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Great Graminoids! Quantifying Vegetation On Roan’S Western Balds Over The Last 80 Years (1936, 1956, 2016), James T. Donaldson

Faculty Open Access Works

PowerPoint originally presented at Friends of Roan Mountain Winter Naturalists' Rally 11 Feb. 2017.

Grant funding from Friends of Roan Mountain for resampling historic transects from Carvers Gap to Grassy Ridge. Revised 2021, 2022, & 2023 (technical features and diversity); edited for clarity 2026 (for written rather than oral presentation & added references slide).

Discovering The Southern Appalachian Grassy Balds, Nicholas Lenze

Caravel Undergraduate Research Journal

Grassy balds are unique Appalachian wonders, open meadows in the mountains where, ecologically, there should be trees. It has been hypothesized that some of the balds originated more than ten thousand years ago and were kept open by the grazing of large herbivores such as the mastodon and the wooly mammoth. Over the course of earth’s history, environmental and anthropogenic factors have shaped, modified and maintained the balds. Up to one hundred grassy balds were once recognized to exist in the southern Appalachians, but fewer exist today due to forest succession (Gersmehl, 1970). Collectively, the grassy balds share a common …

Elevation, Demographic Composition, And Suicide Rates: A Municipality-Level Analysis In Colorado And Wyoming, Steven Loader

Walden Dissertations and Doctoral Studies

No abstract provided.

Species Distribution Modeling Of Parasitic Corpse Flower Rafflesia Arnoldii Var. Arnoldii R. Br Related To Host’S Fractional Photosynthetically Active Radiation In Tanggamus, Sumatra, Indonesia, Andriwibowo Andriwibowo, Suyud Utomo

Jurnal Penelitian Kehutanan Wallacea

Corpse flower, or scientifically known as Rafflesia arnoldii var. arnoldii R.Br, is one of the species that is endemic to Sumatra, Kalimantan and Java Island. As a parasitic plant, this species depends on its tree host species. While the host species depends on environmental variables include Fractional Photosynthetically Active Radiation (FAPAR), forest covers, and elevation for its growth. Then those variables were important to develop the Species Distribution Modelling (SDM) of R. arnoldii using the MaxEnt technique. One of the important regions for R. arnoldii in Sumatra is Tanggamus in Lampung, and currently, information about suitable habitats for R. arnoldii …

Urban Bird Community Interaction With Ficus And Non-Ficus Tree, Eka Alifikri, Yeni Aryati Mulyani, Ani Mardiastuti

Jurnal Penelitian Kehutanan Wallacea

Ficus trees are recognised as keystone species in forest ecosystems and are crucial for urban wildlife, especially birds. IPB Darmaga Campus, a biodiversity-rich urban area, hosts a variety of plant species, including Ficus and non-Ficus tree species, along with diverse bird species. This study aimed to compare the utilisation of Ficus and non-Ficus plants by birds in the area. Observations were conducted on 5 Ficus benjamina, 5 Ficus microcarpa, and 10 non-Ficus tree individuals. Ficus trees were used by 15 bird species from 12 families, with 1700 recorded interactions. In contrast, non-Ficus trees were …

Assessing The Conservation Needs Of Native Texas Crayfish Species Through Distribution Analysis And Species Distribution Modeling, Elizabeth J. Croft

Biology Theses

Crayfish have essential roles in ecosystems because they are ecosystem engineers and keystone species. However, crayfish species are threatened by degradation and loss of habitats, introduction of invasive species, and high levels of endemism. Texas provides no legal protections for crayfish, despite its large number of species and endemics in the state. The overall goal of this study is to clarify the distributions of native Texas crayfish species using literature records, citizens science, and field sampling data, and highlight species in need of more conservation research. Occurrence records from all collected data were combined to visualize the distributions of species …

Distribution Mapping And Modeling Of The Invasive Japanese Knotweed, Jossalyn Rogalski

