Digital Commons Network^™

Probing The Relationship Of Cyanobacterial Toxins And Reactive Oxygen Species Within The Natural World, Meagan Lachelle Smith

Theses and Dissertations

The occurrence of harmful algal blooms (HABs) and their impacts on human health and the economy are only expected to worsen in the coming years, mainly due to climate change related factors. In Lake Wateree, SC, a HAB of the species Lyngbya wollei, has been persistent for more than 10 years and is estimated to occupy 60 - 90 km of shoreline. This natural laboratory provided and continues to provide a unique window into the chemistry and microbial ecology of HABs. Work in this dissertation was directed at answering a critical question: are biomass-to-toxin ratios constant in HABs? Initial …

Applying Science To Pressing Conservation Needs For Penguins, P. D. Boersma, P. García Borboroglu, Natasha J. Gownaris, C. A. Bost, A. Chiaradia, S. Ellis, T. Schneider, P. J. Seddon, A. Simeone, P. N. Trathan, L. J. Waller, B. Wienecke

Environmental Studies Faculty Publications

More than half of the world's 18 penguin species are declining. We, the Steering Committee of the International Union for Conservation of Nature Species Survival Commission Penguin Specialist Group, determined that the penguin species in most critical need of conservation action are African penguin (Spheniscus demersus) , Galápagos penguin (Spheniscus mendiculus) , and Yellow‐eyed penguin (Megadyptes antipodes) . Due to small or rapidly declining populations, these species require immediate scientific collaboration and policy intervention. We also used a pairwise‐ranking approach to prioritize research and conservation needs for all penguins. Among the 12 cross‐taxa research areas we identified, we ranked quantifying …

Estimating Historical Forest Density From Land‐Survey Data: A Response To Baker And Williams (2018), Carrie R. Levine, Charles V. Cogbill, Brandon M. Collins, Andrew J. Larson, James A. Lutz, Malcolm P. North, Christina M. Restaino, Hugh D. Safford, Scott L. Stephens, John J. Battles

Wildland Resources Faculty Publications

In the Western United States, historical forest conditions are used to inform land management and ecosystem restoration goals (North et al. 2009, Stephens et al. 2016). This interest is based on the premise that historical forests were resilient to ecological disturbances (Keane et al. 2018). Researchers throughout the United States have used the General Land Office (GLO) surveys of the late 19th and early 20th centuries to estimate historical forest conditions (Bourdo 1956, Schulte and Mladenoff 2001, Cogbill et al. 2002, Paciorek et al. 2016). These surveys were conducted throughout the United States …

Epilepsy Diagnosis And Management Of Children In Kenya: Review Of Current Literature, Pauline Samia, Jane Hassell, Jessica-Anne Hudson, Symon M. Kariuki, Charles R. Newton, Jo M. Wilmshurst

Paediatrics and Child Health, East Africa

Introduction: The growing impact of non-communicable diseases in low- to middle-income countries makes epilepsy a key research priority. We evaluated peer-reviewed published literature on childhood epilepsy specific to Kenya to identify knowledge gaps and inform future priorities.

Methodology: A literature search utilizing the terms “epilepsy” OR “seizure” as exploded subject headings AND “Kenya” was conducted. Relevant databases were searched, generating 908 articles. After initial screening to remove duplications, irrelevant articles, and publications older than 15 years, 154 papers remained for full-article review, which identified 35 publications containing relevant information. Data were extracted from these reports on epidemiology, etiology, clinical features, …

Evolutionary Dynamics Of Influenza Type B In The Presence Of Vaccination: An Ecological Study, Lindsey J. Fiedler

USF Tampa Graduate Theses and Dissertations

Understanding the evolutionary dynamics of influenza type B in human hosts is a public health concern as we strive to minimize the disease burden in seasonal epidemics. Vaccination is considered the best defense against contracting influenza, and everyone over the age of 6 months is advised to get vaccinated before each season. The effect that vaccine-acquired immunity has on the evolution of influenza B remains unclear. In the U.S., vaccine-uptake is irregular across the states, and the differing coverages present an opportunity to study how vaccination influences viral evolution. This thesis analyzes the evolutionary patterns of influenza B in the …

Nrxn1 Deletion And Exposure To Methylmercury Increase Astrocyte Differentiation By Different Notch-Dependent Transcriptional Mechanisms, Marilena Raciti, Salma Jahan, Stefan Spulber, Giulia Gaudenzi, Zahra Khalajzeyqami, Mirko Conti, Britt-Marie Anderlid, Anna Falk, Ola Hermans, Sandra Ceccatelli

