Physical Sciences and Mathematics Commons^™

Evaluation Of Aggregate Stability Methods For Soil Health, E. L. Reike, D. K. Bagnall, C.L.S. Morgan, K. D. Flynn, Andrew E. Suyker Et Al.

School of Natural Resources: Faculty Publications

No abstract provided.

Selecting Soil Hydraulic Properties As Indicators Of Soil Health: Measurement Response To Management And Site Characteristics, D. K. Bagnall, C.L.S. Morgan, G. Mac Bean, D. Liptzin, Andrew E. Suyker Et Al.

School of Natural Resources: Faculty Publications

No abstract provided.

Power-Function Expansion Of The Polynomial Complementary Relationship Of Evaporation, Jozsef Szilagyi, N. Ma, R. Crago, R. Qualls

School of Natural Resources: Faculty Publications

No abstract provided.

Comment On “On The Estimation Of Potential Evaporation Under Wet And Dry Conditions” By Z. Tu And Y. Yang, Jozsef Szilagyi

School of Natural Resources: Faculty Publications

No abstract provided.

Estimation Of Catchment Response Time Using A New Automated Event-Based Approach, E. Nagy, Jozsef Szilagyi, P. Torma

School of Natural Resources: Faculty Publications

No abstract provided.

Resilience Of Working Agricultural Landscapes, Shana Sundstrom, Jennifer Hodbod, Craig R. Allen

School of Natural Resources: Faculty Publications

Many alternative agricultural approaches have been developed as a response to the social and ecological costs of modern industrialized agriculture. These include diversified, organic, sustainably intensified, and ecologically intensified farming systems, each of which addresses different aspects of agriculture as a social-ecological system. However, clear theoretical models that account for human-nature coupling and the importance of scale are lacking. Global change, including climate change, land use change, and other human activities influencing social-ecological systems, is exacerbating uncertainty regarding agriculture system dynamics and increasing the need for comprehensive models that include a dynamical integration of socio-ecological-economic influences. Resilience theory and related …

A Statistical Evaluation Of Earth-Observation-Based Composite Drought Indices For A Localized Assessment Of Agricultural Drought In Pakistan, C. Schwartz, W. Lee Ellenburg, V. Mishra, T. Mayer, R. Griffin, F. Qamer, M. Matin, Tsegaye Tadesse

School of Natural Resources: Faculty Publications

No abstract provided.

Public Search Interests Related To Covid-19: Insights From Google Search Trends In Bangladesh, M. Ahamad, M. Ahmed, Daniel R. Uden

School of Natural Resources: Faculty Publications

No abstract provided.

Association Of Zoonotic Protozoan Parasites With Microplastics In Seawater: Implications For Human And Wildlife Health, E. Zhang, M. Kim, L. Rueda, C. Rochman, E. Vanwormer, J. Moore, K. Shapiro

School of Natural Resources: Faculty Publications

No abstract provided.

Remnant Prairies And High-Diversity Restorations Work Together To Support Wild Bees Season-Long, Katie Lamke, David A. Wedin, Judy Wu-Smart

School of Natural Resources: Faculty Publications

The presence of diverse bee communities in an ecosystem is vital for maintaining healthy plant communities, promoting habitat resilience, and supporting agriculture. In the US, wild bee declines have led to increased monitoring efforts, but there remain critical data gaps in much of the Midwest. Here, we sought to examine how variation in richness and abundance of flowering forbs influences the richness and abundance of wild bees across “remnant” tallgrass prairies, “high diversity” prairie restorations, and “low diversity” prairie restorations or degraded grasslands in eastern Nebraska. High-diversity plots attracted no bees in the early season due to a lack of …

Targeted Grazing And Mechanical Thinning Enhance Forest Stand Resilience Under A Narrow Range Of Wildfire Scenarios, V. M. Donovan, C. P. Roberts, D. T. Fogarty, David A. Wedin, D. Twidwell

School of Natural Resources: Faculty Publications

No abstract provided.

When To Prepare: "Water" You Thinking About Drought?, O. G. Campbell, C. Schwartz, Deborah J. Bathke

School of Natural Resources: Faculty Publications

No abstract provided.

