Digital Commons Network^™

Centering Indigenous Knowledge: Reimagining Research Methods, Pedagogies, And Sustainability With Niitsitapi Awaaáhsskataiksi (Blackfoot Elders), Sandra Bartlett Atwood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

My research sought to better engage with Indigenous ways of knowing and being (IWKB). Specifically, I collaborated with Blackfoot Elders (and Hawaiian Kupuna) to better understand 1) their perspectives towards land, 2) what factors instigate and perpetuate these perspectives, 3) how these perspectives play out in terms of identity; well being; daily life; education; environmental concern, behavior, and stewardship, and 4) ways that these perspectives towards land can inform and transform Western perspectives on land and perhaps lead to better and more equitable social-ecological outcomes. I approached this from three angles. First, I described a method for braiding Indigenous and …

Surface-Functionalized Silica Nanocarriers For Mitigating Water Stress In Wheat And Benefiting The Root Microbiome, Anthony Cartwright

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Changes in climate and shifting patterns of drought threaten the growth of important cash crops like wheat. The element silicon serves as a plant nutrient and shows promise for strengthening wheat against drought while remaining safe to both the crop and the positive bacteria that grow on its roots. Silicon can be added to wheat in the form of silicon-dioxide nanoparticles featuring protective coatings made from plant-beneficial nutrients. These nanoparticles can be engineered with high surface area or porous structures allowing them to be loaded with additional nutrients that can be delivered to crops. In a laboratory setting, such nanoparticles …

Exploring Versatile Glycosyltransferases From Microorganisms For Natural Product Biosynthesis, Jie Ren

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation is mainly focused on exploring versatile glycosyltransferases from different microorganisms with the purpose of biosynthesizing bioactive natural product glycosides through microbial fermentation. This engineered biosynthesis approach is environmentally friendly, safe, and efficient compared with plant extraction, chemical synthesis, and enzymatic synthesis. Additionally, we applied these characterized glycosyltransferases as efficient biocatalytic tools to produce novel glycosides to expand the chemical repertoire of nature. These novel compounds showed improved water solubility and some of them exhibited enhanced stability and biological activity, which laid the foundation for the development of new therapeutic agents.

In my dissertation research, I have discovered two …

Fishing Out Nutrients: The Spatiotemporal And Ecological Dynamics Of Fishery-Based Nutrient Extraction, Adrián A. González Ortiz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Marine fisheries are one of the most impactful human activities on the planet. Since the 1950s, marine fisheries have removed billions of metric tons of marine biomass leading to substantial declines in many fish populations. Among their impacts, we have begun to investigate the role of fisheries in disrupting marine nutrient cycles. Specifically, removing biomass can change nutrient cycles by reducing the amount of nutrients stored within animal biomass.

No studies have investigated the large-scale geographical and ecological contexts of nutrient removal by fisheries over a large timescale. For my thesis, we compiled data on fishery-targeted organisms' carbon, nitrogen, and …

Temporally Weighted Averaging: The Effects Of Test Delay On Spontaneous Recovery Of Choice, Jack Van Allsburg

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Foraging animals in natural environments must track the value of different behavioral options in order to make decisions that maximize their food intake. The process by which they track this value is poorly understood, but holds relevance for our understanding of how animals make choices in general. In a series of experiments conducted in operant chambers, we put rat subjects in a choice scenario where they could press two levers, one of which would intermittently produce the delivery of food pellets on a rich (more frequent) schedule, while the other would do the same on a lean (less frequent) schedule. …

Investigating Mitochondrial Influence On The Rate Of Anaerobic Glycolysis In An In Vitro Model, Mackenzie Jenna' Taylor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The rate at which the muscle acidifies after an animal is harvested has a profound effect on the quality of the resulting pork. When acidification increases gradually, desirable pork quality characteristics are developed. In contrast, rapid acidification deteriorates pork quality, exemplified by the pale, soft, and exudative (PSE) pork defect. The rate of acidification is determined by the rate of anaerobic metabolism in postmortem muscle. Yet the processes controlling postmortem anaerobic metabolism are not well understood. Recent research suggests that mitochondria, the powerhouse of the cell, may influence this process by competing for substrate (pyruvate) with anaerobic metabolism, thereby reducing …