Masters Theses

This thesis investigates the distribution of invasive Japanese knotweed across Michigan. This plant poses significant challenges to land management due to its rapid growth, environmental impacts, and difficulty of removal once established. Using geographic information systems (GIS), remotely sensed data, and secondary environmental datasets, this research maps current infestations and analyzes key factors influencing the species’ growth and dispersal, such as soil composition, hydrology, land use, and a range of environmental variables, including climatic (annual mean temperature, temperature seasonality, annual precipitation, precipitation seasonality), elevation, vegetation and hydrological indices (NDVI, EVI, NDWI), percent tree cover, and distance to roads. Spatial analysis …

An Assessment Of The Basihyal And Its Functional And Ontogenetic Relationships To The Masticatory Apparatus In Primates, Parker Mitchell Taylor

Graduate Theses and Dissertations

The hyoid is central to many important functions such as feeding, vocalization, and breathing. However, primate hyoid morphology has been widely understudied compared to other aspects of craniofacial morphology. This dissertation aimed to bridge gaps in the current understanding of primate hyoid morphological variation and the hyoid’s relationship with mandibular morphology. Using microCT, diceCT, and three-dimensional geometric morphometric methods, this work details broad taxonomic variation of basihyal shape, resting hyoid position, and suprahyoid muscle architecture in primates, and assesses such variation for the effects of phylogeny, allometry, and covariation between these elements and mandibular shape. These analyses were also conducted …

Effects Of Environmental Factors, Predation Risk, And Population Density On Neuromast Morphology And Distribution In Heterandria Formosa, Brielle Spencer

Theses & ETDs

Sensory systems play a crucial role in how fish respond to the environment, however variation in these systems are not well studied. This study examined how ecological factors influence neuromast morphology and distribution in the least killifish, Heterandria formosa. I tested the hypothesis that individuals from low density, high predation, low vegetation environments would show larger neuromast number and size than fish from high density, low predation, high vegetation populations. Neuromasts were stained and imaged in 140 fish, 10 males and 10 females from 7 different populations from northwest Florida. I stained the neuromasts using 4-Di-2-ASP and used a fluorescent …

Cross‑Scale Transferability Of Soil Moisture Model Parameters Using Satellite And Ground Observations And Experimental Studies, Niraj Karki

LSU New Orleans Theses and Dissertations

Soil moisture is a key variable in hydrology that controls water and energy exchange between the land surface and the atmosphere. Despite its importance, reliably estimating soil moisture is challenging because different measurement methods measure it at different scales and with varying accuracy. Ground-based sensors provide reliable point-scale data but are costly and spatially limited. In this context, models that can produce spatially and temporally consistent soil moisture are valuable tools. However, such models need calibration, and their use is limited by the unavailability of soil moisture data. Satellite products such as the Soil Moisture Active Passive (SMAP) offer wide …

Evaluating The Effects Of Urbanization On Meiofauna Biodiversity In Chattanooga’S Lentic Ecosystems Through Gis Applications, Keyle M. Bryant

Honors Theses

Urbanization is a leading driver of biodiversity loss in freshwater ecosystems, yet its effects on meiofauna—microscopic invertebrates that serve as key bioindicators of ecosystem health—remain poorly understood in lentic environments. This study evaluated the effects of urbanization on meiofaunal biodiversity in ten lentic waterbodies across Hamilton County, Chattanooga, Tennessee, by integrating environmental DNA (eDNA) metabarcoding, in-situ abiotic measurements, and Geographic Information Systems (GIS)-based land use analysis. Water samples were collected between January and April 2023 and processed using 18S rRNA amplicon sequencing to assess biodiversity as richness (amplicon sequence variants or ASVs, phylogenetic diversity or PD, and community composition). Land …

Contrasting Roles Of Downed Wood And Leaf Litter In Structuring Aphaenogaster Ants And Other Forest-Floor Arthropod Communities, Danielle E. Dolan

Great Lakes Center Masters Theses

Forest floors are dynamic and spatially heterogenous landscapes characterized by differing amounts of light, temperature, and moisture. Bounded substrates, like downed wood and leaf litter, add further complexity to this landscape. Specifically, downed wood is noted for its ability to retain a higher moisture level than the surrounding environment, and as such can serve as an ideal microhabitat for desiccation intolerant organisms (e.g., salamanders and eusocial insects). Here, I attempt to disentangle the relationship between forest floor arthropods and microhabitat selection (i.e., downed wood vs leaf litter) on a northeastern forest floor. The ant, Aphaenogaster picea, was chosen as my …

