Digital Commons Network^™

Grazed Pasture Effects On Greenhouse Gas Emissions In The Ozark Highlands, Tyler Buchanan

Graduate Theses and Dissertations

In the United States (US), grazinglands serve as the main foundation for the livestock industry, and, in Arkansas specifically, pastures are essential for rotational grazing and dairy operations. Climate change is increasingly becoming a concern in the agriculture industry, largely caused by anthropogenic activities increasing greenhouse gas (GHG) concentrations in the atmosphere, at least partly due to the nutrient recycling that occurs from animal manure additions in grazinglands. Therefore, quantifying GHG emissions from pastures is essential to better understanding the impacts of grazing on the environment. The objective of this study was to quantify and evaluate the potential effects of …

Coexisting In A Changing World: Humans And Insects In Urban Environments, Clover Smith

College of Arts & Sciences Senior Theses

The urban environment is viewed as a space exclusively for humans, an idea that has been built into the structure of cities during the process of urbanization, which transforms the landscape in a given area for anthropogenic activity. The process of urbanization can be characterized primarily by the widespread use of asphalt and concrete, as well as the introduction of ornamental plant species, which leaves urban environments more vulnerable to impacts of climate change such as flooding and excessive heat. This transformation also negatively impacts the insect species living within these environments, leading to species extirpation from these spaces. As …

Foraging Plasticity And Mercury Contamination In Red-Legged Kittiwakes: A Multiple Stressor Perspective, Sam E. Clay

All-Inclusive List of Electronic Theses and Dissertations

Arctic seabirds are facing increasing stress from climate change, yet the interactive effects of multiple stressors on behavior remain poorly understood. Adopting a multiple stressor perspective promises to advance understanding of avian behavioral responses to climate change, as climate change is exposing Arctic and subarctic animals to a complex set of stressors rather than a single stressor in isolation. Using the red-legged kittiwake (Rissa brevirostris) as a model, I examined how multiple stressors, including mercury (Hg) exposure, shifting wind conditions, and varying foraging conditions linked to sea surface temperature (SST) may interact to constrain behavioral plasticity and energetically expensive behavior …

The Environment, Health, And Vector Nexus: Evaluating The Spatiotemporal Variability And Societal Impact Of Ticks In Arkansas, Dalton Williams

Graduate Theses and Dissertations

Tick-borne diseases (TBDs) are a surging public health and veterinary concern in the United States. In states like Arkansas, climate change and shifting land use have recalibrated the ecological niches of vector species. This research utilizes species distribution and ecological niche modeling to assess the spatiotemporal suitability of ixodid tick habitats, specifically where environmental and socioeconomic factors intersect. By integrating spatial science with public health frameworks, this study identifies priority intervention areas in underserved rural regions where healthcare resources are often constrained. This study provides a comprehensive methodological framework, leveraging remote sensing datasets and historic disease data to delineate exposure …

Indiana Bat Population Dynamics In The Midst Of Climate Change And White-Nose Syndrome, Lexie Ann Schwartz

Theses

Climate change and emerging diseases are altering species distributions and ecosystem dynamics worldwide. For temperate insectivorous bats in North America, food availability and winter climate influence hibernation energetics and survival. As climate warming alters insect phenology, these changes are likely to have an impact on hibernating bats. Many cavernicolous bats in North America are also threatened by white-nose syndrome (WNS), a newly emerged fungal disease devastating bat populations. This study examined the distribution of hibernating Indiana bats (Myotis sodalis) over time throughout their range. I used long-term weather data to simulate seasonal insect availability, the spring and autumn transitory periods, …

Comparing Strategies For Wetland Revegetation In An Uncertain Water Future, Hailey M. Machnikowski

All Graduate Theses and Dissertations, Fall 2023 to Present

Wetlands worldwide are expected to experience more frequent and intense droughts and floods due to climate change. These shifting water conditions introduce challenges to restoring wetland plants, especially using direct seeding. Seeding is cost and labor-efficient compared to planting, but seeds and seedlings are highly vulnerable to water stress, so restoration efforts often fail when conditions are too wet or dry. Understanding how to improve seed-based revegetation under these conditions is increasingly important. Therefore, we sought to understand the response, measured by percent canopy cover or dry biomass weights, of native plants to different durations of drought in greenhouse experiments, …

