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Full-Text Articles in Environmental Health and Protection

A Case Study Using 2019 Pre-Monsoon Snow And Stream Chemistry In The Khumbu Region, Nepal, Heather M. Clifford, Mariusz Potocki, Inka Koch, Tenzing Sherpa, Mike Handley, Elena Korotkikh, Douglas Introne, Susan Kaspari, Kimberley Miner, Tom Matthews, Baker Perry, Heather Guy, Ananta Gajurel, Praveen Kumar Singh, Sandra Elvin, Aurora C. Elmore, Alex Tait, Paul A. Mayewski Oct 2021

A Case Study Using 2019 Pre-Monsoon Snow And Stream Chemistry In The Khumbu Region, Nepal, Heather M. Clifford, Mariusz Potocki, Inka Koch, Tenzing Sherpa, Mike Handley, Elena Korotkikh, Douglas Introne, Susan Kaspari, Kimberley Miner, Tom Matthews, Baker Perry, Heather Guy, Ananta Gajurel, Praveen Kumar Singh, Sandra Elvin, Aurora C. Elmore, Alex Tait, Paul A. Mayewski

Geological Sciences Faculty Scholarship

This case study provides a framework for future monitoring and evidence for human source pollution in the Khumbu region, Nepal. We analyzed the chemical composition (major ions, major/trace elements, black carbon, and stable water isotopes) of pre-monsoon stream water (4300–5250 m) and snow (5200–6665 m) samples collected from Mt. Everest, Mt. Lobuche, and the Imja Valley during the 2019 pre-monsoon season, in addition to a shallow ice core recovered from the Khumbu Glacier (5300 m). In agreement with previous work, pre-monsoon aerosol deposition is dominated by dust originating from western sources and less frequently by transport from ...


It Isn't Easy Speaking Green: The Influence Of Moral Factors On The (Non-) Adoption Of Pro-Environmental Behaviors, Deferral, And Back Again, Alexi Elizabeth Lamm Aug 2021

It Isn't Easy Speaking Green: The Influence Of Moral Factors On The (Non-) Adoption Of Pro-Environmental Behaviors, Deferral, And Back Again, Alexi Elizabeth Lamm

All Graduate Theses and Dissertations

Climate change is one of the major issues humans face in the 21st century. This decade is critical in shaping the future of Earth and the way humans live on it (IPCC, 2018). Changes in human behavior are necessary to mitigate and adapt to climate change. This series of studies explored factors important in communicating and implementing environmental behavior. The first study tested the effects of an online, interactive carbon calculator with moral interventions on three self-reported measures and one objective measure of behavior over a period of weeks. The interventions resulted in small changes in self-reported behavior and ...


Should Mangrove Forests Be Used As Coastal Protection For The Gulf Of Mexico From Future Climate Effects: A Look At The Houston Galveston Area., Benjamin L. Weldon May 2021

Should Mangrove Forests Be Used As Coastal Protection For The Gulf Of Mexico From Future Climate Effects: A Look At The Houston Galveston Area., Benjamin L. Weldon

Master's Projects and Capstones

Climate change effects pose a major threat to coastal cities. Sea-level rise and an increase in hurricane intensity will increase the need for protection for these communities. Wetland ecosystems provide key protective services to the cities that lie behind them. Mangroves are a coastal wetland with benefits such as wave attenuation, carbon sequestration, and shoreline management. Mangrove’s habitat range will expand northward as climate change progresses. With a 2-4°C increase in winter temperature extremes black mangroves are projected to be able to inhabit the entire coast of the Gulf of Mexico. The viability of using mangrove forests as ...


Scan Of The Advantage Of Using Biofuels, Ethanol, Ana Carla Bueno May 2021

Scan Of The Advantage Of Using Biofuels, Ethanol, Ana Carla Bueno

Symposium of Student Scholars

The environment is the big sink where all the human waste produced is deposited, mainly the pollutant gases from cars. It is inevitable not to contaminate drinking water, air, and all other ecosystems on the planet, and it was from these concerns that scientists began to develop alternative ways to mitigate the side effects of pollution. Currently, there are many strategies to soften the emission of pollutant gases into the atmosphere, and the biggest competitor of traditional fossil fuel is biofuels. The big challenge in the production of this type of fuel is the competition with the conventional fossil fuel ...


