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School of Natural Resources: Faculty Publications

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Articles 91 - 120 of 1586

Full-Text Articles in Physical Sciences and Mathematics

Flash Drought Typologies And Societal Impacts: A Worldwide Review Of Occurrence, Nomenclature, And Experiences Of Local Populations, D. W. Walker, N. Vergopolan, L. Cavalcante, K. H. Smith, S.M.D. Agounbome, A. Almagro, T. Apurv, N. M. Dahal, D. Hoffman, V. Singh, Z. Xiang Jan 2023

Flash Drought Typologies And Societal Impacts: A Worldwide Review Of Occurrence, Nomenclature, And Experiences Of Local Populations, D. W. Walker, N. Vergopolan, L. Cavalcante, K. H. Smith, S.M.D. Agounbome, A. Almagro, T. Apurv, N. M. Dahal, D. Hoffman, V. Singh, Z. Xiang

School of Natural Resources: Faculty Publications

No abstract provided.


Assessment Of Health Risks Associated With Contaminants In Groundwater In The Catchment Area Of Selected Dumpsites In Abuja North Central Nigeria, A. Omali, J. T. Arogundade, Daniel D. Snow Jan 2023

Assessment Of Health Risks Associated With Contaminants In Groundwater In The Catchment Area Of Selected Dumpsites In Abuja North Central Nigeria, A. Omali, J. T. Arogundade, Daniel D. Snow

School of Natural Resources: Faculty Publications

No abstract provided.


Relation Of Hydrogeology And Contaminant Sources To Drinking Water Quality In Southern Kazakhstan, Z. D. Tleuova, Daniel D. Snow, M. Mukhamedzhanov, A. Ermenbay Jan 2023

Relation Of Hydrogeology And Contaminant Sources To Drinking Water Quality In Southern Kazakhstan, Z. D. Tleuova, Daniel D. Snow, M. Mukhamedzhanov, A. Ermenbay

School of Natural Resources: Faculty Publications

No abstract provided.


Synergistic Use Of Optical And Biophysical Traits To Assess Bromus Inermis Pasture Performance And Quality Under Different Management Strategies In Eastern Nebraska, U.S., A. Mazis, Tala Awada, G. E. Erickson, Brian D. Wardlow, B. J. Wienhold, V. Jin, M. Schmer, Andrew E. Suyker, Y. Zhou, J. Hiller Jan 2023

Synergistic Use Of Optical And Biophysical Traits To Assess Bromus Inermis Pasture Performance And Quality Under Different Management Strategies In Eastern Nebraska, U.S., A. Mazis, Tala Awada, G. E. Erickson, Brian D. Wardlow, B. J. Wienhold, V. Jin, M. Schmer, Andrew E. Suyker, Y. Zhou, J. Hiller

School of Natural Resources: Faculty Publications

No abstract provided.


The Cascading And Compounding Impacts Of Drought, 2023, K. H. Smith, C. Knutson, M. Svoboda Jan 2023

The Cascading And Compounding Impacts Of Drought, 2023, K. H. Smith, C. Knutson, M. Svoboda

School of Natural Resources: Faculty Publications

No abstract provided.


2023 Interior Least Tern And Piping Plover Annual Report For The Lower Platte River, Nebraska, E. F. Forsberg, Mark P. Vrtiska, J. G. Jorgensen Jan 2023

2023 Interior Least Tern And Piping Plover Annual Report For The Lower Platte River, Nebraska, E. F. Forsberg, Mark P. Vrtiska, J. G. Jorgensen

School of Natural Resources: Faculty Publications

No abstract provided.


Cover Crop Performance Under A Changing Climate In Continuous Corn System Over Nebraska, G. Birru, A. Shiferaw, Tsegaye Tadesse, Brian D. Wardlow, V. L. Jin, M. Schmer, Tala Awada, T. Kharel, J. Iqbal Jan 2023

Cover Crop Performance Under A Changing Climate In Continuous Corn System Over Nebraska, G. Birru, A. Shiferaw, Tsegaye Tadesse, Brian D. Wardlow, V. L. Jin, M. Schmer, Tala Awada, T. Kharel, J. Iqbal

School of Natural Resources: Faculty Publications

No abstract provided.


