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Articles 331 - 360 of 10267
Full-Text Articles in Physical Sciences and Mathematics
Desalination: Adapting To A Changing Climate And An Increasing Demand For Freshwater, Rebecca A. Acosta
Desalination: Adapting To A Changing Climate And An Increasing Demand For Freshwater, Rebecca A. Acosta
Master's Projects and Capstones
The state of California is just one place in the world that is experiencing an increasing demand for freshwater while also experiencing increasingly hotter conditions and longer periods of drought. There are a number of plants slated for development in the state of California but have been met with resistance from the public with concerns regarding their impacts to the surrounding marine environments. This paper provides background on desalination plants, provides evidence for a potential indicator species, identifies potential impacts to marine environments, and addresses stakeholder concerns and perceptions around desalination plants.
Stormwater To Groundwater: How California Can Increase Groundwater Storage And Build Climate Resilience., Emily M. Perales
Stormwater To Groundwater: How California Can Increase Groundwater Storage And Build Climate Resilience., Emily M. Perales
Master's Projects and Capstones
California is predicted to have more intense and frequent changes in weather patterns within the next 50 years. Historical and current groundwater use for residential and agricultural use is unsustainable and is creating significant deficits in groundwater aquifers throughout the state. To better adapt to potential damages caused by atmospheric rivers, better stormwater management and capture could increase California’s Climate adaptability. This study is focused on the means and methods to capture stormwater and increase groundwater recharge. Nature-based infrastructure (NBI), or Green Infrastructure (GI), has been used in urban areas throughout the country to mitigate harmful stormwater effects by replicating …
Possible Impact Of Additives In Artificial Turf On Aquatic Life In The San Francisco Estuary, Elena Galkina
Possible Impact Of Additives In Artificial Turf On Aquatic Life In The San Francisco Estuary, Elena Galkina
Master's Projects and Capstones
The use of artificial turf fields as a replacement for natural turf has been increasingly promoted as a green solution to reduce water usage, maintenance costs, and the need for pesticides. However, the potential environmental impacts of artificial turf fields are poorly understood, particularly in the context of the San Francisco Estuary, which is one of the largest and most polluted estuaries in the United States. This paper investigates the potential contribution of artificial turf from sports fields to the microplastic and chemical pollution of the San Francisco Estuary during artificial turf’s use and maintenance life stage. The study synthesizes …
Willow Abundance And Condition Mapping In Rocky Mountain National Park, Eric M. Nielsen
Willow Abundance And Condition Mapping In Rocky Mountain National Park, Eric M. Nielsen
Institute for Natural Resources Publications
Riparian and wetland willow species have undergone serious declines in Rocky Mountain National Park as a consequence of a variety of environmental changes and, most recently, damage resulting from moose overpopulation. To address concerns about the long-term status of willows in the park, we developed remote sensing-based raster maps of riparian and wetland willow species presence, canopy cover percentage, canopy height, and leaf area index. All outputs were produced at 3-meter resolution, and represent willows as they existed in 2021. The mapping was performed via random forests classification and regression models trained on several hundred vegetation plots from a variety …
Revisiting The Definition Of Field Capacity As A Functional Parameter In A Layered Agronomic Soil Profile Beneath Irrigated Maize, Paolo Nasta, Trenton E. Franz, Justin P. Gibson, Nunzio Romano
Revisiting The Definition Of Field Capacity As A Functional Parameter In A Layered Agronomic Soil Profile Beneath Irrigated Maize, Paolo Nasta, Trenton E. Franz, Justin P. Gibson, Nunzio Romano
School of Natural Resources: Faculty Publications
