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Patterns Of Post-Fire Aspen Seedling Establishment, Growth, And Mortality In The Western United States, Mark Regier Kreider

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sexual seedling establishment in aspen is increasingly recognized as an important natural regeneration pathway for the species in the western U.S. However, information on seedling abundance as well as factors influencing aspen sexual regeneration is limited and frequently anecdotal, due to historical assumptions of seedling rarity as well as difficulty identifying sexual seedlings from asexual aspen sucker regeneration. This thesis contributes to the field of aspen seedling ecology in three major ways. Chapter 1 utilizes historical aspen seedling occurrences in the western U.S. and a systematic field survey of 2018 fire footprints to explore patterns and test assumptions of aspen …

Investigation Of Methionine And Lysine Derivatives As A Source Of Rumen-Protected Amino Acids For Lactating Dairy Cows, Mark Avila Fagundes

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cows have a protein requirement for growth, maintenance, and lactation. In order to meet those protein requirements, dairy farmers can supplement or feed cattle with specific amino acids, the building blocks that make-up protein. However, in order for the amino acid product to be effective it must avoid degradation in the rumen and be delivered in the small intestine for absorption. Lysine and methionine have traditionally been recognized as the most limiting amino acids for lactating dairy cows. Therefore, nutrition companies have focused on finding ways to encapsulate or protect lysine and methionine from rumen microbes. The N-acetyl-L-methionine and N-acetyl-L-lysine …

The Fate And Cycling Of Nitrogen, Phosphorous, And Trace Heavy Metals In Beaver-Altered Headwater Streams, Desneiges S. Murray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Human land-use can increase the amount of non-point source (NPS) pollution in a stream, negatively affecting ecosystem health and beneficial services provided by an ecosystem. Unfortunately, NPS pollution remains high in many waterbodies. Beaver dams may be a passive, cost-effective strategy for removing NPS pollution in headwater streams because beaver dams slow stream flow and collect sediments. Impounded sediments can change how nutrients and pollutants are cycled in a stream through multiple pathways. In the first part of our study, we investigated whether beaver activity can reduce nitrogen, phosphorous and heavy metals from otherwise traveling downstream. Results suggest beaver ponds …

Development Of A Two-Level Warping Algorithm And Its Application To Speech Signal Processing, Al-Waled H. Al-Dulaimi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In many different fields there are signals that need to be aligned or “warped” in order to measure the similarity between them. When two time signals are compared, or when a pattern is sought in a larger stream of data, it may be necessary to warp one of the signals in a nonlinear way by compressing or stretching it to fit the other. Simple point-to-point comparison may give inadequate results, because one part of the signal might be comparing different relative parts of the other signal/pattern. Such cases need some sort of alignment todo the comparison. Dynamic Time Warping ( …

Fatty Acid Composition Of Forages And Their Effect On The Fatty Acid Composition In Beef Cattle, Britney G. Allen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study focused on how diet changes the rumen microbiome in the cattle and the effects of that on the long chain fatty acids (LCFA) by microbes in the rumen, and on the short chain fatty acids (SCFA) these microbes produce from feed carbohydrates like fiber and starch. The abundance of bacteria belonging to the phyla Tenericutes and Proteobacteria increased in response to high-fiber or high-starch diets, respectively. The production of two SCFA was positively correlated with the presence of increased Tenericutes (acetate) and Proteobacteria (propionate). A greater acetate to propionate ratio is associated with elevated production of enteric methane …

Bighorn Sheep Demographics Following Pneumonia Die-Off Events, Kylie Sinclair

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bighorn sheep populations across the Intermountain West are subject to disease pressure from the respiratory bacteria Mycoplasma ovipneumoniae. Although the effects of M. ovipneumoniae-associated disease die-offs are well documented, less is known about the factors driving long-term differences in post-die-off population responses. While many herds experience years to decades in which recruitment is less than 20 lambs per 100 ewes, some herds’ lamb survival rates are able to rebound rapidly following die-off events. The reason why these herds recover quickly while others do not is currently unknown. Here, we assess the roles environmental, demographic, and pathogen-associated factors could …

Biomethanation And Alkaline Wet Air Oxidation Of Water Hyacinth (Pontederia Crassipes) From Ozama River, Dominican Republic, Yessica A. Castro

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Obtaining valuable products from environmental remediation waste is a sustainable approach that contributes to the ecological well-being of developing countries. In the present work, the feasibility of the water hyacinth anaerobic digestion as a post-weed management practice in the Ozama River (Dominican Republic) was demonstrated. The estimated energy required for harvesting was lower than that produced during digestion. The biomethanation of water hyacinth was improved by Alkaline Wet Air Oxidation (AWAO), a thermochemical pretreatment process that almost doubled the methane production rate and increased the yield by 24% when conducted at high temperatures. At lower temperatures, the methane yield of …

Effect Of Dietary Short And Medium Chain Fatty Acids In Murine Lethal Sepsis Model, David Son Dang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sepsis is defined as the presence of an infection in combination with systemic inflammation in a host. One of the detrimental results of sepsis is multiple organ failure which eventually leads to death. Lipopolysaccharide (LPS), an endotoxin that can be found on the outer surface of gram-negative bacteria, can be used as a model for sepsis. LPS present in the circulatory system of hosts can induce symptoms that are seen in patients during septicemia.