Literature Circles Promote Accountability And Student Engagement With Assigned Reading In A Soil Science Class, Judith Turk Jan 2023

Literature Circles Promote Accountability And Student Engagement With Assigned Reading In A Soil Science Class, Judith Turk

School of Natural Resources: Faculty Publications

No abstract provided.


Transforming Agriculture With Intelligent Data Management And Insights," 2023 Ieee International Conference On Big Data, Y. Pan, J. Sun, H. Yu, G. Bai, Y. Ge, J. Luck, Tala Awada Jan 2023

Transforming Agriculture With Intelligent Data Management And Insights," 2023 Ieee International Conference On Big Data, Y. Pan, J. Sun, H. Yu, G. Bai, Y. Ge, J. Luck, Tala Awada

School of Natural Resources: Faculty Publications

No abstract provided.


On The Economics Of The Transition To A Circular Economy, A. Chennak, K. Giannakas, Tala Awada Jan 2023

On The Economics Of The Transition To A Circular Economy, A. Chennak, K. Giannakas, Tala Awada

School of Natural Resources: Faculty Publications

No abstract provided.


Vegetation Type Is An Important Predictor Of The Arctic Summer Land Surface Energy Budget, Jacqueline Oehri, Gabriela Schaepman-Strub, Jin Soo Kim, Raleigh Grysko, Heather Kropp, Inge Grünberg, Vitalii Zemlianskii, Oliver Sonnentag, Eugénie S. Euskirchen, Merin Reji Chacko, Giovanni Muscari, Peter D. Blanken, Joshua F. Dean, Alcide Di Sarra, Richard J. Harding, Ireneusz Sobota, Lars Kutzbach, Elena Plekhanova, Aku Riihelä, Julia Boike, Nathaniel B. Miller, Jason Beringer, Efrén López-Blanco, Paul C. Stoy, Ryan C. Sullivan, Marek Kejna, Frans Jan W. Parmentier, John A. Gamon, Mikhail Mastepanov, Christian Wille, Marcin Jackowicz-Korczynski, Dirk N. Karger, William L. Quinton, Jaakko Putkonen, Dirk Van As, Torben R. Christensen, Maria Z. Hakuba, Robert S. Stone, Stefan Metzger, Baptiste Vandecrux Dec 2022

Vegetation Type Is An Important Predictor Of The Arctic Summer Land Surface Energy Budget, Jacqueline Oehri, Gabriela Schaepman-Strub, Jin Soo Kim, Raleigh Grysko, Heather Kropp, Inge Grünberg, Vitalii Zemlianskii, Oliver Sonnentag, Eugénie S. Euskirchen, Merin Reji Chacko, Giovanni Muscari, Peter D. Blanken, Joshua F. Dean, Alcide Di Sarra, Richard J. Harding, Ireneusz Sobota, Lars Kutzbach, Elena Plekhanova, Aku Riihelä, Julia Boike, Nathaniel B. Miller, Jason Beringer, Efrén López-Blanco, Paul C. Stoy, Ryan C. Sullivan, Marek Kejna, Frans Jan W. Parmentier, John A. Gamon, Mikhail Mastepanov, Christian Wille, Marcin Jackowicz-Korczynski, Dirk N. Karger, William L. Quinton, Jaakko Putkonen, Dirk Van As, Torben R. Christensen, Maria Z. Hakuba, Robert S. Stone, Stefan Metzger, Baptiste Vandecrux

School of Natural Resources: Faculty Publications

Despite the importance of high-latitude surface energy budgets (SEBs) for land-climate interactions in the rapidly changing Arctic, uncertainties in their prediction persist. Here, we harmonize SEB observations across a network of vegetated and glaciated sites at circumpolar scale (1994–2021). Our variance-partitioning analysis identifies vegetation type as an important predictor for SEB-components during Arctic summer (June-August), compared to other SEB-drivers including climate, latitude and permafrost characteristics. Differences among vegetation types can be of similar magnitude as between vegetation and glacier surfaces and are especially high for summer sensible and latent heat fluxes. The timing of SEB-flux summer-regimes (when daily mean values …


Panarchy Suggests Why Management Mitigates Rather Than Restores Ecosystems From Anthropogenic Impact, David G. Angeler, Ran Hur Nov 2022

