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Articles 4021 - 4050 of 18629
Full-Text Articles in Entire DC Network
Cigarette Butt Disposal Behavior: A Case Study Of A Public Beach On Jekyll Island, Georgia, Usa, Maranda R. Miller, Mark E. Burbach
Cigarette Butt Disposal Behavior: A Case Study Of A Public Beach On Jekyll Island, Georgia, Usa, Maranda R. Miller, Mark E. Burbach
School of Natural Resources: Faculty Publications
Improperly discarded cigarette butts are a substantial environmental problem. This study explored factors influencing cigarette butt discarding behavior on a public beach on Jekyll Island, Georgia, USA. A mixed-mode design utilized quantitative and qualitative data to study improper cigarette butt disposal. We surveyed smokers regarding their place attachment, environmental attitudes, environmental awareness, and habit as predictors of improper cigarette butt disposal. Environmental attitudes, environmental awareness, and habits were significant predictors of improper cigarette butt disposal behavior. A qualitative inquiry further explored the phenomenon of cigarette butt disposal from the smokers’ perspectives. Interviews illustrated that “improper disposers” experienced themes involving uncertainty …
Nutrient Cycling In Forage Production Systems, David A. Wedin, Michael P. Russelle
Nutrient Cycling In Forage Production Systems, David A. Wedin, Michael P. Russelle
School of Natural Resources: Faculty Publications
In most forage production systems, the nutrients needed for plant growth are provided by the microbially-mediated breakdown and release of plant-available mineral nutrients from dead plant tissues, livestock excreta, soil organic matter, and geochemically-bound mineral forms. Even in fertilized forage systems, determining appropriate fertilizer or manure application rates requires a “systems” approach on the part of the manager (Rotz et al. 2005; Wood et al. 2012). Fertilizer additions are simply one input in the system of inputs, outputs, pools, and fluxes that characterize nutrient cycling in a particular ecosystem.
Decoding The Corn Field: Building Third-Grade Students’ Ideas About Plant Inheritance And Variation, D. Cisterna, E. Ingram, D. Bhattacharya, R. Roy, C. Forbes
Decoding The Corn Field: Building Third-Grade Students’ Ideas About Plant Inheritance And Variation, D. Cisterna, E. Ingram, D. Bhattacharya, R. Roy, C. Forbes
School of Natural Resources: Faculty Publications
No abstract provided.
Drought Management Norms: Is The Middle East And North Africa (Mena) Region Managing Risks Or Crises?, T. Jedd, C. Knutson, M. Hayes, M. Svoboda, S. Fragaszy, M. Belhaj Fraj, R. Mcdonnell
Drought Management Norms: Is The Middle East And North Africa (Mena) Region Managing Risks Or Crises?, T. Jedd, C. Knutson, M. Hayes, M. Svoboda, S. Fragaszy, M. Belhaj Fraj, R. Mcdonnell
School of Natural Resources: Faculty Publications
No abstract provided.
Ecotour Guide Training Program Characteristics And Methods: A Case Study From The African Bush, N.Q. Lackey, L. Pennisi
Ecotour Guide Training Program Characteristics And Methods: A Case Study From The African Bush, N.Q. Lackey, L. Pennisi
School of Natural Resources: Faculty Publications
No abstract provided.
Peregrine Falcon Survival Rates Derived From A Long-Term Study At A Migratory And Overwintering Area In Coastal Washington, D.E. Varland, L.A. Powell, J.B. Buchanan, T.L. Fleming, C. Vanier
Peregrine Falcon Survival Rates Derived From A Long-Term Study At A Migratory And Overwintering Area In Coastal Washington, D.E. Varland, L.A. Powell, J.B. Buchanan, T.L. Fleming, C. Vanier
School of Natural Resources: Faculty Publications
No abstract provided.
Effects Of Liberalizing Harvest Regulations On Canada Goose (Branta Canadensis) Demography In Nebraska, T. Lyons, L. Powell, M. Vrtiska
Effects Of Liberalizing Harvest Regulations On Canada Goose (Branta Canadensis) Demography In Nebraska, T. Lyons, L. Powell, M. Vrtiska
School of Natural Resources: Faculty Publications
No abstract provided.
Nc3 Nebraska Climate Summary, M. Shulski
Nc3 Nebraska Climate Summary, M. Shulski
School of Natural Resources: Faculty Publications
No abstract provided.