Centre for Regenerative Medicine & Stem Cell Research

Controversial evidence points to a possible involvement of methylmercury (MeHg) in the etiopathogenesis of autism spectrum disorders (ASD). In the present study, we used human neuroepithelial stem cells from healthy donors and from an autistic patient bearing a bi-allelic deletion in the gene encoding for NRXN1 to evaluate whether MeHg would induce cellular changes comparable to those seen in cells derived from the ASD patient. In healthy cells, a subcytotoxic concentration of MeHg enhanced astroglial differentiation similarly to what observed in the diseased cells (N1), as shown by the number of GFAP positive cells and immunofluorescence signal intensity. In both …

One-Time Nitrogen Fertilization Shifts Switchgrass Soil Microbiomes Within A Context Of Larger Spatial And Temporal Variation, Huaihai Chen, Zamin K. Yang, Dan Yip, Reese H. Morris, Steven J. Lebreux, Melissa A. Cregger, Dawn M. Klingeman, Dafeng Hui, Robert L. Hettich, Steven W. Wilhelm, Gangsheng Wang, Frank E. Löffler, Christopher W. Schadt

Biology Faculty Research

Soil microbiome responses to short-term nitrogen (N) inputs remain uncertain when compared with previous research that has focused on long-term fertilization responses. Here, we examined soil bacterial/archaeal and fungal communities pre- and post-N fertilization in an 8 year-old switchgrass field, in which twenty-four plots received N fertilization at three levels (0, 100, and 200 kg N ha-1 as NH4NO3) for the first time since planting. Soils were collected at two depths, 0–5 and 5–15 cm, for DNA extraction and amplicon sequencing of 16S rRNA genes and ITS regions for assessment of microbial community composition. Baseline assessments prior to fertilization revealed …

Cytochrome Oxidase I Sequences From Northern And Southern California Suggest Cryptic Baetis (Ephemeroptera: Baetidae) Species, Natalie J. Stauffer-Olsen, Patrick M. O'Grady, Vincent H. Resh

Western North American Naturalist

The geographically widespread mayfly genus Baetis occurs from the subarctic to tropical regions of the world. Many of the 20 described Baetis species in North America are known to show cryptic species diversity. However, studies of Baetis that have examined morphology and genetic diversity have found mixed results in terms of cryptic species, with some studies indicating a complex of related species and others suggesting a single widespread species. We used Bayesian analyses, intra- and interspecific genetic diversity values, and median-joining haplotype networks to compare cytochrome oxidase I (COI) sequences from Baetis specimens from parts of northern and southern California …

Physiological Diversity, Biodiversity Patterns And Global Climate Change: Testing Key Hypotheses Involving Temperature And Oxygen, John I. Spicer, Simon A. Morley, Francisco Bozinovic

School of Biological and Marine Sciences

No abstract provided.

Ocean Underwater Scene Dioramas Of First Graders With Submarine Porthole Views, Ksenia Zhbanova, Audrey C. Rule, Denise A. Tallakson

Journal of STEM Arts, Crafts, and Constructions

Ecology education of the younger generations is vital for worldwide change of people’s attitudes toward nature warranted by the current global ecological crisis. Yet, this goal needs to be addressed through age-appropriate activities that are educational and engaging. This practical article focuses on dioramas of ocean reef life made by first graders. This arts-integrated project served two main purposes: 1) education of primary students about ocean ecology and helping students realize their roles in saving nature 2) increasing student science content knowledge. Additionally, several other benefits of making dioramas emerged during this project, including highly creative student products, genuine interest …

Geographic Biases In Bee Research Limits Understanding Of Species Distribution And Response To Anthropogenic Disturbance, Mary A. Jamieson, Adrian L. Carper, Caleb J. Wilson, Virginia L. Scott, Jason Gibbs

Entomology Faculty Publications

Habitat loss and degradation due to agricultural intensification and urbanization are key threats facing wild pollinators, especially bees. However, data on the distribution and abundance of most of the world's 20,000+ bee species is lacking, making it difficult to assess the effects of anthropogenic disturbance through time. Moreover, there are geographic biases in the study of bees creating gaps in our understanding of species distributions and regional patterns of diversity. Research efforts are often focused around cities or field stations associated with universities and other research institutions. In this perspectives paper, we provide examples of geographic bias in knowledge regarding …

Influence Of Soil Water Content And Soil Amendments On Trace Metal Release And Seedling Growth In Serpentine Soil, Viraj Gunarathne, Nishanta Rajakaruna, Udaya Gunarathne, Jayanta Kumar Biswas, Zach A. Raposo, Meththika Vithanage

Biological Sciences

This study was conducted to evaluate the synergistic effects of organic amendments and soil water status on trace metal release from serpentine soil.

