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The Transition Zone Hypothesis On Biodiversity Of The Indian River Lagoon System, Florida, Richard L. Turner

Ocean Engineering and Marine Sciences Faculty Publications

The Indian River Lagoon System (IRL) is regarded as having a high level of biodiversity. The level of biodiversity is often attributed in part to the 2-degree latitudinal span (251 km) of the IRL and to its position in a transitional zone between tropical and temperate biotic provinces. This hypothesis was tested for submerged aquatic vegetation (SAV) based on a recent treatise (Littler, Littler, and Hanisak, 2008). Five of seven species of seagrass are tropical, and two have either a broad or very narrow latitudinal distribution; the transition-zone hypothesis does not hold for seagrasses. Most macroalgae (131 spp.) are tropical/subtropical; …

Impacts Of Halophila Stipulacea Invasion On Organic Matter Dynamics In Thalassia Testudinum Dominated Seagrass Meadows, Puerto Rico, Jonathan D. Herald

Master's Theses

Halophila stipulacea (Forsskål & Niebuhr) is a tropical seagrass native to the Red Sea, Persian Gulf, and Indian Ocean. In 2002, invasive populations of H. stipulacea were identified in the Caribbean Sea where it now forms large meadows, displaces native seagrasses, alters invertebrate and fish communities, and potentially affects organic matter dynamics in invaded meadows. This study investigated differences in organic matter dynamics between meadows of H. stipulacea and native Thalassia testudinum within the Jobos Bay National Estuarine Research Reserve (JBNERR) on the southern coast of Puerto Rico. From March 2023-March 2024, sampling was conducted across four sites to investigate …

Effects Of Urbanization On The Population Genetics And Morphology Of The White-Footed Mouse (Peromyscus Leucopus) Across An Urban–Rural Gradient, Sydney A. Morton

Master's Theses

Urbanization alters landscapes in ways that can reshape wildlife populations by changing habitat connectivity, resource availability, and selective pressures. To investigate how urbanization influences both genetic differentiation and morphology in small mammals, I examined Peromyscus leucopus (PELE) across an urban–rural gradient in northern Georgia. Using RADseq SNP data from PELE individuals across 13 sites, I quantified pairwise genetic differentiation (F_ST) and tested how various environmental variables, including impervious surface cover, human population density, and tree canopy cover, predict genetic differentiation after accounting for geographic distance. Genetic differentiation increased with geographic distance and, after controlling for isolation by …

Requirement Of Prepiilin Peptidase Activity For Variovorax Paradoxus Eps Flp/Fap Pilus Assembly, Jenny L. Lanthripp

Electronic Theses, Projects, and Dissertations

Variovorax paradoxus is a Gram-negative aerobic bacterium present in both soil and the human oral microbiome. This species contributes to biotransformation of xenobiotics and promotes plant growth. Interestingly, although the genome of strain EPS lacks the flagellum operon annotated in strain S110, the microbe remains motile, and flagella can be observed microscopically. To investigate this unexpected phenotype, motility mutants were enriched from a Tn5 mutant library using a liquid culture settling strategy. A total of 122 isolates were screened for motility defects, and 57 exhibited significantly reduced motility compared to the wild type. Rescue cloning revealed that over 60% of …

Exploring Life History Trade-Offs In The Facultative Eusocial Bee Megalopta Genalis, Ana Gutiérrez Zuluaga

All Graduate Theses and Dissertations, Fall 2023 to Present

Organisms face many trade-offs in how to invest in these traits. One example is the trade-off between reproduction and longevity. Queens of social insects seem to escape this trade-off, producing thousands of eggs daily, despite having a longer lifespan than their workers. Some hypotheses have been proposed to explain this phenomenon, such as an evolutionary change in the molecular pathways that regulate queen investment in maintenance, growth, and reproduction. An alternative hypothesis suggests that the tradeoffs are rarely observed in queens due to the extensive resources provided by the help of workers. While these hypotheses have supporting evidence, they have …

From Mechanisms To Management: Implications Of Biogeochemical Controllers And Land Management For Soil Carbon Cycling And Storage, Savannah R. Adkins

