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Fungal Mycelium: The Key To A Sustainable Future, Sawyer Krivanek

Department of Environmental Studies: Undergraduate Student Theses

This study focuses on fungal mycelium-based packaging as a biodegradable replacement of polystyrene packaging. In this thesis project, there will be a thorough study of the characteristics of fungal mycelium and how it can be combined with other products to create biodegradable packaging. Polystyrene packaging is unsustainable and poses threats to human health and our natural environments. It is pivotal that alternative packaging options for polystyrene are researched and tested to prove reliability as packaging systems develop. Research questions answered in this thesis include: Can fungal mycelium be a biodegradable replacement for plastic/polystyrene packaging at a large scale? What is …

What Are The Impacts Of Plastic Pollution On Sea Turtles And How Can We Prevent Them?, Stacey Safarik

Department of Environmental Studies: Undergraduate Student Theses

This paper will address the impacts of plastic pollution on sea turtles and how humans can combat the issue. Sea turtles are often harmed due to human activities because the ocean is used as a dumping ground for trash, and humans need to take it upon themselves to change this. The purpose of this project was to learn how plastic can impact the lives of sea turtles, and to find out if there are prevention efforts in place. A thematic literature review was conducted in order to find all of the data. Once all of the data was compiled, it …

The Effects Of Phosphate On The Metamorphosis Of Larval Western Barred Tiger Salamanders (Ambystoma Mavortium), Alexis Jean Polivanov

Department of Environmental Studies: Undergraduate Student Theses

This investigation will collect data to assist in determining if elevated aquatic phosphate levels affects the metamorphosis rate of larval western barred tiger salamanders (Ambystoma mavortium). Monoammonium phosphate fertilizers are being used on crops in Nebraska (NDA, 2017). This area lines up with the area the western barred tiger salamanders are disappearing from (Damme, 2018). Monoammonium phosphate is made up of nitrogen and phosphate. There have been several studies showing how nitrogen is harmful to amphibians such as this salamander (Griffis-Kyle, 2007) (Griffis-Kyle & Richtie, 2007), but there have not been many showing how phosphate affects amphibian’s metamorphosis …

Diet Composition And Analysis Of Fish Species Consumed By The Eurasian Otter In A Marine/Costal Environment, Alexandrea Otto

Department of Environmental Studies: Undergraduate Student Theses

Understanding prey preference in Eurasian otters, Lutra lutra, is important to provide greater insight into aquatic predator-prey relationships which will inform conservation efforts. Identifying the composition of an organism’s diet is one of the primary steps in understanding an organism and developing effective conservation strategies. This study expands upon basic identification of consumed items to estimate size of fish eaten by Eurasian otters to provide information on the diet of these important aquatic predators. Many studies on the Eurasian otter have considered diet from river systems, yet less is known of their diet in marine systems. The goal of my …

A Study Of The Relationships Between Environments And Human Death Practices, Carly Elizabeth Thody

Department of Environmental Studies: Undergraduate Student Theses

This paper analyzes connections between environmental factors and human death practices from several locations throughout the world. Using a thorough literature review, a thematic analysis is applied to combine a variety of sources to draw conclusions regarding how death practices are influenced and evolve over time. Environments, broken down into physical geography, religious, social, and political influences, are examined for the United States, Mexico, Japan, The Torajans of Sulawesi, Indonesia, and Tibet. Factors such as religion and culture have been an important component in the development of many societies’ practices revolving around death. The interconnectedness of cultures makes it difficult …

Lincoln, Ne Composting In Restaurants, Brodie Baum

Department of Environmental Studies: Undergraduate Student Theses

This study aimed to investigate restaurants across the city of Lincoln, Nebraska that compost as a way to reduce food waste. Food waste is a growing environmental concern because it leads to climate change, eutrophication and acidification of bodies of water, pollutes the air and more. This study utilized a software program to distribute a survey that restaurants owners/personnel would take. The survey asked a variety of questions that provided information about the restaurants and who runs it. This information allowed us to draw important conclusions. Based on the results of the survey we can begin to speculate about possible …

Sustainable Building Certification In Healthcare And Patient Satisfaction, Brian Jay Goehner

Walden Dissertations and Doctoral Studies

Eco-friendly healthcare delivery concepts are becoming more accepted as hospital leaders seek to control energy costs, mitigate contributions to climate change, and preserve scarce resources. Leadership in Energy and Environmental Design (LEED) offers healthcare leaders a framework for designing and constructing sustainable facilities that meet efficiency goals. The purpose of this quantitative cross-sectional study was to build an understanding of whether LEED certification influences Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) ratings. Using complex systems theory as the framework, the research questions were focused on exploring if higher levels of LEED certification led to greater HCAHPS overall hospital …

