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Accumulation And Effects Of Dissolved And Nanoparticle Silver And Copper In Two Marine Seaweed Species, Samreen Siddiqui, Gretchen K. Bielmyer-Fraser 2019 Jacksonville University

Accumulation And Effects Of Dissolved And Nanoparticle Silver And Copper In Two Marine Seaweed Species, Samreen Siddiqui, Gretchen K. Bielmyer-Fraser

Georgia Journal of Science

This study investigated the accumulation and effects of metal nanoparticles in two seaweed species, Ulva lactuca and Agardhiella subulata. Both seaweeds were exposed to silver nitrate (AgNO3), silver nanoparticles, and copper oxide (CuO) nanoparticles for 48 h. Metal accumulation occurred in both seaweed species in a concentration-dependent manner after 48 h exposure to each form of metal. In several cases, seaweeds exposed to AgNO3 (the dissolved form) accumulated comparatively higher tissue Ag concentration than seaweed exposed to Ag nanoparticles; and A. subulata had higher tissue Ag concentrations than U. lactuca after exposure to AgNO3 for 48 h ...


Modeled And Measured Ecosystem Respiration In Maize–Soybean Systems Over 10 Years, Ming Zhan, Adam Liska, Anthony Nguy-Robertson, Andrew E. Suyker, Matthew P. Pelton, Haishun Yang 2019 Huazhong Agricultural University

Modeled And Measured Ecosystem Respiration In Maize–Soybean Systems Over 10 Years, Ming Zhan, Adam Liska, Anthony Nguy-Robertson, Andrew E. Suyker, Matthew P. Pelton, Haishun Yang

Adam Liska Papers

Crop residue is an abundant resource for the potential production of biofuels, but a better understanding of its use on net carbon emissions must be developed to mitigate climate change. This analysis combines two established crop growth models (Hybrid-Maize and SoySim) with a simple soil and crop residue respiration model to estimate daily ecosystem respiration (ERe) from maize and soybean; ERe was estimated to be the sum of CO2 emissions from the oxidation of the growing crop, crop residue, and soil organic carbon (SOC). Model-estimated CO2 fluxes from irrigated continuous maize and irrigated maize–soybean cropping systems in ...


Call For Abstracts - Resrb 2019, July 8-9, Wrocław, Poland, Wojciech M. Budzianowski 2018 Wojciech Budzianowski Consulting Services

Call For Abstracts - Resrb 2019, July 8-9, Wrocław, Poland, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.


Lift On E15 Ban: Should Nebraskan Farmers Be Cheering?, Samantha Wattier 2018 University of Nebraska-Lincoln

Lift On E15 Ban: Should Nebraskan Farmers Be Cheering?, Samantha Wattier

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

The common gasoline-ethanol mixture available at gas station pumps is 10% ethanol (E10). The Environmental Protection Agency had a ban on 15% ethanol (E15) during summer months. The news has been covering the talks of President Trump to lifting this summer ban and supporters in Iowa are excited.

Should Nebraska shout Hoorah, too? It is common knowledge Nebraska is better than Iowa. We should be excited, too, right?! NO.

Iowa has been tracking Fuel Revenue sales including those from ethanol blends and has been pushing for the E15 ban lift. Considering Iowa produces MORE corn and MORE ethanol than Nebraska ...


Looking At The True Costs Of Environmental Degradation, Zachery Sehnert 2018 University of Nebraska-Lincoln

Looking At The True Costs Of Environmental Degradation, Zachery Sehnert

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Progress is why we change, and innovation drives that progress. It is already very clear to scientists around the globe that our current framework for living is not sustainable. 97 percent of climate scientists are in consensus that there is a major threat to our ecosystem and action needs to be taken. Overpopulation, pollution, water scarcity, natural disasters, overfishing, deforestation are all issues that must be reevaluated with sustainability in mind. However only 49 percent of the general population share this belief, and even less, only 29 percent of CEOs are actively addressing climate change. The shortcoming for the general ...


“Renewable Energy Implementation”, William Newcomb 2018 University of Nebraska - Lincoln

“Renewable Energy Implementation”, William Newcomb

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Finding and providing ways to produce energy in an environmentally clean way is becoming a major push for countries all around the world today. Renewable energy provides a clean way to produce energy efficiently without using our planets non-renewable resources. Renewable energy has been growing substantially in the United States in the last decade and is making its way towards becoming a major energy production method. So, what is stopping the United States from implementing renewable energy production into our country at a mass scale?

