Digital Commons Network^™

Time-Transgressive Microbial Diversity In A Tropical Bat Guano Accumulation, Deer Cave, Mulu, Borneo, Joyce Lundberg, Donald A. Mcfarlane

International Journal of Speleology

Bat guano accumulations in caves can constitute large deposits of organic material, particularly chitin and its degradation products, that host a diverse microbiome. Previous microbiological studies have not addressed the stratified nature of these deposits in the context of the timeframe of the decomposition process. We present such data (temperature, pH, DNA sampling of eight carbon-dated strata) for a 75 cm-deep tropical guano accumulation that undergoes complete decomposition over a timescale of ~120 years. The aerobic, surface layer of freshly-fallen guano has the greatest diversity of taxa, with Bacteroidota co-dominant with Pseudomonadota, and includes many taxa unique to this …

Housing Buyouts At The Intersection Of Flooding And Toxins: A Case Study Of Cheraw, South Carolina, Victoria Ponds

Theses and Dissertations

As climate change increases extreme weather events, efforts of managed retreat will also increase, particularly through housing buyout programs. The largest scale housing buyout programs are run through the Department of Housing and Urban Development (HUD) and the Federal Emergency Management Agency (FEMA). These buyout programs focus primarily on flood hazards and exclude anthropogenic hazards. This policy is problematic in the modern technological age where compound hazards, including those involving toxin releases, are occurring more frequently. In this thesis, I investigate how disaster policies account for the intersection of these hazards in Community Development Block Grant-Mitigation buyouts in Cheraw, South …

Detection And Analysis Of Solid-Phase Nutrients In Complex Benthic Cyanobacterium Communities, Cassidy Ann Crandell

Theses and Dissertations

Eutrophication is one of the most serious water quality issues affecting aquatic systems in the United States. Densely populated urban areas as well as mining and agriculture are major sources of anthropogenic nutrient loading into lakes and rivers. Excess loading of nutrients like phosphorus (P) into these ecosystems can cause native algal species to be outcompeted by harmful algal bloom (HAB) species. Increases in these HAB events are a growing public health concern as contact with excreted toxins can be harmful for human, aquatic, and land species. Remediation techniques like total maximum daily loads (TMDLs) have been implemented to reduce …

The Current - Volume 35 Issue 1 (Including Special Section On Sports), Nova Southeastern University

Student Newspapers

No abstract provided.

Driving Green Investments To Address Climate Change, Baptiste Gibrat

Dartmouth College Master’s Theses

The climate crisis is no longer news, and society needs to accelerate the transition to net zero emissions. Otherwise, the consequences of climate change will become increasingly catastrophic.

This thesis develops a framework to drive green investments, which reduce society’s dependance on fossil fuels. Initially, the research provides a comprehensive examination of these investments, followed by an exploration of three strategies to enhance their adoption: leveraging financial instruments and capital markets, implementing regulatory frameworks, and harnessing the power of technologies. To integrate these elements within a comprehensive framework, the study employs market research, reviews relevant literature, and includes interviews with …

Impact Of Shale Oil And Gas Exploration In The Permian Basin: Public Finances, House Prices, Migration, And Household Income, Bamadou Ouattara

Economics ETDs

This dissertation examines the impacts of shale oil and gas exploration in the Permian Basin, focusing on housing, socio-demographics, petroleum exploration, and environmental effects. It addresses three key research areas: New Mexico's public finances, inter-county migration and household income, and the influence on house prices.

The introductory chapter reviews the boomtown impact model and advocates for its adaptation to current social, economic, and financial landscapes. The second chapter analyzes New Mexico's public finances from 2010-2021, emphasizing oil and gas tax revenues and the need for financial prudence due to industry volatility.