Polycentric Governance In Nebraska, U.S., For Ground And Surface Water, Theresa Jedd, Anthony B. Schutz, Mark Burbach

School of Natural Resources: Faculty Publications

This chapter describes the locally driven, but centrally coordinated, water governance model in Nebraska, U.S. It offers a snapshot of water resources and the importance of agriculture, then moves to the relevant political institutions in the state, and federal controls related to water quantity. The focus of the chapter is on the Nebraska Department of Natural Resources’ (NeDNR) and Natural Resources Districts’ (NRDs) management of surface and groundwater, which has some distinct and some overlapping authority. The main area of overlap is in addressing the connection between ground and surface water, particularly in situations when either or both are over …

Towards Water Literacy: An Interdisciplinary Analysis Of Standards For Teaching And Learning About Humans And Water, Silvia‑Jessica Mostacedo‑Marasovic, Brooke Colleen Mott, Holly White, Cory T. Forbes

School of Natural Resources: Faculty Publications

Water is critical to sustain human existence. Water literacy involves understanding the interactions within and between natural and human dimensions of water systems to support informed decision-making, an important outcome for learners of all ages. It is therefore critical to foster water literacy in today’s global citizens, particularly through formal education. The purpose of this study, in tandem with a parallel study focusing on natural dimensions of water systems (Mostacedo-Marasovic et al., in press), is to examine water-related K-12 standards for teaching and learning about human dimensions of water systems to develop a comprehensive and transdisciplinary perspective on water education. …

International Research Experience For Native American Students In Iot-Enabled Environmental Monitoring Technologies, J. Wang, J.M.D. Motschenbacher, A. Finley

School of Natural Resources: Faculty Publications

No abstract provided.

Measuring The Social And Ecological Performance Of Agricultural Innovations On Rangelands: Progress And Plans For An Indicator Framework In The Ltar Network, S. Spiegal, N. P. Webb, E. H. Boughton, R. K. Boughton, A. Bentley Brymer, P. E. Clark, C. D. Holifield Collins, D. L. Hoover Et. Al

School of Natural Resources: Faculty Publications

No abstract provided.

Natural Environment: Protocol To Recover Pollen Grains On Bodies, Karl J. Reinhard, A. Barbosa

School of Natural Resources: Faculty Publications

No abstract provided.

A Biological And Chemical Approach To Restoring Water Quality: A Case Study In An Urban Eutrophic Pond, Levi J. Mckercher, Tiffany L. Messer, Aaron R. Mittelstet, Steve D. Comfort

School of Natural Resources: Faculty Publications

Efforts to improve water quality of eutrophic ponds often involve implementing changes to watershed management practices to reduce external nutrient loads. While this is required for long-term recovery and prevention, eutrophic conditions are often sustained through the recycling of internal nutrients already present within the waterbody. In particular, internal phosphorus bound to organic material and adsorbed to sediment has the potential to delay lake recovery for decades. Thus, pond and watershed management techniques are needed that not only reduce external nutrient loading but also mitigate the effects of internal nutrients already present. Therefore, our objective was to demonstrate a biological …

A Pivotal New Approach To Groundwater Quality Assessment, M. L. Cherry, T. Gilmore, T. Messer, Y. Li, J. Westrop

School of Natural Resources: Faculty Publications

No abstract provided.

Sustainable Irrigation Based On Co-Regulation Of Soil Water Supply And Atmospheric Evaporative Demand, Jingwen Zhang, Kaiyu Guan, Bin Peng, Ming Pan, Wang Zhou, Chongya Jiang, Hyungsuk Kimm, Trenton E. Franz, Robert F. Grant, Yi Yang, Daran R. Rudnick, Derek M. Heeren, Andrew E. Suyker, William L. Bauerle, Grace L. Miner

School of Natural Resources: Faculty Publications

Irrigation is an important adaptation to reduce crop yield loss due to water stress from both soil water deficit (low soil moisture) and atmospheric aridity (high vapor pressure deficit, VPD). Traditionally, irrigation has primarily focused on soil water deficit. Observational evidence demonstrates that stomatal conductance is co-regulated by soil moisture and VPD from water supply and demand aspects. Here we use a validated hydraulically-driven ecosystem model to reproduce the co-regulation pattern. Specifically, we propose a plant-centric irrigation scheme considering water supply-demand dynamics (SDD), and compare it with soil-moisture-based irrigation scheme (management allowable depletion, MAD) for continuous maize cropping systems in …

Magnitude And Uncertainty Of Nitrous Oxide Emissions From North America Based On Bottom-Up And Top-Down Approaches: Informing Future Research And National Inventories, R. Xu, Hanqin Tian, N. Pan, R. L. Thompson, J. G. Canadell, E. A. Davidson, C. Nevison, W. Winiwarter, H. Shi, S. Pan, J. Chang, P. Ciais, Shree Dangal, A. Ito, R. B. Jackson, F. Joos, R. Lauerwald, S. Lienert, T. Maavara, D. B. Millet, P. A. Raymond, P. Regnier, F. N. Tubiello, N. Vuichard, K. C. Wells, C. Wilson, J. Yang, Y. Yao, S. Zaehle, F. Zhou