There are many barriers that are keeping renewable energy from becoming a main source of ...


Nebraska’S Public Power Is Proof That Renewables Are (Literally) In The Public’S Best Interest, Jacob Monti 2018 University of Nebraska - Lincoln

Nebraska’S Public Power Is Proof That Renewables Are (Literally) In The Public’S Best Interest, Jacob Monti

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Nebraska is the only state that has every electric utility publicly owned. This gives Nebraska a unique advantage of serving its customers rather than out-of-state shareholders. Since the goal is cheap power instead of profit margins and keeping shareholders happy, Nebraska rates are 16.8% below the national average. (EIA.gov)

So what does that mean for Renewable sources of electricity if cheap power is the main focus? Does cheap but dirty coal reign supreme?

Some might think that’d be a death blow for Renewables. Renewables (wind, solar, and hydro-electric power) are expensive and not profitable, right? WRONG.

Renewables ...


Wave Energy In America, Chris Sukstorf 2018 University of Nebraska - Lincoln

Wave Energy In America, Chris Sukstorf

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

The United States has an untapped energy goldmine: our shores. According to the National Oceanic and Atmospheric Administration (NOAA), the United States his home to over 95,000 miles of shoreline. This shoreline is home to beaches, homes, and wildlife, but it could be home to more: wave energy.

Wave energy comes in many forms: some use the bobbing up and down motion of waves to generate energy in a similar motion of a piston; others store water during high tide and then release it during low tide like a dam. All said and done, the United States has the ...


Why Lincoln Needs To Get Ahead Of The Emerald Ash Borer Outbreak, Bryce Meyer 2018 University of Nebraska-Lincoln

Why Lincoln Needs To Get Ahead Of The Emerald Ash Borer Outbreak, Bryce Meyer

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

The emerald ash borer was recently sighted in Lincoln, Nebraska this August. This was to be expected as they were also located in Douglas and Cass county. The emerald ash borer has been making its way west from Michigan and has also been detected in 61 counties in Iowa.

The emerald ash borer is a metallic green colored beetle that feeds on green ash, black ash, blue ash, and white ash trees. The insect can kill up to 99% of the ash trees that they come in contact with. The beetle is native to north-eastern Asia and is considered an ...


“On-Bill Financing: A Bright Idea For Nebraska”, Lauren Taylor 2018 University of Nebraska-Lincoln

“On-Bill Financing: A Bright Idea For Nebraska”, Lauren Taylor

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

In over 29 states, a program called On-Bill Financing (OBF) is being utilized to improve the energy efficiency of homes and livelihoods of the people living in them. These programs have been implemented all over the country for many years, in states like Colorado, Hawaii, Iowa, and Michigan. According to the Environmental and Energy Study Institute (EESI), OBF has been wildly successful, reducing energy inefficiency, cutting energy bills, and improving the comfort of homes across the country with no upfront costs.

But what exactly is this mysterious money-saving program, and why hasn’t Nebraska tapped into it yet?

The Department ...


Social Change For A Global Problem, Isabella Catalano 2018 University of Nebraska - Lincoln

Social Change For A Global Problem, Isabella Catalano

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Recently, the United Nations' International Panel on Climate Change (IPCC) released a new report[1], warning us that storms are becoming more volatile, sea surface temperatures are getting higher, global environment as a whole growing less predictable: in other words, things are about to get a whole lot worse than we predicted.

Unless, of course, we do something about it. The IPCC recommends cutting CO2 emissions by 45% in order to curb just the worst of climate change's many effects.

There are a plethora of articles on the topic of just what, exactly, we as individuals can do ...


Recycling Just Got More Expensive. Can It Be Done Better?, Zachery Homolka 2018 University of Nebraska-Lincoln

Recycling Just Got More Expensive. Can It Be Done Better?, Zachery Homolka

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

There was a time in history that America led the world in recycling. In World War Two, Americans were asked to recycle tin, steel, paper, and rubber for the war effort. The University of Southern Carolina states that children were so eager to participate, they went door to door collecting recyclable scraps to turn in to be made into tanks, planes, and ammunition. Yet, in 2017 the National Geographic estimated about 91% of plastic produced globally has not been recycled and instead is landfilled or littered into the environment. America is no longer leading the recycling charge, the World Economic ...