The third chapter uses causal effect techniques to assess …

Groundwater Modeling Of The Ogallala Aquifer: Use Of Machine Learning For Model Parameterization And Sustainability Assessment, Tewodros Aboret Tilahun

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Addressing groundwater depletion problems in heterogeneous aquifer systems is a challenge. The heterogeneous Ogallala Aquifer, a critical source of groundwater in the central United States, has undergone decades of decline in water levels due to pumping. This project aims to build a robust groundwater model to evaluate optimal scenarios for sustainable use of the groundwater resource within a section of the Ogallala aquifer located in the Middle Republican Natural Resources District (MRNRD). This study follows a comprehensive approach involving parameterization, construction, and optimization. The model is parametrized using hydraulic conductivity and recharge values obtained from a random forest-based machine learning …

Rhetorical Tapestries Of Water Injustice: The Framing Of (In)Access And (In)Justice In The Struggle For Water Security In The United States, Carla R. Richards

Electronic Theses and Dissertations

This dissertation argues that access to clean water is a fundamental human right and a cornerstone of environmental justice. It critiques existing communication and rhetorical scholarship for overlooking the environmental dimensions of water access and justice. This gap hinders progress toward equity for marginalized communities disproportionately burdened by water insecurity.

This project proposes a communication approach that prioritizes culturally relevant strategies to empower these communities in advocating for their environmental rights and health needs. By bridging the communication and environmental justice fields, this project equips communities with the tools to demand fair solutions. It ultimately calls for a transformative shift …

Maine School Of Wonder: Developing A School For Earth Skills And Sustainability In Maine, Leigha Hart

Capstone Collection

This research project explores the feasibility of establishing an earth skills and spirituality school in Maine, examining pertinent literature on adult environmental education, contemporary notions of work and leisure, earth-centered spirituality, and sustainable development. The study draws insights from interviews conducted with four distinct organizations across Maine engaged in similar initiatives. These include two farms hosting community events and workshops, alongside two retreat centers dedicated to fostering personal growth and skills development. These interviews provide diverse perspectives on the operational dynamics, required resources, and necessary skills for launching a new school aimed at creating inclusive, engaging, and sustainable learning environments …

Characterization And Bioremediation Potential Of Heavy-Metal Resistant Bacteria Isolated From Agricultural Soil, Kheira Dahnoun, Fatima Djadouni, Badiaa Essghaier, Chahnez Naccache, Nadia Zitouna, Salwa Zehdi-Azouzi, İsmai̇l Bayyi̇ği̇t, Hijran Rafiyeva Latif, Maha Mezghani-Khemakhem, Hedia Bourguiba

Turkish Journal of Agriculture and Forestry

Heavy metal pollution is a major environmental issue that has a negative impact on soil quality and food security. As a result, heavy metal removal or remediation from hazardous sites has become mandatory. Bioremediation based on microorganisms is a promising method to remediate heavy metal-contaminated areas due to its eco-friendly, cost-effective, and highly efficient characteristics. This study aimed to isolate, identify and characterize rhizospheric bacteria able to resist, reduce, and detoxify heavy metals (chromium [Cr], nickel [Ni], and aluminum [Al]) from agricultural soil. Two isolates were chosen due to their high level of heavy metal resistance and could serve as …

Comparing Shade And Impervious Surface Area With Extreme Heat And Environmental Equity: An Analysis Of The Urban Heat Island Effect In Santa Clara County, California, Jamsheed R. Mistry

Master's Theses

In the modern epoch of the Anthropocene, the rapid rise in urban sprawling has prompted a disproportionate exposure to extreme heat within underserved communities. As the global populace becomes increasingly urbanized, the inevitable formation of urban heat islands is becoming an imminent cause of concern for environmental and social justice. Due to an increase in urbanization, anthropogenic activities have not only increased the energy demand for cooling initiatives but also have increased the intensity of heat-related illnesses, such as heart attacks, dehydration, and respiratory diseases. Additionally, urbanization has yielded an unequal distribution of heat exposure and heat-related illnesses, particularly in …

History Education: Learning History From Community College Students’ Perspectives, Mylinh V. Pham