Illustrated Guide To The Immature Lepidoptera On Oaks In Missouri, Robert Marquis, Steven Passoa, John Lill, James Whitfield, Josiane Le Corff, Rebecca Forkner, Valerie Passoa

Biology Department Faculty Works

Oak trees (Quercus spp.) dominate many forests in North America, and their diverse herbivore fauna is a major component of ecological biodiversity. Yet, identification guides for oak-feeding Lepidoptera in the eastern United States usually lack detailed larval morphological characteristics and pupal descriptions. This book describes the immature stages of common species of butterflies and moths (Lepidoptera) whose larvae are found on 10 species of oak (Quercus) in the eastern Missouri Ozarks (USA). Data were collected mainly as part of the Missouri Ozark Forest Ecosystem Project (MOFEP), a longterm study of the effects of harvesting regimes on forest structure and function. …

Broad-Scale Habitat Use By Fledgling Black-Capped Vireo, Marisa T. Martinez, Ashley M. Long, Heather A. Mathewson, Michael L. Morrison

Faculty Publications

Knowledge of avian habitat associations during the postfledging stage is lacking for most songbirds, which limits the ability to develop and implement management plans that address the full life cycle of birds. The Black-capped Vireo (Vireo atricapilla; hereafter vireo) is a Neotropical migratory songbird that breeds in early to mid-successional vegetation but has been documented using late-successional vegetation. We used data collected in 2013 and 2014 to determine the spatial distribution of vireo fledglings in relation to the availability of woodland cover in central Texas. We found that woodland cover was used less often than it was available in the …

Intertextual Abolitionists: Frederick Douglass, Lord Byron, And The Print, Politics, And Language Of Slavery, Jake Spangler

College of Liberal Arts & Social Sciences Theses and Dissertations

t is the design of this project to suggest that Frederick Douglass' novella, "The Heroic Slave," both pulled from and was a catalyst in the field of emancipatory discourse and debate, most notably through the links between Douglass' and Byron's work found in the epigraphs to the novella. These links offered Douglass a means of harnessing past conversations on slavery. Douglass' ability to access these communicative environments is made possible due to the intertextual nature of literature. Through the use of adaptation and word play, Douglass was able to access and use a separate narrative voice from that which he …

The Function Of Crocodile Hatchling (Crocodylus Acutus) Distress Calls, June 2019, Dhiraj Ramireddy

Monteverde Institute: Tropical Ecology and Conservation

This study attempts to describe communication and behavior among Crocodylus acutus hatchlings. By understanding when and why vocalizations occur, new insight can be found regarding extant ancestors of crocodilians including dinosaurs. In Cuajiniquil, Costa Rica, I observed two Crocodylus acutus nests and captured five crocodile hatchlings. I observed the captured hatchling and its siblings recording vocalizations and movement patterns. After catching a random hatchling, it vocalized distress calls, and in response, the siblings would vocalize and approach the captive. These results support the hypothesis that a distress call of a hatchling seeks help from sibling crocodiles. An acoustical analysis displayed …

Clinical Outcomes Of A Cohort Of Migrants And Citizens Living With Human Immunodeficiency Virus In Botswana: Implications For Joint United Nation Program On Hiv And Aids 90-90-90 Targets., Tafireyi Marukutira, Dwight Yin, Laura Cressman, Ruth Kariuki, Brighid Malone, Tim Spelman, Shreshth Mawandia, Jenny H. Ledikwe, Bazghina-Werq Semo, Suzanne Crowe, Mark Stoove, Margaret Hellard, Diana Dickinson

Manuscripts, Articles, Book Chapters and Other Papers

The aim of the study was to evaluate the human immunodeficiency virus (HIV) treatment cascade and mortality in migrants and citizens living with HIV in Botswana.Retrospective 2002 to 2016 cohort study using electronic medical records from a single center managing a high migrant case load.Records for 768 migrants and 3274 citizens living with HIV were included. Maipelo Trust, a nongovernmental organization, funded care for most migrants (70%); most citizens (85%) had personal health insurance. Seventy percent of migrants and 93% of citizens had received antiretroviral therapy (ART). At study end, 44% and 27% of migrants and citizens, respectively were retained …

Haematoloechus Lung Flukes In American Bullfrogs: Prevalence And Associations Of Infection, Bethany Frantz