Winter Patch Grazing, Patch Burn Grazing, And Bird Communities In Western South Dakota, Jennifer Lutze

Electronic Theses and Dissertations

Ground nesting bird species are on a considerable decline and research efforts are being made to increase these populations throughout the Great Plains. Ground nesting bird communities found in the Northern Great Plains are driven greatly by varying amounts of cover and area size. Past research implemented patch-burn grazing to increase structural heterogeneity and to increase grassland bird habitat in the tallgrass prairie. While bird populations were very responsive to this management in the Northern Great Plains fire management is viewed negatively, especially for Midwest cattle ranchers. We implemented research to determine if winter-patch grazing on mixed grass prairie could …

Aquatic Plants And Their Application To Successful Floating Treatment Wetlands, Katherine May Mazanec

Masters Theses

“This research aims to mitigate eutrophication of freshwater habitats affected by urban stormwater runoff. Two highly impacted urban ponds near the Missouri S&T campus in Rolla were the focus of this research on the application of floating treatment wetlands (FTWs). An FTW consists of a man-made floating mat that is planted with emergent or floating macrophytes. The plants grow on the mat and their roots extend into the water column below the mat. Plant tissues, especially roots in direct contact with the water, take up nutrients, act as biofilm growth sites, and may facilitate precipitation of nutrients. With urbanization, ponds …

Evaluation Of The Symbiotic Relation Between Endophyte And Poplar Trees Exposed To Landfill Leachate, Catalina Vega Hurtado

Masters Theses

“The contamination of soil and groundwater from leachate leakage from landfill has turned, nowadays, into a global public issue. One of the main concerns about this pollutant is the potential threat to human and ecosystem health. The current research studied endophyte bacteria in association with poplar trees (Populus sp.), as a method of bioremediation of landfill leachates. The objective of the project was to identify treatment strategies that may improve plant performance (survival rates, plant fitness, and degradation efficacy) with the purpose of being implemented in phytoremediation plots, aimed to intercept and treat landfill leachate, before the contamination of watershed. …

Enhancing Models And Measurements Of Traffic-Related Air Pollutants For Health Studies Using Dispersion Modeling And Bayesian Data Fusion, Stuart A. Batterman, Veronica J. Berrocal, Chad Milando, Owais Gilani, Saravanan Arunachalam, K. Max Zhang

Faculty Journal Articles

Research Report 202 describes a study led by Dr. Stuart Batterman at the University of Michigan, Ann Arbor and colleagues. The investigators evaluated the ability to predict traffic-related air pollution using a variety of methods and models, including a line source air pollution dispersion model and sophisticated spatiotemporal Bayesian data fusion methods. Exposure assessment for traffic-related air pollution is challenging because the pollutants are a complex mixture and vary greatly over space and time. Because extensive direct monitoring is difficult and expensive, a number of modeling approaches have been developed, but each model has its own limitations and errors.

Dr. …

Winter Use Of A Rock Crevice By Northern Long-Eared Myotis (Myotis Septentrionalis) In Nebraska, Jeremy A. White, Patricia Freeman, Hans W. Otto, Cliff Lemen

School of Natural Resources: Faculty Publications

We used a combination of acoustic detectors, thermal imaging cameras, and mist netting to confirm the use of a rock crevice by northern long-eared myotis (Myotis septentrionalis) in winter in northeastern Nebraska. Bats roosted in a large crevice in a rock face along the Missouri River, and 5 individuals were captured emerging from the opening of the crevice in March 2017. Our study is the first to confirm the use of a rock-crevice hibernaculum by M. septentrionalis and adds to the growing literature on the winter use of rock crevices by hibernating bats in North America. As white-nose …

The Role Of Topography, Soil, And Remotely Sensed Vegetation Condition Towards Predicting Crop Yield, Trenton E. Franz, Sayli Pokal, Justin P. Gibson, Yuzhen Zhou, Hamed Gholizadeh, Fatima Amor Tenorio, Daran Rudnick, Derek M. Heeren, Matthew F. Mccabe, Matteo Ziliani, Zhenong Jin, Kaiyu Guan, Ming Pan, John Gates, Brian Wardlow