Assessing Hawaiian Climate Resilience Plans On Flood Management, Maggie Chen May 2021

Assessing Hawaiian Climate Resilience Plans On Flood Management, Maggie Chen

Master's Projects and Capstones

Island coastal communities are increasingly vulnerable to climate change impacts, including storms, flooding, and sea-level rise. In 2017, the state of Hawaiʻi saw an unprecedented number of minor flood events due to a combination of higher mean sea levels and seasonal tidal patterns. This research assessed the the climate resilience and adaptation initiatives in Hawaiʻi’s Resilience plans as they address coastal hazards. This research examined the robustness of resilience strategies to flooding due to climate change. This report focused on a community’s resilience to the physical impacts of climate change specifically on flood events and other environmental hazards ...


Farm To Boardroom: How Improving Farm Conditions Leads To Sustained And Ethical Profit, Emily Mueller May 2021

Farm To Boardroom: How Improving Farm Conditions Leads To Sustained And Ethical Profit, Emily Mueller

Student Theses 2015-Present

As a society evolving and innovating at a pace faster than ever before seen in human history, we find ourselves at a crossroads of dealing with planetary boundaries and improving social standards. We are met with a crisis just thirty years away; the crisis of needing to be able to effectively and sustainably feed ten billion people across the globe. The 20th century brought on a booming age for industrializing the food system in order to increase yield and thus profit. The new process was a significant breakthrough at its time, but now we must face the question of when ...


Antibiotic Resistance Gene Dissipation In Soil Microcosms Amended With Antibiotics And Swine Manure, Laura Alt, Alyssa N. Iverson, Michelle L. Soupir, Thomas B. Moorman, Adina Howe May 2021

Antibiotic Resistance Gene Dissipation In Soil Microcosms Amended With Antibiotics And Swine Manure, Laura Alt, Alyssa N. Iverson, Michelle L. Soupir, Thomas B. Moorman, Adina Howe

Agricultural and Biosystems Engineering Publications

The use of antibiotics in animal agriculture has exacerbated the presence of both antibiotic resistance genes (ARGs) and residual antibiotics excreted in animal manure. Field application of this manure is a common practice as its nutrient rich material can benefit crop growth. However, this practice can also introduce antibiotics and ARGs into non-agricultural settings. The integration of prairie buffer strips within and at the edge of crop fields is a potential management solution to reduce concentrations of ARGs commonly transported via water runoff and infiltration. To investigate the fate of ARGs in directly manured crop field soils and surrounding, impacted ...


Microbial Assemblages In Relation To Host And Environmental Surroundings, Mark Fischer May 2021

Microbial Assemblages In Relation To Host And Environmental Surroundings, Mark Fischer

Senior Honors Theses

The goal of this study was to determine if the microbiome between two crayfish microhabitats were different from one other, in addition to the surrounding water and sediment. This project was a field-based study in which all environmental samples and crayfish were collected from a central Virginian freshwater stream. Molecular techniques were employed to sequence bacterial DNA from the various sample types and Qiime 2 was used to analyze statistical differences. The results from this study aligned well with the initial hypothesis in that the alpha-diversities between all of the sample types were statistically different (P<0.05) except for the gill chamber and surrounding water microbial assemblages. In addition, the Beta-diversity was statistically different when the bacterial composition of one sample type was compared to the composition of the other samples (P<0.05). This data aids in our understanding of the significance of microbes within a freshwater ecosystem and how they are distributed among freshwater organisms, such as the crayfish.


Habitat Characteristics Or Protected Area Size: What Is More Important For The Composition And Diversity Of Mammals In Nonprotected Areas?, Wenbo Li, Jinhua Li, Peipei Yang, Bowen Li, Chao Liu, Lixing Sun May 2021

Habitat Characteristics Or Protected Area Size: What Is More Important For The Composition And Diversity Of Mammals In Nonprotected Areas?, Wenbo Li, Jinhua Li, Peipei Yang, Bowen Li, Chao Liu, Lixing Sun

Biology Faculty Scholarship

The margins of protected areas are usually considered to have greater forest degradation, and given that most mammals live outside protected areas, researchers and conservation practitioners are increasingly recognizing that nonprotected areas must be incorporated into conservation strategy. However, the strategy used to manage these areas still involves increasing the size of protected areas, while not considering the habitat characteristics and requirements of the species. In this study, during a 3-year period, camera trap and habitat characteristic surveys were used to estimate composition, diversity, and habitat characteristics of mammals to determine habitat characteristics or increase the size of protected areas ...