Gaining Mussel: Evaluating Reintroduction Success Of Native Freshwater Mussels In Nebraska And Eastern Wyoming, Travis A. Moore

School of Natural Resources: Dissertations, Theses, and Student Research

Freshwater mussels are one of the most imperiled groups of organisms in North America, with over two-thirds of species considered threatened, endangered, or of special concern. These long-lived bivalves are essential to stream ecosystems, acting as filter feeders that improve water quality and as indicators of aquatic health. In Nebraska and Wyoming, native mussel populations have declined sharply due to habitat modification, pollution, and reduced connectivity. Two species of particular concern are the Plain Pocketbook Lampsilis cardium, listed as Tier I at-risk in Nebraska, and the Fatmucket Lampsilis siliquoidea, a Tier II at-risk species. In response, state agencies …

Validation Of A Real-Time Pcr Laboratory Developed Test For The Detection Of Pneumocystis Jirovecii In Bronchoalveolar Lavage Samples, Caitlyn Moon

Honors Scholar Theses

Pneumocystis jirovecii is an opportunistic, host-obligate fungal pathogen responsible for causing P. jirovecii pneumonia (PJP) in humans. PJP is treated with trimethoprim-sulfamethoxazole (TMP-SMX), a strong broad-spectrum antibiotic that carries risk of renal and hepatotoxicity. Therefore, rapid diagnosis or exclusion of PJP is crucial to ensure PJP-positive patients receive effective treatment and PJP-negative patients avoid unnecessary antibiotics. Unlike most microorganisms, P. jirovecii cannot be cultured, presenting complications for the typical methods of diagnosing fungal pathogens. Historically, the gold standard for diagnosis was direct microscopic examination with stains such as methenamine silver and calcofluor white, but this diagnostic technique requires highly skilled …

Can Carpobrotus Edulis Cause Significant Changes To The Soil Microbiome?, Samantha J. Cowan

Electronic Theses, Projects, and Dissertations

Invasive species cause significant damage to ecosystem biodiversity and can cost billions of dollars to restore native species (Van der Wal et al, 2008; Diagne et al., 2021).  In certain instances, even if the invasive species are removed, they can leave legacy effects on the environment that make restoration more challenging (Conser and Connor, 2008; Elgersma et al., 2011). Carpobrotus edulis is an invasive species of plant that is known to cause changes to its environment such as affecting the soil nitrogen cycle and the pH, potentially leading to persistent changes in the soil microbiome and causing native species to …

Of The Land And Sea: A Critical Ecocultural Analysis Of Disney's Frozen And Moana, Maggie A. Andress

Communication Undergraduate Honors Theses

Within the modern era of performative inclusivity and widespread greenwashing, it is critical to examine popular media through an ecocultural lens to determine if said media is being handled responsibly as a social practice and if a discursive atmosphere is being created. This paper takes an ecocultural critical analysis of Disney’s worlds of Frozen and Moana, inspecting their treatment of the human, treatment of the more-than-human, and human/more-than-human relationships. This study finds that although both franchises have been broadly praised for cultural representation of Indigenous people groups, Disney’s failure to effectively acknowledge the intrinsic relationship between humankind and the …

The Effect Of Temperature And Hydroperiod On Rotifer Hatching Diversity And Phenology In Ephemeral Playas, Brent Samuel Hogue

Open Access Theses & Dissertations

As climate continues to change, weather events such as heat waves and precipitation are expected to become more extreme, and organisms living in these ephemeral habitats will experience unprecedented conditions that may test their limits. However, some organisms that live in these habitats are adapted for resiliency in the face of fluctuating conditions. The focal taxa of this study are rotifers, which have the ability to produce diapausing eggs, that are stored in sediment egg banks. Diapausing eggs will hatch once suitable conditions occur in the habitat, while the rest remain stored in the sediment. This strategy assists in the …

Old-Growth Surveys And Landowner Outreach In The Cross Timbers Of Oklahoma, Jon Webb

