Digital Commons Network^™

The Global Food-Energy-Water Nexus, Paolo D’Odorico, Kyle Frankel Davis, Lorenzo Rosa, Joel A. Carr, Davide Chiarelli, Jampel Dell’Angelo, Jessica Gephart, Graham K. Macdonald, David A. Seekell, Samir Suweis, Maria Cristina Rulli

United States Geological Survey: Staff Publications

Water availability is a major factor constraining humanity’s ability to meet the future food and energy needs of a growing and increasingly affluent human population. Water plays an important role in the production of energy, including renewable energy sources and the extraction of unconventional fossil fuels that are expected to become important players in future energy security. The emergent competition for water between the food and energy systems is increasingly recognized in the concept of the “food-energy-water nexus.” The nexus between food and water is made even more complex by the globalization of agriculture and rapid growth in food trade, …

Changes In Abundance Of Silvetia Compressa At San Clemente Island Before And During The 2015–2016 El Niño, Suzanne Graham, Brian Hong, Samantha Mutschler, Brendan Saunders, Jessica Bredvik

United States Navy: Publications

Silvetia compressa is a common rocky intertidal fucoid that plays an important role in the community and has experienced widespread declines throughout California. The causes of these declines are unknown, but sea surface temperature (SST) is considered one of the dominant factors affecting intertidal algae. The 2015–2016 El Niño introduced anomalously high SSTs to southern California, which may have impacted rocky intertidal species. This study investigates temporal changes in abundance of S. compressa with respect to SST at 4 sites on San Clemente Island (SCI), California, from 2012 to 2016. Point-intercept data were used to quantify percent cover during biannual …

Changes In Abundance Of Silvetia Compressa At San Clemente Island Before And During The 2015–2016 El Niño, Suzanne Graham, Brian Hong, Samantha Mutschler, Brendan Saunders, Jessica Bredvik

United States Navy: Publications

Silvetia compressa is a common rocky intertidal fucoid that plays an important role in the community and has experienced widespread declines throughout California. The causes of these declines are unknown, but sea surface temperature (SST) is considered one of the dominant factors affecting intertidal algae. The 2015–2016 El Niño introduced anomalously high SSTs to southern California, which may have impacted rocky intertidal species. This study investigates temporal changes in abundance of S. compressa with respect to SST at 4 sites on San Clemente Island (SCI), California, from 2012 to 2016. Point-intercept data were used to quantify percent cover during …

Spatial And Temporal Analysis Of A 17–Year Lightning Climatology Over Bangladesh With Lis Data, Rezaul Mahmood

School of Natural Resources: Faculty Publications

No abstract provided.

Lake Regionalization And Diatom Metacommunity Structuring In Tropical South America, Xavier Benito, Sherilyn C. Fritz, Miriam Steinitz-Kannan, Maria I. Velez, Michael M. Mcglue

Department of Earth and Atmospheric Sciences: Faculty Publications

Lakes and their topological distribution across Earth’s surface impose ecological and evolutionary constraints on aquatic metacommunities. In this study, we group similar lake ecosystems as metacommunity units influencing diatom community structure. We assembled a database of 195 lakes from the tropical Andes and adjacent lowlands (8°N–30°S and 58–79°W) with associated environmental predictors to examine diatom metacommunity patterns at two different levels: taxon and functional (deconstructed species matrix by ecological guilds). We also derived spatial variables that inherently assessed the relative role of dispersal. Using complementary multivariate statistical techniques (principal component analysis, cluster analysis, nonmetric multidimensional scaling, Procrustes, variance partitioning), we …

Women’S Work? The Relationship Between Farmwork And Gender Self-Perception, Jolene Smyth, Alexis Swendener, Emily Kazyak

Department of Sociology: Faculty Publications

Women have long been involved in agricultural production, yet farming and ranching have been associated with masculinity and men. In recent years women have become more involved and more likely to take active and equal roles on farms and ranches and thus increasingly are doing tasks that have been associated with masculinity. Prior work indicates that women are perceived by others as more masculine when they do these tasks, but less work has focused on the association between women’s involvement in farming and women’s own perceptions of their gender (i.e., how masculine or feminine they feel). Using 2006 survey data …