Impacts Of Climate-Smart Agriculture On Greenhouse Gas Emissions In Southeast Arkansas Cotton, Cassandra Seuferling

Graduate Theses and Dissertations

Increasing concerns of climate change have led to the evaluation of greenhouse gas (GHG) emissions [i.e., carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O)] from agroecosystems, particularly cotton (Gossypium hirsutum) production. Technology improvement and conservation agriculture methods [i.e., reduced-tillage (RT) instead of conventional tillage (CT) and the use of cover crops (CC)] require further evaluation regarding GHG emissions from Arkansas cotton production. The first objective of the study was to evaluate four gas-flux-determination methods [i.e., linear or exponential regression models, with negative fluxes (WNF) included in the dataset or replacing negative fluxes (RNF)] on CO2, CH4, and N2O fluxes …

Changing Pseudo-Nitzschia And Dinophysis Distributions In The North Sea And Western Approaches (Ne Atlantic) And Their Potential Use In Biodiversity Assessments, Matthew M. Holland, Eileen Bresnan, Martin Edwards, Matthew Faith, Clare Ostle, Rowena Stern, Paul Tett, Claire Widdicombe, Callum Whyte, Abigail Mcquatters-Gollop

School of Biological and Marine Sciences

Pseudo-nitzschia and Dinophysis are two commonly occurring phytoplankton genera along Europe’s Atlantic coast. Species within these genera can produce toxins that accumulate in shellfish and pose health risks if consumed. Sustained monitoring of shellfish growing waters has generated decades-long time-series for these two genera, which have been considered for use in statutory biodiversity assessments as proxies for diatoms and dinoflagellates. There is also evidence that distributions are shifting; It is important to document these changes to anticipate risks for shellfisheries, and higher trophic levels. We assessed whether Pseudo‑nitzschia and Dinophysis data could support statutory biodiversity assessments and quantified distributional change …

Sustainable Land Use Optimization In Radioactively Contaminated Landscapes Of Ukrainian Polissia, Iryna Mcdonald, Liudmyla Raichuk

SACAD: Scholarly Activities

Sustainable Land Use Optimization in Radioactively Contaminated Landscapes of Ukrainian Polissia

Dr. Iryna McDonald¹, Dr. Liudmyla Raichuk²

¹Fort Hays State University, Department of Agriculture, Hays, KS, USA

²Institute of Agroecology and Environmental Management of the NAAS, Kyiv, Ukraine

Abstract

The radioecological situation in territories contaminated due to the Chornobyl Nuclear Power Plant accident remains challenging, particularly in the Zhytomyr, Kyiv, and Rivne regions, where certain products continue to exhibit elevated levels of radionuclide content. Contemporary challenges –  such as the full-scale war, which has led to the loss of productive lands in southern and eastern …

Just Unmasking Knowledge? A Critical Interpretation Of Fluctuating Jellyfish Populations For A Mass Media Audience, Wrenne R. Grone

Undergraduate Honors Thesis Projects

While podcasts may not be the most popular form of mass media, they are growing in their accessibility and prevalence in educational discourse. My creative work, in the form of a podcast, unmasks scientific knowledge in an untraditional, mass-media form and will use podcast techniques, such as music transitions and storytelling techniques, to maintain engagement. Additionally, my podcast aims to transpose academic knowledge into a comprehensible, interesting form for a non-academic audience. Jellyfish have no brains, no heart, no blood, and no bones and yet, they have survived for millions of years. The goal of my podcast is to educate …

Bad Faith Disregard Of Benefits And Science In Federal Environmental Deregulation, Michael B. Gerrard

Faculty Scholarship

Since the beginning of the Reagan administration in 1981, federal agencies have used cost-benefit analysis when making important policy decisions, especially when issuing regulations. In the years since then the methodologies have been refined and enshrined in White House guidance. The second Trump administration has upended these practices by often ignoring the benefits of regulations and only considering the costs. In doing so it often claims that there are such uncertainties about the benefits that they should be disregarded. It uses these claims in support of repealing or softening regulations that prior administrations found would save thousands of human lives.

