Digital Commons Network^™

Industrial Facilities, Public Parks And Community Composition: Examining Environmental Justice In Lincoln, Nebraska, Brynn Stewart

Department of Environmental Studies: Undergraduate Student Theses

Environmental injustice involves the discrimination of low-income or minority populations in regards to environmental conditions in comparison to society at large. This study uses the net-environmental equity concept to analyze the state of environmental justice in the city of Lincoln, Nebraska. To what extent are Lincoln’s environmental burdens located around low-income/minority residents? To what extent are Lincoln’s environmental benefits located away from low-income/minority residents? To what extent do Lincoln’s policies promote environmental justice? A distributional analysis of Lincoln’s public park system and toxic releasing industries is completed along with a policy review. Lincoln’s policies and environmental conditions of minority residents …

Water Quality Comparison Of Minnesota Streams: A Need For Buffer Maintenance, Caitlin Miller

Department of Environmental Studies: Undergraduate Student Theses

A study was conducted to determine the affect riparian buffers have on water quality in perennial streams in southern Minnesota. A report from the Environmental Working Group was used to determine how well each county maintained a 50 ft. buffer on perennial streams. Six counties were chosen from across the southern half of Minnesota, three counties receiving a passing grade from EWG and three receiving a failing grade. The counties were paired (one passing, one failing) based on soil type, stream size, and hydrology. Monthly averages for total suspended solids (TSS) and turbidity were determined over a period of four …

Challenges Associated With Municipal Curbside Recycling In Matsudo City, Chiba, Japan, Jasmine Frazier

Department of Environmental Studies: Undergraduate Student Theses

Improper waste disposal and management globally is linked to a variety of problems with the environment and health. This problem can be addressed by following the 3 R’s; reduce, reuse, and recycle. Japan is continually aiming towards becoming a sustainable, recycling oriented society with the implementation of the 3 R’s, reducing GHG emissions, and innovating new technologies for recycling and waste management. This research aims to expand the knowledge on the challenges and ways to improve curbside recycling systems and to be able to provide suggestions for improvements to the system with input from Japanese middle school students from a …

An Ethical Analysis Of Lethal Control Practices For Invasive Species Management, Avery Messing

Department of Environmental Studies: Undergraduate Student Theses

Non-native species are invading foreign ecosystems at a rate that has never been seen before, and they cause significant damage to these ecosystems. In order to preserve species diversity, these invasive organisms are often eradicated. Typically, conservation biologists run a cost-benefit analysis to determine what action they should take. In this project, I identify the need to also conduct ethical analyses. I chose three scenarios in which invasive species are eradicated: yellow crazy ants on Christmas Island, barred owls in the Pacific Northwest, and leafy spurge in the central United States. Each of these scenarios was analyzed using two ethical …

Riparian Area Vegetation Response To High And Low Flows In The Platte River Through Digital Imagery, Joe Arneson

Department of Environmental Studies: Undergraduate Student Theses

Images can be helpful in explaining different aspects about science that is unfamiliar to some. This study looked at two separate locations on the Platte River through images. High and low flow events were studied at each location. The riparian areas of these two locations were studied. The RGB values of each location and each flow event were used to rank the healthiness of the vegetation and to see how the vegetation responded to the different flows. The results were inconclusive, with no statistically significant answer. It did however look as if the healthiness of the vegetation, as determined by …

The Effects Of Urbanization On Fear In Wildlife, Sarah Spier, Joseph J. Fontaine

Department of Environmental Studies: Undergraduate Student Theses

Through this study we sought out to determine if Fox Squirrels in Lincoln, Nebraska exhibited a change in response to aerial versus terrestrial predators in urban areas. We addressed the possible consequences that human disturbance has on daily stimuli, predator behaviors, and, in turn, prey behaviors. Specifically, the experiment exposed Fox Squirrels to the vocalizations and visual models of an aerial predator, terrestrial predator, and a control species. Squirrels did not show a significant change in behavior between predator types. However, fox squirrels displayed correct anti-predator behaviors by only responding to the predators and not the control. The time it …

