Index Catalog // ScholarsArchive@OSU

Physical Modeling of the Feedbacks Between a Reed Canarygrass (Phalaris arundinacea) Patch, Hydraulics, and Bedform Evolution

Creator:: Elliott, Susan H.
Abstract:: Reed Canarygrass (RCG) is an aggressive invader in aquatic ecosystems that swiftly modifies the environment and decreases biodiversity. A physical model was used to investigate the mechanisms by which RCG spreads. Experimental trials were implemented to examine feedbacks between a mid-channel patch of the flexible RCG, hydraulics, and bedform evolution...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Susan H. Elliott for the degree of Master of Science in Water

Winter cover cropping effects on integrative biological indicators of soil quality

Creator:: Ndiaye, Evelyne L.
Abstract:: Responses of biological indicators of soil quality to winter cover cropping were measured on soil samples collected from 6 commercial growers' fields and two experiment research stations in the Willamette Valley of Oregon. The research stations were the North Willamette Research and Extension Center (Aurora, OR), and the Oregon State...
Resource Type:: Masters Thesis
Full Text:: indicators of soil quality AN ABSTRACT OF THE THESIS OF Evelyne L. Ndiaye for the degree of Master of

Patterns of carbon storage within a mature northern highbush blueberry production system

Creator:: Nemeth, Denise Alexandra
Abstract:: The objectives of this study were to: 1) determine how organic matter (incorporated vs. surface mulch) and nitrogen fertilization rate impact northern highbush blueberry (Vaccinium corymbosum L.) plant biomass, carbon accumulation, plant losses and allocation, and mycorrhizal infection in mature plants, and 2) determine the magnitude of carbon fluxes (carbon...
Resource Type:: Dissertation
Full Text:: (Vaccinium corymbosum L.) plant biomass, carbon accumulation, plant losses and allocation, and mycorrhizal

Seasonality as a driving factor of decomposition pathways in both meadows and forests : an exploration across a gradient of climate in Oregon

Creator:: Colby, Samantha E.
Abstract:: Soil food webs process the majority of terrestrial carbon, and influence overall ecosystem function. A primary distinction among soil food webs is based on fungal versus bacterial pathways of decomposition; these lead to fundamentally different soil function, and are expected to differ in dominance between meadows and forests. This assumption...
Resource Type:: Masters Thesis
Full Text:: a likely loss of that nitrogen through leaching (Brussaard et al., 1988; Elliott and Coleman, 1988

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Creator:: Bandick, Anna Katrina
Resource Type:: Masters Thesis
Full Text:: three winter vegetative management treatments: (1) cereal rye cover crop (Seca le cereale L. var

Prescribed fire in Eastern Oregon ponderosa pine forests : relationships between soil fertility and ecology

Creator:: Grossmann, Emilie B.
Abstract:: I conducted two separate studies, both related to the impacts of spring and fall prescribed fire on ponderosa pine (Pinus ponderosa Dougl. ex Loud.) forest soils in Eastern Oregon. The studies were either conducted at or linked to four stands of ponderosa pine, in the Malheur National Forest. Each stand...
Resource Type:: Masters Thesis
Full Text:: soil food web from Elliott et al. (1988). 28 5. Feeding preference dish setup. Wells # 1-8 each

N processing in grass seed crops differing in soil drainage and disturbance in western Oregon, U.S.A.

Creator:: Nelson, Machelle A.
Abstract:: A better understanding of grass seed crop and soil fertility is necessary to improve fertilizer practices and preserving water quality in Willamette Valley, Oregon, where 55% of land-use is in grass seed production that directly impacts adjacent waterways containing native protected fish species. I determined tillage effects on soil N...
Resource Type:: Masters Thesis
Full Text:: fescue (Festuca rubra L. cv. Bridgeport) above ground biomass accumulation during the 1999-2000 and 2000

Heteroaggregation between citrate-stabilized gold nanoparticles and hematite colloids : mechanisms and quantification of nanoparticle-colloid interactions

Creator:: Smith, Brian M.
Abstract:: Understanding the aggregation behavior of engineered nanomaterials (ENMs) in aqueous environments is essential to understanding their fate, transport, and toxicity. Because naturally occurring colloids will likely be present at much higher concentrations than ENMs in environmental systems, heteroaggregation and attachment with these natural colloids could significantly influence ENM fate and...
Resource Type:: Masters Thesis
Full Text:: Elliott from the University of Oregon and lab mates Justin Provolt and Brian Rowbotham were invaluable

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Creator:: Schutter, Mary E.
Abstract:: The Oregon Long-Term Soil Quality Project was initiated to identify soil properties that respond rapidly to alternative management practices. Such practices included winter cover cropping, which was implemented at two experimental research stations and several grower fields throughout the Willamette Valley. The goal of this thesis was to identify the...
Resource Type:: Dissertation
Full Text:: . 29:75-89. Garland, J. L. 1996. Patterns of potential C source utilization by rhizosphere communities

Vegetation and soil microbial communities three years after wildfire in spruce-fir forests of northwestern Wyoming

Creator:: Hooke, Jennifer Suzanne
Abstract:: The Normalized Burn Ratio and Composite Burn Index were used to classify burn severity in three sites that experienced lightning-ignited wildfire in the year 2000. The effect of burn severity (unburned, low, moderate, and high severity classes) was investigated on vegetation and soil microbial community composition. Vegetation communities showed a...
Resource Type:: Masters Thesis
Full Text:: ; Halpern and Spies 1995; Turner et al. 1997; Doyle et al. 1998; Elliott et al. 1999; Keeley et al. 2003

ScholarsArchive@OSU

Physical Modeling of the Feedbacks Between a Reed Canarygrass (Phalaris arundinacea) Patch, Hydraulics, and Bedform Evolution

Winter cover cropping effects on integrative biological indicators of soil quality

Patterns of carbon storage within a mature northern highbush blueberry production system

Seasonality as a driving factor of decomposition pathways in both meadows and forests : an exploration across a gradient of climate in Oregon

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Prescribed fire in Eastern Oregon ponderosa pine forests : relationships between soil fertility and ecology

N processing in grass seed crops differing in soil drainage and disturbance in western Oregon, U.S.A.

Heteroaggregation between citrate-stabilized gold nanoparticles and hematite colloids : mechanisms and quantification of nanoparticle-colloid interactions

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Vegetation and soil microbial communities three years after wildfire in spruce-fir forests of northwestern Wyoming

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search