Previous studies have suggested that including milk fat in a diet may protect against a lethal dosage of LPS in rodents. Milk fat has a unique …

Characterizing Oligomeric State Changes Of Protein Arginine Methyltransferase 1 As A Mechanism For Regulating Activity, Ariana N. Ortolano

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

If you imagined a living cell as a factory, enzymes would be the workers with each individually performing a very specific and important job. If a job is not done correctly it could be detrimental to the performance of assembly lines and devastate a businesses’ existence. For enzymes, their jobs occur on a biological level by catalyzing reactions inside the cell, which can include altering another protein and the pathway it is involved in. Protein arginine methyltransferases, or PRMTs, is an example of an enzyme that modifies protein substrates. It does this by adding one or two methyl groups onto …

"He Beheld The Prince Of Darkness": Joseph Smith And Diabolism In Early Mormonism 1815-1831, Steven R. Hepworth

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Joseph Smith published his first known recorded history in the preface to the 1830 edition of the Book of Mormon. In it, he recounted the loss of the earliest portions of the book’s manuscript due to theft in a scheme the future prophet believed was concocted by the devil. Smith claimed to receive a revelation that instructed him on how to overcome the diabolic plot meant to discredit and destroy the Book of Mormon. This was not Smith’s first or last recorded encounter with the devil. He believed the devil was real and that he was engaged in a cosmic …

Socioscientific Issues In School-Based Agricultural Education: Describing And Exploring Factors Of Integration, Michelle S. Burrows

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Socioscientific issues (SSI) are complex issues which are scientific in nature and have societal impacts. Many SSI have connections to agriculture and as such should be included in agricultural education curriculum. A clear understanding of what school-based agricultural education (SBAE) teachers know about SSI is needed. The purpose of this research was to explore the knowledge and integration of SSI among SBAE teachers by describing and explaining the factors that influence integration. This quantitative survey research was guided by the SSI-based instruction framework and the three-component model of agricultural education. The population for this study was all SBAE teachers in …

Monitoring Populations And Movement Of Bobcats (Lynx Rufus) On The Eastern Slope Of The Sierra Nevada Mountains Of California, Michael Brown

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Monitoring the spatial ecology and population densities of carnivores is critical for effective management and conservation of these populations and the ecosystems in which they exist. However, effective monitoring of carnivore populations through estimates of space use, habitat selection and densities can be difficult due to their relatively low densities and wide ranging, elusive behaviors. Bobcats (Lynx rufus) are medium sized, top-level predators which are widely distributed across North America. Quantifying space use, habitat selection and developing effective population monitoring strategies for this species will have important implications for wildlife management.

My first objective was to use telemetry …

Invasive Plant Occurrence Across Agency Boundaries: Two Case Studies From California, Natalie Otto

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Non-native invasive species (NNIS) are a major concern confronting land managers in and surrounding protected areas such as national parks. These areas are managed by a variety of entities, all of which have different mandates, management priorities, and resources that are allocated to NNIS programs. These differences can result in ecological divergences at land boundaries and can create barriers to cooperative management. Through interviews and ecological data collection, this research addresses three topics; 1. It identifies disparities in NNIS and disturbance occurrence between jurisdictions and tests the strength of correlations between these variables; 2. It seeks to determine what role …

Responses Of Pacific Fishers To Habitat Changes As A Result Of Forestry Practices In Southwestern Oregon, Tessa R. Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The fisher (Pekania pennanti) is a medium-sized carnivore found in mature forest stands across much of the northern United States. Although historically abundant in the west, fisher populations declined rapidly after fur trapping, extensive logging, and urban development reduced their numbers. Currently, biologists are concerned about the effects timber harvest practices have on fisher tolerance and adaptability when faced with changes to high-quality habitat stands. Tree removal and thinning of understory vegetation are frequently used to alleviate the spread of wildfires in previously dense forest stands with a potential for large-scale habitat loss; yet, a deficit of large …

Effects Of Appetitive, Pre-Exposed, And Novel Distracters On Interval Timing Behavior: Role Of Nomifensine Within The Prelimbic Cortex, Alexander R. Matthews