The soil water content at the condition of field capacity (θFC) is a key parameter in irrigation scheduling and has been suggested to be determined by running a synthetic drainage experiment until the flux rate (q) at the bottom of the soil profile achieves a predefined negligible value (qFC). We question the impact of qFC on the assessment of field capacity. Moreover, calculating θFC as the integral mean of the water content profile when q is equal to qFC is strictly valid only for uniform soil profiles. By contrast, …
Connecting Social And Ecological Systems In Small-Scale Fisheries In The Philippines, Sara Eisler Marriott
Connecting Social And Ecological Systems In Small-Scale Fisheries In The Philippines, Sara Eisler Marriott
Dissertations
Nearly 50% of all marine fish capture in the Philippines is from artisanal fisheries, most of which is un- or under-reported. As in many emerging nations around the world, the Philippines cannot fully address overfishing by managing only half of the catch that comes from commercial fisheries. Marine reserves are a popular governance strategy for conservation and of growing interest for fisheries management. Many marine reserves in the Philippines, however, are not considered effective. In 2014, Rare, an international NGO, implemented a community-based management program to increase the effectiveness of the marine reserves, and while it found biomass increased, there …
The Influence Of Marsh Edge And Seagrass Habitat On Summer Fish And Macroinvertebrate Recruitment To A Northern Gulf Of Mexico Coastal System, Rebecca Lea Gilpin
The Influence Of Marsh Edge And Seagrass Habitat On Summer Fish And Macroinvertebrate Recruitment To A Northern Gulf Of Mexico Coastal System, Rebecca Lea Gilpin
Theses and Dissertations
Marshes and seagrass beds have been widely recognized as important habitat for estuarine species, but less has been done on how these habitats interact and function together, thereby limiting understanding of the variability of juvenile recruitment to coastal systems. Therefore, the objective of this study was to assess the interaction between fringing marsh and adjacent seagrass for the provision of habitat for juvenile nekton. Weekly seine net and benthic seagrass core sampling from June to November 2020 determine the relationship between nekton and marsh-edge and seagrass habitat. This study shows disparate results, in terms of the effects of proximity to …
Determining The Impact Of Post-Harvest Water Management On Chironomid Abundance, Agrochemical Biomass And Potential Trophic Biomagnification, Mason Thomas
Theses and Dissertations
Agriculture has diminished shorebirds’ natural habitat in the Mississippi Alluvial Valley. Remaining natural stopover sites are supplemented with agricultural fields during the fall and winter. This study evaluates the impact of 4 different post-harvest water management strategies on shorebird food abundance and potential agrochemical biomagnification. Chironomid samples estimated abundance, biomass, and chironomid agrochemical concentration in each field. A risk assessment of agrochemical biomagnification to shorebirds was made across all treatments. Of treatments represented on all study sites, winter treatment had greatest chironomid abundance and biomass. Models indicated that days since flood initiation, start date, and temperature are significant predictors of …
Trade-Offs Between Temperature And Fitness In Euschistus Heros (Fabricius) (Hemiptera: Pentatomidae): Implications For Mass Rearing And Field Management, Ana Paula Frugeri Barrufaldi, Rafael Hayashida, William Wyatt Hoback, Leon G. Higley, Jose Romario De Carvalho, Regiane Cristina De Oliveira
Trade-Offs Between Temperature And Fitness In Euschistus Heros (Fabricius) (Hemiptera: Pentatomidae): Implications For Mass Rearing And Field Management, Ana Paula Frugeri Barrufaldi, Rafael Hayashida, William Wyatt Hoback, Leon G. Higley, Jose Romario De Carvalho, Regiane Cristina De Oliveira
School of Natural Resources: Faculty Publications
The brown stink bug, Euschistus heros (Fabricius, 1798) (Hemiptera: Pentatomidae), is one of the most abundant soybean stink bug pests in Brazil. Temperature is a key factor that affects its development and reproduction, and fluctuating temperatures may impact the development and reproduction of E. heros differently from those under constant temperatures. The objective of this study was to evaluate the influence of constant and fluctuating temperature on the biological characteristics of E. heros in three successive generations. Treatments consisted of six constant temperatures (19oC, 22oC, 25oC, 28oC, 31oC and 34 …