Media Analysis Of Coverage Of Environmental Issues In The Midst Of A Pandemic, Alexandria N. Miller, Lucia A. Bolles Apr 2021

Media Analysis Of Coverage Of Environmental Issues In The Midst Of A Pandemic, Alexandria N. Miller, Lucia A. Bolles

Thinking Matters Symposium

This research aimed to answer the question “has the coronavirus impacted the print media’s coverage of important environmental issues?” The research analyzed 2 different print newspapers - The New York Times and the Wall Street Journal - to determine if there was a change in coverage of environmental news as the coronavirus spread in the US. Data for stories published in the first four days of every month from March through September was compiled for 2019 and 2020. Our findings showed a 78.85% decrease in coverage of environmental issues between 2019 and 2020 when stories related to the coronavirus pandemic ...


Data On The Effects Of Persuasive Message Content On Retweet Counts During Natural Hazard Events, Yajie Li, Amanda L. Hughes, Peter D. Howe Apr 2021

Data On The Effects Of Persuasive Message Content On Retweet Counts During Natural Hazard Events, Yajie Li, Amanda L. Hughes, Peter D. Howe

Browse all Datasets

This dataset contains Twitter messages about heat hazards posted by U.S. National Weather Service accounts in 2016. The dataset also contains the retweet counts of the heat-related tweets and whether several types of persuasive message content were included in each tweet. The population and temperature for the forecast area of each sending National Weather Service account are also included.


Impact Of Whitetail Deer Overpopulation With Hunting On The Decline, Matthew J. Lamprinos Apr 2021

Impact Of Whitetail Deer Overpopulation With Hunting On The Decline, Matthew J. Lamprinos

English Department: Research for Change - Wicked Problems in Our World

The whitetail deer is a key species for Pennsylvania’s forests, but their ecological balance has been disturbed by unregulated growth and urban sprawl. The deer population in Pennsylvania has exploded since the 1880’s causing a wide range of damage on the ecosystem, and humans. To reduce deer populations to sustainable levels, the Pennsylvania Game Commission relies heavily on hunters to dedicate time in the fall to go out and fill the tags the they issue. Hunter participation all around the world is decreasing for a variety of reasons. Fewer hunters out in the field causes revenue losses for ...


Healthy Trees – Healthy People: A Model For Engaging Citizen Scientists In Exotic Pest Detection In Urban Parks, Heather Norman-Burgdolf, Lynne K. Rieske Mar 2021

Healthy Trees – Healthy People: A Model For Engaging Citizen Scientists In Exotic Pest Detection In Urban Parks, Heather Norman-Burgdolf, Lynne K. Rieske

Dietetics and Human Nutrition Faculty Publications

Healthy Trees – Healthy People (HT-HP) is an outreach and education program created to enlist and train participants in exotic pest detection while providing them with structured opportunities to connect with urban nature and increase their physical and emotional health. HT- HP creates infrastructure to increase engagement by the urban populace in the urban tree canopy. The program solicits participants to engage in an 8-week intervention designed to expand capacity to detect non-native insect pests and pathogens, while increasing physical activity, raising awareness of healthy lifestyle choices, and improving the health of participants. Program participants were trained in tree and tree ...


Solutions Human Centered Approach To Conservation, Illustration Department, History, Philosophy, And The Social Sciences Department Mar 2021

Solutions Human Centered Approach To Conservation, Illustration Department, History, Philosophy, And The Social Sciences Department

Illustration Course Work & Materials

"These essays were were written and illustrated by students at the Rhode Island school of Design in February, 2021. Their perspectives are entirely personal and reflect their efforts within a 5.5-week fused studio/seminar course that was centered on the Sixth Mass Extinction and how biodiversity is changing because of humans. Discovering that science communication is more than delivering just the facts, students were invited to research a topic of personal interest that is relevant to human impacts on biodiversity. Through analysis of data and other scientific information, each sought to synthesize their research and opinions on their topic ...