Assessing The Effects Of Juniperus Virginiana Removal On Cattle Forage, Elise Jarrett

Department of Environmental Studies: Undergraduate Student Theses

Over the past several decades, expanding eastern red cedar (Juniperus viginiana) populations have altered prairie and grassland ecosystems in the Great Plains, causing a reduction in livestock grazing capacity. This study examined the effects of eastern red cedar removal on cattle forage coverage located on private property in northeastern Nebraska. An analysis of collected field data obtained using a line intercept method in a control and an experimental plot was performed on Elymus canadensis (Canada wild rye), Poa pratensis (Kentucky bluegrass), and Bromus inermis (smooth brome), three common grassland species that serve as forage for cattle.

Results show Canada …

“At-Risk” Food Deserts In Lincoln, Nebraska, Samantha Corr

Department of Environmental Studies: Undergraduate Student Theses

This investigational study conducted in Lincoln, Nebraska seeks to explore the link between geographic and economic barriers to food access. Food access is a problem in the United States. 29 percent of U.S. ZIP codes do not contain a grocery store or supermarket. Families also face barriers to food economically, as low income individuals are less able to afford food. Through the use of ArcGIS 10.2.2 for Desktop software this project seeks to visually represent the areas in which access to food is limited both geographically and financially. Creating one mile buffer zones around each grocery store in Lincoln, Nebraska …

Temperature Dependency Of Population Dynamics And Trophic Cascades In A Model Aquatic System, Reed Brodersen

Department of Environmental Studies: Undergraduate Student Theses

Determining how temperature alters direct predation and indirect trophic cascade effects will be crucial in understanding how global climate change affects community structure and stability. While we are starting to comprehend the effects of warming on individual trophic interactions and underlying mechanisms, effects of warming on multilevel food webs are mostly unknown. This study sought to experimentally observe potential effects of temperature on population and community dynamics, and the magnitude of trophic cascades. To reach these objectives, a three-tiered food web (Scenedesmus, Daphnia and Hydra) was designed, maintained, and observed at two different temperatures (17°C and 21°C) …

Do Adults Who Attend A Family Nature Event Have Correlations Between Environmental Responsible Behaviors, Connection To Nature, And Environmental Attitudes?, Angel Iverson

Department of Environmental Studies: Undergraduate Student Theses

Environmental education is an important way to provide information to the public regarding natural resources, ecosystems, and sustainability. The School of Natural Resources at the University of Nebraska-Lincoln hosts an annual family nature event, NaturePalooza, with the goal to educate families with hands-on activities about the environment, nature, natural resources. My main objectives are to find if there are correlations between environmental responsible behaviors, connection to nature, and environmental attitudes; also to determine if new knowledge is learned and new behaviors willing to be practiced at home. A ten minute survey was provided using Qualtrics online survey system on tablets …

Plant Community Composition And Structure Monitoring For Agate Fossil Beds National Monument, 2014 Annual Report, Michael Prowatzke, Stephen K. Wilson

United States National Park Service: Publications

Abstract

This report presents the results of vegetation monitoring efforts in 2014 at Agate Fossil Beds National Monument (AGFO) by the Northern Great Plains Inventory and Monitoring Network (NGPN).

During the fourth full year of field work, crew members from NGPN visited six plant community monitoring plots to collect data on the vegetation at AGFO. This is part of a long-term monitoring effort that will sample six of 15 randomly located upland plots every year, so that each plot is visited for two consecutive years and then rested for three years, on a five-year rotating basis. NGPN staff captured data …

Plant Community Composition And Structure Monitoring For Scotts Bluff National Monument, 2014 Annual Report, Michael Prowatzke, Stephen K. Wilson

United States National Park Service: Publications

Abstract

This report presents the results of vegetation monitoring efforts in 2014 at Scotts Bluff National Monument (SCBL) by the Northern Great Plains Inventory and Monitoring Network (NGPN).