School of Natural Resources: Faculty Publications

We synthesized N₂O emissions over North America using 17 bottom-up (BU) estimates from 1980– 2016 and five top-down (TD) estimates from 1998 to 2016. The BU-based total emission shows a slight increase owing to U.S. agriculture, while no consistent trend is shown in TD estimates. During 2007–2016, North American N₂O emissions are estimated at 1.7 (1.0–3.0) Tg N yr⁻¹ (BU) and 1.3 (0.9–1.5) Tg N yr⁻¹ (TD). Anthropogenic emissions were twice as large as natural fluxes from soil and water. Direct agricultural and industrial activities accounted for 68% of total anthropogenic emissions, 71% of …

Ten Simple Rules For Creating A Scientific Web Application, Jessica L. Burnett, Renee Dale, Chung-Yi Hou, Gabriela Palomo-Muoz, Kaitlin Stack Whitney, Steve Aulenbach, Robert Sky Bristol, Denis Valle, Tristan P. Wellman

School of Natural Resources: Faculty Publications

The use of scientific web applications (SWApps) across biological and environmental sciences has grown exponentially over the past decades or so. Although quantitative evidence for such increased use in practice is scant, collectively, we have observed that these tools become more commonplace in teaching, outreach, and in science coproduction (e.g., as decision support tools). Despite the increased popularity of SWApps, researchers often receive little or no training in creating such tools. Although rolling out SWApps can be a relatively simple and quick process using modern, popular platforms like R shiny apps or Tableau dashboards, making them useful, usable, and sustainable …

Constraints To Waterfowl Hunting By Hunters And Anglers In The Central United States, Matthew P. Hinrichs, Matthew P. Gruntorad, Julia A. Nawrocki, Mark P. Vrtiska, Mark A. Pegg, Christopher J. Chizinski

School of Natural Resources: Faculty Publications

Waterfowl hunting participation has been on the decline since the mid‐1980s. We used a web‐based survey to better understand waterfowl hunting constraints (i.e., factors that limit or prohibit participation and enjoyment in leisure activities) among hunters and anglers that hunted or did not hunt waterfowl in the central United States. Forty‐eight constraint items were condensed into 10 constraint factors: Rules and Regulations, Waterfowl Identification, Cost, Waterfowl Hunting Skills, Land Access and Permissions, Interference by Other Hunters, Travel, Social, Waterfowl Populations, and Views of Others. We observed significant effects of both state of residence and activity type (i.e., frequent waterfowl hunters, …

A Physiological Signal Derived From Sun-Induced Chlorophyll Fluorescence Quantifies Crop Physiological Response To Environmental Stresses In The U.S. Corn Belt, Hyungsuk Kimm, Kaiyu Guan, Chongya Jiang, Guofang Miao, Genghong Wu, Andrew Suyker, Elizabeth A. Ainsworth, Carl J. Bernacchi, Christopher M. Montes, Joseph A. Berry, Xi Yang, Christian Frankenberg, Min Chen, Philipp Köhler

School of Natural Resources: Faculty Publications

Sun-induced chlorophyll fluorescence (SIF) measurements have shown unique potential for quantifying plant physiological stress. However, recent investigations found canopy structure and radiation largely control SIF, and physiological relevance of SIF remains yet to be fully understood. This study aims to evaluate whether the SIF-derived physiological signal improves quantification of crop responses to environmental stresses, by analyzing data at three different spatial scales within the U.S. Corn Belt, i.e. experiment plot, field, and regional scales, where ground-based portable, stationary and space-borne hyperspectral sensing systems are used, respectively. We found that, when controlling for variations in incoming radiation and canopy structure, crop …

Feasibility Discussion Of Potential Carbon Offsetting Options For Nebraska, Andrew Mwape

School of Natural Resources: Faculty Publications

Conclusion

Highlighting the advantages and disadvantages of carbon offsetting options in the context of the state of Nebraska, this discussion shows that the choice and decisions about which option is better than the other depends on the interests at play and expected outcomes of the participation in carbon markets. However, irrespective of the motive to engage in emission reduction projects for carbon marketing, factors such as cost, and project efficiency can never be overlooked. Given the options discussed in this report, Nebraska has a lot of potential for carbon offsetting or emission reduction projects that would not only reduce and …

Correlated Evolution Of Distinct Signals Associated With Increased Social Selection In Female White-Shouldered Fairywrens, John Anthony Jones, Karan J. Odom, Ian R. Hoppe, Doka Nason, Serena Ketaloya, Jordan Karubian