Too Little, Too Late: Congress's Attempt To Regulate Forever Chemicals Through Military Appropriations, Michael Heard Snow Feb 2021

Too Little, Too Late: Congress's Attempt To Regulate Forever Chemicals Through Military Appropriations, Michael Heard Snow

William & Mary Environmental Law and Policy Review

Per- and polyfluoroalkyl substances, shortened to “PFAS,” are a broad class of approximately 4,000 to 6,000 industrial chemicals characterized by a carbon chain saturated with fluorine molecules. This structure, dominated by carbon-fluorine bonds, is one of the most stable known chemical structures—and it is this stability that lies at the core of both the usefulness and the greatest issues surrounding PFAS. They are generally non-reactive except at tailored “active sites” and they never break down naturally—leading to the nickname “forever chemicals.” The persistence of their structures creates a plethora of desirable characteristics: PFAS are grease-resistant, waterproof ...


How A Low-Cost Method For Cumulative Water-Sampling Shows Need For Improvement Of Legal Public-Contact Standards In The United States, Samuel Kessler Feb 2021

How A Low-Cost Method For Cumulative Water-Sampling Shows Need For Improvement Of Legal Public-Contact Standards In The United States, Samuel Kessler

Grawemeyer Colloquium Papers

Across the world, it is estimated that 4.5 billion people live near water sources “impaired” for use or contact. Standards for human-interaction are established by international organizations such as the WHO, and legislative bodies from national to local levels with jurisdiction over the quality of our waterways to ensure public & environmental health. Standards are often assessed from “grab-samples” taken from a waterbody at a certain time, with a minimum number analyzed. Water-quality standards in the United States are enforced under the Clean Water Act (CWA) via the Environmental Protection Agency (EPA), applying to “waters of the United States” (WOTUS ...


Carbon Fluxes And Microbial Activities From Boreal Peatlands Experiencing Permafrost Thaw, M. P. Waldrop, J. W. Mcfarland, K. L. Manies, M. C. Leewis, S. J. Blazewicz, M. C. Jones, R. B. Neumann, Jason K. Keller, L. Cohen, E. S. Euskirchen, C. Edgar, M. R. Turetsky, W. L. Cable Feb 2021

Carbon Fluxes And Microbial Activities From Boreal Peatlands Experiencing Permafrost Thaw, M. P. Waldrop, J. W. Mcfarland, K. L. Manies, M. C. Leewis, S. J. Blazewicz, M. C. Jones, R. B. Neumann, Jason K. Keller, L. Cohen, E. S. Euskirchen, C. Edgar, M. R. Turetsky, W. L. Cable

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Permafrost thaw in northern ecosystems may cause large quantities of carbon (C) to move from soil to atmospheric pools. Because soil microbial communities play a critical role in regulating C fluxes from soils, we examined microbial activity and greenhouse gas production soon after permafrost thaw and ground collapse (into collapse‐scar bogs), relative to the permafrost plateau or older thaw features. Using multiple field and laboratory‐based assays at a field site in interior Alaska, we show that the youngest collapse‐scar bog had the highest CH4 production potential from soil incubations, and, based upon temporal changes in porewater ...


Sectional Model Of A Prairie Buffer Strip In A Laboratory Flume For Water Quality Research, Andrew J. Craig, Michelle L. Soupir, Chris R. Rehmann Feb 2021

Sectional Model Of A Prairie Buffer Strip In A Laboratory Flume For Water Quality Research, Andrew J. Craig, Michelle L. Soupir, Chris R. Rehmann

Agricultural and Biosystems Engineering Publications

Vegetative buffers have shown promising results in reducing runoff volume, sediment, nutrients, and manure‐borne contaminants in runoff from agricultural fields. Although these vegetative buffer systems have been extensively tested in field and plot‐scale studies that utilize either natural or simulated rainfall, studies of such systems under highly controlled conditions in the laboratory have been limited. Here, we present the development of a new system for laboratory testing of a full‐scale, sectional, physical model of a new practice under the Continuous Conservation Reserve Program (CRP) Clean Lakes, Estuaries, and Rivers (CLEAR) Initiative, CP‐43 Prairie Strips. This work ...


