Digital Commons Network^™

Feral Horses And Native Ungulates: Evaluating The Potential For Competition In Predator–Prey Communities Of Alberta’S Upper Foothills, Birch Gano

Graduate Student Theses, Dissertations, & Professional Papers

Feral herbivores are expanding in range and numbers globally, yet their community-level effects in ecosystems are poorly resolved. We evaluated whether feral horses reshape predator–prey–vegetation dynamics in Alberta’s Upper Foothills, Canada, through two pathways; i) potential exploitative competition for forage and ii) apparent competition via shared predators. We combined fecal DNA metabarcoding with remote wildlife cameras to quantify diets, spatiotemporal co-occurrence, and the role of horses in carnivore diet. We analyzed 241 ungulate scats (feral horses, elk, bighorn sheep, cattle, moose, and deer), 96 combined camera-years at 23 sites, and 190 carnivore scats (wolves, cougars, coyotes, bears) from 2023–2025. The …

Initial Qualitative Inquiry Into Social Proverb Use And Acceptability, Emma K. Hinds

Graduate Student Theses, Dissertations, & Professional Papers

Currently,  1 in 36 individuals are diagnosed with autism spectrum disorder (ASD), which is characterized by social communication differences and restricted and/or repetitive behaviors. Many children with ASD also present with sensory, behavioral, and emotional differences, underscoring the need for specialized, evidence-based interventions. Social proverb is a novel intervention approach developed by Dr. Schoffer Closson that provides in-the-moment guidance by explicitly stating expected social behaviors and the rationale behind them (e.g., “We cover our coughs, so we don’t spread germs”). To date, no research has examined the use of social proverbs as an intervention strategy. The purpose of this qualitative …

From Environment To Population Dynamics: Integrating Physiology, Morphology, And Demography In A Montane Migratory Bird, Beverly Sunshine Domschot

Graduate Student Theses, Dissertations, & Professional Papers

Environmental variation shapes population dynamics by influencing how individuals acquire and allocate resources. However, the pathways linking environmental conditions to population-level outcomes remain difficult to resolve because they operate across multiple levels of biological organization. Traits such as physiology and morphology mediate these relationships by shaping how individuals respond to challenges and convert resources into survival and reproduction. Physiological traits can change rapidly in response to short-term conditions, whereas morphological traits reflect longer-term processes related to performance and energy balance. Despite their complementary roles, these traits are typically studied in isolation, limiting our ability to understand how environmental conditions propagate …

Embodied Women’S Health In The Pacific: Biocultural Pathways Of Hormones, Immunity, And Reproduction, Courtney Callidora Manthey

Graduate Student Theses, Dissertations, & Professional Papers

This dissertation examines women’s health through a biocultural framework that integrates biological anthropology, medical anthropology, and public health, with a central focus on the Pacific. It advances embodiment theory as a unifying approach for understanding how lived experience becomes biologically incorporated across the life course, shaping reproductive, endocrine, and immune outcomes. Grounded in research in Sāmoa and situated within broader comparative contexts in the United States and Amazonian populations, this work argues that women’s health cannot be fully understood through biomedical indicators alone, but must instead be interpreted within historically, culturally, and environmentally embedded Pacific contexts and beyond. The dissertation …

“What’S Gender Got To Do With It?” The Chatelaine, Artifact Analysis, And The Presumption Of Gender, Dane Alexander Williams

Graduate Student Theses, Dissertations, & Professional Papers

The use of diagnostic artifacts to determine gender when analysis of skeletal remains is uncertain is a long-standing practice within archaeology. Material culture is noted, including weapons and personal items used exclusively by a specific gender within a culture, allowing for possible gender determination during excavation or review. However, issues arise when diagnostic artifacts are found not to be used solely by one gender within these cultures. Biases on the part of researchers, unintentional though they may be, are a determining factor. This, in turn, affects the public's views on history. Examples of this can be seen in our current …

Lake As Body: Ecofeminism And Animacy At The Great Salt Lake, Shae Barber

Graduate Student Theses, Dissertations, & Professional Papers

Water shapes cultural, social, and ecological systems. Yet, dominant economic, political, and academic frameworks often treat water as a backdrop or passive resource, ignoring it as an active participant in meaning-making and relationship-building. Viewing water as “nonliving” obscures how it participates in and co-creates relationships, limiting understanding about impacts of and responses to climate change and environmental degradation.