All Graduate Theses and Dissertations, Fall 2023 to Present

Climate change and its cascading effects are driven by increases in atmospheric carbon dioxide (CO₂). Many climate solutions exists to remove this excess carbon (C) from the atmosphere, and soils, in particular, represent one of the few win-win solutions. Soils play a vital role in the global C cycle because they store more C than plants and the atmosphere combined, however, they also release more CO₂ annually than fossil fuel combustion (a major contributor to accelerating climate change). Therefore, preventing CO₂ loss from soil could help slow the progression of climate change, and increasing overall soil …

Biocontrol Of Canada Thistle (Cirsium Arvense) With The Rust Fungus, Puccinia Punctiformis In The Intermountain West: Integrated Weed Management Compatibility And Characterization Of Microbiome Associations, Caitlin Henderson

All Graduate Theses and Dissertations, Fall 2023 to Present

Canada thistle (Cirsium arvense) is an invasive weed of major concern in both agricultural and native areas. It competes against native plants, reduces crop production and quality, and causes significant costs in management and damages. Canada thistle can survive and spread through seeds, but primarily does so through its extensive root system, which causes the greatest management difficulties. There are several control methods for this invasive weed, herbicides are perhaps the most common and effective, however, they have limitations and negative consequences. Herbicide use near waterways is restricted and there are growing concerns of the development of herbicide …

Investigating Pyrethroid Insecticide Resistance In The Alfalfa Pest Insects Hypera Postica (Alfalfa Weevil) And Lygus Spp. (Lygus Bugs) In Utah Alfalfa Fields, Rosalie Sepesy

All Graduate Theses and Dissertations, Fall 2023 to Present

Chemical insecticides are commonly used to manage the damage to crops caused by agricultural pest insects. Reliance on insecticides for pest management has resulted in insecticide resistance in many insect species worldwide. Alfalfa weevils (Hypera postica) and lygus bugs (species within the genus, Lygus), are major pests to alfalfa hay and seed respectively and cause significant economic damage. The goal of this dissertation was screen Utah alfalfa fields for resistant alfalfa weevil and lygus bug populations, investigate genetic mutations that can influence resistance in alfalfa weevils, and establish which species of lygus bugs are present in Utah …

Modeling The Deleterious Effects Of An Endogenously Generated Apolipoprotein-E4 Fragment In Transgenic Zebrafish, Emily Egan

Boise State University Theses and Dissertations

Harboring the apolipoprotein E4 allele (APOE4) is the strongest genetic risk factor for late-onset Alzheimer’s disease, yet the mechanisms by which the expressed protein contributes to neurodegeneration remain unknown. Previous studies suggest that proteolytic cleavage of ApoE4 generates amino-terminal fragments that are neurotoxic and may drive cellular dysfunction. To investigate the deleterious effects of one such fragment, nApo_E1-151, in a living vertebrate model, we developed a transgenic zebrafish line using Tol2-mediated transgenesis to endogenously express nApo_E1-151 under the neuron-specific HuC/D promoter. This model utilizes the zebrafish’s genetic accessibility, embryo and larva transparency, and rapid development ex utero to study the …

Discovery Of Insecticidal Cyclotides From The African Plants Allexis Batangae And Allexis Obanensis, Negin Khatibi, Olivier Ndogo Eteme, Conan K. Wang, Edward K. Gilding, Ernestine Nkwengoua Zondegoumba, Michelle L. Colgrave, Yen Hua Huang, David J. Craik

Research outputs 2022 to 2026

Cyclotides are plant-derived cyclic peptides recognized for their crucial role in host defense against insects and fungal pathogens. They are characterized by an ultra-stable head-to-tail cyclic backbone and a cystine knot formed by three conserved disulfide bonds, and are considered to be a promising group of molecules for a diverse array of agricultural and pharmaceutical applications. Cyclotides have been identified in five major plant families, with the Violaceae being a particularly rich source. Although cyclotides are ubiquitous in the Violaceae, many genera within this family remain unexplored. In the current study, the presence of cyclotides in Allexis batangae and Allexis …

Live And Let Fly: Assessing Threats To California Condors, Molly Astell

Boise State University Theses and Dissertations

California condors (Gymnogyps californianus) are a critically endangered species that face threats, both anthropogenic and natural, that slow recovery of their population. The leading causes of death of condors are lead toxicosis, predation, trauma, fire, and collision and electrocution at power lines. As a long-lived and slow-maturing species, each death is consequential and understanding when and where threats occur can greatly benefit management and mitigation. Although the focus of extensive mitigation efforts, lead toxicosis remains the leading cause of death for condors. There has been less effort dedicated to addressing the second-leading anthropogenic threat, interactions with power lines. Such efforts …