Dissertations

Given the current political climate of division, the study of history is important now more than ever, but the value of the study of history has been marginalized. This study used student focus groups to understand ways in which history could be taught in such a way that its importance is emphasized through relevance and connection to current social and political issues and through student-centered learning. This study also determined how history could help students evaluate and think critically about historical content. This study drew on the experiences of community college students who have taken a higher education history course …

Solar Photovoltaics As Climate Change Adaptations For Farmers In West Bengal, India: Barriers Within A Food-Water-Energy Nexus Approach, Emily Rochford

Capstone Collection

This capstone research project seeks to identify and address barriers to the use of solar photovoltaics (PV) as an adaptation method to climate change for farmers in West Bengal, India. These barriers are examined within the context of the food-water-energy nexus, particularly concerning the ability of many small holder farmers to produce their own food and sustain their livelihoods. Previous studies have examined both energy access and renewable energy development in West Bengal, and also the food-water-energy nexus in its application to climate change. However, there is minimal literature on how renewable energy development should be applied within the nexus …

A Lifetime Of Climate Changes: Female Farmers' Perceptions Of Climate Change Impacts To Well-Being And Livelihood In Antigua And Barbuda, Jamie Matthews

Capstone Collection

This capstone project emphasizes the value of smallholder farmers working on small island developing states (SIDS) in an era of climate change—with a particular focus on female farmers in light of the global feminization of agriculture. This research study engaged female farmers living in Antigua and Barbuda, a SIDS in the Caribbean, to capture their perceptions of climate risks and the impacts climate change has had on their well-being and livelihood. Qualitative data was collected via life history interviews (LHI), as well as focus group discussions (FGD). These methodologies addressed the primary questions of this research: (i) How do female …

Conquer And Prevail Issue 169 August 8 2024, Wofford College. Office Of Marketing And Communications

Conquer and Prevail Newsletter

No abstract provided.

Thinking Blue / Writing Red: Marxism And The (Post)Human, Stephen C. Tumino

Publications and Research

Thinking Blue/Writing Red interrogates contemporary culture across a range of texts, from the pandemic (‘Covid’ and ‘Trump Speak’) to high theory (Melville's narratives) and popular culture (Beyoncé's ‘Formation’ and Super Bowl performance, Twin Peaks , metamodern ‘cli-fi’ films). Inspired by Derrida’s idea of the secret, Tumino examines the significance of social movements (Black Lives Matter, Occupy, alter-globalization) and naïve art (Darger, Ryden) to argue that these texts speak of the secrets that capitalism cannot speak. Contending that the cultural surfaces narrate only the ‘nonsecret,’ that to see the social logic of the culture one must dig into what Bruno Latour …

Modern Building Structures Are A Landscape-Level Driver Of Bat–Human Exposure Risk In Kenya, Tamika Lunn, Reilly T. Jackson, Paul W. Webala, Joseph G. Ogola, Kristian M. Forbes

Biological Sciences Faculty Publications and Presentations

Identifying the locations and drivers of high-risk interfaces between humans and wildlife is crucial for managing zoonotic disease risk. We suggest that continent-wide improvements to residential housing in Africa are inadvertently creating artificial roosting habitat for synanthropic free-tailed bats (family Molossidae), and that improved buildings are a rapidly accelerating exposure interface that needs urgent research attention and investment. Along a residential gradient in rural southern Kenya, we mapped building use by free-tailed bats in 1109 buildings. We show that bats often roost in human-occupied buildings, with almost one-in-ten buildings exhibiting evidence of bat occupation (9.2%) and one-in-13 found to contain …

Global Portraits From A Changing Climate: The Influence Of Environmental Storytelling On The Climate Narrative, Alexandra Welch

Capstone Collection

Environmental Storytelling can influence the climate narrative and serve as a catalyst to structurally alter how individuals think about the environment. The medium of the “Eco-film” allows viewers to create intimate connections with the natural world, and in turn alter how individuals engage and perceive issues like climate change. To combat climate denialism this project showcases different hopeful stories in a deliverable video collection, called “Global Portraits from a Changing Climate”. Two of these videos will be filmed in Germany, featuring the Waldrapp Team Research and Conservation project. One of the videos from Waldrapp Team will touch on the social …