Panarchy Suggests Why Management Mitigates Rather Than Restores Ecosystems From Anthropogenic Impact, David G. Angeler, Ran Hur

School of Natural Resources: Faculty Publications

Panarchy, a model of dynamic systems change at multiple, interconnected spatiotemporal scales, allows assessing whether management influences ecological processes and resilience. We assessed whether liming, a management action to counteract anthropogenic acidification, influenced scale-specific temporal fluctuation frequencies of benthic invertebrates and phytoplankton assemblages in lakes. We also tested whether these fluctuations correlated with proxies of liming (Ca:Mg ratios) to quantify scale-specific management effects. Using an ecosystem experiment and monitoring data, time series analyses (1998–2019) revealed significant multiscale temporal (and thus panarchy) structure for littoral invertebrates across limed and reference lakes. Such patterns were inconsistent for sublittoral invertebrates and phytoplankton. When …


Enhanced Photo-Fenton Activity Using Magnetic Cu0.5Mn0.5Fe2O4 Nanoparticles As A Recoverable Catalyst For Degrading Organic Contaminants, Athaphon Angkaew, Chainarong Sakulthaew, Matura Nimtim, Saksit Imman, Tunlawit Satapanajaru, Nopparat Suriyachai, Torpong Kreetachat, Steven Comfort, Chanat Chokejaroenrat Nov 2022

Enhanced Photo-Fenton Activity Using Magnetic Cu0.5Mn0.5Fe2O4 Nanoparticles As A Recoverable Catalyst For Degrading Organic Contaminants, Athaphon Angkaew, Chainarong Sakulthaew, Matura Nimtim, Saksit Imman, Tunlawit Satapanajaru, Nopparat Suriyachai, Torpong Kreetachat, Steven Comfort, Chanat Chokejaroenrat

School of Natural Resources: Faculty Publications

Interest in using various nanoparticle catalysts to activate H2O2 with light for organic contaminant and wastewater treatment is steadily increasing. We successfully synthesized magnetically recoverable Cu0.5Mn0.5Fe2O4 nanoparticles using a simple co-precipitation method followed by melamine-assisted calcination. Material characterization revealed that melamine acted as a coordinating agent during the calcination process that promoted a ferrite structure. Copper (Cu)-substitution effectively decreased material aggregation and promoted catalytic activities. Cu0.5Mn0.5Fe2O4 nanoparticles showed outstanding catalytic performance on several organic contaminants (87.6–100.0% removal within 2 h). Using oxytetracycline (OTC) …


Bison Influences On Composition And Diversity Of Riparian Plant Communities In Yellowstone National Park, J. Boone Kauffman, Dian Lyn Cummings, Cimarron Kauffman, Robert L. Beschta, Jeremy Brooks, Keeley Macneill, William J. Ripple Nov 2022

Bison Influences On Composition And Diversity Of Riparian Plant Communities In Yellowstone National Park, J. Boone Kauffman, Dian Lyn Cummings, Cimarron Kauffman, Robert L. Beschta, Jeremy Brooks, Keeley Macneill, William J. Ripple

School of Natural Resources: Faculty Publications

Riparian zones are among the most biologically diverse ecosystems in the Intermountain West, USA, and provide valuable ecosystem services, including high rates of biotic productivity, nutrient processing, and carbon storage. Thus, their sustainability is a high priority for land managers. Large ungulates affect composition and structure of riparian/stream ecosystems through herbivory and physical effects, via trailing and trampling. Bison (Bison bison) in Yellowstone National Park (YNP) have been characterized as “ecosystem engineers” because of their demonstrated effects on phenology, aboveground productivity of grasses, and woody vegetation structure. Bison have greatly increased in numbers during the last two decades …


Extraction, Analysis, And Occurrence Of Per- And Polyfluoroalkyl Substances (Pfas) In Wastewater And After Municipal Biosolids Land Application To Determine Agricultural Loading, Justin Caniglia, Daniel D. Snow, Tiffany Messer, Shannon Bartelt-Hunt Oct 2022

Extraction, Analysis, And Occurrence Of Per- And Polyfluoroalkyl Substances (Pfas) In Wastewater And After Municipal Biosolids Land Application To Determine Agricultural Loading, Justin Caniglia, Daniel D. Snow, Tiffany Messer, Shannon Bartelt-Hunt