Antimicrobial Peptides In Transgenic Silkworm Silk, David Jaden Turner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Overview: People in India and China have produced silk textiles for thousands of years. Silk is a biodegradable, biocompatible compound used in the production of clothing, bedding, furniture, industrial materials, and medical applications. Over the last 30 years, research has increasingly investigated silk’s antimicrobial effects and how to augment its natural abilities. Antimicrobial peptides, or AMPs, are also an area of increasing interest as the rise of antibiotic resistance reduces the efficacy of current treatments. This project plans to systematically synthesize a fusion protein that incorporates the beneficial properties of each constituent into commercial silkworms.

Innovation: This project seeks to …

Water Conservation Through Drought-Resilient Landscape Plants And Deficit Irrigation, Ji-Jhong Chen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Increases in urban population and inadequate rainfall result in imbalanced water budgets in urban and sub-urban regions. Water conservation becomes important in urban landscapes because of increased water demands. Modern landscape designs require drought-resistant plants to maintain urban landscape greenness during water scarcity. Irrigating plants at their irrigation requirements, which is the minimum irrigation rate that can achieve acceptable aesthetic quality, can also conserve water. However, the drought tolerance and irrigation requrements of most landscape plants have not been widely evaluated. Shepherdia ×utahensis ‘Torrey’ (‘Torrey’ buffaloberry) and Penstemon species (beardtongues) are low-water-use landscape plants, but their drought resistance mechanisms are …

Anthropogenic Factors Affecting Common Raven Occurrence And Depredation Of Artificial Nests Within Greater Sage‐Grouse Habitat In Southern Utah, Zoë S. Moffett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Certain species of wildlife are more generalist and adaptive than others. These species often flourish when supported by human activities that provide additional food and habitat for them. The common raven (Corvus corax; hereafter raven) is one such species; their populations have risen and spread throughout the Intermountain West. As generalist scavengers and predators, ravens have been found to pose a severe threat to several threatened or sensitive species, including the greater sage-grouse (Centrocercus urophasianus; hereafter sage-grouse). The purpose of my research was to determine the specific anthropogenic and habitat factors that may increase the threat …

Physiological Consequences Of Adrenal Enlargement And Implications For Toxin Resistance In North American Snakes, Megen E. Kepas

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The long observed relationship between enlarged adrenal glands and toad-eating in snakes has remained a mystery in physiological ecology and herpetology. It has been predicted that large adrenal glands may be capable of producing higher amounts of key hormones, and that higher plasma hormone levels may lend some behavioral or physiological benefits after a toxic toad has been eaten. I address questions surrounding adrenal enlargement and its potential benefits to toad eaters in four research chapters. In my second chapter, I quantify adrenal hormone output at different embryonic stages in the toad-generalist snake Thamnophis elegans and examine the ability of …

Fremont Legacy In Capitol Reef And The Waterpocket Fold: A Radiocarbon Analysis Of The Pectol Collection Coiled Basketry Using Bayesian Modeling, Chelsea Cheney

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Perishable artifacts provide ample opportunity to better understand past human lives. Artifacts constructed from shorter-lived plant materials can make a significant contribution to archaeological research through radiocarbon dating. Analyzing and radiocarbon dating the basketry construction types from the Pectol Collection aids in the development of a more precise prehistoric timeline for the Capitol Reef and Waterpocket Fold (CRWF) area of southeastern Utah. Basketry technology construction is treated as a signal for growing Fremont occupancy throughout the Colorado Plateau and eastern Great Basin, and can the provide prior information used to better organize Bayesianbased age models. From AD 750–1050, a narrow …