This thesis takes a mixed-methods and participatory approach including semi-structured interview, photovoice, and participatory mapping to examine relational practices between environmental advocates and the Great Salt Lake, a desiccating saline lake in Utah, U.S. As the lake continues to decline, dominant Western …

Evolution Of A Nitrogen-Fixing Endosymbiont And Integration With Its Diatom Host, Heidi Elizabeth Abresch

Graduate Student Theses, Dissertations, & Professional Papers

Endosymbiosis, where one cell lives inside of a different cell, is ubiquitous in nature and has enormous impacts on the ecology and evolution of both the host and the endosymbiont [1, 2]. These relationships exist along a continuum ranging from facultative—where both partners are able to live independently—to completely obligate—where partners can only survive in the presence of the other. The most famous examples being the chloroplast and mitochondrion [3]. After hundreds of millions or even billions of years of coevolution, highly-integrated endosymbionts are coordinated with the host on the genetic, metabolic, and cellular levels, but we do not understand …

Flight Control And Costs In Unsteady And Turbulent Airflows In Ringneck Doves (Streptopelia Risoria), Rémy Alexandre Delplanche

Graduate Student Theses, Dissertations, & Professional Papers

The aerosphere is a highly dynamic environment where turbulence (irregular, chaotic changes in airflow velocity) and unsteady airflows (variations in flow velocity with time at a given spatial point, e.g. gusts) are ubiquitous [1,2]. These airflows are known to perturb man-made aircraft [3,4], and are thus expected to challenge biological fliers such as birds. However, birds display remarkable flight control in turbulent and gusty conditions, suggesting that they have evolved mechanisms to resist aerial perturbations. This in-flight stability is broadly attributed to wing morphing, the capacity for wing shape and orientation to be altered during flight, yet how morphable wings …

Á’Po’Taki Iiyika’Kimaa Work/Try Hard For Such A Time As This, Misamsai’Piaakíí Longtime Charging Woman Kimberly Lynn Paul

Graduate Student Theses, Dissertations, & Professional Papers

This body of work adds to a recent shift in the academic landscape, valuing interdisciplinary research and Indigenous worldview. Predominant is the reversal of extractive research norms within Indigenous populations and the biosystems they steward, instead claiming Piikani (Blackfeet) led community-needs-based research valuing Indigenous data sovereignty, research methodologies, ethics, equity, and Indigenous empowerment. This research proffers requisite historical information providing the ‘why’ context, followed by three of the author’s studies: in toxic dumping, food sovereignty, and Piikani well-being. Under an environmental justice framework, the first study presents a cursory investigation of decades-long illicit toxic waste disposal reports linked to observed …

Evolutionary Genetics Of Wolbachia Density Variation And Effects On Host Fitness, John Paul Statz

Graduate Student Theses, Dissertations, & Professional Papers

Symbiotic interactions are widespread across the tree of life, and many insects associate with vertically transmitted intracellular bacteria whose fitness is tied to host reproduction. Because these endosymbionts transmit through the maternal line, selection often favors traits that increase the production and success of transmitting females. Over time, endosymbionts can evolve functions such as nutrient provisioning, defense against predators and pathogens, and contributions to environmental stress tolerance, thereby shaping host ecology and evolution. Yet these effects depend critically on the abundance and localization of endosymbionts within host tissues. This dissertation examines these processes in Wolbachia, the most common known animal …

Communicating Wildfire Risk In Real Time: An Idea Model Analysis Of Watch Duty Alerts, Audrey E. Miller-Greene

Graduate Student Theses, Dissertations, & Professional Papers

Traditional wildfire public information systems often rely on fragmented data provided through multiple government agencies and platforms. Historically, community members have been required to identify and piece together information necessary for preparation, evacuation, and decision-making during wildfire events. Watch Duty, a 501(c)(3), works to address this gap by compiling fragmented wildfire information for the public. The platform has undergone rapid growth and increased public reliance, providing a rationale for this research project. As Watch Duty expands its capabilities, its messages should be evaluated against established risk and crisis communication best practices. This study evaluates alerts released by Watch Duty during …