During the fourth full year of field work, crew members from NGPN visited eight plant community monitoring plots to collect data on the vegetation at SCBL. This is part of a long-term monitoring effort that will sample eight of 20 randomly located upland plots every year, so that each plot is visited for two consecutive years and then rested for three years, on a five-year rotating basis. Additionally, NGPN staff also visited …

The Body Size Dependence Of Trophic Cascades, John Delong, Benjamin Gilbert, Jonathan B. Shurin, Van M. Savage, Brandon T. Barton, Christopher F. Clements, Anthony I. Dell, Hamish S. Greig, Christopher D.G. Harley, Pavel Kratina, Kevin S. Mccann, Tyler D. Tunney, David A. Vasseur, Mary I. O’Connor

School of Biological Sciences: Faculty Publications

Trophic cascades are indirect positive effects of predators on resources via control of intermediate consumers. Larger-bodied predators appear to induce stronger trophic cascades (a greater rebound of resource density toward carrying capacity), but how this happens is unknown because we lack a clear depiction of how the strength of trophic cascades is determined. Using consumer-resource models, we first show that the strength of a trophic cascade has an upper limit set by the interaction strength between the basal trophic group and its consumer and that this limit is approached as the interaction strength between the consumer and its predator increases. …

The Uncertain Climate Footprint Of Wetlands Under Human Pressure, Ana Maria Roxana Petrescu, Annalea Lohila, Juha-Pekka Tuovinen, Dennis D. Baldocchi, Ankur R. Desai, Nigel T. Roulet, Timo Vesala, Albertus Johannes Dolman, Walter C. Oechel, Barbara Marcolla, Thomas Friborg, Janne Rinne, Jaclyn Hatala Matthes, Lutz Merbold, Ana Meijide, Gerard Kiely, Matteo Sottocornola, Torsten Sachs, Donatella Zona, Andrej Varlagin, Derrick Y.F. Lai, Elmar Veenendaal, Frans-Jan W. Parmentier, Ute Skiba, Magnus Land, Arjan Hensen, Jacobus Van Huissteden, Lawrence B. Flanagan, Narasinha J. Shurpali, Thomas Grünwald, Elyn R. Humphreys, Marcin Jackowicz-Korczynski, Mika A. Aurela, Tuomas Laurila, Carsten Grüning, Chiara A.R. Corradi, Arina P. Schrier-Uijl, Torben R. Christensen, Mikkel P. Tamstorf, Mikhail Mastepanov, Pertti J. Martikainen, Shashi Verma, Christian Bernhofer, Alessandro Cescatti

School of Natural Resources: Faculty Publications

Significant climate risks are associated with a positive carbon–temperature feedback in northern latitude carbon-rich ecosystems,making an accurate analysis of human impacts on the net greenhouse gas balance of wetlands a priority. Here, we provide a coherent assessment of the climate footprint of a network of wetland sites based on simultaneous and quasi-continuous ecosystem observations of CO₂ and CH₄ fluxes. Experimental areas are located both in natural and in managed wetlands and cover a wide range of climatic regions, ecosystem types, and management practices. Based on direct observations we predict that sustained CH₄ emissions in natural ecosystems are …

Exploring Ways Social Media Data Inform Public Issues Communication: An Analysis Of Twitter Conversation During The 2012-2013 Drought In Nebraska, Adam Wagler, Karen J. Cannon

Department of Agricultural Leadership, Education, and Communication: Faculty Publications

Social networking sites often are used to maintain close social ties, but increasingly they are used for information and news dissemination, specifically about major events and crises. In 2012, a historic drought struck the Midwest, destroying or damaging portions of major field crops in major agricultural production states. By the end of August 2012, 90% of Nebraska was declared in extreme or exceptional drought, leading to bans on irrigation, damaged crops, and record-low yields as well as damaging the state’s leading economic sector. This case study used social media monitoring and analysis to explore online Twitter conversations related to this …

Gulf Of Mexico Marine Mammal Research And Monitoring Meeting: Summary Report

United States Marine Mammal Commission

Gulf of Mexico Marine Mammal Research and Monitoring Meeting: Summary Report

2015 Academic Program Review School Of Natural Resources University Of Nebraska–Lincoln

School of Natural Resources: Documents and Reviews

No abstract provided.