School of Natural Resources: Faculty Publications

Given the ubiquitous detection of per- and polyfluoroalkyl substances (PFAS) within numerous soil and water environmental compartments, there is a need for global understanding of current methodologies for extracting water, solids, polar organic chemical integrative samplers (POCIS), and plant tissue for these substances. This study provides details of several current extraction methods, demonstrates the use of POCIS in monitoring these compounds in a wastewater environment, and provides evidence of detectable levels of certain PFAS compounds within Midwestern municipalities and agroecosystems. Validated extraction procedures help characterize occurrence and release of 18 PFAS in a midwestern wastewater treatment plant (WWTP), surface water, …


Evaluating Optical Remote Sensing Methods For Estimating Leaf Area Index For Corn And Soybean, Rohit Nandan, Varaprasad Bandaru, Jiaying He, Craig Daughtry, Prasanna Gowda, Andrew E. Suyker Oct 2022

Evaluating Optical Remote Sensing Methods For Estimating Leaf Area Index For Corn And Soybean, Rohit Nandan, Varaprasad Bandaru, Jiaying He, Craig Daughtry, Prasanna Gowda, Andrew E. Suyker

School of Natural Resources: Faculty Publications

The leaf area index (LAI) is a key crop biophysical variable influencing many vegetation processes. Spatial LAI estimates are essential to develop and improve spatial modeling tools to monitor vegetation conditions at large regional scales. Numerous optical remote sensing methods have been explored to retrieve crop-specific LAI at a regional scale using satellite observations. However, a major challenge is selecting a method that performance well under various conditions without local scale calibration. As such, we assessed the performance of existing statistical and physical approaches, developed based on parametric, non-parametric and radiative transfer model (RTM)-look-up-table based inversion, using field observations from …


Accuracies Of Field Co2–H2O Data From Open-Path Eddy-Covariance Flux Systems: Assessment Based On Atmospheric Physics And Biological Environment, Xinhua Zhou, Tian Gao, Ning Zheng, Bai Yang, Yanlei Li, Fengyuan Yu, Tala Awada, Jiaojun Zhu Oct 2022

Accuracies Of Field Co2–H2O Data From Open-Path Eddy-Covariance Flux Systems: Assessment Based On Atmospheric Physics And Biological Environment, Xinhua Zhou, Tian Gao, Ning Zheng, Bai Yang, Yanlei Li, Fengyuan Yu, Tala Awada, Jiaojun Zhu

School of Natural Resources: Faculty Publications

Ecosystem CO2–H2O data measured by infrared gas analyzers in open-path eddy-covariance (OPEC) systems have numerous applications, such as estimations of CO2 and H2O fluxes in the atmospheric boundary layer. To assess the applicability of the data for these estimations, data uncertainties from analyzer measurements are needed. The uncertainties are sourced from the analyzers in zero drift, gain drift, cross-sensitivity, and precision variability. These four uncertainty sources are individually specified for analyzer performance, but so far no methodology exists yet to combine these individual sources into a composite uncertainty for the specification of an …


Advancing The Scholarship And Practice Of Stakeholder Engagement In Working Landscapes: A Co‑Produced Research Agenda, Weston M. Eaton, Morey Burnham, Tahnee Robertson, J. G. Arbuckle, Kathryn J. Brasier, Mark E. Burbach, Sarah P. Church, Georgia Hart-Fredeluces, Douglas Jackson-Smith, Grace Wildermuth, Katherine N. Canfield, Carolina Córdova, Casey D. Chatelain, Lara B. Fowler, Mennatullah Mohamed Zein Elabdeen Hendway, Christine J. Kirchhoff, Marisa K. Manheim, Rubén O. Martinez, Anne Mook, Christina A. Mullin, A. Laurie Murrah-Hanson, Christiana O. Onabola, Lauren E. Parker, Elizabeth A. Redd, Chelsea Schelly, Michael L. Schoon, W. Adam Sigler, Emily Smit, Tiff Van Huysen, Michelle R. Worosz, Carrie Eberly, Andi Rogers Oct 2022