The Evolution Of Ritual Violence And Identity At Paquimé, Lacy Jaide Hazelwood

Graduate Student Theses, Dissertations, & Professional Papers

The prehistoric site of Paquimé, located in the Casas Grandes region of northern Mexico, was a major regional center characterized by its complex sociopolitical organization, distinctive architecture, and evidence of ritualized behavior. Previous research has documented skeletal trauma and processing patterns consistent with ritual violence within the Paquimé skeletal assemblage, including human sacrifice and cannibalism. However, questions remain regarding the identities of these individuals and the reasoning behind their selection for targeted violence by the community. Did an individual’s age, biological sex, kinship affiliations, and/or migrant status predispose them to these ritually violent acts? To address these gaps, this dissertation …

A Psychogeography Of The Lower Colorado River Basin, Arren L. Kimbel-Sannit

Graduate Student Theses, Dissertations, & Professional Papers

Dried-up canals. Superheated strip malls. Proliferating data centers. Infinite appetite for growth despite its apparent circumstances. Arizona may well be the state of the American future. This multi-genre series of essays from Arren Kimbel-Sannit offers a personal, political-economic and ecological critique of growth and accumulation in Arizona — from the perspective of someone who grew up in its suburban expanses, reported on its politics, and long sought to clarify his relationship with home.

When The Wind Is Right, Luke Matthew Kuennen

Graduate Student Theses, Dissertations, & Professional Papers

Rural Ukrainian Life Under, After, and Near Russian Occupation

Ukraine is endowed with several significant economic assets and plays a crucial role in global trade, particularly due to its rich agricultural resources and strategic location in Eastern Europe. Ukraine's agricultural strength largely stems from its geography and the quality of its soil. The country has about 41 million hectares of arable land, which is approximately 70% of its total land area. The soil is primarily chernozem, or black soil, which is highly fertile and rich in organic matter. This makes Ukraine's land among the most productive in the world.

When …

Ghostly Grieving In Theatre’S Now Also The Dramaturgy Of Perception And The Body In Contemporary American Ghost Plays, Jacob Mann Christiansen

Graduate Student Theses, Dissertations, & Professional Papers

“Ghostly Grieving in Theatre’s Now Also” explores how contemporary American plays and playwrights stage the dead as a way of understanding theatre’s unique language for dealing with the shared, complex human experience of grief. Focusing on theatrical ghosts and other “impossible” presences, I articulate how these figures function as dramaturgical devices. I also argue that theatre’s ghosts “set the stage” (as it were) for communicable meaning-making by inviting audiences into the tasks of creation and mourning.

My work draws on performance theory (especially phenomenological accounts of theatrical storytelling), on dramaturgical analysis, and on grief studies. In this dissertation project, I …

The Subadults Of Casas Grandes: A Bioarchaeological Study, Holli Kaye Mcdonald

Graduate Student Theses, Dissertations, & Professional Papers

Across the span of nearly eight hundred years, from AD 700-1450, the societies of the Casas Grandes region waxed and waned and left an astounding representation in the archaeological record. Best-known through the temporally older site of Convento (occupied during what is known as the Viejo Period) and the later site of Paquimé (occupied during the Medio Period), gradual cultural expansion and florescence across this period are witnessed through a variety of findings across decades of anthropological investigation.

Along with the artifacts and architecture unveiled during initial excavations at Paquimé and Convento, remains of 654 individuals were catalogued as well. …

Expectations In The Preservation Of Dna And Bacterial Organisms In Differential Montana Burials, Kaylee M. Hinds

Graduate Student Theses, Dissertations, & Professional Papers

This study investigates patterns of decomposition and biomolecular preservation in domestic pig (Sus scrofa domesticus) proxies under varying burial conditions in a cold, seasonal climate. Conducted at the Lubrecht Experimental Forest in western Montana, the project aims to evaluate DNA degradation, microbial activity, and environmental influences across shallow, deep, surface, and secondary burial contexts. Three pigs were placed in distinct burial treatments (surface exposure, partial burial, and full burial), with a fourth site later added following bear disturbance and carcass relocation. Environmental monitoring included temperature, and soil sampling before and throughout the decomposition process. Systematic sampling of bone, soft tissue, …

Thistlebloom Moondog, Gary W. Jensen

Graduate Student Theses, Dissertations, & Professional Papers

An aging grieving artist decides to write a memoir as part of a self-healing process, using samples of song lyrics from his extensive collection of original Americana songs as narrative prompts.  Steeped in wanderlust, aspiration, paradox and dysfunction, his is a tale of vexing sub-clinical troubles rooted in the mire of developmental and religious trauma.

