The Tillamook and Kilchis subbasins of the Tillamook Bay watershed (Oregon
Coast Range) have differences in geology and land use history and, therefore, varied
environmental conditions that could affect fish assemblages. Fifty-two randomly
selected wadeable stream reaches in these two subbasins were surveyed for stream habitat
and fish assemblage composition...
With increased resource development on the western Arctic coastal plain of Alaska
(especially within the oil extraction industry) it is important to understand the basic
life history attributes of whitefish stocks in the region in order to ensure appropriate
management. These fish are a crucial part of subsistence harvests for...
Salmonid populations in the Pacific Northwest are at historic lows and many
populations continue to decline. Previous studies have linked salmonid declines to land
use through degradation of in-stream physical habitat, but few of these studies have taken
geology into consideration. This study relates habitat parameters known to be important...
Polycyclic aromatic hydrocarbons (PAH) are common pollutants of aquatic
systems in urban environments. Due to their lipophilicity, persistence, toxicity and
carcinogenicity, they are chemicals of considerable concern. The Portland Harbor
includes a large industrial section with numerous current and historic sources for PAH
contamination. Runoff from a large metropolitan area...
In 1997, the Eskimo Walrus Commission (EWC) and the U.S. Fish and Wildlife Service (USFWS) established a formal cooperative agreement for the conservation and management of Pacific walrus (Odobenus rosmarus divergens). This arrangement facilitates the transfer of funds from Section 119 of the Marine Mammal Protection Act via the USFWS...
The subject of Traditional Ecological Knowledge (TEK) is currently attracting interest from many quarters,
including biologists and philosophers as well as the more traditional mix of anthropologists and other social scientists. Given
rapid contemporary rates of change, as well as the novel species and environments being created by six billion...
Reforestation-based restoration of severely burnt plantations is one of the primary management activities following wildfire on U.S. federal lands. Restoration effects on early-seral plant and cryptogam communities have not been documented. The objectives of this study were, in severely burnt plantations two to four years post-fire, to examine the: (1)...
Determination of the source and fate of natural (higher plant lipids, marine
lipids, etc.) and anthropogenically (e.g., petroleum, coal emissions) derived
hydrocarbons and oxygenated compounds in the environment was accomplished
using gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS)
to characterize or identify molecular biomarkers to be utilized as tracers....
Over the past 42 years clay smoking pipes have been excavated from two U.S. army posts, Fort Hoskins (35BE15) and Fort Yamhill (35PO75) and curated at Oregon State University. These two forts were established in Western Oregon in 1856 and by 1866 both had been decommissioned. Numerous theses have focused...
Sources of polar/water-soluble organic compounds conjunctly with apolar
biomarkers were characterized in natural organic matter. This multi-biomarker
approach was accomplished by a simple analytical method consisting of extraction
with dichloromethane:methanol (2:1, v/v), silylation and analysis by gaschromatography-
mass spectrometry (GC-MS). Polar and apolar biomarkers, derived
mainly from higher plants and...