School of Natural Resources: Faculty Publications

Foreknowledge of the spatiotemporal drivers of crop yield would provide a valuable source of information to optimize on-farm inputs and maximize profitability. In recent years, an abundance of spatial data providing information on soils, topography, and vegetation condition have become available from both proximal and remote sensing platforms. Given the wide range of data costs (between USD $0−50/ha), it is important to understand where often limited financial resources should be directed to optimize field production. Two key questions arise. First, will these data actually aid in better fine-resolution yield prediction to help optimize crop management and farm economics? Second, what …

Contaminants Of Emerging Concern: Reconsidering Our Paradigm Of Water Pollution, Jonathan Gunasti

Pomona Senior Theses

In this senior thesis, I explore contaminants of emerging concern (CECs) and endocrine disrupting compounds (EDCs) and discuss the ways in which these novel contaminants defy traditional notions of pollution. I discuss the history and “emergence” of CECs and EDCs in scientific and public spheres and outline ongoing challenges to recognizing, prioritizing, and understanding the action of these contaminants. I position EDCs within the framework of environmental injustice and health disparities and suggest that these compounds could reinforce multigenerational health inequities. Finally, I perform a pilot analysis of the EDC bisphenol A (BPA) in Mt. Baldy Creek, the Los Angeles …

Water For Fish And Farms: An Examination Of Instream Flow Programs In Montana Using Spatially-Explicit Water Rights Data, Anna Leigh Crockett

Graduate Student Theses, Dissertations, & Professional Papers

The state-level institutions governing water use in the western United States have increasingly come under pressure and scrutiny related to their inability to navigate water use conflicts in recent decades. Rapid population growth and shifting public values towards leaving water instream for recreational and environmental purposes pose challenges to Montana water supplies which are predominantly allocated for irrigated agriculture. Additionally, while water scarcity and unpredictable availability are not new dilemmas in Montana, the rate at which climate change is driving shifts in the distribution, timing, and availability of water supplies is unprecedented. Current water policies may not be nimble enough …

Prairie Grouse Population Trends And Their Historical Drivers In The Nebraska Sandhills, Danielle Berger

School of Natural Resources: Dissertations, Theses, and Student Research

The Nebraska Game and Parks Commission (NGPC) has monitored greater prairie-chickens (Tympanuchus cupido pinnatus) and plains sharp-tailed grouse populations (Tympanuchus phasianellus jamesi), collectively known as prairie grouse, since the 1950s using spring breeding ground counts. My research modeled long-term, species-specific spatial and temporal trends of prairie grouse abundance and potential environmental drivers in the Sandhills of Nebraska using NGPC’s historical monitoring data. Prairie-chicken populations have increased since the 1950s while sharp-tailed grouse populations have remained stable or slightly declined. These population trends arise in the context of a dynamic landscape. I created indices representing raptor predation …

Microdialysis: A Method For Quantifying In Situ Nitrogen Fluxes In Soil Microsites, Srusti Maddala, Mary C. Savin, Julie A. Stenken, Lisa S. Wood

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Microdialysis, a diffusion-based sampling technique commonly used in biomedical research, has recently been recognized as a candidate for monitoring chemical changes in the rhizosphere. The information it provides about nutrient diffusion may improve nitrogen use efficiency, leading to enhanced management and success of restoration projects. The objective of this study was to determine the efficacy of microdialysis sampling to quantify the relative recoveries (RR%) of nitrate-N and ammonium-N, the two inorganic nitrogen compounds typically found in soil. The effects of microdialysis flow rate, sample medium concentration, and the presence of both analytes in solution on the relative recoveries obtained from …

Food Waste Knowledge, Attitudes, And Behavioral Intentions Among University Students, Manar Arica Alattar, James Delaney, Jennifer L. Morse, Max Nielsen-Pincus

Environmental Science and Management Faculty Publications and Presentations

After policy change, educational programming has been cited as one of the most powerful tools for improving food systems and decreasing food waste. University students represent a population in which emerging habits, skills, and identity may be targeted easily and changed through on-campus educational programming. To understand how to best implement programming on impacts of food, food waste, and related issues, the factors that underlie students’ behaviors related to food waste must be understood. We analyzed factors that influence food waste–related behaviors within a university student population to understand the potential for improving targeted, school-based food waste diversion programming. Four …

A Modeling Approach To Understanding Glyphosate Transport In The Belize River Watershed, Barbara Anmei Astmann