Advancing The Scholarship And Practice Of Stakeholder Engagement In Working Landscapes: A Co‑Produced Research Agenda, Weston M. Eaton, Morey Burnham, Tahnee Robertson, J. G. Arbuckle, Kathryn J. Brasier, Mark E. Burbach, Sarah P. Church, Georgia Hart-Fredeluces, Douglas Jackson-Smith, Grace Wildermuth, Katherine N. Canfield, Carolina Córdova, Casey D. Chatelain, Lara B. Fowler, Mennatullah Mohamed Zein Elabdeen Hendway, Christine J. Kirchhoff, Marisa K. Manheim, Rubén O. Martinez, Anne Mook, Christina A. Mullin, A. Laurie Murrah-Hanson, Christiana O. Onabola, Lauren E. Parker, Elizabeth A. Redd, Chelsea Schelly, Michael L. Schoon, W. Adam Sigler, Emily Smit, Tiff Van Huysen, Michelle R. Worosz, Carrie Eberly, Andi Rogers

School of Natural Resources: Faculty Publications

Participatory approaches to science and decision making, including stakeholder engagement, are increasingly common for managing complex socio-ecological challenges in working landscapes. However, critical questions about stakeholder engagement in this space remain. These include normative, political, and ethical questions concerning who participates, who benefits and loses, what good can be accomplished, and for what, whom, and by who. First, opportunities for addressing justice, equity, diversity, and inclusion interests through engagement, while implied in key conceptual frameworks, remain underexplored in scholarly work and collaborative practice alike. A second line of inquiry relates to research–practice gaps. While both the practice of doing engagement …


Fabrication Of Ternary Nanoparticles For Catalytic Ozonation To Treat Parabens: Mechanisms, Efficiency, And Effects On Ceratophyllum Demersum L. And Eker Leiomyoma Tumor-3 Cells, Apiladda Pattanateeradetch, Chainarong Sakulthaew, Athaphon Angkaew, Samak Sutjarit, Thapanee Poompoung, Yao-Tung Lin, Clifford E. Harris, Steven Comfort, Chanat Chokejaroenrat Oct 2022

Fabrication Of Ternary Nanoparticles For Catalytic Ozonation To Treat Parabens: Mechanisms, Efficiency, And Effects On Ceratophyllum Demersum L. And Eker Leiomyoma Tumor-3 Cells, Apiladda Pattanateeradetch, Chainarong Sakulthaew, Athaphon Angkaew, Samak Sutjarit, Thapanee Poompoung, Yao-Tung Lin, Clifford E. Harris, Steven Comfort, Chanat Chokejaroenrat

School of Natural Resources: Faculty Publications

The use of parabens in personal care products can result in their leakage into water bodies, especially in public swimming pools with insufficient water treatment. We found that ferrite-based nanomaterials could catalytically enhance ozone efficiency through the production of reactive oxygen species. Our objective was to develop a catalytic ozonation system using ternary nanocomposites that could minimize the ozone supply while ensuring the treated water was acceptable for disposal into the environment. A ternary CuFe2O4/CuO/Fe2O3 nanocomposite (CF) delivered excellent degradation performance in catalytic ozonation systems for butylparaben (BP). By calcining with melamine, we …


Effects Of Cropland Abandonment And Afforestation On Soil Redistribution In A Small Mediterranean Mountain Catchment, Makki Khorchani, Leticia Gaspar, Estela Nadal-Romero, Jose Arnaez, Teodoro Lasanta, Ana Navas Oct 2022

Effects Of Cropland Abandonment And Afforestation On Soil Redistribution In A Small Mediterranean Mountain Catchment, Makki Khorchani, Leticia Gaspar, Estela Nadal-Romero, Jose Arnaez, Teodoro Lasanta, Ana Navas

School of Natural Resources: Faculty Publications

In slopes of Mediterranean mid-mountain areas, land use and land cover changes linked to the abandonment of cropland activity affect soil quality and degradation and soil redistribution; however, limited attention has been paid to this issue at catchment scale. This paper evaluates the effects of cropland abandonment and post-land abandonment management (through natural revegetation and afforestation) on soil redistribution rates using fallout 137Cs measurements in the Araguás catchment (0.45 km2 , Central Spanish Pyrenees). A total of 52 soil core samples, distributed in a regular grid, from the first 30 -40 cm and 9 sectioned reference samples were …


