they have long...
Quantifying labile phosphorus (P) pools in biosolids is needed to manage biosolids for both agronomic and environmental purposes. Phosphorus indices originated in an effort to protect surface water quality from-non-point-agricultural P inputs. The objectives of this research were to: (1) evaluate soil test components of the western Oregon P index...
Ralph Ellison died without ever completing his second novel. After his death, the executor of his literary estate, John F. Callahan, edited Ellison's work into a novel published under the title Juneteenth. This thesis examines the problems posed by Ellison's posthumously released text, especially the issues of authorial intent and...
Douglas-fir [Pseudotsuga menziesii (Mirbel) Franco] bark (DFB),
sphagnum peat moss, and pumice are the most common substrate components used
in the Oregon nursery industry. Despite the widespread use of these three
components, little information is available on the effect of physical and hydraulic
properties of peat moss and pumice on...
Ammonia (NH₃) volatilization and loss from nitrogen (N) fertilizer in agriculture negatively impacts crops, farm profitability, human health and surrounding ecosystems where it is deposited. A significant source of NH₃ volatilization occurs from surface application of urea on sandy soils with low pH buffering capacity such as those in the...
Forest composition in Paraguay has been in a state of change for the past half century due to land management practices, forest fragmentation, and deforestation for agriculture. How these factors affect dendrological diversity and wood anatomy in Paraguay is not well understood. This thesis documents Paraguayan forest composition on the...
High severity fire is a historical and integral disturbance process in coniferous
forest types. Compounded disturbances such as multiple fires or post-disturbance
management activities are increasingly common, but ecological responses are not well
understood and may represent novel types of disturbances. I studied bird and small
mammal communities in the...