Graduate Theses and Dissertations

The Cross Timbers ecoregion represents a critical ecologic transition zone, spanning approximately 17 million acres across Oklahoma, Texas, Kansas, and Arkansas. Situated between eastern deciduous forests and the southern Great Plains, the Cross Timbers are dominated by drought-tolerant post oak (Quercus stellata) and blackjack oak (Quercus marilandica). Despite retaining some of the most extensive old-growth forests in the eastern United States, this ecoregion remains threatened by urban expansion, agricultural conversion, altered fire regimes, and eastern red cedar (Juniperus virginiana) encroachment. This project sought to identify, survey, and document large, previously un-surveyed or unreported tracts of old-growth Cross Timbers in Oklahoma, …

Ecological Insights And Management Implications Of The Global Migratory Connectivity Of Green Turtles, Jaime Restrepo, Dina Nisthar, Harris Wei-Khang Heng, Lily K. Bentley, Corrie Curtice, Sarah Deland, Ei Fujioka, Patrick N. Halpin, Sarah K. Poulin, Roldán A. Valverde

School of Earth, Environmental, & Marine Sciences Faculty Publications

Aim

Green turtles are a widely distributed and highly migratory species; despite extensive data on their movement, there is no species-specific global synthesis on the subject. Based on three decades of published literature and building on previous global analyses, we developed a global network model of migratory connectivity for green turtles to better understand their spatial biology.

Location

Global.

Time Period

1990–2022.

Major Taxa Studied

Green Sea Turtle (Chelonia mydas).

Methods

We conducted a structured literature review extracting georeferenced information on the movement of green turtles from 1990 to 2022, aggregating this information into a single connectivity model, …

Man In The Medium: A Historical Examination Of The Life And Work Of Roger Ailes In The American Political Arena, Korey A. Bowles

Doctoral Dissertations and Projects

Roger Ailes is one of the most prolific figures in American politics and media of the last 60 or so years. Despite his many contributions and achievements, he remains relatively unknown among the public and underrepresented in the field of communication research. This study uses a critical historical approach to examine the life and influence of Ailes on the American political and media landscapes through his work with Presidents Nixon, Reagan, Bush, and numerous other key political figures, as well as the founding of Fox News Channel. In doing so, this study provides insight into Ailes’ perspective on the ecology …

Developing Green Infrastructure For Baghdad City, Najeel Kamal Abdul Razzaq, Mayasa Farkad Abdul Raheem

Iraqi Journal of Architecture and Planning

The public green spaces in Baghdad city have an obvious shortage and doesn’t fulfill and meet the needs of the population and the required open space criteria, moreover these green spaces are disjointed, disconnected and does not function as a unified system, that is why it suffers from neglect which contributes to deterioration of the city’s environment and increasing air pollution. Human beings depended on nature into providing clean air and good health, with the growth of the population and the urban areas, there has been negative influence on the natural environmental system. A new term lately appeared “Green Infrastructure”especially …

Spatial Distribution Patterns Of Determinants Of Hypertension In West Java In 2023, Meirina Nur Asih Susanti, Wahyu Septiono

Preventia: The Indonesian Journal of Public Health

Hypertension is a public health issue that is unevenly distributed across regions. The high prevalence in West Java (34.4%) with a large population makes the management of hypertension crucial. Differences in economic and environmental conditions are thought to influence the distribution of hypertension, thus requiring spatial analysis. This study used an ecological approach by analyzing data from districts/cities in West Java in 2023. Secondary data were used to measure hypertension prevalence and to assess socioeconomic and environmental factors. The analysis was conducted using univariate Moran's Index, Local Indicators of Spatial Association (LISA), and the Spatial Autoregressive Model (SAR). The prevalence …

National Trends And State-Level Correlates Of Medications For Opioid Use Disorder Utilization Among Treatment Admissions In The United States, 2014-2023, Prince Osei Sarpong, Emmanuel Owusu, Manasvi Shiyani, Michael Ago Tetteh, Naa Komley Commey

Liberty University Research Week

Background: Medications for opioid use disorder (MOUD) reduce overdose risk and improve retention in care, yet implementation at treatment entry remains uneven across the United States. Study objectives and hypotheses: To examine national and state-level patterns in MOUD use at treatment admission from 2014 through 2023 and to identify state-year characteristics associated with higher utilization. We hypothesized that MOUD use would vary substantially across states and would be lower in state years with greater structural disadvantage.