Decomposition Processes And Insect Indicators In Forensic Investigations, Eli Taylor

University Honors Theses

Insects play an essential biological and ecological role in human life, and their predictable relationship with decomposing remains has positioned them as a cornerstone of modern forensic science. Since the early 20th century, forensic entomology has provided critical evidence for estimating the postmortem interval (PMI), relying on patterns of colonization, species succession, and insect developmental timelines. Accurate PMI estimations are vital to medicolegal investigations, influencing the interpretation of biological evidence, guiding resource allocation, and informing determinations of cause and manner of death. However, insect activity is profoundly shaped by environmental and ecological variables, including temperature, humidity, seasonal shifts, and geographic …

The Tamads2-Tatbl21 Module Enhances Wheat Resistance To Stripe Rust By Activating Tagkl-Mediated Immunity, Shijia Zhao, Hao Chu, Yanan Lu, Jiaqi Chen, Xu Wang, Guangxiang Tian, Mingjing Zhang, Pengyu Song, Yanhui Zhang, Guihua Bai, Gangming Zhan, Zhensheng Kang, Wenming Zheng, Zhengqing Fu, Na Liu

Faculty Publications

Wheat stripe rust (Puccinia striiformis f. sp. tritici, Pst) poses a catastrophic threat to global food security. While MADS-box transcription factors regulate development and abiotic stress, their roles in plant-pathogen immunity remain enigmatic. In this study, we identified TaMADS2, a Pst-induced MADS-box gene, as a positive regulator of wheat resistance. Functional analyses demonstrated that TaMADS2 overexpression significantly enhanced Pst resistance, whereas its knockdown rendered wheat more susceptible. Further investigation revealed that TaMADS2 interacts with trichome birefringence-like protein 21 (TaTBL21) to activate glycerol kinase-like (TaGKL) expression. Silencing TaGKL in wild-type or TaMADS2-overexpressing lines …

Red Midge Larvae Are An Invertebrate Alternative Diet To Beef Liver For Planarian Husbandry, Jonah Pacis , '25, Danielle Ireland, Evangeline Coffinas, Jerome Sheehan, Kate Sun , '27, Eva-Maria S. Collins

Biology Faculty Works

Freshwater planarians are an emerging model for toxicology and neuroscience because of their amenability to rapid behavioral screening and remarkable ability to regenerate a cephalized nervous system. As invertebrates, planarians can help reduce the use of vertebrates in research; however, laboratories typically maintain planarians on diets of homogenized organic beef or chicken liver, raising ethical concerns with feeding a vertebrate diet. Organic liver is difficult to obtain, and preparation methods vary, introducing intra- and interlaboratory variability. Here, we show that Dugesia japonica planarians can be maintained for over a year on commercially available red midge larvae (RML), a natural prey …

Habitat Determines The Effects Of Wild Ungulate Grazing On Soils: Case Studies From The Iberian Peninsula, Jennifer Adams Krumins, Shih-Chieh Chien, Ramon Perea, Emmanuel Antonio Serrano Ferron, Elena Baraza Ruiz, The Incremento Consortium

Department of Biology Faculty Scholarship and Creative Works

Background and Aims

The bidirectional relationship between plants and their soils can be disrupted by the influence of ungulate grazers. Indeed, herbivores affect plant productivity and above-ground community structure, and plants affect soil health and below-ground community structure. However, the effects of herbivory can be subtle and challenging to address experimentally, even in the case of relatively large ungulate grazers. We attempt to resolve this paradox and experimentally test effects of ungulate grazers in two case studies on the Spanish Iberian Peninsula.