Piecemeal Reform Of Trade And Environmental Policy When Consumption Also Pollutes, Mark R. Metcalfe, John C. Beghin

Department of Agricultural Economics: Faculty Publications

We incorporate endogenous (price-responsive) consumption pollution into a dual trade model to assess welfare effects of coordinated trade and environmental piecemeal reform in a small, open and distorted economy. Pollution is generated by production and consumption. Producers control the level of pollution and face incentives to abate both types of pollution. We identify sufficient conditions for welfare-improving reforms of trade and environmental policies. An additional domestic environmental policy instrument must be imposed on exportables because of their supply response to foreign environmental taxes.

Trade Restrictiveness Indices In The Presence Of Externalities: An Application To Non-Tariff Measures, John Christopher Beghin, Anne-Célia Disdier, Stéphan Marette

Department of Agricultural Economics: Faculty Publications

We extend the trade restrictiveness indices (TRIs) approach to the case of market failures and domestic regulations addressing them, in presence of arbitrary tariffs and other domestic price policy distortions. We focus on standard-like non-tariff measures (NTMs) affecting cost of production and potentially enhancing domestic demand by increasing product quality or reducing negative externalities. The impact of NTMs on trade is ambiguous depending on the relative strength of the supply cost and demand enhancing effects. We apply the framework to the NTM database of Kee, Nicita, and Olarreaga (2009) and derive ad valorem equivalents for NTMs and other policy distortions. …

Understanding Protected Area Resilience: A Multi-Scale, Social-Ecological Approach, Graeme S. Cumming, Craig R. Allen, Natalie C. Ban, Duan Biggs, Harry C. Biggs, David H. M. Cumming, Alta De Vos, Graham Epstein, Michel Etienne, Kristine Maciejewski, Raphael Mathevet, Christine Moore, Mateja Nenadovic, Michael Schoon

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Protected areas (PAs) remain central to the conservation of biodiversity. Classical PAs were conceived as areas that would be set aside to maintain a natural state with minimal human influence. However, global environmental change and growing cross-scale anthropogenic influences mean that PAs can no longer be thought of as ecological islands that function independently of the broader social-ecological system in which they are located. For PAs to be resilient (and to contribute to broader social-ecological resilience), they must be able to adapt to changing social and ecological conditions over time in a way that supports the long-term persistence of populations, …

Integrating Geoscience Into Undergraduate Education About Environment, Society, And Sustainability Using Place-Based Learning: Three Examples, David Gosselin, Steven Burian, Tim Lutz, Julie Maxson

Department of Earth and Atmospheric Sciences: Faculty Publications

From water to energy, and from climate change to natural hazards, the geosciences (marine, Earth, and atmospheric science) have an important role to play in addressing a wide range of societal issues, with particular relevance to how humans can live sustainably on Earth. Although arguably important to developing solutions for many societal issues, more often than not, students have limited exposure to the geosciences in high school or college. To address this geoscience literacy problem, the Interdisciplinary Teaching of Geoscience for a Sustainable Future (InTeGrate) Talent Expansion Center has engaged members of the geoscience community and their colleagues in allied …

The Effects Of Insecticide Dose And Herbivore Density On Tri-Trophic Effects Of Thiamethoxam In A System Involving Wheat, Aphids, And Ladybeetles, Michael M. Bredeson, R Neil Reese, Jonathan G. Lundgren