Genetic And Evolutionary Considerations Of The Chronic Wasting Disease – Human Species Barrier, Robert M. Zink
Genetic And Evolutionary Considerations Of The Chronic Wasting Disease – Human Species Barrier, Robert M. Zink
School of Natural Resources: Faculty Publications
Transmissible spongiform encephalopathies can jump species barriers. In relatively few cases is the possible route of transmission thought to be known, mostly involving humans, cattle and sheep. It is thought that sheep might be the cause of Bovine Spongiform Encephalopathy (BSE) and Chronic Wasting Disease (CWD) in cervids, and that humans might have gotten prion disease (e.g., vCJD) from eating meat from BSE+ cows. A looming societal question is whether humans will acquire a prion disease from ingesting prions from CWD+ deer. On an evolutionary tree of the PRNP gene in mammals, deer, sheep and cow are relatively closely related, …
A Review Of Vegetation Phenological Metrics Extraction Using Time-Series, Multispectral Satellite Data, Linglin Zeng, Brian D. Wardlow, Daxiang Xiang, Shun Hu, Deren Li
A Review Of Vegetation Phenological Metrics Extraction Using Time-Series, Multispectral Satellite Data, Linglin Zeng, Brian D. Wardlow, Daxiang Xiang, Shun Hu, Deren Li
School of Natural Resources: Faculty Publications
Vegetation dynamics and phenology play an important role in inter-annual vegetation changes in terrestrial ecosystems and are key indicators of climate-vegetation interactions, land use/land cover changes, and variation in year-to-year vegetation productivity. Satellite remote sensing data have been widely used for vegetation phenology monitoring over large geographic domains using various types of observations and methods over the past several decades. The goal of this paper is to present a detailed review of existing methods for phenology detection and emerging new techniques based on the analysis of time-series, multispectral remote sensing imagery. This paper summarizes the objective and applications of detecting …
Feeding Behavior Fundamentally Affects Micro-Particle Intake In Mangrove Crabs, Rola Alsharif
Feeding Behavior Fundamentally Affects Micro-Particle Intake In Mangrove Crabs, Rola Alsharif
Scientific Communication News
No abstract provided.
Human Vs. Bear: Who Needs Salmon More?, Brittany N. Savercool
Human Vs. Bear: Who Needs Salmon More?, Brittany N. Savercool
Scientific Communication News
No abstract provided.
Battle For The Top: Killer Whales Vs. White Sharks, Michael P. Mcdonough
Battle For The Top: Killer Whales Vs. White Sharks, Michael P. Mcdonough
Scientific Communication News
No abstract provided.
Can Ocean Modeling Help Predict Where Cold-Stunned Sea Turtles Wash Up?, Mikayla L. Twiss
Can Ocean Modeling Help Predict Where Cold-Stunned Sea Turtles Wash Up?, Mikayla L. Twiss
Scientific Communication News
No abstract provided.
Machine Learning Provides A Much-Needed Solution For Marine Mammal Protection, Shaman Patel
Machine Learning Provides A Much-Needed Solution For Marine Mammal Protection, Shaman Patel
Scientific Communication News
No abstract provided.
Ghost Fishing In Coral Reef Ecosystems, Katherine E. Meurer
Ghost Fishing In Coral Reef Ecosystems, Katherine E. Meurer
Scientific Communication News
No abstract provided.
Flamboyant Cuttlefish: Camouflage Tactics And Colorful Behavior, Shaquilla M. Hamlett
Flamboyant Cuttlefish: Camouflage Tactics And Colorful Behavior, Shaquilla M. Hamlett
Scientific Communication News
No abstract provided.