Methods

At the two locations, we experimentally enclosed red deer (Cervus elaphus) at high and hyper …

Examining The Impact Of Decreased Snowpack On The Rare Frosted Elfin Butterfly’S Host Plant, Christopher Walsh

Biology Student Scholarship

In response to climate change, Earth’s increased global temperature has caused less snowfall and earlier snowmelt in spring. These changes can alter an organism’s phenology, or timing of life history events. Such shifts in phenology may lead to mismatches between interacting species, which are correlated with a decline in the populations of host plant specialists and at-risk species. The rare frosted elfin butterfly (Callophrys irus) is listed as impaired in 5 states, and critically imperiled in 14. These host plant specialists only lay eggs on small yellow wild indigo (Baptisia tinctoria) and wild lupine (Lupinus perennis). If neither plant emerges …

The Influence Of Muskrats On The Biodiversity Of Wetlands, Emma Thornton

Biology Student Scholarship

Wetlands are one of the most productive ecosystems in the world and are home to various plant and animal species. The relationships between the species living in the wetlands keep the ecosystem functional as well as increasing biodiversity. Increased biodiversity of wetlands creates more resilient plant communities. Muskrats are ecosystem engineers, meaning that they alter their surroundings to change the quality and quantity of the available resources through behaviors related to their eating habits and their burrow construction. Muskrats are herbivores and consume large amounts of vegetation, which creates opportunities for more plant species by creating new ecological niches. In …

Antifungal Effects Of Fatty Acids On The Growth Of Ophidiomyces Ophiodiicola In A Simulated Snake Skin Environment, Krupa S. Patel, Lizbeth Delarosa, Jacey Cardenas, Thalia Rodriguez, John Niedzwiecki

Science University Research Symposium (SURS)

Emerging infectious diseases have increasingly threatened wildlife populations worldwide, with devastating impacts observed in frogs, bats, and more recently, snakes. Snake fungal disease (SFD), caused by the pathogenic fungus Ophidiomyces ophiodiicola (Oo), currently poses a serious threat to snake populations across multiple regions. Infected snakes exhibit disrupted skin shedding, rough or scaly patches, crusty sores, and ulcers that compromise their health and survival. Although the mechanisms underlying transmission and susceptibility to SFD remain unclear, the snake cutaneous microbiome is known to act as a defensive barrier, mediating interactions between the host and invading pathogens. The lipid layer is a key …

A Geothermal Amoeba Sets A New Upper Temperature Limit For Eukaryotes, H Beryl Rappaport, Natalie A. Petek-Seoane, Tomáš Tyml, Felix Mikus, Kurt Labutti, Godwin Ani, Jessica K. Niblo, Ethan Macvicar, Rachel M. Shepherd, Ignacio De La Higuera, Samuel J. Lord, Kenneth M. Stedman, Multiple Additional Authors

Center for Life in Extreme Environments Publications

The study of temperature limits has transformed our knowledge of the boundaries of life but has been largely focused on bacteria and archaea. We isolated a novel geothermal amoeba, , that divides at 63°C (145.4°F), establishing a new record for the upper temperature limit across all eukaryotes. We demonstrated cellular proliferation with growth experiments and visualized mitosis expansion microscopy. Using high-temperature live-cell imaging, we quantified movement up to 64°C. We assembled the genome of and using comparative genomics found an enrichment of genes related to proteostasis, genome stability, and sensing the external environment. Taken together, our findings challenge the current …

Single-Cell Genomics Reveals Complex Microbial And Viral Associations In Ciliates And Testate Amoebae, Frederik Schulz, Ying Yan, Agnes K. M. Weiner, Ragib Ahsan, Laura A. Katz, Tanja Woyke

Biological Sciences: Faculty Publications

Protists play important roles in nutrient cycling across ecosystems, yet the composition and function of their associated microbiomes remain poorly studied. Here, we use cultivation-independent single-cell isolation and genome-resolved metagenomics to investigate the microbiomes and viromes of more than 100 uncultivated ciliates and amoebae from diverse environments. Our findings reveal unique microbiome structures and complex associations with bacterial symbionts and viruses, with stark differences between ciliates and amoebae. We recover 117 microbial genomes affiliated with known eukaryotic endosymbionts, including Holosporales, Rickettsiales, Legionellales, Chlamydiae, and Babelota, and 258 genomes linked to host-associated Patescibacteriota. Many show …

Red Snapper (Lutjanus Campechanus) Neurocranium, Gabriella K. Flora, David W. Kerstetter

All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series

No abstract provided.