Theses and Dissertations--Civil Engineering

Glyphosate is the most widely used herbicide worldwide and is often transported from application areas to surface water when solubilized in runoff or sorbed to eroded sediment. There is evidence that suggests both glyphosate and its main metabolite aminomethylphosphonic acid (AMPA) may pose a risk to human health, as well as cause adverse effects in the environment. However, consistent monitoring data is still limited, especially in developing countries. Belize is a developing nation with agriculture being a major sector of its economy and is heavily reliant on glyphosate. The widespread use of glyphosate in Belize may be resulting in glyphosate …

Biogeomorphology Of Bedrock Fluvial Systems: Example From Shawnee Run, Kentucky, Usa, Tasnuba Jerin

Theses and Dissertations--Geography

The dynamic interactions between fluvial processes and vegetation vary in different environments and are uncertain in bedrock settings. Bedrock streams are much less studied than alluvial in all aspects, and in many respects act in qualitatively different ways. This research seeks to fill this lacuna by studying bedrock streams from a biogeomorphic perspective. The first part of this research aims to identify the impacts of woody vegetation that may be common to fluvial systems and rocky hillslopes in general, or that may be unique to bedrock channels. A review of the existing literature on biogeomorphology — mostly fluvial and rocky …

Quantifying Nitrogen Fate In Karst Agroecosystem Streams Of Central Kentucky: Development And Application Of Numerical Modeling And Insight From High-Resolution Sensors, Nolan Lewis Bunnell

Theses and Dissertations--Biosystems and Agricultural Engineering

In-stream fate of nutrients in karst agroecosystems remains poorly understood, despite the known impact of karst on water resources at local to global scales. In the Inner-Bluegrass region of central Kentucky, heterogeneity of karst maturity, flow pathways, and nutrient sources adds to the complexity of quantifying nutrient dynamics, thus requiring novel monitoring and modeling approaches. The significance of these streams is recognized given spring/surface water confluences have been identified as hotspots for biogeochemical transformations. In slow-moving streams high in dissolved inorganic nutrients (particularly dissolved inorganic nitrogen (DIN) and dissolved reactive phosphorus (DRP)), benthic and floating aquatic macrophytes are recognized to …

Climate Triage: A Resources Trust To Address Inequality In A Climate-Changed World, Shi-Ling Hsu

Scholarly Publications

Global climate change poses an existential threat to human civilization because it disrupts the supply of natural resources that provide basic life staples-water, food, and energy. If humankind is unable to adapt to a less abundant and less predictable supply of resources, then the effective scarcity will, as it often has in human history, lead to conflict. There is a chance, if greenhouse gas emissions can be sufficiently reduced to avoid the most serious consequences of climate change, that efficiency and sharing measures can make up for climate-induced shortfalls. Natural resources are not generally managed or consumed very efficiently, so …

Drought Effects On Germination Rate Of Two Sagebrush Species, Artemisia Cana And Artemisia Arbusula, And Comparison Of Seed Counts Using A Photography App And Weighing, Sam S. Kelly, Cessair E. Mckinney

Environmental Science & Management Senior Capstones

Sagebrush steppe ecosystems have been impacted by climate change, grazing, and invasive plants. While some widespread sagebrush species have been well-studied, including big sagebrush (Artemisia tridentata), others like silver sagebrush (Artemisia cana) and low sagebrush (Artemisia arbuscula) are understudied. To learn more about how to restore these important ecosystems, we conducted a germination study of two sagebrush species. We germinated seeds from A. cana in petri plates and in soil to compare the rates of germination in both methods, while A. arbuscula seeds were germinated only in petri plates. We also tested the efficiency …

Global Database Of Ratios Of Particulate Organic Carbon To Thorium-234 In The Ocean: Improving Estimates Of The Biological Carbon Pump, Viena Puigcorbe, Pere Masque, Frederic A.C. Le Moigne

Research outputs 2014 to 2021

The ocean's biological carbon pump (BCP) plays a major role in the global carbon cycle. A fraction of the photosynthetically fixed organic carbon produced in surface waters is exported below the sunlit layer as settling particles (e.g., marine snow). Since the seminal works on the BCP, global estimates of the global strength of the BCP have improved but large uncertainties remain (from 5 to 20 Gt C yr−1 exported below the euphotic zone or mixed-layer depth). The 234Th technique is widely used to measure the downward export of particulate organic carbon (POC). This technique has the advantage of allowing a …

Modeling The Effects Of Hydrologic Service Payments On The Hydrology Of Tropical Montane Watersheds In Central Veracruz, Mexico., Sergio Miguel López Ramírez

