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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:: 6 commercial growers' fields and two experiment research stations in the Willamette Valley of

The influence of herbivore generated inputs on nutrient cycling and soil processes in a lower montane tropical rain forest of Puerto Rico

Creator:: Fonte, Steven J.
Abstract:: The role of insect herbivores in the nutrient cycling dynamics of forest ecosystems remains poorly understood. Although past research in herbivory has focused primarily on the deleterious effects that insects can have on tree growth and mortality, the overall effects of herbivory are more complex. Herbivores have the potential to...
Resource Type:: Masters Thesis
Full Text:: tropical rain forest near the El Verde Field Station, Luquillo Long-Term Ecological Research (L TER) site

Land surface energy balance and surface soil moisture variation in HAPEX-MOBILHY

Creator:: Nichols, William E.
Abstract:: The HAPEX-MOBILHY regional experiment provided an significant opportunity to analyze the partition of energy and distribution of water over land surfaces. The combination of remotely sensed data and ground instrument networks over the large-scale in situ experiment allowed investigation of spatial and temporal variation of such hydrologic parameters as the...
Resource Type:: Masters Thesis
Full Text:: . Cuenca The HAPEX-MOBILHY regional experiment provided an significant opportunity to analyze the

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

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:: results for competition experiment. Abbreviations: Arm = Armillaria ostoye, Coe = Coenococcum geophillum

From Micro to Macro: Insights into Biogeochemical Mechanisms that Shape Marine Systems

Creator:: Seabrook, Sarah
Abstract:: Biogeochemical mechanisms employed by key organisms, or symbiotic associations of organisms, transform the function and structure of their environment through processes recognized as ecosystem engineering. This dissertation seeks to investigate organism-ecosystem interactions that serve globally significant ecological functions in marine systems and impact how systems respond to environmental change. Using...
Resource Type:: Dissertation
Full Text:: experiment-based methodologies to identify a novel mechanism in coral decline, wherein coral bleaching

Environmental Stressors Influence Fabaceae Seedling Development

Creator:: Gerber, Kaitlin A.
Abstract:: Sites in need of restoration typically have one or more environmental factors that limit seedling establishment; identifying ecophysiological responses to environmental stressors can be advantageous in growing seedlings able to overcome such constraints on survival. To maximize survival after outplanting, seedlings should be grown in a manner that considers both...
Resource Type:: Masters Thesis
Full Text:: focused on black locust and was instrumental in the design of this experiment. Anthony S. Davis assisted

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:: University of Wyoming-National Park Service Research Station for their logistical support, especially Drs

Distinguishing biological and physical controls on soil respiration

Creator:: Phillips, Claire L.
Abstract:: Soil respiration, or the combined CO₂ emissions from roots and soil microorganisms, constitutes one of the largest losses of carbon (C) from terrestrial ecosystems. The major drivers of soil respiration, which include soil moisture, temperature, and substrate quality, have been known for some time. Nevertheless, correlations between these drivers and...
Resource Type:: Dissertation
Full Text:: ....................................................................................................... 97 Experiment 1: Impact of stressful moisture conditions on total soil-respired δ13CO2

Inheritance of stem elongation tendency in determinate forms of Phaseolus vulgaris (L.)

Creator:: Detongnon, Jean
Resource Type:: Dissertation
Full Text:: at the Oregon Agricul- ture Experiment Station. The backcross method of breeding was used to

ScholarsArchive@OSU

Winter cover cropping effects on integrative biological indicators of soil quality

The influence of herbivore generated inputs on nutrient cycling and soil processes in a lower montane tropical rain forest of Puerto Rico

Land surface energy balance and surface soil moisture variation in HAPEX-MOBILHY

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

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

From Micro to Macro: Insights into Biogeochemical Mechanisms that Shape Marine Systems

Environmental Stressors Influence Fabaceae Seedling Development

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

Distinguishing biological and physical controls on soil respiration

Inheritance of stem elongation tendency in determinate forms of Phaseolus vulgaris (L.)

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