A Primer On International Agreements Relevant To Marine Carbon Dioxide Removal, Korey Silverman-Roati, Romany M. Webb

Sabin Center for Climate Change Law

This primer provides an introduction to seven international agreements relevant to marine carbon dioxide removal (mCDR) research activities in the ocean. Each of these agreements has implications for whether, when, where, and how in-ocean mCDR projects will go forward. The primer is intended to provide policymakers, non-government organizations (NGOs), scientists, and others working on mCDR with an introduction to the agreements and explain their relevance to mCDR. It also offers guidance to those wishing to engage in discussions regarding mCDR under the agreements, which could help resolve open legal questions on their applicability to, and governance of, mCDR.

Institute For Global Health And Development : Issue 13 - March 2026, Institute For Global Health And Development

IGHD Newsletters Archives

• Dr Jai Das Receives AKU Award For Excellence In Research
•  
• Cochrane Review On Umbilical Cord Antiseptics Highlights Impact On Newborn Survival
• Strong Representation And Awards At The 27th National Health Sciences Research Symposium
• Dr Bhavita Kumari Represents Ighd At International Public Health Conference
• IGHD Contributes To National Polio Strategy Discussions At Eoc Meetings
• IGHD Hosts HEC Delegation For Strategic Discussion On Collaborations In Nutrition, Climate Change Courses And Women In Science
• Podcast Panel Explores Gender Equity In Science And Technology
• IGHD Showcases Shapes Research At Heatnexus International Convening
• CERL and NRL Visit By AKU Dean Of Medicine
• Field Visit To …

Review Of Land In Libraries: Toward A Materialist Conception Of Education, Anna Z. Szapiro

Journal of Contemporary Archival Studies

Extractive practices of colonial land theft and environmental exploitation have produced intolerable global conditions leading to climate collapse. As the information field grapples with its culpability in colonial violence and climate change, Lydia Zvyagintseva and Mary Greenshields’s incisive Land in Libraries: Toward a Materialist Conception of Education draws contributions from practitioners in the United States and Canada to chart a way forward. Through historical analysis, case studies, critical theory, and autoethnography, authors in this volume take up land – and our relation to it – as the epistemological catalyst for systemic change. At once austere critique and lyrical contemplation, Land …

Micro-Refuges Or Ecological Traps: Context-Dependent Effects Of Rock Pools On Intertidal Biodiversity Across Latitudes, Louise B. Firth, Andrea Desiderato, Antony M. Knights, J. David Aguirre, Juan C. Astudillo, Juan C. Azofeifa-Solano, David T. Bilton, Su Yin Chee, Hartvig C. Christie, Ronaldo A. Christofoletti, Amelia Curd, Katherine A. Dafforn, Megan N. Dethier, Yun Wei Dong, Gabin Droual, Stanislas F. Dubois, Free Espinosa, Ally J. Evans, Andy Foggo, Stephen J. Hawkins, Mick E. Hanley, Ben P. Harvey, Eliza Heery, Seokwoo Hong, Amanda R. Hsiung, Tommy T.Y. Hui, Mar Humet, Katrin Iken, Soniya B. Jethva

School of Biological and Marine Sciences

AimWe investigated how local-scale environmental heterogeneity influences biodiversity patterns across broad biogeographic gradients, using intertidal microhabitats as a model system within one of the most environmentally stressful ecosystems on Earth.LocationIntertidal habitats at 26 locations (two rocky shore sites per location) across six continents, spanning 98° of latitude (38°S to 60°N).Time Period2019–2022.Major Taxa StudiedAlgae, sessile and mobile invertebrates.MethodsWe compared biodiversity and thermal environments across contrasting microhabitats (rock pools and adjacent emergent rock) along a latitudinal gradient, sampling during environmentally ‘milder’ and ‘harsher’ periods. Biodiversity was quantified using multiple richness metrics (mean, total, unique taxa) and functional diversity.ResultsMicrohabitat differences strongly influenced biodiversity …