Post Wildfire Vegetation Response To The Wildland-Urban Interface: A Case Study Of The Station Fire, Angelo C. De Guzman, Raju Bista, Parveen K. Chhetri
Post Wildfire Vegetation Response To The Wildland-Urban Interface: A Case Study Of The Station Fire, Angelo C. De Guzman, Raju Bista, Parveen K. Chhetri
CSU Journal of Sustainability and Climate Change
In the past, wildfires served as a method for mother nature to promote biodiversity and to help maintain a functioning ecosystem. However, climate change alters the fire regime, significantly impacting vegetation recovery. Human disturbances and increased land use and land cover heighten vegetation disruption and abundance after a fire. Wildland-urban interface (WUI) – the region where the vegetation intermingles with the roads, houses, and human-made structures – threatens vegetation and the human population. Overall vegetation recovery after the Station Fire of 2009 spread through the San Gabriel Mountains, Los Angeles County was observed using Digital Elevation Model (DEM), Normalized Difference …
Striped Blenny (Chasmodes Bosquianus) Presence And Behavior Between Sunrise And Sunset At Oyster Landing, South Carolina, Madeline Schuetze
Striped Blenny (Chasmodes Bosquianus) Presence And Behavior Between Sunrise And Sunset At Oyster Landing, South Carolina, Madeline Schuetze
Honors Theses
Lunar and diel cycles of fishes can help to interpret their behaviors during their reproductive season. Temperate estuaries are used by many benthic fishes for shelter and reproduction. This study examined the behavior and presence of striped blennies (Chasmodes bosquianus) during diel and lunar cycles. PVC pipe shelters were placed to mimic oyster shell nests, a natural habitat for blennies, and cameras were placed to monitor these shelters in April, May, and June 2022, during the striped blenny reproductive period. Video footage was reviewed and analyzed for the presence and behavior of both male and female blennies. Male presence …
Downstream Hydrochemistry And Irrigation Water Quality Of The Syr Darya, Aral Sea Basin, South Kazakhstan, Bagdat Satybaldiyev, Baimurat Ismailov, Nurbek Nurpeisov, Kairat Kenges, Daniel D. Snow, Arindam Malakar, Omirzhan Taukebayev, Bolat Uralbekov
Downstream Hydrochemistry And Irrigation Water Quality Of The Syr Darya, Aral Sea Basin, South Kazakhstan, Bagdat Satybaldiyev, Baimurat Ismailov, Nurbek Nurpeisov, Kairat Kenges, Daniel D. Snow, Arindam Malakar, Omirzhan Taukebayev, Bolat Uralbekov
Daugherty Water for Food Global Institute: Faculty Publications
New hydrochemical measurements from the Syr Darya provide insights into factors affecting the composition and quality of a major freshwater source replenishing the Aral Sea. This river is heavily used for power and irrigation and crosses territories of four Central Asia republics. It is intensely managed, draining several major tributaries, many reservoirs, and numerous irrigation distribution systems and canals. Analysis of seasonal changes in dissolved ion concentrations using geochemical diagrams, elemental ratios, statistical correlation, and equilibrium modeling allowed the characterization of mineral formation processes that control the dissolved chemical composition. Measured water hydrochemistry and composition type differs substantially from previous …
Prioritizing Professional Development At The Interface Of Natural Resources And Agriculture, Katherine J. Starzec
Prioritizing Professional Development At The Interface Of Natural Resources And Agriculture, Katherine J. Starzec
The Journal of Extension
Continuous professional development is critical for Extension staff, and many agriculture-focused Extension employees are tasked with outreach related to a wide variety of natural resource topics. The purpose of this study is to help prioritize trainings needed by Kansas Extension agents and specialists based on their current level of knowledge and interest in staying up to date on 18 different natural resource topics. Responses to a statewide survey were analyzed using the Borich model. Results indicate priority professional development needs related to soil health; effects of climate; invasive species, harmful algal blooms; and groundwater, surface water, and air quality.