Adolescent Sexual Risk Taking: The Distribution Of Youth Behaviors And Perceived Peer Attitudes Across Neighborhood Contexts, Tara D. Warner

Department of Sociology: Faculty Publications

Purpose: Sexual activity is a normative part of adolescent development, yet early sexual debut and sex with multiple partners undermine health and well-being. Both structural (e.g., poverty) and social (e.g., norms) characteristics of neighborhoods shape sexual risk taking, yet scholarship remains focused on urban areas. Thus, this study explores sexually permissive attitudes and sexual risk taking across a wider expanse of neighborhood types. Methods: Among 8,337 nonsexually active respondents in Wave I (1994–1995 [ages 11–18]) of the National Longitudinal Study of Adolescent to Adult Health (Add Health), a hierarchical linear model and a hierarchical generalized linear model were used to …

Managing Grazing Lands To Improve Soils And Promote Climate Change Adaptation And Mitigation: A Global Synthesis, Marcia Delonge, Andrea D. Basche

Department of Agronomy and Horticulture: Faculty Publications

The potential to improve soils to help farmers and ranchers adapt to and mitigate climate change has generated significant enthusiasm. Within this discussion, grasslands have surfaced as being particularly important, due to their geographic range, their capacity to store substantial quantities of carbon relative to cultivated croplands and their potential role in mitigating droughts and floods. However, leveraging grasslands for climate change mitigation and adaptation will require a better understanding of how farmers and ranchers who rely on them for their livelihoods can improve management and related outcomes. To investigate opportunities for such improvements, we conducted a meta-analysis of field …

Review Of John James Audubon: The Nature Of The American Woodsman, By Gregory Nobles, Matthew Guzman

Department of English: Dissertations, Theses, and Student Research

When we think about American ornithology, John James Audubon is often the first name that comes to mind. As evidence to Audubon’s lasting ability to enrapture readers, it bears repeating that an original Double Elephant Folio of Birds of America sold for an astounding $11.5 million in 2010 (2). Yet, for a man who produced such stunning and memorable visual and literary work on the avifauna of North America, some of the important details of his life and origins have remained highly contested. Even though Gregory Nobles’s new biography is not explicitly tied to the study of the Great Plains, …

Introduction To Parenting From Afar And The Reconfiguration Of Family Across Distance, Maria Rosario De Guzman, Jill Brown, Carolyn Edwards

Department of Child, Youth, and Family Studies: Faculty Publications

Anthropologists have provided a rich research literature on family life, documenting the quite extreme variations in emotional and interactional closeness of the husband-wife relationship with respect to sleeping, eating, work, and leisure. For example, John and Beatrice Whiting (l975a) studied the dimension of what they characterized as husband-wife "aloofness versus intimacy:' They and other anthropologists have correlated this dimension of husband-wife closeness with male cross-sex identity, male involvement in warfare and group defense (extensive vs. unpredictable), marriage type (monogamous vs. polygynous), household structure (nuclear vs. extended, joint, or polygynous), preferred leisure and work partners (same-gender vs. mixed gender, paternal interaction …

Evaluating Soil Moisture–Precipitation Interactions Using Remote Sensing: A Sensitivity Analysis, Trent W. Ford, Steven M. Quiring, Balbhadra Thakur, Rohit Jogineedi, Adam Houston, Shanshui Yuan, Ajay Kalra, Noah Lock

Department of Earth and Atmospheric Sciences: Faculty Publications

The complex interactions between soil moisture and precipitation are difficult to observe, and consequently there is a lack of consensus as to the sign, strength, and location of these interactions. Inconsistency between soil moisture–precipitation interaction studies can be attributed to a multitude of factors, including the difficulty of demonstrating causal relationships, dataset differences, and precipitation autocorrelation. The purpose of this study is to explore these potential confounding factors and determine which are most important for consideration when assessing statistical coupling between soil moisture and precipitation. Soil moisture is assessed via three remote sensing datasets: theAdvancedMicrowave Scanning Radiometer for EarthObserving System, …

Making Babies With Cows, Scout Calvert

University of Nebraska-Lincoln Libraries: Faculty Publications

The conceit of section one of this essay is partial role reversal. How would a doctor who was a cow explain to yearling interns how to breed humans? This is what a cow might sound like if she thought about humans the ways that human purebred livestock breeders think about cows. Section two switches back to a human perspective and treats the extensive interventions into cattle reproduction as the mundane options that they have become for many farmers. This essay highlights the traffic of reproductive technologies across the porous human-bovine species boundary.