Ancient Wisdoms For Modern Crises: Learning From Laozi’S “Daodejing”, Steve Hallett

Purdue University Press Books

We live in a time of abundance and comfort for some, scarcity and hardship for others—a period that seems to have all of us teetering on the brink. Certainly, there is no lack of modern crises, but do we possess the wisdom to overcome them, and where might we seek that wisdom? Ancient Wisdoms for Modern Crises: Learning From Laozi’s “Daodejing[JR1] [ED2] [NN3] ” looks to the Daodejing, a text written during the late Zhou Dynasty (600–400 BCE), for guidance. One of the core treatises of Eastern philosophy, it advocates humility, simplicity, and sustainable living. As both a …

Agricultural Water Management In A Changing Maryland: Stakeholder Experiences And Attitudes Towards Weather Variability, Alternative Water Sources, And Related Factors, Michele Romolini, Alexa C. Siglar, Paul T. Leisnham, Amanda K. Rockler, Masoud Negahban-Azar, Adel Shirmohammadi

Center for Urban Resilience Scholarship

The state of Maryland has experienced significant but commonly overlooked impacts on water quality and quantity. Future climate change is predicted to further reduce water availability, with nontraditional water sources such as treated recycled wastewater (TRW) as one potential way to mitigate impacts. We conducted semi-structured interviews with 17 Maryland stakeholders—including farmers, extension agents, state agency personnel, and academics—to explore their perceptions and experiences with 1) past, existing and future weather variability; 2) freshwater and reusable water use and management in agriculture; and 3) related factors impacting agricultural water management. Qualitative coding of interview transcripts produced 27 categories containing 291 …

Vulnerability Of Marine Megafauna To Global At-Sea Anthropogenic Threats, Michelle Vancompernolle, Juliet Morris, Hannah J. Calich, Jorge P. Rodríguez, Sarah A. Marley, Jessica R. Pearce, Briana Abrahms, Katya Abrantes, André S. Afonso, Alex Aguilar, Andrews Agyekumhene, Tomonari Akamatsu, Susanne Åkesson, Nyimale G. Alawa, Joanna Alfaro-Shigueto, R. C. Anderson, Tycho Anker-Nilssen, Javier A. Arata, Scott A. Shaffer, For Full Author List, See Comments Below

Faculty Research, Scholarly, and Creative Activity

Marine megafauna species are affected by a wide range of anthropogenic threats. To evaluate the risk of such threats, species’ vulnerability to each threat must first be determined. We build on the existing threats classification scheme and ranking system of the International Union for Conservation of Nature (IUCN) Red List of Threatened Species by assessing the vulnerability of 256 marine megafauna species to 23 at-sea threats. The threats we considered included individual fishing gear types, climate-change-related subthreats not previously assessed, and threats associated with coastal impacts and maritime disturbances. Our ratings resulted in 70 species having high vulnerability (v > 0.778 …

Common Octopus (Octopus Vulgaris) Blooms Off The Southwest Of The Uk: History, Trends, Causes And Consequences.: Report On Work Package 1: History, Causes And Consequences Of Octopus Blooms, Bryce Stewart, Simon Thomas, Tim J. Smyth, Molly K. James, Emma Sullivan, Alice Hall, Tully Osmond, Emma Sheehan

School of Biological and Marine Sciences

Common octopus (Octopus vulgaris) are normally uncommon in UK waters, with a mainly south-westerly distribution linked to the species’ preference for warmer conditions. However, a major population bloom occurred off southwest UK in 2025, comparable to rare historical blooms recorded in 1899–1900, 1932–33 and 1950–51. The species’ rapid growth, high fecundity and short lifespan make its populations highly responsive to environmental conditions. Evidence from fisheries landings, scientific surveys and citizen science confirmed the bloom, with commercial fisheries landings of common octopus in 2025 being almost 65 times higher than recent annual averages. The 2025 bloom and all previous blooms were …