Biodiversity In Eastern Kentucky: Effects Of Habitat Change, Surface Top Mining, And Current Reclamation Practices, Sydney Pardieu
Biodiversity In Eastern Kentucky: Effects Of Habitat Change, Surface Top Mining, And Current Reclamation Practices, Sydney Pardieu
Undergraduate Theses
Biodiversity is a key component in maintaining the valuable ecosystem services that are vital to the way humans interact with and rely on the environment. The Appalachian Region in Eastern North America is one of the most biodiverse temperate broadleaf forests in the world and is home to hundreds of endangered or endemic species. Despite the high biodiversity, the region is also heavily mined, particularly by mountain top removal, causing habitat change and pollution. Current reclamation practices for mined lands are lacking in effective reclamation criterion, and state statutes provide little or no attention to the preservation of biodiversity. Therefore, …
Application Of Screening In Rangeland Monitoring: Quantifying Early-Warning Signals Of State Transitions In Nebraska, Daniel S. Bauloye
Application Of Screening In Rangeland Monitoring: Quantifying Early-Warning Signals Of State Transitions In Nebraska, Daniel S. Bauloye
School of Natural Resources: Dissertations, Theses, and Student Research
Woody encroachment, desertification, and exotic annual grass invasion are regime shifts (i.e., state-transitions) with detrimental effects on ecosystem health and services in grasslands of the North American Great Plains. Traditional approaches to rangeland monitoring are capable of detecting regime shifts after they have already occurred (i.e., diagnosing them); however, proactive management requires earlier warning. Regime shift screening is a new approach to rangeland monitoring capable of providing earlier warning of regime shifts. Regime shift screening proposes assessing the presence, persistence, and non-stationarity of regime shift signals; however, no studies have systematically evaluated these characteristics in real-world landscapes. In this thesis, …
What Are The Impacts Of Deer Browsing And Japanese Stiltgrass (Microstegium Vinenium) On Native Sapling Growth In A Residential Wetland In Southeastern Georgia?, Josie Richards
Honors College Theses
Wetlands promote biodiversity, act as climate stabilizers, and regulate water flow, yet are vulnerable to invaders. An invasive species can affect the biodiversity, abiotic conditions, and increase vulnerability of an ecosystem over time and deer browsing can actively affect new growth by removing the apical buds of young woody vegetation. Japanese stiltgrass (Microstegium vimineum), a wetland specific invader, has been shown to compete against native species for limited resources and actively crowd them out. Growth of native saplings can be further complicated by the presence of white tailed deer (Odocoileus virginianus), which browse woody vegetation and limit recruitment of trees. …
Physiological Distancing Affects Climate Change Through Spatial Differences, Janette Williams
Physiological Distancing Affects Climate Change Through Spatial Differences, Janette Williams
Department of Environmental Studies: Undergraduate Student Theses
Psychological distancing is best described as the human ability to separate ourselves socially, temporally, and spatial and use it to manipulate our perspectives. It is the belief that in order to perceive or understand the information, you have to be within a spatial range(Harvard Business Review,2015). Psychological distancing has been linked to climate change perspectives based on spatial differences. People who are closely affected by climate change and experience more are going to have more ideas and be proactive. The reduced distance by spatial differences correlated with perceptions of climate change. People who are farther from the coast and experience …
The Role Of Gender And Curiosity On Transformational Leadership: A Mixed-Methods Study, Brooke Colleen Mott
The Role Of Gender And Curiosity On Transformational Leadership: A Mixed-Methods Study, Brooke Colleen Mott
School of Natural Resources: Dissertations, Theses, and Student Research
Environmental leaders are tasked with finding innovative solutions to dynamic environmental challenges. Leaders must gain and use new knowledge and experiences that motivate resolving gaps in one’s knowledge (i.e., curiosity) and thereby find forward-thinking solutions. Although curiosity is an integral part of human existence, it may be experienced in various ways. Studies have shown that men and women may possess different leadership styles. Nevertheless, the influence of curiosity on leadership between genders has not been as readily explored. Women exhibit unique characteristics for successful leadership in many contexts, but they are often underrepresented in natural resource management overall. Characteristics of …
Use Of Space And Foraging Behavior Of Loggerhead Shrikes In Urban Areas, Katie Anne Maddox
Use Of Space And Foraging Behavior Of Loggerhead Shrikes In Urban Areas, Katie Anne Maddox
Electronic Theses and Dissertations
Loggerhead shrikes, Lanius ludovicianus, are a declining grassland songbird native to North America. Land-use change has been associated with the decline of grassland bird species. However, the process of urbanization creates novel short-grass habitats reminiscent of shrikes’ natural habitats. Loggerhead shrikes have been observed living in developed areas, particularly in Southeastern coastal states. Understanding the long-term impacts of urban-dwelling on loggerhead shrike populations is vital to identifying whether urban areas offer refuge or act as an ecological sink for shrike populations.