Dissertations, Master's Theses and Master's Reports

An analysis of the effects of the Land Use Land Cover (LULC) change and its impacts on the hydrological cycle of tropical montane catchments influenced by cloud forest (TMCF) is developed in Central Veracruz, Mexico. This work started with the analysis of data from monitored-micro-catchments with contrasting LULC. Later the suitability of an improved version of the Soil and Water Assessment Tool model for the Tropics (SWAT-T) was evaluated. Finally, potential future land use scenarios, including conservation targeting alternatives were evaluated using a calibrated Seasonal Water Yield model as part of the Integrated Valuation of Ecosystem Services and Tradeoffs framework …

The Human Dimensions And Spatial Ecology Of Poaching And Implications For Red Wolf Survival, Suzanne Agan

Antioch University Dissertations & Theses

In the 1970’s, red wolves were considered America’s most endangered mammalian species and the US Fish and Wildlife Service (USFWS) developed the Red Wolf Recovery Plan soon after passage of the Endangered Species Act (ESA) to preserve and eventually reintroduce them. It marked the first successful attempt to reintroduce a large predator that had been completely extirpated from the wild. The conservation of predators, such as red wolves, stirs controversy when it hinders human activities and some people retaliate by illegal killing. In Northeastern North Carolina (NENC), poaching has been a problem throughout the entire recovery process and is the …

Decrease In 230th In The Amundsen Basin Since 2007: Far-Field Effect Of Increased Scavenging On The Shelf?, Ole Valk, Michiel M. Rutgers Van Der Loeff, Walter Geibert, Sandra Gdaniec, S. Bradley Moran, Kate Lepore, Robert Lawrence Edwards, Yanbin Lu, Viena Puigcorbé, Nuria Casacuberta, Ronja Paffrath, William Smethie, Matthieu Roy-Barman

Research outputs 2014 to 2021

This study provides dissolved and particulate 230Th and 232Th results as well as particulate 234Th data collected during expeditions to the central Arctic Ocean (GEOTRACES, an international project to identify processes and quantify fluxes that control the distributions of trace elements; sections GN04 and GIPY11). Constructing a time series of dissolved 230Th from 1991 to 2015 enables the identification of processes that control the temporal development of 230Th distributions in the Amundsen Basin. After 2007, 230Th concentrations decreased significantly over the entire water column, particularly between 300 and 1500 m. This decrease is accompanied by a circulation change, evidenced by …

Ecosystem Health In Guánica Bay And La Parguera, Puerto Rico: Remote Sensing Of Ocean Color And Metal Analysis Of Coral Tissue And Surficial Sediments, Jahnelle Howe

Dissertations and Theses

Guánica Bay is an estuary located in southwest Puerto Rico, with a coral reef ecosystem at its periphery. This ecosystem is affected by sediments, nutrients, and contaminants from the watershed through the Bay and into the offshore water. This project evaluates Guánica Bay and La Parguera coastal areas through remote sensing and chemical analysis to assess coastal ecosystem health. The concentration of metals in two coral species and their associated surface sediments was were analyzed by X-ray fluorescence (XRF) and Direct Mercury Analyzer (DMA- 80). Ocean color remote sensing was used to estimate nutrient inputs and phytoplankton biomass through chlorophyll- …

Assessing Threats And Mitigation For Scarlet Ammannia (Ammannia Robusta) In Southwestern Ontario, Kayla Salive

Theses and Dissertations (Comprehensive)

Scarlet Ammannia (Ammannia robusta) is an annual emergent wetland plant of the Lythraceae family. Throughout most of its distribution, the species population is stable under present conditions. However, this is not the case in Canada, where A. robusta is considered endangered with only a few small populations documented in British Columbia and Ontario. In response, a recovery strategy was created for A. robusta outlining the lack of information on the species biology and ecology, with a primary objective to assess the populations in Ontario and gain information on what may be contributing to the species rarity. To assess …

Species Distribution Models For Three Deep-Sea Coral And Sponge Taxa In The Southern California Bight, Nissa Kreidler

Cal Poly Humboldt theses and projects

Deep-Sea Coral and Sponge (DSCS) species are signature taxa of deep-water habitats, however understanding the ecological mechanisms that drive their geographic distributions can be difficult to uncover due to the challenges of surveying deep-water ecosystems. A recent study on benthic assemblages in Southern California revealed statistical associations between several DSCS and demersal fishes, many of which are important to management agencies due to commercial or conservation concerns. Maps that predict where these DSCS may occur are needed for the management and protection of these DSCS taxa and the fauna that rely on them for habitat. In this thesis, I develop …