Biodiversity Commons^™

Biochemical Characterization Of Luciferase In Omphalotus Olearius, James H. Martin

Honors Theses

The overall goal of this thesis was to investigate the genetic basis of bioluminescence in Omphalotus olearius, a bioluminescent mushroom. The project initially focused on growing fungal cultures under controlled laboratory conditions and using molecular techniques such as DNA extraction, PCR, and gel electrophoresis to identify the organism and isolate the gene responsible for light production. The main objective was to insert this gene into a bacterial system to confirm its function through observable bioluminescence. However, repeated difficulties in maintaining viable fungal cultures and errors in molecular procedures resulted in inconclusive results, preventing successful gene identification. Due to these …

Exploring Microbiome Communities Of Two Belize Coral Species Five Years After Reciprocal Transplant, Lily E. Kratz

Biology Honors Papers

Coral holobionts, which include the coral animal host, dinoflagellate algae, bacteria, etc., support coral reef biodiversity by providing habitat to many marine species. In the face of global change, identifying and understanding the microbial diversity of corals is extremely important because their survival indicates overall ocean health. Coral-associated bacterial and algal communities contribute to the health and survival of a coral species through creating resistance to stressors and supplying essential nutrients. As coral reef environments continue to change, microbial communities must respond to ensure the survival of reef-building corals. To investigate if coral microbiomes possess the ability to acclimatize to …

Ecological Responses To Living Shoreline Restoration, Aaron S. Bland

Graduate Theses and Dissertations (2019 - present)

Coastal built communities and natural coastal ecosystems face similar and interrelated hazards: shoreline sediment erosion, shoreline retreat, and worsening storms, each of which is exacerbated by relative sea level rise. Living shorelines are coastal defense projects that incorporate natural habitats to provide more sustainable shoreline defense and improve the coastal ecosystem. Living shorelines have been widely adopted, but their performance has been highly variable, and the mechanisms of project success and failure are unclear. The overarching goal of this dissertation was to better understand the ecosystem responses to coastal restoration, focusing on the primary habitats of coastal salt marsh and …

Investigating The Taxonomic Uncertainties Of Potentilla Rupincola, Natalie Elizabeth Hieber

Master's Theses

Landscape stewardship is an integral role for land managers that becomes more important when rare or endangered species occur within managed areas. Conservation across the landscape is a primary concern for land managers, but resources allocated for conservation can be limited due to many competing goals. Taxonomic uncertainty surrounding rare and endangered taxa, particularly plant taxa, that have historically been classified solely using morphological features further complicates conservation planning. One such taxon is Potentilla rupincola, a rare plant endemic to the eastern Rocky Mountains in Colorado. For over a century, botanists have debated whether P. rupincola is a distinct species …

Preserving The Past: Exploring The Last Frontier's Ecosystem Shifts And Biodiversity Of The Tallgrass Prairies, Gisell Maldonado, Amelia Villaseñor

Anthropology Undergraduate Honors Theses

In North America, grasslands are a cornerstone of the environment. Historically, the tallgrass prairie was expansive and reached from Manitoba in Canada to Texas. Today this unique ecosystem is highly fragmented and reduced, but it remains an important ecosystem for biodiversity and cattle management. While there are many complex ecological interactions in the prairie, recent research shows that large herbivores are vital in maintaining grasslands through grazing and other behaviors that reduce woody encroachment and support nutrient cycling. Here, we examine cow and bison dietary behaviors and connect these to the ecosystem services provided by these large herbivores. In the …

The Hitchhiker's Guide To The Host: Fleas And The History Of Pikas In North America, Josh Pletcher

All NMU Master's Theses

Parasite phylogenetics can offer windows into the cryptic evolutionary history of hosts, often highlighting events that are not recorded by the phylogenetics of the host. Pikas (small lagomorphs) host a diverse parasite community comprising endoparasites (e.g., coccidians, nematodes, and cestodes) and ectoparasites (e.g., fleas and mites). Phylogenetic analysis of pika endoparasites has revealed pikas evolved in Asia and colonized North America in two waves, and that contact between these two pika lineages allowed parasites to be transferred from one lineage to another and to survive the extinction of their original host. To uncover these cryptic histories, understanding the biogeography of …

Mammalian Biodiversity Of The Easley Conservation Stewardship Area, Grayson C. Belt