In chapter one, I quantified the use of space by shrikes in urban habitats within Horry County, South …
Development Of Three Novel Edna Assays For Detecting Coastal Sharks, Kristina Dawn Flanigan
Development Of Three Novel Edna Assays For Detecting Coastal Sharks, Kristina Dawn Flanigan
Electronic Theses and Dissertations
Environmental DNA (eDNA) analysis is an emerging, non-invasive community monitoring tool. This study aimed to determine if eDNA methods can be reliably used in a large brackish, partially mixed estuary by developing and testing three novel eDNA primers, for Sandbar Sharks (Carcharhinus plumbeus), Blacknose Sharks (Carcharhinus acronotus), and Bonnetheads (Sphyrna tiburo). These primers were designed to target 109, 156, and 120 base pair (bp) fragments, respectively, of the highly conserved NAD2 gene in the mitochondrial genome of each species. Primer function was validated through testing against 102 known genomic source samples and 25 filtered water samples from aquaria in which …
Correlation Between Fire And Preservation In The Pacific Northwest & Most Cost-Efficient Mitigationtactics, Liam Doherty-Herwitz
Correlation Between Fire And Preservation In The Pacific Northwest & Most Cost-Efficient Mitigationtactics, Liam Doherty-Herwitz
Department of Environmental Studies: Undergraduate Student Theses
This study was conducted entirely online with occasional help from advisors and editors on zoom meetings. I completed the research in Lincoln, Nebraska. A meta analysis of online data has been conducted to form the answers to my hypotheses and research questions. I used specific keywords and phrases in research databases, and search engines such as google scholar to point me towards the answers I was looking for. The keywords and phrases were split up into four different categories which are mitigation techniques, ecosystems, fire severity: PNW, and fire season: PNW. The reason the topics land preservation and fire science …
An Analysis Of Factors Affecting Municipal Biochar Implementation In Voluntary Carbon Markets, Jadon Basilevac
An Analysis Of Factors Affecting Municipal Biochar Implementation In Voluntary Carbon Markets, Jadon Basilevac
Department of Environmental Studies: Undergraduate Student Theses
This paper serves as a review article and incorporates elements of survey research in order to identify and address factors inhibiting biochar availability from municipal sequestration projects in voluntary carbon marketplaces. In determining which barriers exist, and devising strategies for solving them, this study can help to expand the role of biochar in mitigating emissions contributing to climate change, and encourage project developers to support municipal biochar projects that provide various co-benefits. To do so, this study addresses how the pyrolysis production process might be made more efficient, economically viable, and see improved public image, the various urban sectors to …
Observing Wildlife In Different Urban Environments, Colleen Ballinger
Observing Wildlife In Different Urban Environments, Colleen Ballinger
Department of Environmental Studies: Undergraduate Student Theses
My project was about comparing ecological communities in different locations. As many of us Natural Resource studiers know, urbanization has become a prime factor in ecosystems and landscapes of the modern world. Numerous studies from the Urban Ecology field have shown us that urbanization is on an unstable trajectory for the future (Wu 2014). My research will be to find out where and what species of wildlife live in varying levels of urbanization. This topic is important to me because of how impactful habitat loss is to wildlife. Habitat loss is the number one cause of wildlife death here in …
Recycling Attitudes And Behaviors Toward Single-Use Plastics At The University Of Nebraska-Lincoln, Jadyn Chasek
Recycling Attitudes And Behaviors Toward Single-Use Plastics At The University Of Nebraska-Lincoln, Jadyn Chasek
Department of Environmental Studies: Undergraduate Student Theses
Today, single-use plastics pose an issue in the world with pollution from improper disposal as well as from the manufacturing of single-use plastic products. There is a need for change, plastic products have begun to consume the planet and harm life on Earth. Many people look to college universities for an opportunity to change issues such as the overconsumption of single-use plastics. A college campus is the perfect environment to study what changes can be made to fix an issue as well as how to implement those changes. This study was conducted at the University of Nebraska-Lincoln, where the undergraduate …
Spatiotemporal Activity Patterns Of Red Foxes And Coyotes In Wilderness Park, Lincoln, Nebraska., Adam Carlson
Spatiotemporal Activity Patterns Of Red Foxes And Coyotes In Wilderness Park, Lincoln, Nebraska., Adam Carlson
Department of Environmental Studies: Undergraduate Student Theses
Wildlife species that share a landscape may vary their use of time, space, and resources, thereby enabling sympatry between species. Interspecific relationships among sympatric canids are often inferred through temporal and spatial activity patterns. Body size is an important influence on interspecific relationships, as it affects competition, access to prey, resources, and vulnerability to predation. Coyotes and red foxes are canids that differ in body size and occur sympatrically in Wilderness Park, which suggests that they interact and could imply competition. In and around Lincoln, the number of coyote sightings has increased in recent years, Although the ecology of both …
Perception Of Nature Based On Childhood Experiences, Kaitlyn Richards
Perception Of Nature Based On Childhood Experiences, Kaitlyn Richards
Department of Environmental Studies: Undergraduate Student Theses
It is essential that humans view themselves as a part of nature rather than viewing themselves as separate from it. Especially with issues on the rise such as climate change, habitat destruction, and the degradation of natural resources. Childhood experiences with nature are critical in developing pro-environmental behaviors (Duzenli, 2019). Pro-environmental behaviors are defined as attitudes and actions that focus on the improvement of environmental conditions, while also being vigilant of ways to reduce negative impacts on the environment (Tian, 2022).