Beyond Words: The Horse-Human Encounter In Equine-Assisted Psychotherapy For Residential Substance Use Treatment, Leah Finch Lungren

Graduate Student Theses, Dissertations, & Professional Papers

Equine-assisted psychotherapy (EAP) has emerged as a promising experiential therapeutic intervention, yet the lived experience of adults participating in EAP within residential substance use disorder (SUD) treatment settings remains underexplored. This hermeneutic phenomenological study examined the lived experience of 12 adults who participated in EAP groups during residential SUD treatment across three treatment facilities in the United States. The primary research question was: What is the lived experience of participating in EAP for adults in residential SUD treatment? Data was collected through semi-structured interviews and analyzed through iterative hermeneutic interpretation guided by van Manen’s (1990) existential framework.

Six themes emerged …

An Ecology Of Small Sorrows: Small Animals And The Fragile Ecosystems Inside Us, Haley H. Yarborough

Graduate Student Theses, Dissertations, & Professional Papers

In An Ecology of Small Sorrows, Haley Yarborough uses a series of personal essays to explore how encounters with small life shape her understanding of herself. This collection is inspired by many talented writers — Lucy Cooke’s insights into animal biology, Andy Weir’s humor and knack for explaining complicated topics, Ben Goldfarb’s insightful exploration of the overlooked, and Sabrina Embler’s beautiful, poetic reflections on the natural world.

These essays touch on how small animals serve as mirrors for us, through our experiences with illness, loss, insecurity, and survival. While a lot of modern media emphasize larger, charismatic species to tell …

Pestilent Air, Contagious Evil: Infectious Disease In Early Modern Poland, Danielle Marie Airola

Graduate Student Theses, Dissertations, & Professional Papers

The individuals buried in the cemetery of Czysty Square and the population of the vanished village of Gać lived and died during the early modern period in what is now modern-day Poland. Epidemics broke out repeatedly during this time, and the skeletal remains of several individuals buried in Czysty Square’s cemetery display pathological changes suggestive of infectious disease. These non-specific morphological changes created a need for DNA testing to search for pathogens associated with these lesions. In contrast, Gać’s population declined over time until the village’s abandonment. This has led to a hypothesis of an epidemic having contributed to the …

Promoting Hope And Resilience: Measuring The Psychological Effects Of An Undergraduate Climate Change Education Course, Clare Bridgett Maguire

Graduate Student Theses, Dissertations, & Professional Papers

The psychological effects of climate change are increasing, which has led to an increase in advocacy to research these effects. Current literature has included a focus on categorizing and understanding the psychological impacts, creating psychometrically sound instruments to measure the effects, and education as a tool to enhance coping strategies. However, limited research exists on measuring the emotional outcomes for students who engage in climate change education at the post-graduate level.

This dissertation explores the effects of an undergraduate-level climate change course on participants’ experiences of eco-anxiety, ecological grief, resilience, and hope to better understand the psychological effects of climate …

Characterizing Regional Human Necromicrobiome Communities In A Semi-Arid Desert To Inform Postmortem Interval (Pmi) Estimation, Georgia Rane Swelstad

Graduate Student Theses, Dissertations, & Professional Papers

Accurate estimation of the postmortem interval (PMI) remains challenging in forensic anthropology, particularly in arid and high-elevation environments where decomposition processes and insect activity are highly variable. Postmortem microbial succession has emerged as a promising alternative framework for PMI estimation. However, the effects of climate and elevation on microbial decomposition dynamics remain insufficiently characterized.