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

We assess how herbivore density and insecticide dose affects the tri-trophic interactions among thiamethoxam-treated wheat (Triticum sp.), Rhophalosiphum padi and the predatory Coleomegilla maculata DeGeer. In the first experiment 2nd and 4th instar C. maculata were fed aphids reared for 24 h on wheat plants treated with sub-lethal thiamethoxam soil drenches to assess the effect of insecticidal dose on the predator. In the second experiment a constant, sub-lethal thiamethoxam soil drench was used on wheat plants, but the plants were infested with different densities of aphids. Aphids from each density treatment were then fed to C. maculata 2nd instars. Insecticide …

Globally, Functional Traits Are Weak Predictors Of Juvenile Tree Growth, And We Do Not Know Why, C. E. Timothy Paine, Lucy Amissah, Harald Auge, Christopher Baraloto, Martin Baruffol, Nils Bourland, Helge Bruelheide, Kasso Dainou, Roland C. De Gouvenain, Jean-Louis Doucet, Susan Doust, Paul V. A. Fine, Claire Fortunel, Josephine Haase, Karen D. Holl, Herve Jactel, Xuefei Li, Kaoru Kitajima, Julia Koricheva, Cristina Martinez-Garza, Christian Messier, Alain Paquette, Christopher Philipson, Daniel Piotto, Lourens Poorter, Juan M. Posada, Catherine Potvin, Kalle Rainio, Sabrina E. Russo, Mariacarmen Ruiz-Jaen, Michael Scherer-Lorenzen, Campbell O. Webb, S. Joseph Wright, Rakan A. Zahawi, Andy Hector

School of Biological Sciences: Faculty Publications

1. Plant functional traits, in particular specific leaf area (SLA), wood density and seed mass, are often good predictors of individual tree growth rates within communities. Individuals and species with high SLA, low wood density and small seeds tend to have faster growth rates. 2. If community-level relationships between traits and growth have general predictive value, then similar relationships should also be observed in analyses that integrate across taxa, biogeographic regions and environments. Such global consistency would imply that traits could serve as valuable proxies for the complex suite of factors that determine growth rate, and, therefore, could underpin a …

Growing The Urban Forest: Tree Performance In Response To Biotic And Abiotic Land Management, Emily E. Oldfield, Alexander J. Felson, D.S. Novem Auyeung, Thomas W. Crowther, Nancy F. Sonti, Yoshiki Harada, Daniel S. Maynard, Noah W. Sokol, Mark S. Ashton, Robert J. Warren Ii, Richard A. Hallett, Mark A. Bradford

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Forests are vital components of the urban landscape because they provide ecosystem services such as carbon sequestration, storm-water mitigation, and air-quality improvement. To enhance these services, cities are investing in programs to create urban forests. A major unknown, however, is whether planted trees will grow into the mature, closed-canopied forest on which ecosystem service provision depends. We assessed the influence of biotic and abiotic land management on planted tree performance as part of urban forest restoration in New York City, U.S.A. Biotic treatments were designed to improve tree growth, with the expectation that higher tree species composition (six vs. two) …

Geog 140: Introduction To Human Geography—A Peer Review Of Teaching Project Inquiry Portfolio, Katherine Nashleanas

UNL Faculty Course Portfolios

Large lecture classes of 100 students or more present unique challenges to both teaching and learning. The common method of “delivery” by instructors is lecture, often augmented by a set of Power Point slides; and, while the research literature shows that this is the more traditional way of teaching, increasingly it is becoming apparent that this method of instruction often does not reach students in the way we hope and often assume (Harvard Magazine 2015). Most of the students populating these classes are born of the Digital Age and have different expectations for learning, requiring new approaches in the classroom …

Shifting Perceptions Of Risk And Reward: Dynamic Selection For Human Development By Black Bears In The Western United States, H. E. Johnson, S. W. Breck, S. Baruch-Mordo, D. L. Lewis, C. W. Lackey, K. R. Wilson, J. Broderick, J. S. Mao, J. P. Beckmann