Plastic Debris In The Laurentian Great Lakes System, North America: Analysis Of Types, Abundances, And Sources, Ian A. Arturo Feb 2021

Plastic Debris In The Laurentian Great Lakes System, North America: Analysis Of Types, Abundances, And Sources, Ian A. Arturo

Electronic Thesis and Dissertation Repository

Understanding plastic pollution in the Laurentian Great Lakes system requires investigation of all plastic debris sizes and categories. Visible polymeric debris (VPD) mainly characterize shorelines, and microplastics (MPs;mm) are found in benthic and beach sediment. Field sampling of VPD from all five Great Lakes, visual and chemical identification of VPD types, and implementation of a matrix scoring technique (MST) indicate that plastic industries, urban areas, and shoreline recreation are major sources of VPD. Sampling for MPs in the St. Clair system, followed by preliminary density separation, and microscopy, suggest that wastewater treatment plants are a major source. This work ...


A Framework For Estimating The United States Depression Burden Attributable To Indoor Fine Particulate Matter Exposure, William L. Taylor, Steven J. Schuldt, Justin D. Delorit, Christopher M. Chini, Teodor T. Postolache, Christopher A. Lowry, Lisa A. Brenner, Andrew J. Hoisington Feb 2021

A Framework For Estimating The United States Depression Burden Attributable To Indoor Fine Particulate Matter Exposure, William L. Taylor, Steven J. Schuldt, Justin D. Delorit, Christopher M. Chini, Teodor T. Postolache, Christopher A. Lowry, Lisa A. Brenner, Andrew J. Hoisington

Faculty Publications

Recently published exploratory studies based on exposure to outdoor fine particulates, defined as particles with a nominal mean diameter less than or equal to 2.5 μm (PM2.5) indicate that the pollutant may play a role in mental health conditions, such as major depressive disorder. This paper details a model that can estimate the United States (US) major depressive disorder burden attributable to indoor PM2.5 exposure, locally modifiable through input parameter calibrations. By utilizing concentration values in an exposure-response function, along with relative risk values derived from epidemiological studies, the model estimated the prevalence of expected ...


The Greta Thunberg Effect: Familiarity With Greta Thunberg Predicts Intentions To Engage In Climate Activism In The United States, Anandita Sabherwal, Matthew T. Ballew, Sander Van Der Linden, Abel Gustafson, Matthew H. Goldberg, Edward W. Maibach, John E. Kotcher, Janet K. Swim, Seth A. Rosenthal, Anthony Leiserowitz Jan 2021

The Greta Thunberg Effect: Familiarity With Greta Thunberg Predicts Intentions To Engage In Climate Activism In The United States, Anandita Sabherwal, Matthew T. Ballew, Sander Van Der Linden, Abel Gustafson, Matthew H. Goldberg, Edward W. Maibach, John E. Kotcher, Janet K. Swim, Seth A. Rosenthal, Anthony Leiserowitz

Psychology Faculty Articles and Research

Despite Greta Thunberg's popularity, research has yet to investigate her impact on the public's willingness to take collective action on climate change. Using cross‐sectional data from a nationally representative survey of U.S. adults (N = 1,303), we investigate the “Greta Thunberg Effect, or whether exposure to Greta Thunberg predicts collective efficacy and intentions to engage in collective action. We find that those who are more familiar with Greta Thunberg have higher intentions of taking collective actions to reduce global warming and that stronger collective efficacy beliefs mediate this relationship. This association between familiarity with Greta Thunberg ...


Beyond Green Cars And Goddesses: Gender, The Global Environment, And Sustainability, Kiran Asher Jan 2021

Beyond Green Cars And Goddesses: Gender, The Global Environment, And Sustainability, Kiran Asher

Sustainability Education Resources

Gender, the environment and sustainability are key terms in debates about economic globalization and social justice. While not new, they are reemerging as part of the post-2015 sustainable development agenda. This course will introduce students to the perceived and existing links between women, gender, and the global environment as they appear in 21st century discussions about sustainable development. Through readings, lectures and discussions will explore the following questions:  When did the environment and sustainability emerge as key biological and social issues on global agendas?  What are their connections to economic globalization? To colonialism and capitalism?  How did women and gender ...