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Poor attentional focus harms the estimation of time within the seconds-to-minutes range, i.e. interval timing. Interval timing behavior is related to several cognitive functions including perception of the passage of time, decision making, and to memory processes. Harmful delays in timing are caused by distractions of attention, within the timing task in the form of novel, or familiar distracters, which may or may not have been previously conditioned. The purpose of this dissertation was to explore how attention to novel or familiar distractions within the timing task can be altered using catecholamine reuptake blocker nomifensine. The experiment in Chapter 3, …

Visitor Perceptions And Resource Conditions Of Campsites In Two Coastal Alaskan National Parks, Shannon T. Wesstrom

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Increasing visitation in parks and protected areas presents managers with the challenge of providing quality visitor experiences while mitigating ecological impacts from recreation. Successful management strategies often suggest determining desired conditions for visitor experiences and ecological conditions to establish thresholds. These thresholds can then be compared to existing conditions in order to determine if changes in management strategies should be made. By integrating visitor survey results with ecological assessments, this research is a unique coastal Alaskan regional analysis of the three components of a management framework: 1. Establishes visitor determined thresholds of acceptability for crowding and coastal resource conditions in …

Evaluating Planning And Management Of Natural Resources Within The Utah State Park System, Erin K. Mann

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A change in management style, combined with increased visitation and the advanced age of guiding documents used to describe conditions and goals (known as Resource Management Plans) in Utah’s State Parks, are leading park managers to potentially not fulfill the objectives stated in their Resource Management Plans. Using a research tool known as “content analysis,” we analyzed the Research Management Plans of ten sample parks and found that written plans had strong priorities and goals regarding the care and management of natural resources. Significant findings included strong emphasis on resource protection, data collection, and research. Pre-written questions were asked of …

A Laboratory Study On The Geometric Effects Of Piano Key Weirs On Scour For Non-Cohesive Substrates And Simple Mitigation Techniques, Wyatt Lantz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sustainable flood control infrastructure is needed as climate change continues to produce more extreme precipitation events, as our water infrastructure continues to age, and as populations continue to grow and expand. Non-linear weirs, such as labyrinth and piano key weirs, are sustainable passive flood-control structures due to their improved hydraulic performance, and low maintenance and construction costs. However, like other structures, these weirs are susceptible to local scour, which is removal of soil and rock due to hydraulic forces. The scour phenomenon is a complicated process dependent upon multiple variables. There is limited information for non-linear weirs with little directed …

The Velvet Ants (Hymenoptera: Mutillidae): Systematics, Biology, And Biogeography Of A Little-Known Family, George Charles Waldren

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Insects are a ubiquitous and species-rich component of the biologically-diverse planet we inhabit. The majority of insects are understudied, with many species awaiting formal description and their natural history yet to be discovered. Members of the family Mutillidae, commonly known as velvet ants, are one of these little-known insect groups. Velvet ants are technically wasps, and the wingless females superficially resemble true ants of the family Formicidae. Further, they frequently have a ‘velvety’ appearance and are often brightly colored to serve as a warning to would-be predators that they have the ability to inflict a painful sting. These insects are …

The Effects Of Cannabinoids On Stress-Coping Behaviors And Neuroendocrinological Measures In Chronic Unpredictable Stress: A Preclinical Systematic Review And Meta-Analysis, Noa Reuveni

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It is unclear if cannabis helps individuals cope with life’s stressors or increases the likelihood of developing stress-related disorders such as depression. Chronic unpredictable stress is a validated model of depression that exposes rodents to a series of frequently-occurring, intermittent stressors over the course of a few weeks. This systematic review and meta-analysis summarizes existing research using rodents on the effects of cannabinoids on stress-coping behaviors and neuroendocrinological measurements in chronic unpredictable stress. Databases were systematically searched for articles that met inclusion criteria, and effect sizes between control chronic unpredictable stress groups and cannabinoid-treated chronic unpredictable stress groups were calculated. …

Compost And Cover Crop Effects In Dryland Organic Wheat, Michael D. Deakin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Producers of dryland organic wheat (Triticum aestivum L.) in the western USA struggle to maintain adequate soil fertility due to the high cost of organic fertilizers and concerns over moisture use of cover crops. Low soil fertility results in decreased wheat yield and quality, and increased year-to-year variability in yield and quality based on weather. This study was conducted to measure the effects of, and interactions between, cover crop mixes and a one-time compost application on soil health and winter wheat yield and quality. The study was located on three adjacent certified organic wheat farms near Snowville, UT, each …

Variability In Long Bone Processing: The Result Of Bone Resiliency Or Marrow Utility?, Jonathan P. Keith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In archaeology, the study of animal remains helps researchers understand what animals past hunters sought to prey upon and what decisions they made related to field butchery. Archaeological excavations in sites of the Northern Great Plains and the Snake River Plain have shown that a disproportional amount of bison limb bones occur relative to other bones in the body. Limb bones contain marrow, and to break these open ancient butchers would use hammer stones and rock anvils. Such processing behaviors often leave impact scars, and these often vary in frequency from one part of the skeleton to the next.

