Along with the increased attention in the past two decades on the values of wetlands and the documentation of great losses of wetland acreage has been a growing need for a comprehensive assessment method for analyzing the functions of a wetland. Detailed site-specific study has been the traditional method for...
The two-fold purpose of this study was to identify critically important factors that affect the
meaningful assessment of student learning outcomes and study why they were critically
important. A three-round Delphi process was used in both a pilot project and in a full study to
solicit the opinions of individuals...
Fish passing Winchester Dam view-window counting station on the North Umpqua River were enumerated. Figure 1 is a map of the Umpqua basin and denotes the counting station. The counts for summer steelhead, fall chinook, and sea-run cutthroat increased while those for winter steelhead, spring chinook, and coho decreased. By...
A view-window counting station was operated at the Pacific Power and Light Company's dam on the North Umpqua River at Winchester, Douglas County, Oregon. The fish passing the dam each season were enumerated by species, according to a statistical sampling program established at Oregon State University. The counter recorded the...
Meadowfoam (Limnanthes alba) is a commercial oilseed annual crop
grown in Oregon. After extracting oil from seed, the remaining seed
meal is rich in the secondary plant metabolite glucolimnanthin, which
can be converted into pesticidal compounds such as 3-methoxybenzyl
isothiocyanate (ITC) and 3-methoxyphenylacetonitrile (nitrile) in the
presence of the enzyme...
Meadowfoam (Limnanthes alba L.) is a herbaceous winter spring annual grown as a commercial oilseed crop. The meal remaining after oil extraction from the seed contains up to 4% of the glucosinolate glucolimnanthin. Degradation of glucolimnanthin yields toxic breakdown products, and therefore the meal may have potential in the management...
Fire performs many beneficial ecosystem functions in dry forests and rangelands across much
of North America. In the last century, however, the role of fire has been dramatically altered by numerous
anthropogenic factors acting as root causes of the current fire crisis, including widespread logging, road
building, fire suppression, habitat...
Fire-history reconstructions are based on tree-ring records that span the last few centuries and charcoal data
from lake-sediment cores that extend back several thousand years. The two approaches have unique strengths and
weaknesses in their ability to depict past fire events and fire regimes, and most comparisons of these datasets...