Crop Height Estimation With Unmanned Aerial Vehicles, Carrick Detweiler, David Anthony, Sebastian Elbaum

School of Computing: Faculty Publications

An unmanned aerial vehicle (UAV) can be configured for crop height estimation. In some examples, the UAV includes an aerial propulsion system, a laser scanner configured to face downwards while the UAV is in flight, and a control system. The laser scanner is configured to scan through a two-dimensional scan angle and is characterized by a maxi mum range. The control system causes the UAV to fly over an agricultural field and maintain, using the aerial propulsion system and the laser scanner, a distance between the UAV and a top of crops in the agricultural field to within a programmed …

Internet Of Underground Things In Precision Agriculture: Architecture And Technology Aspects, Mehmet C. Vuran, Abdul Salam, Rigoberto Wong, Suat Irmak

School of Computing: Faculty Publications

The projected increases in World population and need for food have recently motivated adoption of information technology solutions in crop fields within precision agriculture approaches. Internet Of Underground Things (IOUT), which consists of sensors and communication devices, partly or completely buried underground for real-time soil sensing and monitoring, emerge from this need. This new paradigm facilitates seamless integration of underground sensors, machinery, and irrigation systems with the complex social network of growers, agronomists, crop consultants, and advisors. In this paper, state-of-the-art communication architectures are reviewed, and underlying sensing technology and communication mechanisms for IOUT are presented. Moreover, recent advances in …

Recent Ecological Change In Ancient Lakes, Stephanie E. Hampton, Suzanne Mcgowan, Ted Ozersky, Salvatore G. P. Virdis, Tuong Thuy Vu, Trisha L. Spanbauer, Benjamin M. Kraemer, George Swann, Anson W. Mackay, Stephen M. Powers, Michael F. Meyer, Stephanie G. Labou, Catherine M. O'Reilly, Morgan Dicarlo, Aaron W. E. Galloway, Sherilyn C. Fritz

Department of Earth and Atmospheric Sciences: Faculty Publications

Ancient lakes are among the best archivists of past environmental change, having experienced more than one full glacial cycle, a wide range of climatic conditions, tectonic events, and long association with human settlements. These lakes not only record long histories of environmental variation and human activity in their sediments, but also harbor very high levels of biodiversity and endemism. Yet, ancient lakes are faced with a familiar suite of anthropogenic threats, which may degrade the unusual properties that make them especially valuable to science and society. In all ancient lakes for which data exist, significant warming of surface waters has …

Role Of Whole Grains Versus Fruits And Vegetables In Reducing Subclinical Inflammation And Promoting Gastrointestinal Health In Individuals Affected By Overweight And Obesity: A Randomized Controlled Trial, Julianne C. Kopf, Mallory J. Suhr, Jennifer L. Clarke, Seong-Il Eyun, Jean-Jack M. Riethoven, Amanda E. Ramer-Tait, Devin J. Rose

Department of Food Science and Technology: Faculty Publications

Background: Whole grains (WG) and fruits and vegetables (FV) have been shown to reduce the risk of metabolic disease, possibly via modulation of the gut microbiota. The purpose of this study was to determine the impact of increasing intake of either WG or FV on inflammatory markers and gut microbiota composition.