My …

Investigating Routes And Effects Of Pesticide Exposure On The Blue Orchard Bee (Osmia Lignaria), Andi M. Kopit

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

With native pollinator species on the decline and the honey bee (Apis mellifera L.) industry suffering, it is imperative that we understand the impacts of agricultural practices on pollinators. The blue orchard bee, Osmia lignaria (Megachilidae), is an important alternative pollinator of commercial orchards. Osmia lignaria are solitary, cavity nesting bees with a wide distribution across North America. This species and other solitary, cavity nesting bees experience different routes of pesticide exposure than social pollinators, such as colony-dwelling bumble bees and honey bees. Chapter I focuses on routes of pesticide exposure experienced by cavity-nesting bees, incorporating the relative importance …

Becoming Bare: A Memoir, Andrew James Romriell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis is the first part of what I envision to be a full-length memoir. I focus throughout on multiple themes, primarily what it meant to grow up gay in a culture, state, religion, and society where others told me I was wrong to be such. I explore these themes linearly through extended metaphors such as clothing, outward appearances, nakedness, and literal hiding. I begin with an introduction before moving into the main content where I explore my life between the ages of eight and eighteen as I struggled to understand the impact of religious, educational, and familial cultures on …

The Utah Statesman, April 26th, 2021, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Earth Day In A Year Of Reckoning., Rachel Robinson-Greene

Languages, Philosophy, and Communication Studies Faculty Publications

Last year’s Earth Day, April 22nd, 2020 was unique. The United States, the country where the now international holiday originated, had realized it was in the midst of a pandemic just a little more than a month earlier. Lockdowns and closures meant less travel and less pollution. We all got a chance to see a glimmer of what might happen if we in the West reduced our consumption, even if only for a short period of time. Carbon emissions were dramatically reduced. Animals roamed the landscape. We were provided with a poignant visual representation of exactly what we have done …

Light At The Core Of Reconciliation In Canada - Introducing The Path Of Algonquin Chief T8aminik Rankin And Kokum Marie-JoséE Tardif, Sandy Lamalle

Journal of Indigenous Research

Inspiring men and women have been weaving profound change across Canada - contributing to the process of Truth and Reconciliation. Among the survivors of the residential schools, not only did they have the courage to resist oppression, to overcome trauma, anger and the destructive representations of themselves they had to cope with, but also the strength to engage in reconciliation and revitalisation of their cultures and languages. This article is a tribute to these weavers of hope and new relationships, and sheds light on their decisive role in leading and empowering transformation. In the perspective of sharing the testimony of …

Utah Livestock Producer Preferred Drought Management Strategies, Kynda R. Curtis, Tatiana Drugova, Ruby Ward

All Current Publications

This fact sheet, the second in a series of three, examines livestock producer preferred drought management strategies and how producer preferences change depending on drought severity and expected grazing efficiency. Severe drought in livestock production leads to decreases in feed availability, range or hay quality, and overall lower quality beef (Holupchinski et al., n.d.). Hence, drought increases production costs and producer dependence on imported feed. Thus, extended drought poses a threat to agricultural productivity and the economies of rural and tribal areas in Utah.

May Swenson: The Rise Of The Reluctant Feminist, Emily Gould

Student Research Symposium

Lesbian. Woman. Feminist. These are just a few of the labels that others tried to impose on May Swenson throughout her life. However, Swenson revolted against the bonds that others tried to place on her. She did not want to be secured to labels, conform to groups, or be shackled to restrictive societies. Rather, she found her solace in her own soul, and her peace through her individual perspective. Swenson lived her life according to her standards, her beliefs, her doctrine, her conscience, and through her poetry she encouraged others to do the same. One of Swenson’s most anthologized poems, …

Virtual Worlds Promise And Threaten To Transform Society–– Legal Framework Reassessment Needed, Jessica Ivie

Student Research Symposium

The emergence of virtual worlds on platforms such as Animal Crossing, World of Warcraft, and Second Life are creating new, global connections that raise both security opportunities and concerns. Virtual worlds have recently been utilized to create social change anonymously, as evidenced by pro-Hong Kong democracy demonstrations taking place on Animal Crossing and Black Lives Matter protests taking place across many platforms (Sims, Grand Theft Auto, World of Warcraft, etc.). The blatant use of virtual worlds by potentially dangerous groups has given the FBI (and other security organizations) clear insights into their plans, and makes the job of security workers …