Decolonizing Memory: Erasure And Resurgence Of Indigenous History In The Intermountain West, Chase Wilson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Decolonizing language, memory, and history is an important step in confronting dominant historical narratives in higher education and the general public. This paper focuses on the settlement of the US Intermountain West – where the violent roots of white settlement have been downplayed in the public historical consciousness through the dominant narrative of "pioneer heritage." Beginning with a study of Ogden, Utah, early histories of the area are reexamined, analyzing the contexts in which Native peoples are mentioned (or not) in order to understand their presence by the turn of the twentieth century. Next, my focus moves on to analysis …

By Other Means: The Political And Economic Motivations For The Formation Of The Anglo-Japanese Alliance Of 1902 In The United Kingdom, David Cornell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis is an attempt to answer the question of why British political leaders made the Anglo-Japanese Alliance of 1902. To answer this question, I have used primary sources such as government communications, newspaper articles, and articles from scholarly journals. Also, I have consulted the works of past historians to better understand the complex topic of the Anglo-Japanese alliance. This thesis is divided into three chapters. Chapter One explains the events that led up to the creation of the treaty between Britain and Japan and clarifies why this treaty was so unusual for the British Empire in the early 1900s. …

A Mechanistic Examination Of Interspecific Competition Between Wild And Domestic Herbivores, Courtney Check

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Large herbivores, such as mule deer and cattle have similar life histories and likely compete for resources. However, quantifying the extent to which these species compete and the specific resources they compete for has proved challenging. My research examines if cattle influence deer abundance and behavior due to competition for forage, competition for shade, and/or by affecting the predation risk of deer. Using a grid of autonomous trail cameras, I was able to determine if cattle abundance influences local deer abundance in relation to specific resources and habitat features. Using GPS data from collared deer, I was also able to …

Evaluating Beaver Translocation Methods For Desert River Restoration, Christine E. Sandbach

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wildlife translocation, or moving wild animals from their original home to a new location, is a common conservation practice; however, translocation programs have variable success rates. Beaver translocation is often used in stream restoration projects due to beavers’ role as ecosystem engineers—beavers enhance riparian habitat by building dams that hold water and create more diverse channels. Beaver translocation success is often limited by high mortality and long distance movement after release, and improvement in translocation methods is needed. My objective was to evaluate two methods of improving beaver translocation success in a degraded desert river in east-central Utah: beaver dam …

From Flames To Forage: How Wildfire Affects Elk Behavior And Abundance, Megan M. Whetzel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Rocky Mountain elk (Cervus elaphus nelsoni) is an ecologically and culturally important wildlife species in the Intermountain West, but it is facing habitat changes caused by increasing fire activity. Wildfire frequency is projected to continue to change into the future, yet increases in annual area burned and increases in area burned at high severity may actually represent opportunities for some species. Large herbivores like elk may benefit from increased access to regenerating areas where forage abundance and quality are often elevated. Therefore, effective management of wildlife populations may depend on quantifying how large ungulates, like elk, alter …

The Intersections Of Payments For Ecosystem Services, Gender, And Conditionality In A Bolivian Case Study, Alicia Potter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Payments for Ecosystem Services (PES) have gained traction since the 1990s and are designed to provide cash or in-kind incentives to natural resource managers who alter land management behavior to protect ecosystem services. Conservation programs generally are known to interact with household and community gender dynamics. For other types of cash transfers, recent literature has noted that presence of conditionality (a key aspect of PES) may create or reinforce gender inequalities, which often manifest in household divisions of labor and decision-making where women may be obligated to complete more unpaid work or experience less control over resources.