Methods: A randomized parallel arm feeding trial was completed on forty-nine subjects with overweight or obesity and low intakes of FV and WG. Individuals were randomized into three groups (3 servings/d provided): WG, FV, and a control (refined grains). Stool and blood samples were collected at the beginning of …

Investigating Colonization Of The Healthy Adult Gastrointestinal Tract By Fungi, Thomas A. Auchtung, Tatiana Y. Fofanova, Christopher J. Stewart, Andrea K. Nash, Matthew C. Wong, Jonathan R. Gesell, Jennifer M. Auchtung, Nadim J. Ajami, Joseph F. Petrosino

Department of Food Science and Technology: Faculty Publications

A wide diversity of fungi have been detected in the human gastrointestinal (GI) tract with the potential to provide or influence important functions. However, many of the fungi most commonly detected in stool samples are also present in food or the oral cavity. Therefore, to recognize which gut fungi are likely to have a sustained influence on human health, there is a need to separate transient members of the GI tract from true colonizers. To identify colonizing fungi, the eukaryotic rRNA operon’s second internal transcribed spacer (ITS2) was sequenced from the stool, saliva, and food of healthy adults following consumption …

Metacognitive Theories Revisited, David Moshman

Department of Educational Psychology: Faculty Publications

“Metacognitive theories,” an article Gregg Schraw and I published in Educational Psychology Review in 1995, has been cited in over a thousand scholarly publications. In this follow-up, dedicated to Gregg and written after his recent death, I provide a brief overview of our 1995 article and then reflect on it in four ways. First, I consider the development of the concept of metacognition prior to 1995, including its emergence and use in previous writings by each co-author. Then, I turn to the collaboration itself, including the interplay of complementary conceptions and the construction of new ideas. Third, I consider the …

Clean Low-Biomass Procedures And Their Application To Ancient Ice Core Microorganisms, Zhi-Ping Zhong, Natalie E. Solonenko, Maria C. Gazitua, Donald V. Kenny, Ellen Mosley-Thompson, Virginia I. Rich, James L. Van Etten, Lonnie G. Thompson, Matthew B. Sullivan

Department of Plant Pathology: Faculty Publications

Microorganisms in glacier ice provide tens to hundreds of thousands of years archive for a changing climate and microbial responses to it. Analyzing ancient ice is impeded by technical issues, including limited ice, low biomass, and contamination. While many approaches have been evaluated and advanced to remove contaminants on ice core surfaces, few studies leverage modern sequencing to establish in silico decontamination protocols for glacier ice. Here we sought to apply such “clean” sampling techniques with in silico decontamination approaches used elsewhere to investigate microorganisms archived in ice at ~41 (D41, ~20,000 years) and ~49 m (D49, ~30,000 years) depth …

Whole Genome Sequencing Of Moraxella Bovoculi Reveals High Genetic Diversity And Evidence For Interspecies Recombination At Multiple Loci, Aaron M. Dickey, Gennie Schuller, John D. Loy, Michael L. Clawson

School of Veterinary and Biomedical Sciences: Faculty Publications

Moraxella bovoculi is frequently cultured from the ocular secretions and conjunctiva of cattle with Infectious Bovine Keratoconjunctivitis (IBK). Previous work has shown that single nucleotide polymorphism (SNP) diversity in this species is quite high with 81,284 SNPs identified in eight genomes representing two distinct genotypes isolated from IBK affected eyes (genotype 1) and the nasopharynx of cattle without clinical IBK signs (genotype 2), respectively. The goals of this study were to identify SNPs from a collection of geographically diverse and epidemiologically unlinked M. bovoculi strains from the eyes of IBK positive cattle (n = 183) and another from the eyes …

Absorptive Capacity In Rural Schools: Bending Not Breaking During Disruptive Innovation Implementation, Sarah J. Zuckerman, Kristen Campbell Wilcox, Kathryn S. Schiller, Francesca T. Durand

Department of Educational Administration: Faculty Publications

Rural schools have repeatedly been subjected to standardizing state and federal education policies that seek to minimize variance in instructional systems and increase the number of college- and career-ready graduates. The Race to the Top policy agenda combined standards-based and accountability-based reforms to meet these objectives and once again subjected rural schools to innovations from outside experts. This qualitative study uses four instrumental cases of rural schools to understand: 1) leadership strategies, and 2) mechanisms and processes of alignment, which allowed schools to maintain high levels of student performance in the face of disruptive policy innovations. The fi ndings of …