This study examines skin-associated microbial succession in human remains decomposing at the Forensic Investigation Research Station (FIRS) in western Colorado, a semi-arid, high-elevation environment. Microbial samples collected from five anatomical sites during the early postmortem interval are analyzed using 16S ribosomal RNA (rRNA) gene sequencing, and …

Growing Agroecology: Two Case Studies From The U.S. Student Farm Movement, Amelia B. Armstrong

Graduate Student Theses, Dissertations, & Professional Papers

Scholars and activists identify agroecology as a crucial science, practice, and movement to move towards more just, equitable, and sustainable agriculture and food systems. Yet, the exploitative industrial food system, that deepens inequalities like food insecurity (Clapp et al., 2025), reduces farmer autonomy (Rotz, 2015), and contributes to increased carbon emissions (Lin et al., 2011) and biodiversity decline (Rotz, 2015), still dominates. Understanding and mobilizing the different spaces that teach agroecology, then, is a crucial step in challenging the dominant industrial food system. Agroecology education in university settings is an important domain to investigate as potential contributors to this movement, …

Illusions Of Fairness And Sacrifice, Brady Schwertfeger

Graduate Student Theses, Dissertations, & Professional Papers

The American West is a shifting landscape. An incongruous expanse of isolation and urbanity, wilderness and extraction, wealth and welfare, clear water and fire. Fifteen years ago, I moved to my mother’s ancestral homeland of Montana, and have been here ever since. Before that, I was born and raised in Texas, both the West and the South (and often something else entirely), depending on who you ask. My experiences in this region have shaped me indelibly, and have inspired this collection of essays built around culture, politics, and justice in the West. “Pinedale, Wyoming” considers the musician as itinerant wanderer …

Evaluating Multi-Year Transferability Of Single- And Multi-Class Machine Learning For Remote Monitoring Of Beaver-Engineered Landscapes, Harris J. Sloan

Graduate Student Theses, Dissertations, & Professional Papers

Long-term satellite image archives enable ecological monitoring at large scales, but manual extraction of fine-grained features (e.g., beaver dams) remains time-consuming. Machine learning models may automate these tasks, but their temporal transferability for multiannual monitoring is still poorly resolved.

We evaluated the performance of two complementary neural-network frameworks across a 100,000-hectare watershed in Montana USA, using a decade of satellite imagery (2014-2024): (i) a single-class ResNet-50 beaver dam detector, and (ii) a multi-class ResU-Net landcover classifier.

In 2024, the dam detector identified 352 of 404 mapped dams, achieving balanced accuracy = 93.6%, precision = 79.8%, recall = 87.1%, F1 = …

Cormac’S Court: Knights Without God In A Savage Land; Or, Chivalry And Existentialism In Cormac Mccarthy’S The Road, Zoë Margaret Metelerkamp

Graduate Student Theses, Dissertations, & Professional Papers

Cormac McCarthy scholars have examined the influence of romantic grail quest literature and existential philosophy on McCarthy’s oeuvre, but they have treated these subjects independently of each other. This thesis offers a novel exploration of McCarthy’s use of these specific philosophical and literary precedents by focusing on the ways The Road unifies medieval literary principles in Chretien’s Perceval with the existential chivalry Søren Kierkegaard extrapolates in Fear and Trembling.

Highway Kind, Caitlin C. Thompson

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Archaeology Of Yellowstone's Cascade Corner: Findings And Diet Breadth Modeling, William Brent Powell

Graduate Student Theses, Dissertations, & Professional Papers

In the summer of 2025, archaeologists from the University of Montana conducted a pedestrian survey through the southwest corner of Yellowstone National Park to take inventory of cultural resources. Over nearly 50 miles of trail survey, the team identified and recorded 17 new archaeological sites, mostly consisting of sparse lithic scatters on the surface. The findings indicate recurrent use of the Bechler area since the Paleoindian period. This thesis aims to provide a comprehensive and detailed report on those findings, followed by an interpretation of the data through the lens of optimal foraging theory and diet breadth modeling. The first …

Searching For Nooks And Crannies: Geometric And Mechanistic Perspectives On Transformer Language Model Interpretability, Anna Marbut

Graduate Student Theses, Dissertations, & Professional Papers

Large language models (LLMs) have demonstrated remarkable linguistic capabilities, but the internal mechanisms driving their performance and behavior remain poorly understood. This dissertation investigates the interpretability of transformer-based language models from two complementary perspectives: the geometric organization of model internals in encoder-only models, and the mechanisms underlying safety behavior in decoder-only generative models.

In Part I, we address the challenge of measuring geometric properties in high-dimensional latent spaces, proposing and evaluating alternative measures of data spread that improve upon commonly used metrics. We then apply these measures alongside quantization-based metrics to examine the relationship between latent space geometry and downstream …