Living Dead Forests: Assessing Detrital Services In Puget Sound Pseudotsuga Menziesii Ecosystems, Forrest Becker

Capstone Collection

Coarse woody debris (CWD), the detrital result of down wood recruitment, contributes to wildlife habitat, nutrient cycling, morphological processes like soil formation, and each forest’s sense of place but if undermanaged can fuel wildfires or obstruct stakeholder use. Despite its ubiquity in Puget Sound Douglas fir (Pseudotsuga menziesii) forests in Washington, USA, few studies quantify the exact ecosystem services which down wood provides. This study seeks to understand how forest managers can estimate the ecosystem services of down wood and how human communities perceive down wood management between community, public, and private Douglas fir (P. menziesii) …

Beat The Heat: Community Perspectives Around Extreme Heat In Spokane, Wa, Post-2021 Northwest Heat Dome, Jason J. Lau, Brian G. Henning, Kate Tokareva, Kaitlan Ducken, Faisal S. Malik, Tania Busch Isaksen

Climate, Water, and the Environment Research

Extreme heat events are the leading weather-related causes of death in the United States. Despite heat familiarity in eastern Washington, at least 19 heat-related deaths occurred in Spokane County during the 2021 “heat dome” in the Northwest. To assess heat concerns among vulnerable groups and identify cooling access barriers, surveys were conducted with Spokane County residents from July to November 2022. Descriptive statistics and ordinal logistic regression characterized perceptions of heat, access to home cooling, and interest in public cooling for vulnerable populations. A total of 1477 adults completed the survey. Demographics were comparable to the Spokane County US Census: …

Gps Accuracy Of Smartphones For Crowdsourcing Research, Derron L. Dike

Master of Science in Environmental Sciences and Management Projects

ABSTRACT GPS Accuracy of Smartphones for Crowdsourcing Research Derron Dike Utilizing crowdsourcing with smartphones as a method for field data collection can contribute an array of data for scientific studies and land management applications. This study used crowdsourcing to examine smartphone built-in GPS performance for providing location-specific information with potential forestry applications. The usability of smartphones for GPS data collection in forestry studies or other practical applications is dependent on the level of accuracy required for those applications. A Smartphone Accuracy Trial was designed to test the GPS accuracy performance of current smartphones. Participants used the ArcGIS Field Maps application …

How Can Event Attribution Science Underpin Financial Decisions On Loss And Damage?, Dim Coumou, Paola A. Arias, Ana Bastos, Charlotte Kendra Z. Gotangco Gonzales, Gabriele C. Hegerl, Pandora Hope, Christopher Jack, Friederike Otto, Fahad Saeed, Olivia Serdeczny, Theodore G. Shepherd, Robert Vautard

Environmental Science Faculty Publications

With climate extremes hitting nations across the globe, disproportionately burdening vulnerable developing countries, the prompt operation of the Loss and Damage fund is of paramount importance. As decisions on resource disbursement at the international level, and investment strategies at the national level, loom, the climate science community’s role in providing fair and effective evidence is crucial. Attribution science can provide useful information for decision makers, but both ethical implications and deep uncertainty cannot be ignored. Considering these aspects, we articulate a vision that integrates established attribution methods and multiple lines of evidence within a coherent logical framework.