Biomass Production Of Herbaceous Energy Crops In The United States: Field Trial Results And Yield Potential Maps From The Multiyear Regional Feedstock Partnership, Dokyoung Lee, Ezra Aberle, Eric K. Anderson, William Anderson, Brian S. Baldwin, David D. Baltensperger, Michael Barrett, Jurg Blumenthal, Stacy Bonos, Joe Bouton, David I. Bransby, Charlie Brummer, Pane S. Burks, Chengci Chen, Christopher Daly, Jose Egenolf, Rodney L. Farris, John H. Fike, Roch E. Gaussoin, John R. Gill, Kenneth Gravois, Michael D. Halbleib, Anna Hale, Wayne Hanna, Keith Harmoney, Emily A. Heaton, Ron W. Heiniger, Lindsey Hoffman, Chang O. Hong, Gopal Kakani, Robert Kallenbach, Bisoondat Macoon, James C. Medley, Ali Missaoui, Robert B. Mitchell, Ken J. Moore, Jesse I. Morrison, Gary N. Odvody, Jonathan D. Richwine, Richard Ogoshi, Jimmy Ray Parrish, Lauren Quinn, Ed Richard, William L. Rooney, J. Brett Rushing, Ronnie Schnell, Matt Sousek, Scott A. Staggenborg, Thomas Tew, Goro Uehara, Donald R. Viands, Thomas Voigt, David Williams, Linda Williams, Lloyd Ted Wilson, Andrew Wycislo, Yubin Yang, Vance Owens

Department of Agronomy and Horticulture: Faculty Publications

Current knowledge of yield potential and best agronomic management practices for perennial bioenergy grasses is primarily derived from small-scale and short-term studies, yet these studies inform policy at the national scale. In an effort to learn more about how bioenergy grasses perform across multiple locations and years, the U.S. Department of Energy (US DOE)/Sun Grant Initiative Regional Feedstock Partnership was initiated in 2008. The objectives of the Feedstock Partnership were to (1) provide a wide range of information for feedstock selection (species choice) and management practice options for a variety of regions and (2) develop national maps of potential feedstock …

Mapping Rootable Depth And Root Zone Plant-Available Water Holding Capacity Of The Soil Of Sub-Saharan Africa, John G. B. Leenaars, Lieven Claessens, Gerard B. M. Heuvelink, Tom Hengl, Maria Ruiperez Gonzalez, Lenny G. J. Van Bussel, Nicolas Guilpart, Haishun Yang, Kenneth G. Cassman

Department of Agronomy and Horticulture: Faculty Publications

In rainfed crop production, root zone plant-available water holding capacity (RZ-PAWHC) of the soil has a large influence on crop growth and the yield response to management inputs such as improved seeds and fertilisers. However, data are lacking for this parameter in sub-Saharan Africa (SSA). This study produced the first spatially explicit, coherent and complete maps of the rootable depth and RZ-PAWHC of soil in SSA. We compiled georeferenced data from 28,000 soil profiles from SSA, which were used as input for digital soil mapping (DSM) techniques to produce soil property maps of SSA. Based on these soil properties, we …

Mapping Rootable Depth And Root Zone Plant-Available Water Holding Capacity Of The Soil Of Sub-Saharan Africa, Johan G. B. Leenaars, Lieven Claessens, Gerard B.M. Heuvelink, Tom Hengl, Maria Ruiperez Gonzalez, Lenny G.J. Van Bussel, Nicolas Guilpart, Haishun Yang, Kenneth G. Cassman

Department of Agronomy and Horticulture: Faculty Publications

In rainfed crop production, root zone plant-available water holding capacity (RZ-PAWHC) of the soil has a large influence on crop growth and the yield response to management inputs such as improved seeds and fertilisers. However, data are lacking for this parameter in sub-Saharan Africa (SSA). This study produced the first spatially explicit, coherent and complete maps of the rootable depth and RZ-PAWHC of soil in SSA. We compiled georeferenced data from 28,000 soil profiles from SSA, which were used as input for digital soil mapping (DSM) techniques to produce soil property maps of SSA. Based on these soil properties, we …

Unlocking The Novel Genetic Diversity And Population Structure Of Synthetic Hexaploid Wheat, Madhav Bhatta, Alexey Morgounov, Vikas Belamkar, Jesse Poland, P. Stephen Baenziger