Assessing Responses Of Betula Papyrifera To Climate Variability In A Remnant Population Along The Niobrara River Valley In Nebraska U.S. Through Dendroecological And Remote Sensing Techniques, Evan Bumann, Tala Awada, Brian Wardlow, Michael Hayes, Jane A. Okalebo, C. Helzer, Anastasios Mazis, J. Hiller, Paolo Cherubini 2018 University of Nebraska - Lincoln

Assessing Responses Of Betula Papyrifera To Climate Variability In A Remnant Population Along The Niobrara River Valley In Nebraska U.S. Through Dendroecological And Remote Sensing Techniques, Evan Bumann, Tala Awada, Brian Wardlow, Michael Hayes, Jane A. Okalebo, C. Helzer, Anastasios Mazis, J. Hiller, Paolo Cherubini

Papers in Natural Resources

Remnant populations of Betula papyrifera have persisted in the Great Plains after the Wisconsin Glaciation along the Niobrara River Valley, Nebraska. Population health has declined in recent years, and has been hypothesized to be due to climate change. We used dendrochronological techniques to assess the response of B. papyrifera to microclimate (1950-2014), and satellite imagery [Landsat 5 TM (1985-2011) and MODIS (2000-2014)] derived NDVI as a proxy for population health. Growing-season streamflow and precipitation were positively correlated with raw and standardized tree-ring widths and basal area increment increase. Increasing winter and spring temperatures were unfavorable for tree growth while increasing ...


Why The Endangered Species Act Shouldn’T Be Endangered, Ryan Kendall 2018 University of Nebraska-Lincoln

Why The Endangered Species Act Shouldn’T Be Endangered, Ryan Kendall

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

The Trump Administration has announced that they intend to rework the endangered species act. Unsurprisingly, they plan to rework in ways that have the potential to undermine its effectiveness.

One would think that reworking the act would potentially increase its effectiveness, given the nearly fifty years that we have had to advance our knowledge since it was passed. Unfortunately, the opposite may very well be true.

The new changes to the act would allow for the decision of whether or not to list an animal to be made not just by scientific data, but also by determining the economic impact ...


Land Use And Land Cover Changes, And Environment And Risk Evaluation Of Dujiangyan City (Sw China) Using Remote Sensing And Gis Techniques, Biswajit Nath, Zheng Niu, Ramesh P. Singh 2018 Chinese Academy of Sciences

Land Use And Land Cover Changes, And Environment And Risk Evaluation Of Dujiangyan City (Sw China) Using Remote Sensing And Gis Techniques, Biswajit Nath, Zheng Niu, Ramesh P. Singh

Mathematics, Physics, and Computer Science Faculty Articles and Research

Understanding of the Land Use and Land Cover (LULC) change, its transitions and Landscape risk (LR) evaluation in earthquake-affected areas is important for planning and urban sustainability. In the present study, we have considered Dujiangyan City and its Environs (DCEN), a seismic-prone area close to the 2008 Wenchuan earthquake (8.0 Mw) during 2007–2018. Five different multi-temporal data sets for the years 2007, 2008, 2010, 2015, and 2018 were considered for LULC mapping, followed by the maximum likelihood supervised classification technique. The individual LULC maps were further used in four time periods, i.e., 2007–2018, 2008–2018, 2010 ...


Managing For Vegetation Heterogeneity On Rangelands: An Exploration Of Rancher Attitudes, Stephanie Marie Kennedy 2018 University of Nebraska-Lincoln

Managing For Vegetation Heterogeneity On Rangelands: An Exploration Of Rancher Attitudes, Stephanie Marie Kennedy

Dissertations & Theses in Natural Resources

Grasslands provide food, fiber, and numerous ecosystem services to human populations as well as habitat for wildlife. They are also some of the most endangered ecosystems in the world because of their productive soils and open topography. This problem is exacerbated by the accelerating conversion of grassland to cropland and encroaching trees and shrubs. The quality of remaining grasslands will be of increasing importance because of the biodiversity and vital ecosystem services they provide. Heterogeneity is a term specific to rangeland science that is illustrative of grassland health. Grassland species require very specific and differing habitats and without the variation ...