University Honors Theses

The prevalence and intensity of infection by lung flukes (Haematoloechus sp.) was examined by dissecting 1,590 American bullfrogs (Rana catesbeiana) collected between 2013 and 2018, from Conboy Lake National Wildlife Refuge, Washington. Overall infection, across all age classes, was 59.7% (n=1,580) and mean intensity was 17 (n=169; SD=19.3, range=1-166). A logistic regression model showed a significant relationship between infection and frog snout-to-vent length, gape, and collection year. Sex had a significant relationship to infection (χ²=7.31, df=1, P=0.007). Presence of odonates in the stomach was also significantly related to infection (χ²=22.49, df=1, P<0.001). This study expands on the current breadth of knowledge on this taxon in anurans into a previously unstudied region of the United States and emphasizes the use of odonates as secondary intermediate hosts.

The Assessment Of Predictor Variables For Hard Tick Abundance In Southwestern Missouri, Casey L. Adkins

Graduate Theses/Dissertations

The risk of tick-borne infection is increasing across the United States, and in Missouri, ticks are expanding into novel regions due to climate change, habitat fragmentation, and biodiversity loss. Regions in which ticks are encroaching experience novel vectors for lineage associated pathogens. Novel tick detection can be low due to sampling practices targeting known ticks, which can lead to unreliable distribution maps and poor predictive distribution models. Such models should account for biotic factors, abiotic factors, and their interactions to provide a dynamic view of their impact on tick abundance and identify variables that can serve as indicators. Further, a …

Alcohol Sale Status And Homicide Victimization In Kentucky, 2005-2012: Is There A Spatial Association?, Hanan Abdulghafoor Khaleel, Sabrina Brown, Steven T. Fleming, W. Jay Christian

Epidemiology and Environmental Health Faculty Publications

To date, the association between the alcohol sale status of decedents’ residence and alcohol-related homicide victimization have not been studied as far as we know. The current study aims to: i) determine whether homicide victims who were residents of wet counties had higher odds of testing positive for alcohol than their counterparts in moist or dry counties after adjusting for confounders; ii) determine whether homicides and alcohol-related homicides tend to cluster spatially; iii) determine whether the aforementioned associations exist only in highly-populated counties. A multilevel logistic regression analysis was used to analyze the data on homicide victims in the Kentucky …

Additional Thoughts On Rigor In Wildlife Science: Unappreciated Impediments, John A. Bissonette

Wildland Resources Faculty Publications

Traditionally, most scientists accepted reductionist and mechanistic approaches as the rigorous way to do science. Sells et al. (2018) recently raised the argument about reliability in wildlife science. Chamberlin (1890), Platt (1964), Romesburg (1981, 1991, 2009), and Williams (1997) were rightly referenced as very influential papers. My intention in this letter is not to refute the essence of the Sells et al. (2018) commentary but to add seldom addressed but important aspects that influence the attainment of rigor and certainty in wildlife studies. The elements of …

Dynamics Of Water, Carbon, And Nitrogen In Forest And Alpine Tundra Ecosystems In The Pacific Northwest And The Rocky Mountains Of The U.S. Under Future Climate Change, Zheng Dong

Dissertations - ALL

Projection of ecosystem functions and biogeochemical cycling of elements under future climate change requires a quantitative understanding of both ecosystem processes and site-specific climate change scenarios. Biogeochemical and ecological studies over the last decades have provided the intellectual basis for these projections, especially at the small watershed scale. Recent developments in biophysical sciences and computationally based meteorology coupled with advanced downscaling techniques have made it possible to project future climate change scenarios at the small watershed scale. Using a biogeochemical model, PnET-BGC, which has been extensively applied to the forest ecosystems in the northeastern United States, the interactive effects of …

Clinical Implications Of Evolutionary Modeling Of Cancer Progression, Kelsey Heiland

Biology: Student Scholarship & Creative Works

Evolutionary theory of cancer was developed in 1976 by cancer research Peter Nowell and has illuminated the path toward increasing safety and efficacy of clinical treatment strategies. Major foundations that makeup the complexity in Darwinian framework of cancer includes clonal evolution, clonal expansion, and competition. Due to these characteristics, virtually all types of cancer have evolutionary capabilities to reject or adapt and become resistant to pharmaceutical therapies. Despite compelling evidence of these process, evolutionary modeling of cancer continues to be underutilized in clinical settings. Contributions to this include the complex adaptive mechanisms that tools fail to detect or are unable …

Video Games, Influence, And Identification: The Perpetuation Of Culture Through Digital Worlds, Steven Zwier