Nebraska Water Center Annual Report 2019-2020 Jan 2021

Nebraska Water Center Annual Report 2019-2020

Literature from The Nebraska Water Center

Contents

Introduction: Foreword • Director’s Letter • Nebraska Water Center (NWC) Overview and Timeline • In Memoriam: Kyle Hoagland

Research • Water Sciences Laboratory • Nebraska Vadose Zone Program • Ogallala Water Coordinated Agriculture Project • Water for Agriculture Project • Greeley Award • U.S. Geological Survey 104b Projects

Extension & Outreach: NWC Events • Nebraska Nitrate Initiative • Bazile Groundwater Management Area • Water and Integrated Crops Hub • Water Faculty Directory • State Legislative Funding • Water Resources Advisory Panel

Teaching: Know Your Well • Sorab Panday Spotlight • NWC Postdoc Profiles • NWC Student Intern Profiles • Water Advanced Research and Innovation Fellowship

Our People: NWC Advisory Board • Staff Listing • Credits


Months-Long Spike In Aqueous Arsenic Following Domestic Well Installation And Disinfection: Short- And Long-Term Drinking Water Quality Implications, Melinda L. Erickson, Elizabeth D. Swanner, Brady A. Ziegler, Jeff R. Havig Jan 2021

Months-Long Spike In Aqueous Arsenic Following Domestic Well Installation And Disinfection: Short- And Long-Term Drinking Water Quality Implications, Melinda L. Erickson, Elizabeth D. Swanner, Brady A. Ziegler, Jeff R. Havig

Geological and Atmospheric Sciences Publications

Exposure to high concentration geogenic arsenic via groundwater is a worldwide health concern. Well installation introduces oxic drilling fluids and hypochlorite (a strong oxidant) for disinfection, thus inducing geochemical disequilibrium. Well installation causes changes in geochemistry lasting 12 + months, as illustrated in a recent study of 250 new domestic wells in Minnesota, north-central United States. One study well had extremely high initial arsenic (1550 µg/L) that substantially decreased after 15 months (5.2 µg/L). The drilling and development of the study well were typical and ordinary; nothing observable indicated the very high initial arsenic concentration. We hypothesized that ...


Soil Response Of Helicopter Liming In The Monongahela National Forest, Jarrett Douglas Fowler Jan 2021

Soil Response Of Helicopter Liming In The Monongahela National Forest, Jarrett Douglas Fowler

Graduate Theses, Dissertations, and Problem Reports

Soils in the Monongahela National Forest (MNF) are acidic due to sandstone parent material, acid deposition, uptake of base cations by vegetation, and release of organic acids by organic matter (OM) decomposition. Increases in soil acidity have caused declines in forest health and changed species composition and nutrient status. Liming can neutralize soil acidity, but no large-scale liming projects have been done on acid forest soils in the USA. In anticipation of acquiring funding for a proposed liming project in the MNF, in 2007 and 2009 10 sites were selected to sample and analyze soils before lime was applied. In ...


Moving Beyond ‘More Crop Per Drop’: Insights From Two Decades Of Research On Agricultural Water Productivity, Meredith Giordano, Susanne M. Scheierling, David O. Tréguer, Hugh Turral, Peter G. Mccornick Jan 2021

Moving Beyond ‘More Crop Per Drop’: Insights From Two Decades Of Research On Agricultural Water Productivity, Meredith Giordano, Susanne M. Scheierling, David O. Tréguer, Hugh Turral, Peter G. Mccornick

Daugherty Water for Food Global Institute: Faculty Publications

Concern over increasing water scarcity has led to the introduction of the concept of agricultural water productivity and an emphasis on interventions to achieve ‘more crop per drop’. Yet, a strong debate continues on how the concept is to be defined and used. Drawing largely from the irrigation literature, the origins of the concept and its methodological developments are reviewed, and its use in applied work over two decades is discussed. Based on this analysis of conceptual and applied research, key insights into the concept’s contributions and limitations are presented, as well as opportunities for further refinements.