The Emergence Of Convergence, Shana M. Sundstrom, David G. Angeler, Jessica G. Ernakovich, Jorge H. Garcıá, Joseph A. Hamm, Orville Huntington, Craig R. Allen Oct 2022

The Emergence Of Convergence, Shana M. Sundstrom, David G. Angeler, Jessica G. Ernakovich, Jorge H. Garcıá, Joseph A. Hamm, Orville Huntington, Craig R. Allen

School of Natural Resources: Faculty Publications

Science is increasingly a collaborative pursuit. Although the modern scientific enterprise owes much to individuals working at the core of their field, humanity is increasingly confronted by highly complex problems that require the integration of a variety of disciplinary and methodological expertise. In 2016, the U.S. National Science Foundation launched an initiative prioritizing support for convergence research as a means of “solving vexing research problems, in particular, complex problems focusing on societal needs.” We discuss our understanding of the objectives of convergence research and describe in detail the conditions and processes likely to generate successful convergence research. We use our …


Using Airborne And Desis Imaging Spectroscopy To Map Plant Diversity Across The Largest Contiguous Tract Of Tallgrass Prairie On Earth, Hamed Gholizadeh, Adam P. Dixon, Kimberly H. Plan, Nicholas A. Mcmillan, Rober G. Hamilton, Samuel D. Fuhlendorf, Jeannine Cavender-Bares, John A. Gamon Sep 2022

Using Airborne And Desis Imaging Spectroscopy To Map Plant Diversity Across The Largest Contiguous Tract Of Tallgrass Prairie On Earth, Hamed Gholizadeh, Adam P. Dixon, Kimberly H. Plan, Nicholas A. Mcmillan, Rober G. Hamilton, Samuel D. Fuhlendorf, Jeannine Cavender-Bares, John A. Gamon

School of Natural Resources: Faculty Publications

Grassland ecosystems are under threat globally, primarily due to land-use and land-cover changes that have adversely affected their biodiversity. Given the negative ecological impacts of biodiversity loss in grasslands, there is an urgent need for developing an operational biodiversity monitoring system that functions in these ecosystems. In this paper, we assessed the capability of airborne and spaceborne imaging spectroscopy (also known as hyperspectral imaging) to capture plant α-diversity in a large naturally-assembled grassland while considering the impact of common management practices, specifically prescribed fire. We collected a robust insitu plant diversity data set, including species composition and percent cover from …


Arima-Based Forecasting Of The Effects Of Wildfire On The Increasing Tree Cover Trend And Recurrence Interval Of Woody Encroachment In Grazing Land, Mazbahul Ahamad Sep 2022

Arima-Based Forecasting Of The Effects Of Wildfire On The Increasing Tree Cover Trend And Recurrence Interval Of Woody Encroachment In Grazing Land, Mazbahul Ahamad

School of Natural Resources: Faculty Publications

Invasive tree removal from grazing lands using costly brush management practices is widely employed. However, wildfire-like natural events can prevent the increasing trend of woody tree encroachment in grazing lands at no cost, instead of cost-oriented prescribed burning. This study aims to estimate the effects of wildfire in 2002 on woody tree encroachment trends during the post-wildfire period (2003–20), as well as the recurrence interval of the encroachment of a wildfire site in the United States. An autoregressive integrated moving average (ARIMA) model was employed to forecast the tree cover during the post-wildfire period. We found that the pre-wildfire tree …


Unraveling The Effects Of Management And Climate On Carbon Fluxes Of U.S. Croplands Using The Usda Long-Term Agroecosystem (Ltar) Network, D. Menefee, Russell L. Scott, M. Abraha, J. G. Alfieri, J. Baker, Dawn M. Browning, Jiquan Chen, Jeff Gonet, J. M. F. Johnson, G. R. Miller, Rachel Nifong, Phil Robertson, E. S. Russell, N. Saliendra, Adam P. Schreiner-Mcgraw, Andrew E. Suyker, P. Wagle, Chris Wente, P. M. White, Doug Smith Sep 2022