Based on a …

Quantifying The Impacts And Assessing The Permeability Of A Divided Four-Lane Highway On Migratory Mule Deer, Daniel P. Taylor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Increased human development and expansion has led to an ever-growing transportation network, which has both direct and indirect ecological impacts to local wildlife populations. In response, wildlife crossing structures have become an increasingly fundamental component of wildlife conservation throughout the United States. The focus of this study was a 13.5 km section of US Highway 395, Mono County, California. The California Department of Transportation recently identified this section of highway, hereafter known as the Mammoth Wildlife Crossing, as the highest priority location for wildlife crossing structures along US 395 within Mono County. The goal of this study was to use …

Comparative Study Of Clustering Techniques On Eye-Tracking In Dynamic 3d Virtual Environments, Scott Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Eye-tracking has been used for decades to understand how and why an individual focuses on particular objects, areas, and elements of space. A vast body of knowledge exists on how eye-tracking is measured. However, historically, eye-tracking has been predominately studied using 2D environments, with limited work in 3D environments. The purpose of this study is to identify which methods most accurately represent the areas that have captured the participant’s visual attention within a 3D dynamic environment. This will be completed by evaluating different clustering methods of fixations using a customized virtual reality tool that collects eye-tracking data. There exist several …

Population Physiology, Demography, And Genetics Of Side-Blotched Lizards (Uta Stansburiana) Residing In Urban And Natural Environments, Spencer B. Hudson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wildlife populations across the globe are poised to lose their natural habitat to urbanization, yet there is limited information on how different species handle living in cities. Animals in urban environments are often susceptible to novel stressors, which can threaten their individual health and population viability. The physiological characteristics of animals, such as those related to metabolic hormones, oxidative stress, and immunity, are expected to be important for survival in this context. If so, animals persisting in urban areas may demonstrate physiological differences from their natural counterparts, perhaps due to evolutionary change. These potential outcomes have been documented in birds …

Mountain Lion (Puma Concolor) And Feral Horse (Equus Ferus) Interactions: Examining The Influence Of A Non-Native Ungulate On Predator Behavior In A Semi-Arid Environment, Peter C. Iacono

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A non-native is a species that evolved in one ecosystem and has established within another. Non-native species can thrive in new ecosystems as they can spread quickly, outcompete and replace native species, and disrupt food webs. Domestic horses were brought to North America by Europeans in 1493. They are now found in 11 states across the western United States. Feral horses can negatively impact vegetation, endangered species habitat, compete with native species, and be important prey for mountain lions under certain conditions. But do feral horses affect the food web? Feral horses are managed by large removals to reduce the …

Subduing The Wolf: Utah Pioneer Identity And The War On Wolves Between 1852 And 2020., Mason Lytle

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah has a unique history of pioneer settlement connected to the Church of Jesus Christ of Latter-day Saints. This history has become a source of pride that began with the first white settlers. I have come to call this the “deseret pioneer” identity, to differentiate from other western settlers. From the nineteenth to the twenty-first century, politicians and agriculturalists used this “deseret pioneer” identity to thwart federal protections for wolves and respond to wilderness policies that made Utah the only “rocky-mountain” state to not have wolves in the twenty-first century.

Impact Of Forage Conditioner Systems On The Harvesting Of Alfalfa, Derrick Hendry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study analyzed three major brands of conditioner rollers and determined how they performed in drying the forage crop alfalfa. Each type of conditioner roller would cut a wide and narrow windrow. All the windrows were tested and analyzed the same. The study was concluded once the forage was baled.

“Whan The Turuf Is Thy Tour”: Analyzing Gender Codes Of Burial Monuments In Late Medieval And Early Modern England, Shelbie Durrant

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The cultural pressures of gender conformity and "norms" have lasted as long as the social constructs of gender themselves. Gender is present and can be analyzed in symbols within material culture such as the Russell family funerary monuments located in their private chapel in Chenies, London. Gender, although not always transparently at the front of consciousness, was interacted with, performed, and memorialized in life and death, especially for families that were high status. The presence of gender in these funerary monuments illuminates how expected conformity of gender norms were in this time — so present that they were literally set …