Nanomaterials In The Environment, Human Exposure Pathway, And Health Effects: A Review, Arindam Malakar, Sushil R. Kanel, Chittaranjan Ray, Daniel D. Snow, Mallikarjuna N. Nadagouda Jan 2021

Nanomaterials In The Environment, Human Exposure Pathway, And Health Effects: A Review, Arindam Malakar, Sushil R. Kanel, Chittaranjan Ray, Daniel D. Snow, Mallikarjuna N. Nadagouda

Daugherty Water for Food Global Institute: Faculty Publications

Nanomaterials (NMs), both natural and synthetic, are produced, transformed, and exported into our environment daily. Natural NMs annual flux to the environment is around 97% of the total and is significantly higher than synthetic NMs. However, synthetic NMs are considered to have a detrimental effect on the environment. The extensive usage of synthetic NMs in different fields, including chemical, engineering, electronics, and medicine, makes them susceptible to be discharged into the atmosphere, various water sources, soil, and landfill waste. As ever-larger quantities of NMs end up in our environment and start interacting with the biota, it is crucial to understand ...


Assessment Of The Fluoride Concentration In Drinking Water And Tea In The Arusha Region Of Tanzania, Sophia Bakar, David Kahler, Alanna Bachtlin, Kara Okular, Kathleen Glancey, Abbey Whitewood Jan 2021

Assessment Of The Fluoride Concentration In Drinking Water And Tea In The Arusha Region Of Tanzania, Sophia Bakar, David Kahler, Alanna Bachtlin, Kara Okular, Kathleen Glancey, Abbey Whitewood

Environmental Science Datasets

High fluoride concentrations in drinking water affect millions of people around the world; however, fluoride can come from several sources. The World Health Organization recommends a fluoride concentration in drinking water of no more than 1.5 mg/L; fluoride above this concentration can cause long-term problems known as fluorosis, such as mottled teeth and increased risk of dental caries, or skeletal deformities. Rural communities near Arusha, Tanzania have high fluoride concentrations in their water. Adults and children of the Arusha Region rely heavily on tea for daily water consumption, which has the benefit of disinfection by boiling. Researchers investigated ...


The Last Four Decades Of Wildfire Impacts On The Western Joshua Tree (Yucca Brevifolia) In Southern California, Joshua Thompson Jan 2021

The Last Four Decades Of Wildfire Impacts On The Western Joshua Tree (Yucca Brevifolia) In Southern California, Joshua Thompson

Undergraduate Honors Theses

West of the Sierra Nevada Mountain Range, located in southwestern California lives an endemic and very iconic North American Mojave Desert species, the Western Joshua Tree (Yucca brevifolia). The Western Joshua Tree (WJT) is a keystone species in a healthy Mojave Desert ecosystem and provides environmental resources and shelter to species located within it. Over the last 40 years wildfires have been recorded to be one of the most negative factors impacting the WJT by having a high mortality rate in wildfire events and destroying their reproduction efforts. This study was conducted to contribute to a peer reviewed status report ...


Baseflow Nitrate Dynamics Within Nested Watersheds Of An Agricultural Stream In Nebraska, Usa, Galen Richards, Troy E. Gilmore, Aaron R. Mittelstet, Tiffany Messer, Daniel D. Snow Jan 2021

Baseflow Nitrate Dynamics Within Nested Watersheds Of An Agricultural Stream In Nebraska, Usa, Galen Richards, Troy E. Gilmore, Aaron R. Mittelstet, Tiffany Messer, Daniel D. Snow

Daugherty Water for Food Global Institute: Faculty Publications

There is a need to evaluate high surface nitrate concentrations across agricultural watersheds, both spatially and temporally, to increase understanding of source and timing of nitrogen loads in streams and rivers. Bazile Creek is a high-nitrate stream originating in the agriculturally intensive Bazile Groundwater Management Area of Eastern Nebraska, USA. It is a gaining stream that receives groundwater with high nitrate concentrations originating from nonpoint sources. The objective of this study was to determine spatial and temporal variability of baseflow nitrate concentrations in Bazile Creek and its tributaries and to relate this variability to watershed characteristics. Surface-water nitrate samples were ...