Designing A Protected Area To Safeguard Imperiled Species From Urbanization, Stephanie S. Romanach, Brad Stith, Fred A. Johnson 2018 U.S. Geological Survey, Wetland and Aquatic Research Center

Designing A Protected Area To Safeguard Imperiled Species From Urbanization, Stephanie S. Romanach, Brad Stith, Fred A. Johnson

USGS Staff -- Published Research

Reserve design is a process that can address ecological, social, and political factors to identify parcels of land needed to sustain wildlife populations and other natural resources. Acquisition of parcels for a large terrestrial reserve is difficult because it typically occurs over a long timeframe and thus invokes consideration of future conditions such as climate and urbanization changes. In central Florida, the U.S. government has authorized a new protected area, the Everglades Headwaters National Wildlife Refuge. The new refuge will host important threatened and endangered species and habitats, and will be located to allow for species adaptation from climate ...


Molecular Fossils From Phytoplankton Reveal Secular Pco2 Trend Over The Phanerozoic, Caitlyn R. Witkowski, Johan W. H. Weijers, Brian S. Blais, Stefan Schouten, Jaap S. Sinninghe Damsté 2018 Utrecht University

Molecular Fossils From Phytoplankton Reveal Secular Pco2 Trend Over The Phanerozoic, Caitlyn R. Witkowski, Johan W. H. Weijers, Brian S. Blais, Stefan Schouten, Jaap S. Sinninghe Damsté

Science and Technology Faculty Journal Articles

Past changes in the atmospheric concentration of carbon dioxide (PCO2) have had a major impact on earth system dynamics; yet, reconstructing secular trends of past PCO2 remains a prevalent challenge in paleoclimate studies. The current long-term PCO2reconstructions rely largely on the compilation of many different proxies, often with discrepancies among proxies, particularly for periods older than 100 million years (Ma). Here, we reconstructed Phanerozoic PCO2 from a single proxy: the stable carbon isotopic fractionation associated with photosynthesis (Ɛp) that increases as PCO2 increases. This concept has been widely applied to alkenones, but here, we expand ...


Water, Energy, And Carbon Footprints Of Bioethanol From The U.S. And Brazil, Mesfin Mergia Mekonnen, Thiago L. Romanelli, Chittaranjan Ray, Arjen Y. Hoekstra, Adam Liska, Christopher M. U. Neale 2018 University of Nebraska - Lincoln

Water, Energy, And Carbon Footprints Of Bioethanol From The U.S. And Brazil, Mesfin Mergia Mekonnen, Thiago L. Romanelli, Chittaranjan Ray, Arjen Y. Hoekstra, Adam Liska, Christopher M. U. Neale

Adam Liska Papers

Driven by biofuel policies, which aim to reduce greenhouse gas (GHG) emissions and increase domestic energy supply, global production and consumption of bioethanol have doubled between 2007 and 2016, with rapid growth in corn-based bioethanol in the U.S. and sugar cane-based bioethanol in Brazil. Advances in crop yields, energy use efficiency in fertilizer production, biomass-to-ethanol conversion rates, and energy efficiency in ethanol production have improved the energy balance and GHG emission reduction potential of bioethanol. In the current study, the water, energy, and carbon footprints of bioethanol from corn in the U.S. and sugar cane in Brazil were ...


Groundwater Recharge Response To Reduced Irrigation Pumping In Western Nebraska, Justin Philip Gibson 2018 University of Nebraska-Lincoln

Groundwater Recharge Response To Reduced Irrigation Pumping In Western Nebraska, Justin Philip Gibson

Dissertations & Theses in Natural Resources

Given current and continued investment in irrigation scheduling technologies, a need exists to better estimate the longevity and magnitude of water savings at watershed level to avoid the paradox of irrigation efficiency. This paradox occurs within a watershed as not all irrigation inefficiencies lead to the system losing water. For example, irrigation pumping rates in excess of crop water demand may lead to enhanced groundwater recharge or surface runoff that migrates to a stream. Thus, increases in efficiency may not lead to similar magnitudes of water savings. I hypothesize that water savings longevities are short given previous work demonstrating rapid ...


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