Unlocking The Benefits Of Transparent And Reusable Science For Climate Risk Management, Adam B. Pollack, Lisa Auermuller, Casey D. Burleyson, Jentry Campbell, Madison Condon, Courtney Cooper, Matteo Coronese, Sönke Dangendorf, James Doss-Gollin, Prabhat Hegde, Casey Helgeson, Robert E. Kopp, Jan Kwakkel, Corey Lesk, Justin Mankin, Robert E. Nicholas, Jennie Rice, Samantha Roth, Vivek Srikrishnan, Moira Scheeler, Nancy Tuana, Chris Vernon, Mengqi Zhao, Klaus Keller

Faculty Scholarship

People around the world seek climate risk information to guide their decisions. For instance, projections about future flood risk inform where households choose to live, how lenders manage credit risks, and which communities receive federal funding. Yet data limitations and fundamental validation challenges raise important concerns about the reliability of such projections. The principles of transparency and reusability help address these concerns by enabling scrutiny of assumptions and methods, development of foundational data and tools, and consistent application of evaluation standards. While there is ongoing debate about how much transparency commercial climate risk services should provide, many expect noncommercial actors …

Rethinking Geoengineering Governance Utilizing The Playing God Argument: Considerations Of Knowledge, Control, And Benevolence, Julian Dreiman, Brian Patrick Green

Staff Publications and Research

Because greenhouse gas emissions continue to grow, it is increasingly challenging to limit global warming to 1.5 or 2.0 degrees Celsius. As such, there is a growing debate on whether or not to deploy geoengineering to reduce warming. Geoengineering is controversial, and many arguments have been raised against it, including the “playing God” critique. When understood through the philosopher Moti Mizrahi’s reinterpretation, the playing God critique does not eliminate the possibility of using geoengineering, but rather informs how its governance can be improved. We use Mizrahi’s interpretation of the playing God critique to claim that the existing governance literature lacks …

21st-Century Mangrove Expansion Along The Southeastern United States, Lucia I.A. Enes Gramoso, Dustin Carroll, Kyle C. Cavanaugh, Remi Bardou, Michael J. Osland, Tom Van Der Stocken

Faculty Research, Scholarly, and Creative Activity

Warming winter temperatures are driving range expansion of tropical, cold-sensitive mangroves into temperate ecosystems. Along the Atlantic coast of North America, the mangrove range limit is particularly sensitive to climate variability and historical data demonstrate that the mangrove-salt marsh ecotone on this coast has shifted recurrently during recent centuries. However, a comprehensive understanding of how this mangrove-salt marsh ecotone may shift in the future remains lacking. Here, we combine ensemble forecasting of mangrove distribution for the next century with high-resolution oceanographic dispersal simulations, phenological observations, and historical hurricane data to project future mangrove-salt marsh dynamics at the rapidly changing range …

Environmental Footprint Of Aortic Valve Replacement: A Comparative Life-Cycle Analysis Of Surgical And Transcatheter Procedures, Yves Najm Mrad, Ahmad Al-Taweel, Bahaeddin Shabaneh

Gulf Coast Division GME Research Day 2026

No abstract provided.

Climate Change Impacts On Forest Canopy Temperatures: From Mechanisms To Implications, William Hagan Brown

School of Geography, Earth and Environmental Sciences Theses

Forests are a vital interface between the biosphere and the atmosphere. As global temperatures rise due to increasing anthropogenic greenhouse gas emissions, it is important to understand the response of forest tree canopy leaf temperature (T_can). Additionally, understanding variation in T_can and regulation across species within ecosystems is crucial for understanding how climate change affects plants. Thus, this research aimed to measure T_can in temperate and tropical forests under contrasting environmental conditions to advance understanding of T_can. At the Birmingham Institute of Forest Research Free-Air CO₂ Enrichment (BIFoR-FACE) site, continuous thermal infrared (TIR) …

A Stable Isotope Comparison Of The Biogenic Carbonate Of Mammalian Tooth Enamel From The Modern Ohio River Valley And Fort Ancient Buffalo Sites, Sara Elizabeth Slack

