Index Catalog // ScholarsArchive@OSU

Evaluating Spatial Patterns of Heavy Metal Levels and Pb Isotopic Compositions of Peat Soils along the Red Dog Mine Haul Road in Northwest Alaska

Creator:: Melby, Kali M.
Abstract:: This study evaluates ore transport and other mining activities on metal levels in the remote Arctic ecosystem of Cape Krusenstern National Monument (CAKR) in northwestern Alaska. This monument is 50 km SW of Red Dog Mine, one of the world’s largest Pb–Zn mines. The Delong Mountain Transportation System (DMTS) haul...
Resource Type:: Masters Thesis
Full Text:: Appendix C. Lead Isotope data

Geochemical Fingerprinting of Metals from Non-Ferrous Smelting Emissions within Lake Sediments

Creator:: Rutila, Elizabeth C.
Abstract:: The research presented in this thesis seeks to further our understanding of the geochemical signatures that can be used to trace and quantify non-ferrous smelting emission inputs into the environment. Strong evidence suggests that emissions from the non-ferrous smelter in Trail, BC are the primary source of metals deposited from...
Resource Type:: Masters Thesis
Full Text:: THESIS OF Elizabeth C. Rutila for the degree of Master of Science in Water Resources Science

Soil organic carbon response to six years of warming : assessing the impacts of altered diurnal temperature range

Creator:: Murphey, Virginia L. W.
Abstract:: There is a growing consensus that anthropogenic warming will impact soil organic matter (SOM). Globally, soil contains 2-3 times more carbon (C) than plants, and like plants, temperature induced change of SOM could have significant climate repercussions. Although, the majority of warming experiments have increased day and night temperatures equally,...
Resource Type:: Masters Thesis
Full Text:: . Devlin Montfort, my graduate council representative, Dr. Julie Pett-Ridge, Dr. Jillian Gregg, and Dr

Phosphorus control of nitrogen fixation

Creator:: Watkins-Brandt, Katie S.
Abstract:: Under conditions of fixed N-limitation, as with most oligotrophic systems, the process of biological N₂ fixation (diazotrophy) is favored, provided the necessary trace elements and vitamins are sufficient. Despite the well understood contributions of N₂ fixation in oligotrophic regions, the nutritional and ecological controls of marine diazotrophs have not been...
Resource Type:: Masters Thesis
Full Text:: for serving as a committee member and an outside view and Dr. Julie Pett-Ridge for serving as my

Lichen Biomonitoring from Valley to Alpine in Central and Southern California

Creator:: Kovasi, Adrienne I.
Abstract:: In the mountains of central and southern California, high elevation wilderness areas lack epiphytic lichens that can be used to inform us about atmospheric deposition in multiple ways. Epiphytic lichens are capable of accumulating elements proportionally to the local atmospheric concentration, establishing them as commonly used biomonitor of key elements....
Resource Type:: Masters Thesis
Full Text:: appreciate Julie Pett-Ridge and Steve Perakis for helping to answer my many questions and serving on my

Calcium Ion Transport via Seeping Flow Events through Epikarst Microfissures

Creator:: Windom, Lisa M.
Abstract:: Solute transport models in karst groundwater must consider variable and complex flow regimes. Within fissures less than 2 mm in aperture, during unsaturated flow events, seeping flow may flow as films or under capillary tension as a capillary rivulet. This project focuses on exploring the mass transport characteristics of seeping...
Resource Type:: Masters Thesis
Full Text:: ............................................................................................ 31 Table 2.7 System constants for water are given for 20°C

Influence of a Sedimentary Source of Nd on Deep Ocean εNd Distributions

Creator:: Abbott, April N.
Abstract:: Ocean circulation is an important component in Earth's climate system. Predicting future climate and circulation changes requires an improved understanding of the past relationship between climate and ocean currents. The neodymium isotope composition (εNd) of water masses is frequently used as a quasi-conservative tracer to reconstruct ocean circulation. The current...
Resource Type:: Dissertation

Predicting the spatial variability in soil properties using DSM across Malheur National Forest

Creator:: Seeno, Elizabeth A.
Abstract:: Soil properties may hold the key to improved predictions of soils during digital soil mapping (DSM), which has developed with a focus on environmental factors external to soil. The spatial variability in soil properties was modeled across Malheur National Forest in eastern Oregon as an approach to improve DSM. The...
Resource Type:: Masters Thesis
Full Text:: Appendix C – Potential map validation techniques

Comparison of radiative feedback variability over multiple time scales in climate model and reanalysis data

Creator:: Dalton, Meghan M.
Abstract:: In a steady state, the Earth's absorbed solar radiation (ASR) balances the outgoing longwave radiation (OLR) at the top of the atmosphere (TOA). In response to a radiative forcing, that is, an external perturbation to the top of the atmosphere energy balance, the Earth's climate system adjusts until reaching a...
Resource Type:: Masters Thesis
Full Text:: help reduce the uncertainty associated with future climate projections. c©Copyright by Meghan M