School of Natural Resources: Faculty Publications

Conspicuous female signals have recently received substantial scientific attention, but it remains unclear if their evolution is the result of selection acting on females independently of males or if mutual selection facilitates female change. Species that express female, but not male, phenotypic variation among populations represents a useful opportunity to address this knowledge gap. White-shouldered fairywrens (Malurus alboscapulatus) are tropical songbirds with a well-resolved phylogeny where female, but not male, coloration varies allopatrically across subspecies. We explored how four distinct signaling modalities, each putatively associated with increased social selection, are expressed in two populations that vary in competitive pressure on …

Salient Experiences In Student Development: Impact Of An Undergraduate Stem Teacher Preparation Program, Amie S. Sommers, Kelly Gomez Johnson, Paula Jakopovic, Julio Rivera, Neal Grandgenett, John A. Conrad, William E. Tapprich, Christine E. Cutucache

School of Natural Resources: Faculty Publications

The need for a comprehensive, high-quality pipeline for the development of undergraduate pre-service teachers, especially those that represent a diverse student body, within STEM disciplines is acute. Here, we studied the NoyceSCIENCE program to determine the most impactful experiences offered to undergraduates through the lens of student development theory. We used qualitative coding to analyze data collected from journals (n = 29) written by students of varying backgrounds, and at varying levels within the program (i.e., the Scholar and Intern level) over a 3-year program running period. We observed that faculty mentorship, the ability of undergraduates to mentor others, volunteer …

Monitoring Agroecosystem Productivity And Phenology At A National Scale: A Metric Assessment Framework, Dawn M. Browning, Eric S. Russell, Guillermo E. Ponce-Campos, Nicole Kaplan, Andrew D. Richardson, Bijan Seyednasrollah, Sheri Spiegal, Nicanor Saliendra, Joseph G. Alfieri, John Baker, Carl Bernacchi, Brandon T. Bestelmeyer, David Bosch, Elizabeth H. Boughton, Raoul K. Boughton, Pat Clark, Gerald Flerchinger, Nuria Gomez-Casanovas, Sarah Goslee, Nick M. Haddad, David Hoover, Abdullah Jaradat, Marguerite Mauritz, Gregory W. Mccarty, Gretchen R. Miller, John Sadler, Amartya Saha, Russell L. Scott, Andrew Suyker, Craig Tweedie, Jeffrey D. Wood, Xukai Zhang, Shawn D. Taylor

School of Natural Resources: Faculty Publications

Effective measurement of seasonal variations in the timing and amount of production is critical to managing spatially heterogeneous agroecosystems in a changing climate. Although numerous technologies for such measurements are available, their relationships to one another at a continental extent are unknown. Using data collected from across the Long-Term Agroecosystem Research (LTAR) network and other networks, we investigated correlations among key metrics representing primary production, phenology, and carbon fluxes in croplands, grazing lands, and crop-grazing integrated systems across the continental U.S. Metrics we examined included gross primary productivity (GPP) estimated from eddy covariance (EC) towers and modelled from the Landsat …

Relationships Among Toilet Sharing, Water Source Locations, And Handwashing Places Without Observed Soap: A Cross-Sectional Study Of The Richest Households In Bangladesh, Mazbahul G. Ahamad, Mark Burbach, Fahian Tanin

School of Natural Resources: Faculty Publications

Background: A high percentage of the richest households in Bangladesh lack soap at their handwashing places, a problem that is typically considered to be one of the poor. Objective: We investigated toilet sharing practices, locations of water sources, and relevant sociodemographic factors associated with the observed handwashing places that lack soap in the richest (ninth wealth decile) households in Bangladesh. Methods: We used data from the 2017-18 Bangladesh Demographic and Health (BDHS) Survey. Logistic regression technique was used to investigate how toilet sharing practices, water source locations, and different sociodemographic factors were associated with observed handwashing places without soap. Results: …

Socio-Economic And Governance Conditions Corresponding To Change In Animal Agriculture: South Dakota Case Study, Jacqueline S. Welles, Noelle Cielito T. Soriano, Freda Elikem Dorbu, G M. Pereira, Laura M. Rubeck, Erica L. Timmermans, Benjamin Ndayambaje, Alison V. Deviney, John J. Classen, Jacek A. Koziel, Erin L. Cortus

School of Natural Resources: Faculty Publications

Understanding sustainable livestock production requires consideration of both qualitative and quantitative factors in a temporal and/or spatial frame. This study adapted Qualitative Comparative Analysis (QCA) to relate conditions of social, economic, and governance factors to changes in livestock inventory across several counties and over time. This paper presents an approach that (1) identified factors with the potential to relate to a change in livestock inventory and (2) analyzed commonalities within these factors related to changes spatially and temporally. This paper illustrates the approach and results when applied to five counties in eastern South Dakota. The specific response variables were periods …