Honors College Theses

Monitoring wildlife is an important part of conservation and is particularly vital for newly acquired conservation areas to provide a baseline of what is present. In 2025, the 22 ha Murray State University Easley Conservation Stewardship Area (MSU ECSA) was established following a donation to the university by Melissa Easley. I conducted a survey using trail cameras at the ECSA in fall 2025 and winter 2025/26 to record mammalian diversity. The survey consisted of two subprojects: a mesomammal subproject of 18 knee height trail cams and a small mammal subproject using 15 custom small mammal bucket cameras. I uploaded all …

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 …

Forest Overstory Mortality & Recruitment Patterns Eight Years Following Wildfire In The Southern Appalachians, Ruth Cumberland

All Theses

In this study, we investigated patterns of forest overstory mortality and recruitment eight years after wildfire in a large wildfire site the Southern Appalachians, a topic that has not been thoroughly investigated to date. With evidence that pre-fire drought promotes post-fire mortality through impaired physiological function and increased fuel consumption, unknown patterns following wildfire are important to study under shifting climate and land-use conditions. In Chapter 1, three areas of interest were investigated: (a) functional group mortality response to wildfire effects, (b) temporal differences in early (1-3 years) and late (5-8 years) periods of delayed forest overstory mortality patterns following …

Comparative Biomechanics: Blattodea Antennal Morphology And Physiology, Lucas W. Marsh

All Theses

Equipped with muscle-free antennae, many insects can twist and bend their antennae on demand. We hypothesized that hemolymph circulating through the antennae provides pressure that facilitates twisting and bending and provides a feedback control channel for tactile sensing in insects. To test this hypothesis, we conducted a thorough morphological and physiological analysis of antennae in three Clades of Blattodea. We studied morphology by evaluating the distinguishable features of the body and antenna, as well as the internal structure of the antennal lumen. Then, in a series of experiments on live cockroaches, we measured blood pressure along the antenna. This was …

Developing Aero-Floating Treatment Wetland (Aeroftw) Scaffolds: A Non-Plastic Alternative To Conventional Plastic-Based Ftws, Ada C. Montoya Gomez

All Theses

This research was conducted to explore the possibility of constructing floating treatment wetlands (FTWs) without using plastic materials. FTWs are floating platforms that hold plants on the water’s surface, letting roots dangle within the water column, to help remove contaminants from contaminated water, especially in stormwater ponds. Many conventional FTWs are made with plastic components, such as mats and plastic cup containers, which can release microplastics into the environment over time. The goal of this project was to design and test a new type of FTW that does not depend on plastics to support FTW flotation. The study took place …

Cultivating Curiosity Across Academic Audiences: Biology And Evidence-Based Science Communication, Nathan D. Forbes

Whittier Scholars Program

Effective Science Communicators must speak to a variety of audiences, with varying quantities of prior interest and qualities of background knowledge. The purpose of this paper was to engage differing audiences in scientific learning. This was done through a hypothetical newsletter made up for four different segments exploring a variety of topics in biology. Each segment intends to speak to a different audience with a different level of interest and/or educational level. Simplifying or analogizing without sacrificing the statistical basis of this project was of paramount importance. In the two segments targeted towards younger audiences, the primary focus was on …

An Integrative Description Of Euscorpius Diagorasi Sp. N. From Rhodes, Greece (Scorpiones: Euscorpiidae), Konstantinos Kalaentzis, Francesco Frigioni, Eliza Kaitetzidou, Alessio Iannucci, Alexandros Triantafyllidis

Euscorpius

The genus Euscorpius Thorell, 1876 comprises a diverse and taxonomically challenging group of scorpions in the Mediterranean, with Greece representing one of its principal centers of diversity. In this study, we provide an integrative description of Euscorpius diagorasi sp. n., a new species from Rhodes Island, Greece. The new species is described on the basis of adult male and female morphology and mitochondrial COI sequence data. It is a small oligotrichous species characterized by a total length of approximately 21–25 mm, pale yellow to light brown coloration with darker reddish-brown pedipalps, pectinal tooth count of 8 in the male …

Grassland Bird Community Responses To Fire Management, Mason H. Dillard

ATU Scholars Symposium

Vegetation structure plays a major role in determining avian community makeup. Controlled burn frequency changes vegetation structure and consequently the makeup of avian communities. To examine this relationship, I surveyed breeding birds in grasslands and savannahs of the Ozark Mountains, Arkansas River Valley, and Northwest Arkansas. I created models to outline the relationship between these three factors (avian community, fire management, and vegetation structure.) I also examined surrounding land cover and patch size as potential variables that may impact avian community structures.