Department of Agronomy and Horticulture: Faculty Publications

Background: Synthetic hexaploid wheat (SHW) is a reconstitution of hexaploid wheat from its progenitors (Triticum turgidum ssp. durum L.; AABB x Aegilops tauschii Coss.; DD) and has novel sources of genetic diversity for broadening the genetic base of elite bread wheat (BW) germplasm (T. aestivum L). Understanding the diversity and population structure of SHWs will facilitate their use in wheat breeding programs. Our objectives were to understand the genetic diversity and population structure of SHWs and compare the genetic diversity of SHWs with elite BW cultivars and demonstrate the potential of SHWs to broaden the genetic base …

Using Watershed Boundaries To Map Adverse Health Outcomes: Examples From Nebraska, Usa, Brittany Corley, Shannon L. Bartelt-Hunt, Eleanor Rogan, Donald Coulter, John Sparks, Lorena Baccaglini, Madeline Howell, Sidra Liaquat, Rex Commack, Alan S. Kolok

Department of Civil and Environmental Engineering: Faculty Publications

In 2009, a paper was published suggesting that watersheds provide a geospatial platform for establishing linkages between aquatic contaminants, the health of the environment, and human health. This article is a follow-up to that original article. From an environmental perspective, watersheds segregate landscapes into geospatial units that may be relevant to human health outcomes. From an epidemiologic perspective, the watershed concept places anthropogenic health data into a geospatial framework that has environmental relevance. Research discussed in this article includes information gathered from the literature, as well as recent data collected and analyzed by this research group. It is our contention …

Some Remarks Further To "Outer Space And International Geography: Article Ii And The Shape Of Global Order" By P. J. Blount, Frans Von Der Dunk

Space, Cyber, and Telecommunications Law Program: Faculty Publications

Introduction ... The Key Role of Article II of the Outer Space Treaty ... Article II of the Outer Space Treaty and the Commercialization of Outer Space ... Space Mining: The Need for an Update of the Legal Framework ... Updating the Existing Legal Framework: Some Further Thoughts ... Concluding Remarks

Change In Dominance Determines Herbivore Effects On Plant Biodiversity, Sally E. Koerner, Johannes Knops, Dustin J. Strong, 80 More Co-Authors

School of Biological Sciences: Faculty Publications

Herbivores alter plant biodiversity (species richness) in many of the world's ecosystems, but the magnitude and the direction of herbivore effects on biodiversity vary widely within and among ecosystems. One current theory predicts that herbivores enhance plant biodiversity at high productivity but have the opposite effect at low productivity. Yet, empirical support for the importance of site productivity as a mediator of these herbivore impacts is equivocal. Here, we synthesize data from 252 large-herbivore exclusion studies, spanning a 20-fold range in site productivity, to test an alternative hypothesis—that herbivore-induced changes in the competitive environment determine the response of plant biodiversity …

Paleoparasitology And Pathoecology In Russia: Investigations And Perspectives, Sergey Slepchenko, Karl Reinhard

Karl Reinhard Publications

Russia, both as the USSR and the Russian federation, provided a source of parasitological theory for decades. A key figure in Russian parasitology was Yevgeny Pavlovsky. He developed the nidus concept, the conceptual basis for the field of pathoecology. He also coined the term “paleoparasitology.” Pathoecology is a foundation concept in archaeological parasitology. Paleoparasitology, as defined by Pavlovsky, is an avenue for understanding of host parasite evolution over very long time periods. These contributions are not fully recognized internationally. Similarly, the long history of Russian paleontological and archaeological investigations are not fully known. Most recently, discoveries from archaeological sites show …

Science At Engineer Cantonment, Hugh H. Genoways, Brett C. Ratcliffe, Carl R. Falk, Thomas E. Labedz, Paul R. Picha, John R. Bozell

University of Nebraska State Museum: Mammalogy Papers

Conclusions

It is our contention that Thomas Say, Titian Peale, Edwin James, and their colleagues of the Stephen Long Expedition of 1819–1820 were heavily engaged in scientific research, which took the form of the first biodiversity inventory undertaken in the United States. This accomplishment has been overlooked both by biologists and historians, but it should rank among the most significant accomplishments of the expedition. The results of this inventory continue to inform us today about environmental, faunal, and floral changes along the Missouri River in an area that is known to be an ecotone between the deciduous forests of the …