Electronic Theses and Dissertations

Video games, through their widespread popularity and appeal, transmit meaningful ideas, beliefs, and attitudes via the use of digital worlds, narratives, characters, and play. Play has always held a key role in human life, but the video game medium accentuates and accelerates the reach and impact of play on human users. Jacques Ellul’s philosophy of social propaganda and Kenneth Burke’s rhetorical theory each offer important implications to the persuasiveness of video games; however, when placed in conversation with one another, the union of Ellul and Burke leads to a more complete understanding of how video games have such an effect …

When Humanity Meets Technology: Contemplating Neil Postman's Critique Of Advertising, Yingwen Wang

Electronic Theses and Dissertations

This project aims to contemplate Postman’s critique of advertising and offer insights to understand Integrated Marketing Communication (IMC) in today’s mediated environment. As an essential component of IMC, the history of advertising demonstrates and documents that the medium of communication has an extensive influence on IMC practices. The concern about how communication media affect human perception, understanding, and behavior, resides within the central claim of the study of media ecology. Thus, this project investigates IMC through the lens of Postman’s media ecology perspectives, and argues that Postman’s prescient ideas provide both hope and constructive insights. Moreover, Postman’s thermostatic perspective, rooted …

The Postman Always Rings Twice: Neil Postman's Views On Education Are Relevant Again In The 21st Century Classroom, Jennifer Spiegel

Electronic Theses and Dissertations

The public education system in America has long been criticized for its inability to prepare students for success as adults. While some engage in a narrative of blame, others ask what can be done to solve this problem. This dissertation examines a narrative crisis in the 21^stcentury classroom through the lens of Neil Postman, a 20^thcentury media ecologist whose fears about television may finally be realized with the advent of the personal digital device and its impact on the educational sphere. First the past narratives that guided the American school system will be traced from colonial …

Adult Whooping Crane (Grus Americana) Consumption Of Juvenile Channel Catfish (Ictalurus Punctatus) During The Avian Spring Migration In The Central Platte River Valley, Nebraska, Usa, Andrew J. Caven, Jenna Malzahn, Keith D. Koupal, Emma M. Brinley Buckley, Joshua D. Wiese, Rick Rasmussen, Carol Steenson

Monographs of the Western North American Naturalist

Stopover sites provide important forage resources and protection from predators to the Aransas-Wood Buffalo population of Whooping Cranes (Grus americana) as they migrate 4000 km across the Great Plains each spring and fall. Given the Whooping Crane’s expansive migration corridor, sensitivity to human disturbance, small population size, and protected status under the Endangered Species Act, it is challenging to gather detailed information regarding the particular forage resources that the cranes exploit at various stopover locations. On 22 March 2018 we observed and photo-documented an adult Whooping Crane consuming at least 5 individual juvenile channel catfish (Ictalurus punctatus …

American And British Speech Differences In Low Socioeconomic Status Homes, Jennifer Markfeld

Senior Honors Projects, 2010-2019

Background: Infants living in low socioeconomic status (SES) homes display lower developmental functioning by 12 months than mid- and high-SES infants, and speak fewer words on average as they grow older. Maternal speech is especially important for language development and has been found to be the largest predictor of SES-related differences in children’s vocabulary. Although there are documented differences between British and American infant language development, for example American infant lexicons are typically larger than age matched British infants, there is little research looking at caregiver speech across these countries in low SES groups.

Method: This retrospective study compared 10 …

Community-Based Healthcare | Interlace Of Biophilic Design In Outpatient Facilities, Joshua Robinson

Bachelor of Architecture Theses - 5th Year

This thesis questions how architects can redesign typical healthcare typology in response to the medical and sociological needs of the community while integrating the measures of wellness and biophilic design. By redefining architectural programs within a wellness clinic, this can allow the facility to prioritize the communities needs through non-medical determinants. The research will look at both the social and medical needs of a community, along with the Seven Standards of Wellness as defined by the Well Building Standard and The Fourteen Patterns of Biophilic Design as defined by the Terrapin Bright Green, to develop a connection between the facility …

Headspace: Architecture For Mental Health, Courtney Wise

Bachelor of Architecture Theses - 5th Year

This thesis proposes a mental wellness center that will act as a free resource for mental health services, specifically anxiety and depression. The goal of this project is to create a resource that will help mitigate the ignorance around mental health by educating the public, creating opportunities for positive social interaction, and giving the scholastic and residential communities a safe place to examine their individual mental health. This will be accomplished by finding mediators between clinical and non-clinical types of program.