Effects Of Surface Heterogeneity Due To Drip Irrigation On Scintillometer Estimates Of Sensible, Latent Heat Fluxes And Evapotranspiration Over Vineyards, Hatim M. E. Geli, José González-Piqueras, Christopher M. U. Neale, Claudio Balbontín, Isidro Campos, Alfonso Calera
Effects Of Surface Heterogeneity Due To Drip Irrigation On Scintillometer Estimates Of Sensible, Latent Heat Fluxes And Evapotranspiration Over Vineyards, Hatim M. E. Geli, José González-Piqueras, Christopher M. U. Neale, Claudio Balbontín, Isidro Campos, Alfonso Calera
Daugherty Water for Food Global Institute: Faculty Publications
Accurate estimates of sensible (H) and latent (LE) heat fluxes and actual evapotranspiration (ET) are required for monitoring vegetation growth and improved agricultural water management. A large aperture scintillometer (LAS) was used to provide these estimates with the objective of quantifying the effects of surface heterogeneity due to soil moisture and vegetation growth variability. The study was conducted over drip-irrigated vineyards located in a semi-arid region in Albacete, Spain during summer 2007. Surface heterogeneity was characterized by integrating eddy covariance (EC) observations of H, LE and ET; land surface temperature (LST) and normalized difference vegetation index (NDVI) data from Landsat …
Treenuts And Groundnuts In The Eat-Lancet Reference Diet: Concerns Regarding Sustainable Water Use, Davy Vanhama, Mesfin Mekonnen, Arjen Y. Hoekstra
Treenuts And Groundnuts In The Eat-Lancet Reference Diet: Concerns Regarding Sustainable Water Use, Davy Vanhama, Mesfin Mekonnen, Arjen Y. Hoekstra
Daugherty Water for Food Global Institute: Faculty Publications
The EAT-Lancet universal healthy reference diet recommends an increase in the consumption of healthy foods, among which treenuts and groundnuts. Both are, however, water-intensive products, with a large water footprint (WF) per unit of mass and protein and already today contribute to blue water stress in different parts of the world. The envisaged massive required increase in nut production to feed a global population with this reference diet, needs to occur in a water-sustainable way. In this paper, we identify and quantify where current nut production contributes to local blue water stress and discuss options for water-sustainable nut production. We …
Stormwater Management Model Analysis On The Effectiveness Of Low Impact Development Controls For Suburban Lid Designs In Brookings, South Dakota, Anne M. Salazar
Stormwater Management Model Analysis On The Effectiveness Of Low Impact Development Controls For Suburban Lid Designs In Brookings, South Dakota, Anne M. Salazar
Civil and Environmental Engineering Graduate Students Plan B Capstone Projects
Urbanization’s influence the features of a watershed’s subcatchments. The soil’s low permeability causes a decrease in infiltration and storage and an increase in runoff. The management of peak runoff and stormwater quality must follow SCMs. LID controls provide natural practices for handling stormwater management. This study used the LID controls of traditional drainage, vegetative swales, and bioretention cells to handle the runoff quantity and quality resulting from a 5-year storm event and a 100-year storm event. The SWMM modelled and analyzed the effectiveness of each model to remove the most of three pollutant loads: TSS, lead, and nitrate. When compared …
Impacts Of Beef Concentrated Animal Feeding Operations On Environmental Sustainability In The United States And Practices For Improvement, Laura Clark
VCU Phi Kappa Phi Award Winners
The geographic concentration of beef concentrated animal feeding operations [CAFOs] has changed the landscape of environmental sustainability for agriculture in the United States. As land availability has decreased, operations have struggled to maintain feasible practices to minimize environmental detriment. The United States Environmental Protection Agency [EPA] imposed rules to be followed as a means of mitigation, but the fast-paced rate of change minimizes effectiveness. The overall environmental sustainability of beef CAFOs has shifted from historical rates, leading to a need for reassessment. Part of this reassessment will include stronger environmental practices to be considered for implementation. I explored the role …
Into The River Activity: Beaver Craft, University Of Dayton. Rivers Institute
Into The River Activity: Beaver Craft, University Of Dayton. Rivers Institute
Rivers Institute Publications
Elementary-age craft using cardboard tube and construction paper.
Into The River Activity: Eagle Craft, University Of Dayton. Rivers Institute
Into The River Activity: Eagle Craft, University Of Dayton. Rivers Institute
Rivers Institute Publications
Elementary-age craft using cardboard tube and construction paper.
Ecowomanism: A Solution To Climate And Social Injustice, Alexis K. Karon
Ecowomanism: A Solution To Climate And Social Injustice, Alexis K. Karon
Religion: Student Scholarship & Creative Works
The interconnections of climate justice and social inequalities are paired together in a concept named 'Ecowomanism'. Originally inspired by Melanie L. Harris, ecowomanism uses spiritual theologies, experiences, and memories to discuss the post-modern struggles that women of African and indigenous descent face in society, which can then find solutions to such injustices in a reconnection to nature. In this paper, I argue that adopting an environmental paradigm inspired by the spiritual theology of ecowomanism in the United States, which acknowledges the connection between oppression and violence against communities of color to the violence and domination of the environment, a more …