Unraveling The Effects Of Management And Climate On Carbon Fluxes Of U.S. Croplands Using The Usda Long-Term Agroecosystem (Ltar) Network, D. Menefee, Russell L. Scott, M. Abraha, J. G. Alfieri, J. Baker, Dawn M. Browning, Jiquan Chen, Jeff Gonet, J. M. F. Johnson, G. R. Miller, Rachel Nifong, Phil Robertson, E. S. Russell, N. Saliendra, Adam P. Schreiner-Mcgraw, Andrew E. Suyker, P. Wagle, Chris Wente, P. M. White, Doug Smith

School of Natural Resources: Faculty Publications

Understanding the carbon fluxes and dynamics from a broad range of agricultural systems has the potential to improve our ability to increase carbon sequestration while maintaining crop yields. Short-term, single-location studies have limited applicability, but long-term data from a network of many locations can provide a broader understanding across gradients of climate and management choices. Here we examine eddy covariance measured carbon dioxide (CO2) fluxes from cropland sites across the United States Department of Agriculture’s Long-Term Agroecosystem Research (LTAR) network. The dataset was collected between 2001 and 2020, spanning 13 sites for a total of 182 site-years. Average …


Using Sentinel-2 Imagery And Machine Learning Algorithms To Assess The Inundation Status Of Nebraska Conservation Easements During 2018–2021, Ligang Zhang, University Of Nebraska-Lincoln, Zhenghong Tang Sep 2022

Using Sentinel-2 Imagery And Machine Learning Algorithms To Assess The Inundation Status Of Nebraska Conservation Easements During 2018–2021, Ligang Zhang, University Of Nebraska-Lincoln, Zhenghong Tang

School of Natural Resources: Faculty Publications

Conservation easements (CEs) play an important role in the provision of ecological services. This paper aims to use the open-access Sentinel-2 satellites to advance existing conservation management capacity to a new level of near-real-time monitoring and assessment for the conservation easements in Nebraska. This research uses machine learning and Google Earth Engine to classify inundation status using Sentinel-2 imagery during 2018–2021 for all CE sites in Nebraska, USA. The proposed machine learning approach helps monitor the CE sites at the landscape scale in an efficient and low-cost manner. The results confirmed effective inundation performance in these floodplain or wetland-related CE …


Estimating The Burden Of Heat-Related Illness Morbidity Attributable To Anthropogenic Climate Change In North Carolina, Jagadeesh Puvvula, Azar M. Abadi, Kathryn C. Conlon, Jared J. Rennie, Stephanie C. Herring, Laurie Thie, Max J. Rudolph, Rebecca Owen, Jesse E. Bell Sep 2022

Estimating The Burden Of Heat-Related Illness Morbidity Attributable To Anthropogenic Climate Change In North Carolina, Jagadeesh Puvvula, Azar M. Abadi, Kathryn C. Conlon, Jared J. Rennie, Stephanie C. Herring, Laurie Thie, Max J. Rudolph, Rebecca Owen, Jesse E. Bell

School of Natural Resources: Faculty Publications

Climate change is known to increase the frequency and intensity of hot days (daily maximum temperature ≥30°C), both globally and locally. Exposure to extreme heat is associated with numerous adverse human health outcomes. This study estimated the burden of heat-related illness (HRI) attributable to anthropogenic climate change in North Carolina physiographic divisions (Coastal and Piedmont) during the summer months from 2011 to 2016. Additionally, assuming intermediate and high greenhouse gas emission scenarios, future HRI morbidity burden attributable to climate change was estimated. The association between daily maximum temperature and the rate of HRI was evaluated using the Generalized Additive Model. …


Using Electrochemical Oxidation To Remove Pfas In Simulated Investigation-Derivedwaste (Idw): Laboratory And Pilot-Scale Experiments, Amy Yanagida, Elise Webb, Clifford E. Harris, Mark Christenson, Steven Comfort Aug 2022

Using Electrochemical Oxidation To Remove Pfas In Simulated Investigation-Derivedwaste (Idw): Laboratory And Pilot-Scale Experiments, Amy Yanagida, Elise Webb, Clifford E. Harris, Mark Christenson, Steven Comfort

