Index Catalog // ScholarsArchive@OSU

VOC Emisions and Categorization in Axenic Growth Conditions by Phaeodactylum tricornutum

Creator:: Thompson, Douglas A.
Abstract:: Volatile organic compounds (VOCs) play an integral role in climate change and as a carbon source for organisms living in a marine environment. These compounds have many sources, but the impacts of biogenically produced VOCs is not fully known. Phaeodactylum tricornutum was studied under axenic ideal growth conditions to determine...
Resource Type:: Undergraduate Thesis
Full Text:: Conditions by Phaeodactylum tricornutum. By Douglas Thompson An Undergraduate

Geographic variation in the seed mycobiome of Coastal Douglas-fir (Pseudotsuga menziesii var. menziesii)

Creator:: Bergmann, Gillian E.
Abstract:: Seeds are an essential component of plant life histories, and seed endophytes have the potential to influence germination, seedling establishment and development. That said, seed endophytes are a relatively new area of study, both in the factors that influence which taxa are present and how these microbes alter plant function....
Resource Type:: Honors College Thesis
Full Text:: Geographic variation in the seed mycobiome of Coastal Douglas-fir

Pathogenicity to western larch (Larix occidentalis) of two fungi, Ophiostoma oseudotsugae and Leptoaraghium abietinum, associated with the douglas-fir beetle (Coleoptera: Scolytidae) in Eastern Oregon, U.S.A.

Creator:: Neal, Tiffany A. and Ross, Darrell W.
Abstract:: Pole-sized, live western larch Larix occidentalis Nutt.) were inoculated with Ophiostoma pseudotsugae(Rumb.) von Arx or Leptographium abietinum (Peck) Wingf., two blue stain fungi associated with the Douglas-fir beetle (Dendroctonous pseudotsugae Hopkins), to assess their pathogenicity. Inoculation with O. pseudotsugae resulted in a significantly greater percentage of necrotic phloem compared to...
Resource Type:: Undergraduate Thesis

Bacterial seed endophytes of Douglas-fir (Pseudotsuga menziesii) and their potential to confer drought tolerance

Creator:: Hatwal, Shikhar
Abstract:: Bacterial endophytes have the potential to confer benefits to Douglas-fir ( Pseudotsuga menziesii ), for instance drought tolerance. Bacterial endophytes originating from seeds are especially important. This is because seed endophytes are more likely to be the first endophytes to get established within the young host plant. The goals of...
Resource Type:: Undergraduate Thesis
Full Text:: Bacterial seed endophytes of Douglas-fir (Pseudotsuga menziesii

Biochar as a cover for dairy manure lagoons: reducing odor and gas emissions while capturing nutrients

Creator:: Dougherty, Brian W.
Abstract:: Liquid manure lagoons are known to be sources of odor and environmentally damaging gas emissions. Land application of the manure slurry after storage can lead to detrimental nutrient runoff and leaching. Floating lagoon covers (biocovers) are one option for reducing emissions, but to date they have only been used to...
Resource Type:: Undergraduate Thesis
Full Text:: Douglas-fir chips under a low oxygen combustion environment at 650°C (FC650), and the other made from

Effects of Contemporary Forest Practices on Stream Nutrients, Temperature, and Periphyton in Small Headwater Streams

Creator:: Pimont, Cedric
Abstract:: Forest harvest practices can impact nutrient concentrations and stream temperatures, altering aquatic ecosystems. To better inform future sustainable forest resource management practices, quantifying the impact of current practices on water quality, particularly in headwater streams is important. In this study, I quantified monthly nitrate-nitrite (N) and orthophosphate (P) concentrations, 7-day...
Resource Type:: Honors College Thesis
Full Text:: significantly between sub-basins, with an average of 0.066 mg/L in WF Tectah compared to 0.607 mg/L in

Carbon isotopes show snowpack acts as a valuable moisture subsidy to mountain forests in the Oregon Cascades

Creator:: Ratcliff, Christopher J.
Abstract:: This study examines climatological influences, particularly that of snowpack, on tree growth and stable carbon isotope discrimination (Δ¹³C) from ~1980 to 2013 at two sites located in the upper reaches of the McKenzie River watershed of the Oregon Cascade Mountains. We tested the use of Δ¹³C values from latewood, corroborated...
Resource Type:: Undergraduate Thesis
Full Text:: , STEVEN L. VOELKER 2, ANNE W. NOLIN 3 1. Department of BioResource Research, Oregon State University

Is Advection Important? An Examination of the Advective Dynamics of Sensible Heat and Their Influence onSubcanopy Carbon Fluxes in Heterogeneous Terrain

Creator:: Carrigg, Sean Stephen
Abstract:: Abstract Understanding small-scale bio-atmospheric interactions is becoming increasingly important as the global climate continues to change at breakneck speed. A theoretical model of the sensible heat budget of a forest is developed combining conservation equations and concepts from fluid dynamics. Budget components are computationally evaluated using micrometeorological data taken during...
Resource Type:: Undergraduate Thesis
Full Text:: a mature Douglas fir (Pseudotsuga men-12 ziesii) forest site in the Coast Range of western Oregon

Stomach Analysis of Top Aquatic Predators in a Headwater Stream Network

Creator:: Ain, Najma
Abstract:: Top predators play important roles in regulating communities and ecosystem processes in freshwater ecosystems. In the headwater stream network, it is crucial to understand the interspecific interaction between multiple predators. In Oregon forested ecosystems, Coastal Giant Salamander (Dicamptodon tenebrosus) and cutthroat trout (Oncorhynchus clarkii) are the top predators in many...
Resource Type:: Undergraduate Thesis
Full Text:: forest, consisting of hemlock, cedar, and Douglas Fir trees, and supports many aquatic

Toxicity and Mutagenicity of Polycyclic Aromatic Hydrocarbons in Contaminated Soils using Mammalian In Vitro Assay

Creator:: Luker, George W.
Abstract:: There exists a growing need to establish a better in vitro model for evaluating PAH toxicity and carcinogenicity and to improve assessments of risk to human health, especially to the complex mixtures that exist in the environment. Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants due to the incomplete combustion...
Resource Type:: Presentation
Full Text:: Hydrocarbons in Contaminated Soils using a Mammalian In Vitro Assay G E O R G E W L U K E R I I I 1 , D R

ScholarsArchive@OSU

VOC Emisions and Categorization in Axenic Growth Conditions by Phaeodactylum tricornutum

Geographic variation in the seed mycobiome of Coastal Douglas-fir (Pseudotsuga menziesii var. menziesii)

Pathogenicity to western larch (Larix occidentalis) of two fungi, Ophiostoma oseudotsugae and Leptoaraghium abietinum, associated with the douglas-fir beetle (Coleoptera: Scolytidae) in Eastern Oregon, U.S.A.

Bacterial seed endophytes of Douglas-fir (Pseudotsuga menziesii) and their potential to confer drought tolerance

Biochar as a cover for dairy manure lagoons: reducing odor and gas emissions while capturing nutrients

Effects of Contemporary Forest Practices on Stream Nutrients, Temperature, and Periphyton in Small Headwater Streams

Carbon isotopes show snowpack acts as a valuable moisture subsidy to mountain forests in the Oregon Cascades

Is Advection Important? An Examination of the Advective Dynamics of Sensible Heat and Their Influence onSubcanopy Carbon Fluxes in Heterogeneous Terrain

Stomach Analysis of Top Aquatic Predators in a Headwater Stream Network

Toxicity and Mutagenicity of Polycyclic Aromatic Hydrocarbons in Contaminated Soils using Mammalian In Vitro Assay

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Conference Name

Creator

Contributor

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