Advancements in Phytoremediation, Dosimetry, and Environmental Radiological Protection: Integrating Endemic Plants, Anatomically Accurate Phantoms, and Real-world Data for Improved Assessments

Creator:: Hargraves, Joshua T.
Abstract:: The environmental impact of the nuclear industry has prompted the need for innovative remediation strategies and accurate radiological assessments. This paper synthesizes three studies that collectively explore the potential of endemic plant species for phytoremediation, the development of anatomically accurate phantoms for precise dosimetry calculations, and the critical evaluation of...
Resource Type:: Dissertation
Full Text:: the elemental compositions of each, including: C, O, N, H, Cl, K, Mn, Fe, Cu, Zn, Br, Rb, Sr in the

Stream Chemistry in the Oregon Coast Range: Spatial and Temporal Variation

Creator:: Carini, Lya
Abstract:: Hydrological and biogeochemical processes occurring throughout a watershed are typically reflected in stream water chemistry, including in coastal watersheds. While Oregon Coast Range streams have been studied in the past, there is a dearth of knowledge in terms of seasonal temporal trends and spatial variability that this study seeks to...
Resource Type:: Masters Thesis
Full Text:: , 2017; Perakis & Pett-Ridge, 2019). However, only a few studies have examined and reported seasonal

Diversity and Activity of Microbial Extracellular Peptidases in Soil

Creator:: Nguyen, Trang T. H.
Abstract:: Soil nitrogen exists largely as organic matter, including plant liter, dead animal matter, and microbial necromass. About 90% of soil organic nitrogen is proteinaceous material that is too large for plants and microorganisms to assimilate directly. Protein depolymerization therefore plays a critical role in mobilizing this organic source of nitrogen,...
Resource Type:: Dissertation
Full Text:: from my committee members for answering my questions and guiding me along the way, Dr. Julie Pett

The role of near-stream zones on flow, chemistry and isotopic composition at the headwater scale

Creator:: Frentress, Jay
Abstract:: Stream discharge is a key water balance component and important factor in global change evaluations. Nevertheless, the mechanisms for streamflow generation are poorly understood. Near- stream surface saturation during precipitation events is one of the most iconic, visible indicators of rapid runoff production in upland humid catchments around the world....
Resource Type:: Dissertation
Full Text:: upper left – Weierbach, Luxembourg (A); Paroma, Ecuador (B); Aberdeen, UK (C); Sleepers River, Vermont

Disease invasion dynamics : brucellosis and tuberculosis in African buffalo (Syncerus caffer)

Creator:: Gorsich, Erin E.
Abstract:: Emerging infectious diseases in wild animals threaten global biodiversity as well as domestic animal and human health. Their unprecedented increase in conjunction with anthropogenically induced range shifts of endemic pathogens exposes hosts to novel parasite combinations, lending urgency to research on disease dynamics in wildlife systems. In natural populations, hosts...
Resource Type:: Dissertation
Full Text:: thinking. Thank you Julie Pett-Ridge for your support; Dan Rockey for your advice and perspective on

Scaling, ash-driven bistability, and other agents of soilscape genesis discovered while digitally mapping soils of the Blue Mountains, Oregon

Creator:: Almquist, Vance Warner
Abstract:: This dissertation reports on four related, though separate projects. The first project details the process of carrying out a digitally augmented soil mapping (DSM) effort alongside an ongoing survey in Oregon's Ochoco National Forest (ONF) using a Random Forest algorithm. The second chapter describes a initial soil survey in Oregon's...
Resource Type:: Dissertation
Full Text:: Dragila, Eric Kirby, Julie Pett-Ridge, and Rick Colwell for providing me with profound opportunities in

ScholarsArchive@OSU

Evaluating Spatial Patterns of Heavy Metal Levels and Pb Isotopic Compositions of Peat Soils along the Red Dog Mine Haul Road in Northwest Alaska

Geochemical Fingerprinting of Metals from Non-Ferrous Smelting Emissions within Lake Sediments

Soil organic carbon response to six years of warming : assessing the impacts of altered diurnal temperature range

Phosphorus control of nitrogen fixation

Lichen Biomonitoring from Valley to Alpine in Central and Southern California

Calcium Ion Transport via Seeping Flow Events through Epikarst Microfissures

Influence of a Sedimentary Source of Nd on Deep Ocean εNd Distributions

Predicting the spatial variability in soil properties using DSM across Malheur National Forest

Comparison of radiative feedback variability over multiple time scales in climate model and reanalysis data

Advancements in Phytoremediation, Dosimetry, and Environmental Radiological Protection: Integrating Endemic Plants, Anatomically Accurate Phantoms, and Real-world Data for Improved Assessments

Stream Chemistry in the Oregon Coast Range: Spatial and Temporal Variation

Diversity and Activity of Microbial Extracellular Peptidases in Soil

The role of near-stream zones on flow, chemistry and isotopic composition at the headwater scale

Disease invasion dynamics : brucellosis and tuberculosis in African buffalo (Syncerus caffer)

Scaling, ash-driven bistability, and other agents of soilscape genesis discovered while digitally mapping soils of the Blue Mountains, Oregon

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