Theses, Dissertations and Capstones

δ¹⁸O and δ¹³C values change in response to anthropogenic factors (Ghosh & Brand, 2003). Little is known about the effects of anthropogenic climate and land use change on the ecology of the Ohio River Valley. The goal of this research was to quantify the effects of European colonization on the native ecology of the region. The specific questions of this research were: (1) How have mammalian tooth enamel δ¹⁸O and δ¹³C compositions shifted over time within the Ohio River Valley in response to anthropogenic climate change and vegetation? (2) Are there differences …

Community Science For Enigmatic Ecosystems: Using Ebird To Assess Avian Biodiversity On Glaciers And Snowfields, William E. Brooks, Jordan Boersma, Neil Paprocki, Peter Wimberger, Scott Hotaling

Watershed Sciences Faculty Publications

Mountain glaciers and snowfields are rapidly receding because of climate warming. Species living in these habitats remain poorly studied, likely because of the remoteness and ruggedness of their terrain. We leveraged community science data from eBird—an online database of bird observations from around the world—to characterize bird use of mountain glaciers and snowfields. We estimated total bird biodiversity and preference for glaciers and snowfields over nearby, ice-adjacent habitats. We used field notes from eBird users and breeding codes to extend our data set to include insight into habitat usage and behavior. Finally, we compared our community-science approach to previous studies …

High Coral Thermal Tolerance At A Potentially Climate-Resistant Reef, Kate M. Quigley, C. Siqueira, Kira Brereton, Andrew H. Baird

Research outputs 2022 to 2026

Ecosystems globally are under increasing pressure from warming caused by climate change. However, some locations appear resistant to impacts. Although rare, these locations might be able to better resist damage from thermal stress. In marine environments, coral bleaching is widely viewed as one of the most pervasive stress responses threatening reef health, structure, and function. Yet we still have a poor understanding of the drivers of spatial and temporal variation in the scale and severity of coral bleaching. Here, we characterize a prolonged, intense, and widespread marine heatwave event and uncover a conspicuous lack of bleaching at the southernmost coral …

Gender Justice In The Triple Planetary Crisis: A Scoping Review, Catelyn Richards, Micah Peters, Julia Charalambous, Lila Singh-Peterson, Lucy Osborn, Aletha Ward, Jessica Leclair, Tracy Levett-Jones

Research outputs 2022 to 2026

Aim: To identify and report how gender justice is conceptualised and discussed in contemporary health literature in relation to the Triple Planetary Crisis of climate change, pollution and biodiversity loss, with a particular focus on the experiences of women and gender-diverse populations, and the representation of nurses and other healthcare professionals dominated by women. Design: Scoping review. Data Sources: Searches were conducted across MEDLINE (Ovid), Scopus, CINHAL, Embase and ProQuest, focusing on studies published from January 1 2000–23 September 2024. Review Methods: The review was conducted in accordance with the JBI methodology for scoping reviews and reported against the Preferred …

Understanding Climate Change And Wellbeing Through Bhutan's Pursuit Of Gross National Happiness, Tashi Dorji

Theses: Doctorates and Masters

Climate change has evolved into one of the biggest global challenges of the twenty first century reshaping ecological systems and social conditions with wide-ranging implications for human wellbeing. Bhutan offers a distinct context to explore interactions between climate change and wellbeing as it remains guided by its wellbeing-centred development philosophy of Gross National Happiness (GNH). At the same time, it remains highly vulnerable to climate change despite being the only carbon negative country in the world. Nonetheless, the intersections between climate change and GNH have not been systematically explored.

This research aims to explore the relationship between climate change and …

Succession And Alpine Plant Habitat Of A Recently Deglaciated Foreland In The Trinity Alps, California, Sebastian Evans

Cal Poly Humboldt theses and projects

The recent extinction of the Salmon Glacier in the Trinity Alps, California, provides a rare opportunity to examine post-glacial succession in a region of high endemism experiencing climatic stress. Using a chronosequence spanning ~150 years since deglaciation, I investigated (1) vegetation successional trajectories in the foreland, (2) whether the foreland functions as a climate refugium for alpine specialists, and (3) whether facilitative interactions between the dominant vascular plant (DVP) and bryophytes occur and persist through succession. I surveyed 100 plots across 11 transects within the foreland and 40 randomized plots in adjacent ecosystems. Successional patterns and refugial potential were analyzed …