I will outline the role fire management plays in determining the makeup of breeding bird communities in grasslands, …

Fish Community Assessment Of Goose Pond Natural Area, Macy Sparks

ATU Scholars Symposium

Natural areas play an integral role in the preservation and conservation of unique ecosystems (i.e., natural wetlands). However, many natural areas have never had a biological inventory of species utilizing these areas. Goose Pond Natural Area (Conway County and Pope County, Arkansas) is one of those natural areas lacking species occurrence data. We addressed this data gap by sampling fish species across multiple habitat types (shallow woody wetland, open grassy wetland, and stream). We employed multiple gear types (mesh umbrella minnow traps, seines, gill nets, mini-fyke nets, and backpack electrofishing) in hopes of increasing species detection. Sites within the natural …

The Effects Of Sun Exposure On The Intensity And Distribution Of Salamander Biofluorescence, Julianne Chairez

Scholars Week

Salamanders have been used in a variety of different experiments to  determine the health of various ecosystems. Biofluorescence was recently studied in  amphibians in a study done in 2020. Not much is known about all its functions,  more studies are needed to fully understand how it works and how it can be affected  by environmental factors. Learning more about the functions of salamander  biofluorescence could lead to a greater understanding of how pollutants and human  impacts can affect salamanders and the health of their ecosystems. This project  aims to focus on tiger salamander biofluorescence and how its distribution and  intensity …

An Overview Of Herpetofauna Surveys At Fort Leavenworth Military Reserve., Zane Smith, Sandra Guzman-Duran

SACAD: Scholarly Activities

Herpetofauna surveys focused on Crayfish Frog, Spring Peeper, Eastern Tiger Salamander, Red-Bellied Snake, and Smooth Earth Snake were conducted concurrently with Bush Honeysuckle removal projects on the Fort Leavenworth Military Reservation.  Survey techniques included coverboard arrays, adaptive hunt drift fences, traditional pit fall traps and visual encounter surveys and were conducted between May and August in 2024 and 2025. The survey effort resulted in the detection of one of the target species, the Smooth Earth Snake. Based on our survey results we are confident that the Crayfish frog and Spring Peeper do not occur on Fort Leavenworth Military Reserve, but …

Storm-Drains As Ecosystems, Victoria E. Kennedy, Curtis Jang, Darlene Panvini

SPARK Symposium Presentations

Stormwater drains and culverts are installed across urban spaces to direct surface water and allow for proper drainage and prevent flooding and erosion. These structures and the water that they carry can provide unintended opportunities to wildlife. Previous research has shown that local ecosystems may utilize and adapt around these culverts in many ways. They can serve as habitats, connect fragmented habitats separated by roads or human traffic, serve as drinking spots, and promote biodiverse plant growth. This project aims to analyze these often-overlooked spaces as ecosystems themselves, so that we can learn more about their impact and significance.    Key …

Testing The Intermediate Disturbance Hypothesis On Anthropogenic Pressure In Central Alabama, Gavin Terrell

Theses

Biodiversity is fundamental to maintaining ecosystem structure and function globally. Prior to the late 20th century, ecological theory generally predicted that biodiversity would be highest in systems experiencing minimal disturbance. However, Joseph H. Connell challenged this view with the Intermediate Disturbance Hypothesis (IDH), which posits that species diversity peaks at intermediate levels of disturbance and declines under conditions of both low and high disturbance. Although widely cited, the applicability of the IDH to natural systems remains debated, particularly in the context of anthropogenic disturbances and when diversity is measured beyond species richness alone.

This study evaluated the predictions of the …

Enhancing Urban Garden Capacity By Linking Biodiversity And Ecosystem Function, Mary T. Nguyen, Carleen Rauh, Shelby Gresch, Charlotte Correiro, Heidi Elmendorf, Adriane Fugh-Berman, Gina Wimp, Alexandra L. Decandia

Virginia Journal of Science

Urban agriculture broadly describes food and plant cultivation in metropolitan areas. While biodiversity is thought to support ecosystem health and resilience, the relationship between above-ground and below-ground diversity has been understudied in urban green spaces. This study examines plant, animal, bacterial, and fungal diversity across three distinct urban habitats: a turf lawn, a forb garden, and a farming space. Using bacterial 16S rRNA and fungal ITS2 sequencing, soil nutrient analyses, and surveys of vegetation and wildlife, we connect diverse philosophies in urban agriculture to their role in advancing community diversity and ecosystem function. We found that different urban gardens support …