Ecowomanism: A Solution To Climate And Social Injustice, Alexis K. Karon
Ecowomanism: A Solution To Climate And Social Injustice, Alexis K. Karon
Theological Investigations
The interconnections of climate justice and social inequalities are paired together in a concept named 'Ecowomanism'. Originally inspired by Melanie L. Harris, ecowomanism uses spiritual theologies, experiences, and memories to discuss the post-modern struggles that women of African and indigenous descent face in society, which can then find solutions to such injustices in a reconnection to nature. In this paper, I argue that adopting an environmental paradigm inspired by the spiritual theology of ecowomanism in the United States, which acknowledges the connection between oppression and violence against communities of color to the violence and domination of the environment, a more …
Computational Assessment Of Aortic Valve Function And Mechanics Under Hypertension, Saurav Kadel
Computational Assessment Of Aortic Valve Function And Mechanics Under Hypertension, Saurav Kadel
Browse all Theses and Dissertations
Calcific aortic valve disease (CAVD), the most common valvular heart disorder, is associated with complications such as stroke, heart attack, aortic aneurysm, left ventricular hypertrophy, and ultimately death. While hypertension has been identified as a major risk factor for CAVD, the mechanisms by which it may promote calcification are still unknown. Given the sensitivity of valvular tissue to mechanical stress alterations, the hemodynamic abnormalities linked to hypertension may play a role in the development of CAVD. Further, the effects of hypertension on the left ventricular functionality and coronary flow resistance remain largely uninvestigated. Hence, the objectives of this thesis were …
The Hydrostatics And Hydrodynamics Of Prominent Heteromorph Ammonoid Morphotypes And The Functional Morphology Of Ammonitic Septa, David Joseph Peterman
The Hydrostatics And Hydrodynamics Of Prominent Heteromorph Ammonoid Morphotypes And The Functional Morphology Of Ammonitic Septa, David Joseph Peterman
Browse all Theses and Dissertations
Ammonoid cephalopods have chambered shells that regulated buoyancy. The morphology of their shells strongly influenced the physical properties acting on these animals during life. Heteromorph ammonoids, which undergo changes in coiling throughout ontogeny, are the focus of this dissertation. The biomechanics of these cephalopods are investigated in a framework involving functional morphology, paleoecology, and possible modes of life. Constructional constraints were investigated for the marginally-corrugated septal walls within the chambered ammonoid shell. These constraints governed the positive relationship between septal complexity and terminal size. Furthermore, increased septal complexity facilitated liquid retention via surface tension. More complex septa would have increased …
Measuring The Occurrence Of Antibiotics In Surface Water Adjacent To Cattle Grazing Areas Using Passive Samplers, Nasrin Naderi Beni, Daniel D. Snow, Elaine D. Berry, Aaron R. Mittelstet, Tiffany Messer, Shannon L. Bartelt-Hunt
Measuring The Occurrence Of Antibiotics In Surface Water Adjacent To Cattle Grazing Areas Using Passive Samplers, Nasrin Naderi Beni, Daniel D. Snow, Elaine D. Berry, Aaron R. Mittelstet, Tiffany Messer, Shannon L. Bartelt-Hunt
Nebraska Water Center: Faculty Publications
A wide variety of antibiotics and other pharmaceuticals are used in livestock production systems and residues passed to the environment, often unmetabolized, after use and excretion. Antibiotic residuesmay be transported frommanure-treated soils via runoff and are also capable of reaching surface and groundwater systems through a variety of pathways. The occurrence and persistence of antibiotics in the environment is a concern due to the potential for ecological effects and proliferation of environmental antibiotic resistance in pathogenic organisms. In the present study, the occurrence and seasonal variation of 24 commonly-used veterinary antibiotics was evaluated in surface water adjacent to several livestock …
Dredging Activity And Associated Sound Have Negligible Effects On Adult Atlantic Sturgeon Migration To Spawning Habitat In A Large Coastal River, Matthew Balazik, Michael Barber, Safra Altman, Kevin Reine, Alan Katzenmeyer, Aaron Bunch, Greg Garman
Dredging Activity And Associated Sound Have Negligible Effects On Adult Atlantic Sturgeon Migration To Spawning Habitat In A Large Coastal River, Matthew Balazik, Michael Barber, Safra Altman, Kevin Reine, Alan Katzenmeyer, Aaron Bunch, Greg Garman
Rice Rivers Center Research
Dredging is considered a major threat/impedance to anadromous fish migrating to spawning habitat. Due to the perceived threat caused by dredging, environmental windows that restrict dredge operations are enforced within many rivers along the east coast. However, it is generally unknown how anadromous fish react to encountering an active dredge during spawning migrations. Atlantic sturgeon (ATS) are an endangered, anadromous species along the Atlantic slope of North America. To determine if and how an active dredge may affect ATS spawning migration, a Vemco Positioning System array was deployed around an active hydraulic-cutterhead dredge that adult ATS must traverse to reach …
Similar Bird Communities Across Grazing Systems In The Nebraska Sandhills, M. Sliwinski, L.A. Powell, W. Schacht
Similar Bird Communities Across Grazing Systems In The Nebraska Sandhills, M. Sliwinski, L.A. Powell, W. Schacht
School of Natural Resources: Faculty Publications
No abstract provided.