This study examines stream channel erosion processes in a small urbanizing watershed influenced by deposits of the Columbia Basin catastrophic floods: Kelley Creek, a 12-km² tributary of Johnson Creek, located just east of Portland, Oregon. Information on landscape history, stream channels, and sediment dynamics was compiled. The effects of future...
Worldwide, networks of plants and pollinators are faced with the threat of climate change. The extent of this threat and the degree of adaptability is not yet understood. In Oregon, climate change is predicted to bring hotter and drier summers which may have consequences for pollinators and the resources they...
Spatial variation in the diet of the northern spotted owl (Strix occidentalis caurina) influences owl home ranges, and understanding this relationship will aid managers in forest management prescriptions that influence spotted owl recovery. This study describes the spatial variation in owl diet based on 4183 prey collected at 114 owl...
This study examined patterns and controls on 35-years of forest succession following logging in the 236 ha South Umpqua Experimental Forest within the Umpqua National Forest in southwestern Oregon. Prior to logging, the overstory in all three watersheds (~50% cover) was composed of Douglas-fir (30-40% cover), grand fir (2 to...
Montane meadows in the Cascade Range of Oregon have been declining due to tree establishment since records began. Montane meadow complexes in the H.J. Andrews Experimental Forest shrank by 60 to 75% from 1949 to 2005, but fine scale temporal and spatial processes of tree establishment in these meadows are...
Humans have long suffered the effects of disease causing biological agents. Today bioterrorism appears to be on the rise while at the same time global and ecological changes have resulted in the emergence of new diseases. Potential repercussions of an epidemic pose immense challenges requiring a methodical approach to align...
Solar energy systems purchased in the United States have increased tenfold since 2010. As solar photovoltaics (PV) markets expand, solar energy becomes more affordable. In the last five years, the price of solar has decreased by 40 percent. Despite solar PV becoming more affordable and rising consumer demand, between 50...
An intramolecular variant of the modified-Julia olefination was demonstrated by the synthesis of α,β-unsaturated lactones in a mild and (Z)-selective fashion. The lynchpin reagent (benzothiazol-2-sulfonyl) acetic acid was synthesized in a straightforward fashion in 86% overall yield from commercially available 2-mercaptobenzothiazole via conversion to ethyl (benzothiazol-2-ylthio)acetate by base mediated alkylation...
The recent demand for wireless transceivers has created a flurry of research into nontraditional
receiver architectures. The homodyne receiver, because of its high degree of
integration, low complexity and low power consumption, has surfaced a desirable alternative
to the well-known heterodyne receiver. However, distortions such as gain and phase
imbalance...
Current human – ocean relationships are dominated by unsustainable extraction of marine resources having both ecological and socio-economic consequences. Sustainable fishery management utilizing stakeholder collaboration must become a proactive strategy to prevent or reduce further long-lasting impacts. In Oregon, USA, a newly developing fishery for gooseneck barnacle (Pollicipes polymerus) presents...