Methods: A repeated cross-sectional ecological study was conducted using the Treatment Episode Data Set-Admissions public use file. The analytic sample included adult admissions from …

2026 Conference Program, Georgia Southern University

GS4 Student Scholars Symposium

Conference Program

Evaluating Sexual Dimorphism In An Urban Neonate Regina Septemvittata Population, Arleigh Wagoner, Nathan Wilkins

Liberty University Research Week

Regina septemvittata, commonly known as Queensnakes, are broadly distributed across eastern and central North America. In adult Queensnakes, females average a greater snout-vent length (SVL) than males. Since Queensnakes exhibit size dimorphism and have short life spans and low survival rates, it was hypothesized that neonate Queensnakes begin to display a distinct sex-related difference in SVL within their first few months of life. Our study investigated growth rates of neonate Queensnakes by conducting a capture-mark-recapture (CMR) study over a three-month period (August through October; birth to first brumation) in an urban stream in Lynchburg, VA. Captured snakes were measured (SVL), …

National Trends And State-Level Correlates Of Medications For Opioid Use Disorder Utilization Among Treatment Admissions In The United States, 2014-2023, Prince Osei Sarpong, Emmanuel Owusu, Manasvi Shiyani, Michael Ago Tetteh, Naa Komley Commey

Liberty University Research Week

Background: Medications for opioid use disorder (MOUD) reduce overdose risk and improve retention in care, yet implementation at treatment entry remains uneven across the United States. Study objectives and hypotheses: To examine national and state-level patterns in MOUD use at treatment admission from 2014 through 2023 and to identify state-year characteristics associated with higher utilization. We hypothesized that MOUD use would vary substantially across states and would be lower in state years with greater structural disadvantage.

Methods: A repeated cross-sectional ecological study was conducted using the Treatment Episode Data Set-Admissions public use file. The analytic sample included adult admissions from …

2026 Conference Program, Georgia Southern University

GS4 Student Scholars Symposium

Conference Program

Investigating The Intra-Host Relationships Of The Microbiota At Multiple Sites, Ariel Jose Hernandez-Leyva

Arts & Sciences Graduate Student Theses and Dissertations

The human body hosts an abundance of microbial communities that, through complex and multi-faceted interactions, interface with host physiology and help govern health and disease. Many of these interactions are beneficial and help maintain host homeostasis or contribute to the metabolic capacity of the host. Some are detrimental, potentially inducing or further exacerbating disease. All are complicated by the vast diversity of microbes that comprise the microbiota at any given site. Identifying microbes or microbial functions that influence health and disease for study and potential use as biomarkers is tantalizing, though difficult. The vast diversity of potential community compositions, redundancy …

Using Geospatial Environmental And Income Variables As Predictors Of Diabetes In Appalachia, John Kunicki Huth

Walden Dissertations and Doctoral Studies

Diabetes remains disproportionately prevalent in Appalachia, and macroenvironmental contributors remain poorly understood. Guided by spatial epidemiology, this quantitative, cross-sectional ecological study examined whether county-level environmental factors including distance to mine, distance to landfill, distance to water, mean annual precipitation, mean annual temperature, forest classification, distance to impervious surface, and median income were independently and collectively associated with diabetes cases per capita in West Virginia, used as a surrogate for Appalachia. Research questions addressed environmental predictors of diabetes cases per capita with and without controlling for median income. Publicly available county-level data from 53 West Virginia counties representing adults aged 20 …

Swosu Research And Scholarly Activity Fair 2026, Swosu Office Of Sponsored Programs

SWOSU Research and Scholarly Activity Fair Programs

On behalf of the University Research and Scholarly Activity Committee (URSAC) and the Office of Sponsored Programs (OSP) at Southwestern Oklahoma State University, we are pleased to welcome you to the Thirty-Fourth SWOSU Research and Scholarly Activity Fair.