School of Natural Resources: Faculty Publications

Repeated use of aqueous firefighting foams at military aircraft training centers has contaminated groundwater with per and polyfluorinated alkyl substances (PFAS). To delineate the extent of PFAS contamination, numerous site investigations have occurred, which have generated large quantities of investigation-derived wastes (IDW). The commonly used treatment of incinerating PFAS-tainted IDW is costly, and was recently suspended by the Department of Defense. Given long-term IDW storage in warehouses is not sustainable, our objective was to use electrochemical oxidation to degrade PFAS in contaminated water and then scale the technology toward IDW treatment. This was accomplished by conducting a series of laboratory …


Collateral Damage From Agricultural Netting To Open-Country Bird Populations In Thailand, Rongrong Angkaew, Philip D. Round, Dusit Ngoprasert, Larkin A. Powell Aug 2022

Collateral Damage From Agricultural Netting To Open-Country Bird Populations In Thailand, Rongrong Angkaew, Philip D. Round, Dusit Ngoprasert, Larkin A. Powell

School of Natural Resources: Faculty Publications

Nets are used across a wide variety of food production landscapes to control avian pests typically resulting in deaths of entangled birds. However, the impact of nets on bird populations is a human–wildlife conflict that remains mostly unquantified. Here, we examined the scale of netting in the central plains of Thailand, a region dominated by ricefields, among which aquaculture ponds are increasingly interspersed. Nets/exclusion types, number of individual birds and species caught were recorded on 1312 road-survey transects (2-km length × 0.4-km width). We also interviewed 104 local farmers. The transect sampling took place in late- September 2020, and from …


Effects Of Spatially Heterogeneous Lakeside Development On Nearshore Biotic Communities In A Large, Deep, Oligotrophic Lake, Michael F. Meyer, Ted Ozersky, Kara H. Woo, Kirill Shchapov, Aaron W. E. Galloway, Julie B. Schram, Emma J. Rosi, Daniel D. Snow, Maxim A. Timofeyev, Dmitry Yu. Karnaukhov, Matthew R. Brousil, Stephanie E. Hampton Aug 2022

Effects Of Spatially Heterogeneous Lakeside Development On Nearshore Biotic Communities In A Large, Deep, Oligotrophic Lake, Michael F. Meyer, Ted Ozersky, Kara H. Woo, Kirill Shchapov, Aaron W. E. Galloway, Julie B. Schram, Emma J. Rosi, Daniel D. Snow, Maxim A. Timofeyev, Dmitry Yu. Karnaukhov, Matthew R. Brousil, Stephanie E. Hampton

School of Natural Resources: Faculty Publications

Sewage released from lakeside development can reshape ecological communities. Nearshore periphyton can rapidly assimilate sewage-associated nutrients, leading to increases of filamentous algal abundance, thus altering both food abundance and quality for grazers. In Lake Baikal, a large, ultra-oligotrophic, remote lake in Siberia, filamentous algal abundance has increased near lakeside developments, and localized sewage input is the suspected cause. These shifts are of particular interest in Lake Baikal, where endemic littoral biodiversity is high, lakeside settlements are mostly small, tourism is relatively high (~1.2 million visitors annually), and settlements are separated by large tracts of undisturbed shoreline, enabling investigation of heterogeneity …


Evaluating The Sensitivity Of Heatwave Definitions Among North Carolina Physiographic Regions, Jagadeesh Puvvula, Azar M Abadi, Kathryn C. Conlon, Jared J. Rennie, Hunter Jones, Jesse E. Bell Aug 2022

Evaluating The Sensitivity Of Heatwave Definitions Among North Carolina Physiographic Regions, Jagadeesh Puvvula, Azar M Abadi, Kathryn C. Conlon, Jared J. Rennie, Hunter Jones, Jesse E. Bell

School of Natural Resources: Faculty Publications

Exposure to extreme heat is a known risk factor that is associated with increased heat-related illness (HRI) outcomes. The relevance of heat wave definitions (HWDs) could change across health conditions and geographies due to the heterogenous climate profile. This study compared the sensitivity of 28 HWDs associated with HRI emergency department visits over five summer seasons (2011–2016), stratified by two physiographic regions (Coastal and Piedmont) in North Carolina. The HRI rate ratios associated with heat waves were estimated using the generalized linear regression framework assuming a negative binomial distribution. We compared the Akaike Information Criterion (AIC) values across the HWDs …