Insect Apocalypse? Population Patterns Of Aquatic Macroinvertebrates Across North America, Analiese Kate Bauder

Honors Thesis

There is a common idea that there is an “insect apocalypse”, that insect populations are on a drastic decline. To test this hypothesis we took data collected by the National Ecological Observatory Network (NEON) from 2015 to 2023 and analyzed it to create a time series model depicting the population of aquatic macroinvertebrates at 34 sites across North America (Appendix 1). NEON is an NSF funded, continental-scale observation facility designed to collect long-term open-access ecological data to better understand the complexities of Earth's ecosystems and how they are changing. From this model, we defined the slope of the change in …

Great Hammerhead (Sphyrna Mokarran) Chondrocranium, Female, Nicholas Burchett, Michelle Bassali, Marissa Rosas, Rileigh Gonzalez, David W. Kerstetter

All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series

No abstract provided.

Atlantic Goliath Grouper (Epinephelus Itajara) Vertebrae, Nicholas Burchett, David W. Kerstetter, Rileigh Gonzalez, Sierra Rafacz, Ema Nagel

All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series

No abstract provided.

Hawaiian Drosophila Host Plant Preferences, Kyrus Huang, Rodomir Stark

Undergraduate Research Symposium Posters

Understanding how host plant availability influences behavior in Drosophila species provides valuable insight into ecological specialization and speciation. This study examines the effects of different host plants on the reproductive and oviposition behavior of Drosophila silvestris and Drosophila grimshawi. The primary objective of this project is to determine whether females exhibit host-plant preferences during egg-laying. A secondary aim is to assess whether sex and mating status influence host plant preference, specifically comparing male, unmated female, and mated female behavior with two host plants. To test these hypotheses, newly emerged flies were divided into three treatment groups: male-only, female-only, and mixed …

Novel Eco-Friendly Synthesis Of Coo Nps: Evaluation Of Their Diode Laser-Enhanced Inhibitory Activity Through Combined In Silico And In Vitro Approaches., Arshad Mahdi Hamad, Sahar Naji Rashid

Karbala International Journal of Modern Science

In our study, for the first time worldwide, to the best of our knowledge, cobalt oxide nanoparticles (CoO NPs) were synthesized using naringin (Nar) extracted from citrus peels. The properties of the prepared Nar-CoO NPs were studied using field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), ultraviolet-visible (UV-Vis), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy. All the test results demonstrated the efficiency and success of the nanofabrication process. The solution was then exposed to three types of diode lasers: red (650 nm), green (532 nm), and blue (405 nm). The purpose of this study was …

Gdf15 Is A Putative Biomarker For Distinguishing Pulmonary Veno-Occlusive Disease And Pulmonary Arterial Hypertension, Amit Prabhakar, Eckart De Bie, Jacqueline T. Desjardin, Prajakta Ghatpande, Stefan Gräf, Luke S. Howard, S. John Wort, Colin Church, David G. Kiely, Uk Pulmonary Arterial Hypertension Cohort Study Consortium, Emily Sumpena, Thin Aung, Shenrae Carter, Jasleen Kukreja, Steven Hays, John R. Greenland, Jonathan P. Singer, Michael Wax, Paul J. Wolters, Marc A. Simon, Mark Toshner, Giorgio Lagna, Akiko Hata

Biology

To the Editor: Pulmonary veno-occlusive disease (PVOD) is a rare, severe group 1 pulmonary arterial hypertension (PAH) subtype with poor survival (1). PAH-targeted vasodilators can cause life-threatening pulmonary edema in PVOD, underscoring the need for diagnostic tools to distinguish it from other PAH subtypes (1). In patients and mitomycin C–induced (MMC-induced) model animals, aberrant activation of integrated stress response (ISR) via protein kinase R (PKR) drives cardiovascular phenotypes of PVOD (2–4). Inhibition of the PKR-ISR axis, using either the PKR inhibitor C16 or the ISR inhibitor ISRIB, reverses PVOD phenotypes (2–4). Because GDF15 is a cytokine induced by the ISR …

Mahi Mahi (Coryphaena Hippurus) Neurocranium, Ameer Tolani, David W. Kerstetter

All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series

No abstract provided.

Ladyfish (Elops Saurus) Neurocranium, Kaylee M. Blanchard, David W. Kerstetter

All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series

No abstract provided.

Great Barracuda (Sphyraena Barracuda) Neurocranium, Preston J. Toutant, Tyler I. Anderson, Luke M. Mckeon, David W. Kerstetter

All Scans: Kerstetter Fisheries and Avian Ecology 3D Scan Series

No abstract provided.