Native America tribes and community members throughout Oregon have asserted a strong opposition to the fossil fuel industry’s attempt to expand railways, build pipelines, and construct refineries, holding facilities, and export terminals. Despite the limited presence of fossil fuel infrastructure in the state, however, the industry is actively pursuing permits...
Purposeful introductions of exotic species for rehabilitation efforts following wildfire are common on rangelands in the western U.S., though potential ecological impacts of introduced species in novel environments are often poorly understood. One such introduced species, Kochia prostrata (L.) Schrad (forage kochia) has been seeded on over 200,000 ha throughout...
This thesis examines factors limiting understory herb presence and flowering in young second-growth Douglas-fir (Pseudotsuga menziesii) forests on the west side of the Cascade Mountains, Oregon, USA. I studied the belowground effects of canopy trees on understory herbs and shrubs in old-growth forests using trenched plots from which tree roots...
The gastrula of the sea urchin Strongylocentrotus purpuratus
was dissociated into single cells. In culture these cells appeared
apolar, but reassembled into quasi-normal embryos composed of
structures with polarized cells. In this study emphasis was placed on
those morphological events coincident with the reestablishment of a
polar orientation within the...
Fuels management on Bureau of Land Management lands in SW Oregon, USA, is motivated by the needs to reduce fire hazard and restore ecosystems thought to be impacted by fire suppression. Chaparral is one of the most characteristic vegetation communities of SW Oregon's interior valleys, and extensive acreages within this...
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Patricia S. Muir
Fuels management on Bureau of Land Management lands in SW Oregon, USA
Ultrastructural analysis and chemical inhibition studies were
carried out on first cleavage of Mytilus zygotes to determine possible
relationships between the mitotic apparatus and the cortex during
polar lobe formation.
The stages of mitosis correlated with the appearance of the
polar lobe were first determined by light microscopy. The polar...
Surveys of both patients and health care providers have indicated strong interest, up to 95%, in favor of advance directives, which are legal documents that express patients' healthcare treatment decisions. Despite the widespread support for advance directives, actual completion rates are very low, ranging from 4% to 20% for the...
Mule deer (Odocoileus hemionus hemionus) and Rocky Mountain elk (Cervus canadensis nelsoni; hereafter elk) populations in northeast Oregon have declined in the past 10 to 20 years. Concurrent with these declines, cougar (Puma concolor) populations have apparently increased, leading to speculation that predation by cougars may be responsible for declining...
The use of cover crops in young vineyards is not widely accepted in the Pacific Northwest due to concerns of water and nutrient competition between the cover crop and vines. The last 2 years of a 4-year study started in 2009 are reported here. The study evaluated the use of...
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Patricia A. Skinkis
The use of cover crops in young vineyards is not widely accepted in the
Brachypodium sylvaticum (Huds.) Beauv. is an invasive grass that can be found in forest
and prairie communities throughout the Willamette Valley, Oregon. It can out-compete
native species of grasses and forbs and become dominant in a broad range of habitats.
This study investigated if there were differences in vegetation structure...