United States Department of Agriculture Wildlife Services: Staff Publications

As landscapes across the globe experience increasing human development, it is critical to identify the behavioral responses of wildlife to this change given associated shifts in resource availability and risk from human activity. This is particularly important for large carnivores as their interactions with people are often a source of conflict, which can impede conservation efforts and require extensive management. To examine the adaptations of a large carnivore to benefits and risks associated with human development we investigated black bear behavior in three systems in the western United States. Our objectives were to (1) identify temporal patterns of selection for …

West Nile Virus Antibody Decay Rate In Free-Ranging Birds, Eileen M. Mckee, Edward D. Walker, Tavis K. Anderson, Uriel D. Kitron, Jeffrey D. Brawn, Bethany L. Krebs, Christina Newman, Marilyn O. Ruiz, Rebecca S. Levine, Mary E. Carrington, Robert G. Mclean, Tony L. Goldberg, Gabriel L. Hamer

United States Department of Agriculture Wildlife Services: Staff Publications

Antibody duration, following a humoral immune response to West Nile virus (WNV) infection, is poorly understood in free-ranging avian hosts. Quantifying antibody decay rate is important for interpreting serologic results and for understanding the potential for birds to serorevert and become susceptible again. We sampled free-ranging birds in Chicago, Illinois, US, from 2005 to 2011 and Atlanta, Georgia, US, from 2010 to 2012 to examine the dynamics of antibody decay following natural WNV infection. Using serial dilutions in a blocking enzymelinked immunosorbent assay, we quantified WNV antibody titer in repeated blood samples from individual birds over time. We quantified a …

The Economic And Tax Revenue Impact Of The Nebraska Wind Energy Industry, Eric Thompson

Bureau of Business Research Publications

This study by the University of Nebraska-Lincoln Bureau of Business Research (UNL-BBR) explores the economic impact from the construction and operation of wind farms in Nebraska, focusing on those farms with 10 or more wind turbines. The study estimates: 1) the statewide economic and tax revenue impact of the Nebraska wind industry as it is currently configured, 2) the local economic and tax revenue impact of the existing industry in the counties where it operates and 3) the potential statewide economic impact from expansion of the industry through the addition of new wind farms.

Table ES.1 summarizes the impacts. Operation …

Enso Teleconnection Pattern Changes Over The Southeastern United States Under A Climate Change Scenario In Cmip5 Models, Ji-Hyun Oh, D.W. Shin, Steven D. Cocke, Guillermo A. Baigorria

School of Natural Resources: Faculty Publications

A strong teleconnection exists between the sea surface temperature (SST) over the tropical Pacific and the winter precipitation in the southeastern United States (SE US).This feature is adopted to validate the fidelity of Coupled Model Intercomparison Project Phase 5 (CMIP5) in this study. In addition, the authors examine whether the teleconnection pattern persists in the future under a global warming scenario. Generally, most of the eight selected models show a positive correlation between November SST over Ni˜no 3 region and December–February (DJF) mean daily precipitation anomalies over the SE US, consistent with the observation. However, the models with poor realization …

Restoration Of Bison (Bison Bison) To Agate Fossil Beds National Monument, A Feasibility Study, Daniel S. Licht

United States National Park Service: Publications

Executive Summary

Agate Fossil Beds National Monument is a 3,057-acre park located in western Nebraska. The unit is comprised of northern mixed-grass prairie vegetation, typical of the Northern Great Plains. Weather, fire, and grazing are generally considered to be the ecological drivers of prairie ecosystems and critical for prairie health. However, grazing has essentially been absent since the 1960s. In 2014, a Department of the Interior report explicitly listed the park as a high priority for bison restoration. This report evaluates the feasibility, management options, benefits, and challenges of restoring bison to Agate Fossil Beds National Monument.

A potential bison …