Digital Commons Network^™

Low Offspring Survival In Mountain Pine Beetle Infesting The Resistant Great Basin Bristlecone Pine Supports The Preference-Performance Hypothesis, Erika L. Eidson, Karen E. Mock, Barbara J. Bentz

Wildland Resources Faculty Publications

The preference-performance hypothesis states that ovipositing phytophagous insects will select host plants that are well-suited for their offspring and avoid host plants that do not support offspring performance (survival, development and fitness). The mountain pine beetle (Dendroctonus ponderosae), a native insect herbivore in western North America, can successfully attack and reproduce in most species of Pinus throughout its native range. However, mountain pine beetles avoid attacking Great Basin bristlecone pine (Pinus longaeva), despite recent climate-driven increases in mountain pine beetle populations at the high elevations where Great Basin bristlecone pine grows. Low preference for a potential …

Archaeological Analysis Of Bison Remains From Wilde Cave, Idaho, Michelle A. Platt

Undergraduate Honors Capstone Projects

Wilde cave is a lava tube located in Southeast Idaho on BLM lands. Recent investigations recovered a skeletal collection represented at least nine bison, as well as several other taxa. After many hours in the archaeology lab at Utah State University, identification of the collection shows the most prominent carcass parts represent fore and hind limbs, while vertebrae and ribs were least common. Also present was limited evidence of butchery-burning and cut marks-and carnivore modification on the skeletal collection. Given these observations, density mediated attrition and utility indices were used to better understanding the patterns in the archaeological bison bone. …

Effect Of Wood Chips As A Component Of Soilless Media On Growth And Nutrition Of Food And Ornamental Crops, Kristen Bullough

Undergraduate Honors Capstone Projects

Peat is the central component of the soil-less media mix in all greenhouse crop production but it is expensive because it is harvested in Canada and shipped to greenhouses across North America. Wood chips provide a local, low-cost alternative to peat, but observations by growers indicate potential growth reductions from the addition of wood to peat-based media. Here I report the effects of the addition of wood chips to peat-based media. The study included four treatments: two controls (peat/vermiculite: 50/50 and 75/25) and two treatments with wood chips ' (peat/wood chips: 50/50 and 75/25) with three species (sunflowers, soybeans, and …

Maternal Vitamin D Deficiency And Early Childhood Health Outcomes Including Autism Development, Kelsey L. Girardelli

Undergraduate Honors Capstone Projects

Many studies have shown that vitamin D deficiency during pregnancy is associated with a variety of adverse maternal and pediatric outcomes. Disease outcomes that have been observed in pregnant women who are vitamin D deficient include increased risk of C-section, preeclampsia, bacterial vaginosis, and gestational diabetes. In children born to deficient mothers, increased rates of childhood asthma, type 1 diabetes, low birthweight, and autism spectrum disorder (ASD) have been observed. Although there is much evidence to support these correlations, much is yet to be understood regarding the etiology of these outcomes. This paper specifically examines the relationships between risk factors …

Managing Dietary Protein In Cattle As A Means Of Reducing Ammonia Emissions To Improve Air Quality, Ashley Houston

Undergraduate Honors Capstone Projects

Particulate matter pollution has become a subject of great concern across the globe. Emissions data has revealed that the agricultural sector is making large contributions to particulate matter through ammonia emissions. Beef and dairy cattle are responsible for producing nearly 50% of annual ammonia emissions in the United States. These animals are often fed amounts of dietary protein that exceed recommendations, resulting in increased excretion of urea and ammonia. These compounds combine with nitrogen oxides in the atmosphere to form PM_2.5: particulate matter measuring less than 2.5 microns in diameter. Research has shown that through proper dietary management …

Development Of A 4th-8th Grade Curriculum For Flying And Programming Mini Drones, Jordan Lynn Bartholomew, Russell Scott Mayo

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

This project was a joint effort by Jordan Bartholomew and Russell Mayo. The project consisted of three parts. Part one was the development of the lesson content led by Jordan Bartholomew. Part two was the production of a multimedia package that included lesson videos, animations and logos for the ROAV copter mini curriculum, led by Russell Mayo. Part three included a journal article to introduce the curriculum co-written by both Jordan and Russ. The curriculum was developed for hands-on experiential learning and includes a computational thinking component. The lesson videos were intended for self-instruction or in a classroom setting. The …

Bovine Mastitis Resistance: Novel Quantitative Trait Loci And The Role Of Bovine Mammary Epithelial Cells, Jacqueline P. Kurz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bovine mastitis, or inflammation of the mammary gland, has substantial economic and animal welfare implications. A genetic basis for mastitis resistance traits is recognized and can be used to guide selective breeding programs. The discovery of regions of the genome associated with mastitis resistance, and knowledge of the underlying molecular mechanisms responsible, can facilitate development of efficient mastitis control and therapeutic strategies. The objectives of this dissertation research were to identify sites of genetic variation associated with mastitis resistance, and to define the contributions of the milk-secreting epithelial cells to mammary gland immune responses and mastitis resistance. Twenty seven regions …

