Index Catalog // ScholarsArchive@OSU

Habitat relationships of native and non-native fishes of the Willamette River, Oregon

Creator:: Williams, Joshua E.
Abstract:: The Willamette River flows north between the Cascade Mountains and Coast Range of western Oregon within a 29,728-km² basin. The fish community in the geologically young basin consists of 36 native species, but introductions of non-native fishes have added 33 additional species for a total of 69 fish species. During...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Stanley V. Gregory The Willamette River flows north between the Cascade Mountains and

Assessing the Impact of Fishery Bait on Spatiotemporal Variation in the Feeding Ecology of Dungeness Crab (Cancer magister) Using Stable Isotopes, Gut Content Analysis & Fishermen Interviews

Creator:: Harbison, Toby N.
Abstract:: The commercial Dungeness crab (Cancer magister) fishery is Oregon’s largest trap-based fishery. Each year, crab vessels discard millions of pounds of bait, including squid, razor clams, and sardines, into the near-coastal ocean. Although the fishery season typically runs from December 1st through August 14th, most landings occur within the first...
Resource Type:: Masters Thesis
Full Text:: : ___________________________________________________ Sarah K. Henkel The commercial Dungeness crab (Cancer

Surfgrasses (Phyllospadix spp.) as dynamic foundation species for macroinvertebrates along the Oregon coast

Creator:: Moulton, Orissa M.
Abstract:: Foundation species are important components of ecosystems because they provide habitat and ameliorate stressful conditions for residents. This thesis considers the role of surfgrasses (Phyllospadix spp.) as dynamic foundation species on the coast of Oregon in two studies. Chapter 2, which presents an observational survey of two Phyllospadix congeners, investigates...
Resource Type:: Masters Thesis
Full Text:: improving my analyses right away. My Graduate Council Representative, Dr. S. Gregory provided both

Data assimilation for prediction of shallow water flows with uncertain bathymetry

Creator:: Wilson, Gregory W.
Abstract:: A new method is introduced for incorporating bathymetric uncertainty into predictions of nearshore and river flows (i.e., unstratified flows primarily forced by pressure and radiation stress gradients). The method involves the use of the ensemble Kalman filter (EnKF) as a parameter estimation scheme, where the parameter to be estimated is...
Resource Type:: Dissertation
Full Text:: Uncertain Bathymetry AN ABSTRACT OF THE DISSERTATION OF Gregory W. Wilson for the degree of Doctor of

The effects of land use on mineral flat wetland hydrologic processes in lowland agricultural catchments

Creator:: Marshall, Sarah M.
Abstract:: Hydrologic processes within mineral flat wetlands, along with their connections to groundwater and downstream surface water in lowland agricultural catchments are poorly understood, particularly under different land uses. In the three field studies included in this thesis, we examined infiltration, wetland hydroperiod, groundwater recharge dynamics, surface runoff generation, and water...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Sarah M. Marshall for the degree of Doctor of Philosophy in

The roles of nutrient dynamics, oceanography, and light in the structure and functioning of rocky intertidal macrophyte assemblages

Creator:: Close, Sarah L.
Abstract:: The influence of the physical environment on organisms has long been a subject of ecological research. But, the complex drivers of environmental variation, and the multiple scales at which this can occur, make studying this topic a difficult challenge. In rocky intertidal habitats, oceanographic- and climate-scale variability influence benthic communities...
Resource Type:: Dissertation
Full Text:: OF Sarah L. Close for the degree of Doctor of Philosophy in Zoology presented on January 17

Development of innovative applications for passive sampling devices : monitoring bioavailability, risk from exposure and environmental mixture toxicity

Creator:: Allan, Sarah E.
Abstract:: Chemicals must be bioavailable for there to be a potential for exposure and consequent risk to human or environmental health. Passive sampling devices (PSDs) are used to quantify the time-integrated concentration of bioavailable contaminants. We demonstrate that PSDs can be paired with the zebrafish developmental toxicity bioassay to produce site-specific,...
Resource Type:: Dissertation
Full Text:: Microsoft Word - Thesis - Sarah Allan

Survival and persistence of Bacteroidales human and ruminant specific fecal markers and occurrence with fecal pathogens

Creator:: Walters, Sarah P.
Abstract:: Aquatic fecal contamination from non-point sources impairs environmental health and serves as a vehicle for transmission of waterborne disease, resulting in economic losses worldwide. Accurate methods of diagnosing fecal pollution and its source are needed to prevent human exposure, remediate pollution, and reduce economic impacts. In order to obtain this...
Resource Type:: Dissertation
Full Text:: OF THE DISSERTATION OF Sarah P. Walters for the degree of Doctor of Philosophy in

Revegetation with Carex nebrascensis and Carex utriculata following reconstruction in a NE Oregon meadow stream

Creator:: Quistberg, Sarah E.
Abstract:: Riparian vegetation is an essential component for the maintenance and/or repair of channel stability and function. Sedges within low-gradient riparian systems provide the structure necessary for sediment trapping leading to channel narrowing through bank building processes. Planting success in riparian restoration projects has often failed due to inappropriate species selection,...
Resource Type:: Masters Thesis
Full Text:: terrestrial and aquatic ecosystems (Gregory et al AN ABSTRACT OF THE THESIS OF Sarah E. Quistberg for

Analysis of dredge tailings pile patterns : applications for historical archaeological research

Creator:: Purdy, Sarah E.
Abstract:: For centuries humans have been searching for precious metals. The search for gold has greatly changed the landscape of the American West, beginning in the 1850s and continuing today. Various gold rushes around the country created mining colonies in remote areas, thereby connecting the frontier with the rest of America...
Resource Type:: Masters Thesis
Full Text:: Microsoft Word - Sarah Purdy Thesis 3

ScholarsArchive@OSU

Habitat relationships of native and non-native fishes of the Willamette River, Oregon

Assessing the Impact of Fishery Bait on Spatiotemporal Variation in the Feeding Ecology of Dungeness Crab (Cancer magister) Using Stable Isotopes, Gut Content Analysis & Fishermen Interviews

Surfgrasses (Phyllospadix spp.) as dynamic foundation species for macroinvertebrates along the Oregon coast

Data assimilation for prediction of shallow water flows with uncertain bathymetry

The effects of land use on mineral flat wetland hydrologic processes in lowland agricultural catchments

The roles of nutrient dynamics, oceanography, and light in the structure and functioning of rocky intertidal macrophyte assemblages

Development of innovative applications for passive sampling devices : monitoring bioavailability, risk from exposure and environmental mixture toxicity

Survival and persistence of Bacteroidales human and ruminant specific fecal markers and occurrence with fecal pathogens

Revegetation with Carex nebrascensis and Carex utriculata following reconstruction in a NE Oregon meadow stream

Analysis of dredge tailings pile patterns : applications for historical archaeological research

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