How Anthropocentrism Shaped Florida, Olivia Benson

Harriet L Wilkes Honors College Theses 2020 - Present

Anthropocentrism, the belief that humankind is central to existence and has priority over all other living beings and systems, is embedded in Western philosophy and motivates environmental degradation. The history of Florida provides some of the most egregious examples, compiled with instances of large-scale transformation and destruction for the sake of tourist, residential, commercial, and industrial developments. Florida’s rapid development and natural resource use in the twentieth century changed its unique landscape by using ruinous methods to reclaim land and synthesize a paradise for humans alone. The loss of over half of the Everglades—the unique wetland system with incredible biodiversity—is …

Reducing Greenhouse Gases Through Food Waste Reduction: A Literature Review Of Programs And Behavior Change, Schafer Flowerday

Capstone Experience: Master of Public Health

Anthropogenic greenhouse gas (GHG) emissions significantly contribute to climate change. Methane is a potent GHG emitted in landfills as organic material breaks down. Food waste is the single most common item disposed of in Lincoln’s Bluff Road Landfill (LTU, 2022). As such, food waste disposal in the landfill is a preventable issue that could dramatically reduce GHG emissions in Lincoln. This project seeks to determine what barriers and motivations exist for reducing food waste at a consumer level. A literature review was conducted to find what behavior change campaigns and interventions have taken place nationwide to encourage residential food waste …

Introduction To The Special Issue

Midwest Social Sciences Journal

No abstract provided.

Volume 26, Issue 2 (Special Issue) -- Full Contents

Midwest Social Sciences Journal

No abstract provided.

A Study Of The Impact And Mitigation Strategies For Community-Defined Historic Places At Immediate (Within Three Decades) Risk Of Sea Level Rise, Isaac Quaye

All Theses

The rising sea level casts formidable threats on community-based historic places within coastal communities. These community-defined historic places derive their meaning from local values and are more recognized within the local community. Unlike recognized iconic historic places, these resources are confronted with inadequate resources to address the impacts of punctuated climate events. This study investigates the imminent threats posed by sea level rise (SLR) to community-defined historic places within the next three decades (2025) and explores mitigation strategies proposed by stakeholders. The study used a GIS-based (enhanced bathtub model) to model the impact of coastal inundation on three historic places …

Exploring The Motivations And Determinants Of Farmer’S Market Consumers And Organic Specialty Crop Producers, Jane Arnold

All Theses

This two-chapter thesis evaluates the motivations and determinants of the central figures in farmers’ markets and organic markets. The first chapter explores the rise of farmers’ markets popularity through an in-person survey that was designed and distributed to 274 farmers' market consumers. Logit and ordered logit regressions were used to identify the motivations and characteristics that affect the likelihood of being a frequent farmers’ market customer (visiting 5 times or more per season) and spending over $50. The second chapter investigates the organic markets for cucumber and kale, which are dominant specialty crops on today’s grocery shelves. To identify the …

Modeling, Optimization, And Characterization For Choke Horn Antennas, Ibrahim Nasser I Alquaydheb

Graduate Theses and Dissertations

This dissertation presents a comprehensive study focusing on the modeling, optimization, and characterization of choke horn antennas (CHAs). An analytical model designed to capture the parameters of CHA and derive the total radiated fields from the choke and waveguide elements is primarily focused on in this work. Compared to the use of simulation software, such as ANSYS HFSS (High Frequency Structure Simulator) or CST Studio, which employs numerical methods to simulate and calculate antenna performance, numerous advantages are offered by the analytical model. Analytical models provide deeper insight into electromagnetic interactions and the principles governing antenna behavior, leading to a …

Lca Operational Carbon Reduction Based On Energy Strategies Analysis In A Mass Timber Building, Moein Hemmati, Tahar Messadi, Hongmei Gu, Mahboobeh Hemmati

Architecture Faculty Publications and Presentations

Buildings play a significant role in the rise of energy consumption and carbon emissions. Building operations are responsible for 28% of the world’s carbon emissions. It is crucial, therefore, to evaluate the environmental impact of various buildings’ operational phase in order to implement sustainable strategies for the mitigation of their energy usage and associated carbon footprint. While numerous studies have been conducted to determine the carbon footprint of conventional building operation phases, there are still a lack of actual data on the operational carbon (OC) emissions of mass timber buildings. There is also a lack of research pertaining to the …