Consumption Of A Western Diet Enhanced Colitis-Associated Colorectal Cancer And Dysbiosis Of The Fecal Microbiome In Mice Notwithstanding Dietary Intervention Or Fecal Microbiome Transfer, Daphne Michelle Rodriguez Jimenez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In a rodent model of inflammation-associated colorectal cancer, consumption of a Western-style diet increases gut inflammation and enhances risk of developing colon tumors. The goal of this dissertation was to understand the contribution of bacteria within the large intestine on colon inflammation and colon tumorigenesis. Two pre-clinical animal studies were performed using two different intervention strategies to shift the microbiome, and potentially gut inflammation and tumor development: 1) an experiment using dietary supplementation with black raspberries, a functional food enriched in bioactive anthocyanins with purported antiinflammatory activity, and 2) an experiment using fecal microbiota transfer from mice fed a healthy …

Multispecies Genomic Sex Identification Using Ddx3 Gene Polymorphisms, Jessica Felts

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

PCR sex determination assays must be reliable and cost effective due to the frequent and integral use of these assays in biological research and the animal production industry. Thus, the design of proof of a primer pair with a built-in control is warranted to not only bypass the extra cost of a multiplex reaction, but also to prevent anomalous results that have been documented with other primer pairs.

The objective of this study was to design primer pairs with built in PCR amplification control to identify sex in Equus caballus (domestic horse), Homo sapiens (humans), Macaca mulatta (rhesus macaque), and …

Happy Or Sad? Quaking Aspen (Populus Tremuloides Michx.) On Cedar Mountain, Southern Utah, Jaycee Cappaert

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Quaking aspen forests are important communities in the western United States where they provide preferential food and habitat for animals, limit wildfires from spreading, and have favorable aesthetics, among other things. Their putative decline is an issue for ecology and management. We remeasured the aspen population on Cedar Mountain, Utah, to assess changes to its condition since it was originally surveyed in 2008. We found that the area comprised of stable aspen (>80% aspen) decreased from 84.3% to 69.7%. The amount of mortality has increased slightly over the last decade, but crown dieback has stayed virtually identical. Additionally, the …

Co-Creating Culturally Inclusive Climate Change Programming: A Qualitative Study With Indigenous Populations In Southeast Utah, Bayli R. Hanson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study explores the impact of climate change on underrepresented communities, particularly Indigenous populations in the Colorado Plateau region, and the negative effects on their cultural identities and traditional practices. Despite their knowledge and connection to the land, Indigenous communities are experiencing climate change at a more extreme rate due to their geographical location and the lasting impacts of settler colonialism. The study aims to better understand Indigenous perspectives of climate change, co-create a climate change curriculum with Indigenous populations in southeastern Utah, and apply it to an Indigenous-centric field experience. By incorporating traditional ecological knowledge and Western science practices, …

Treatment Of Yellow Fever Virus With The Ns4b Inhibitor Bdaa And Effects On Rna‐Sensing Innate Immune Pathways In Hamster And Mouse Models, Abbie E. Weight

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Yellow fever (YF) is an acute and often severe disease cause by yellow fever virus (YFV). Although there is an effective vaccine available to prevent YF, there are no antiviral drugs approved to treat the disease, which has a considerable disease burden in endemic areas of South America and Africa. BDAA is an experimental antiviral treatment which has shown efficacy against YFV both in cell culture and when administered before infection in an animal model of disease. BDAA targets the YFV protein NS4B and has two reported mechanisms of action: the primary mechanism of action is the direct inhibition of …

The Barriers To Movement: The Effects Of Anthropogenic Linear Features On The Space-Use Behaviors Of Mule Deer And Pronghorn In Utah, Ronan B. Hart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Human development of structures like roads, fences, and other linear features can make it difficult for animals to move around their environment, affecting their ability to find food and avoid danger. Animal movement and the way they use space comes about from their responses to their surroundings and their choices to balance risk and reward. Because of this, we can understand how roads and fences affect wildlife by studying the way they move around their habitats. In this thesis, I focused on two large herbivores, mule deer and pronghorn, and studied how they use the space within Utah, United States …