State Of Utah Et Al. V Walsh Et Al., Ethan Halman Gonzalez
State Of Utah Et Al. V Walsh Et Al., Ethan Halman Gonzalez
Department of Environmental Studies: Undergraduate Student Theses
To expand upon that, the State of Utah et al. wants to show the Department of Labor’s “Prudence and Loyalty in Selecting Plan Investments and Exercising Shareholder Rights” Rule proposed in December 2022, is arbitrary and capricious under the Administrative Procedure Act (APA) and Employment Retirement Income Security Act of 1974 (ERISA). The suit argues that the Department of Labor (DOL) oversteps the APA—as under the APA, the Court “shall… hold unlawful and set aside agency action, findings, and conclusions” that are “in excess of statutory jurisdiction, authority, or limitations,” or “arbitrary capricious, an abuse of discretion, or otherwise not …
Student Perspectives Of Sustainable Transportation Use On A College Campus, Brynn Fuelberth
Student Perspectives Of Sustainable Transportation Use On A College Campus, Brynn Fuelberth
Department of Environmental Studies: Undergraduate Student Theses
As climate change grows in relevance in society, attention has often been turned to large universities to look at what solutions can help minimize the impacts contributing to the devastation. Sustainable transportation is an alternative that can help combat these issues. This study specifically focuses on what sustainable transportation looks like at the University of Nebraska-Lincoln (UNL), and what barriers and motivations are present in the undergraduate students’ eyes. This was investigated through an open-ended qualitative survey administered to the undergraduate population of the UNL. This study asks how students make their mode decisions in relation to sustainable transportation methods, …
Analyzing Sea Level Rise Adaptation & Mitigation Strategies In Louisiana And The Netherlands, Jonah Mcdowell
Analyzing Sea Level Rise Adaptation & Mitigation Strategies In Louisiana And The Netherlands, Jonah Mcdowell
Department of Environmental Studies: Undergraduate Student Theses
Sea level rise is an increasingly dangerous threat. As a byproduct of climate change, this is an issue that has the potential to impact countless people, animals, and ecosystems across the globe. As sea level rise continues to worsen, it is imperative that coastal communities develop their own strategies and plans to combat this problem. This study focuses on two areas, the state of Louisiana and the country of the Netherlands, and studies how they have responded to this problem. These locations were chosen because sea level rise is proportionally more severe at these two locations compared to other areas …
Analyzing The Effects Of Cold Frontal Passage On The Feeding Habits Of Micropterus Salmoides (Largemouth Bass), Ethan Lang
Department of Environmental Studies: Undergraduate Student Theses
For many decades, it has been theorized as to what happens to the feeding habits of largemouth bass (Micropterus Salmoides) when a significant short term weather change occurs. Here in the midwest and all throughout the United States cold front boundaries are a weather phenomenon that occur on a regular basis. They can occur on a very large or small scale and have a rapid effect on the weather locally. These cold front systems have been looked at as one of the main drivers to having an effect on the feeding habits of largemouth. However, up until this point, any …