Evaluating Water Filtration And Disinfection For Household, Using Slow Sand Filters Plus Solar Disinfection, Mariana Demitry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In this research, a household water treatment system was built and evaluated as a trial for improving the drinking water quality of the Nile River for the low-income communities. The system consisted of household-scale slow sand filters, and transparent polyethylene terephthalate-bottles for solar disinfection. The evaluation of the system depended on the removal/inactivation of some surrogates for the reference pathogens, and turbidity. The reference pathogens are pathogens specified by the World Health Organization to evaluate the efficiency of the household water treatment options. They were chosen to represent the classes of pathogens in water (bacteria, viruses, protozoa). The surrogates used …

Evaluation Of Oocyte Developmental Competence And Potential Strategies To Improve Oocyte Quality, Min Yang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Assisted reproductive technologies (ARTs) have now been extensively used to promote reproductive efficiency as a fertility treatment not only in human medicine but also animal reproduction. ARTs serve as an important tool to advance the fundamental knowledge of reproductive processes. The quality of female’s eggs defines its ability to undergo maturation, fertilization, and development. This quality is determined by various factors and is crucial for the success of ARTs. Any alternations happening during the egg growth and maturation process can result in the decreased quality, which could have long-lasting effects on development. Improving the developmental efficiency of the egg is …

Effect Of Silicon On Wheat Growth And Development In Drought And Salinity Stress, Spencer A. Tibbitts

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Silicon is a major component of most soils, and is found in significant concentration in plant tissue. Plants vary widely in the amount of silicon they take up, with some plants excluding it, and others using transporters to move the silicon from the soil into their roots. Early plant physiology studies were unable to determine conclusively whether silicon was essential to plant growth, but for some plants, most notably rice, it has proved to be important enough to justify fertilizing silicon deficient fields.

Researchers at the USU Crop Physiology Lab tested the effect of silicon on wheat growth and seed …

Professional Development Needs Of Utah State University Extension Professionals, Callahan K. Ward

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many Utah State University (USU) Extension personnel are nearing retirement age. The purpose of this study was to identify professional development needs of Extension professionals and assess USU Extension by evaluating competencies essential to be a successful Extension professional. USU Extension can conduct more beneficial professional development training by using identified high priority competencies and improve the on boarding process for new Extension professionals. With improvements as suggested, the effectiveness of professional development could be enhanced and produce Extension professionals who work more efficiently and are committed to the success of USU Extension.

Effect Of High Intensity Ultrasound On The Crystallization Behavior Of Interesterified Fats, Jeta Vijay Kadamne

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The process of partial hydrogenation produces trans fats and the fats that undergo this process are called partially hydrogenated fats (PHF). Clinical studies have shown a strong association between PHF and coronary heart diseases. In 2015 The U.S. Food and Drug Administration removed the Generally recognized as safe or "GRAS" status of PHF. These fats were used in confectionary, margarines, shortenings, doughnuts, cookies, cakes, etc. The PHF serve a function in food by providing a higher shelf life and a desired harder structure due to their higher melting point. Hence, the food industry is currently looking for PHF alternatives which …

Promoting Client Nutrition In Urban Utah Food Pantries, Casey Coombs

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Food pantry clients are at an increased risk of poor diet quality which can lead to a variety of chronic diseases. Identifying nutrition interventions that help improve the dietary intake of this vulnerable population is important to help improve health outcomes. Utah’s Supplemental Nutrition Assistance Program-Education (SNAP-Ed), also known as Food $ense, partners with many pantries throughout the state to improve healthy food access. This research was conducted to evaluate the effectiveness of a pantry intervention, Thumbs Up for Healthy Choices, to evaluate its impact on food pantry clients’ selection and use of identified healthy foods. In addition to program …

A Model For Bioaugmented Anaerobic Granule, Amitesh Mahajan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In this study, we have created a simulation model which is concerned about digesting cellulose, as a major component of microalgae in a bioreactor. This model is designed to generate a computational model that simulates the process of granulation in anaerobic sludge and aims to investigate scenarios of possible granular bioaugmentation. Once a mature granule is formed, protein is used as an alternative substrate that will be supplied to a mature granule. Protein, being a main component of cyanobacteria, will promote growth and incorporation of a cell type that can degrade protein (selective pressure). The model developed in a cDynoMiCs …

Using Social Cues To Influence Fruit And Vegetable Intake In College Students, Elizabeth A. Nix

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

People often base their behaviors on social norms—what they think others do or approve of. This is likely true of fruit and vegetable (FV) intake as well. College students typically don’t get enough FV. We attempted to encourage FV eating by providing students with messages or demonstrations that eating FV is normal. First, we tried to encourage FV intake by providing students with messages regarding the average skin carotenoid concentration and where they fit within their peers (Chapter II). Carotenoids are compounds found in FV that cannot be made by the body, making them an estimate of FV intake. We …

Investigations Of Polyhydroxyalkanoate Secretion And Production Using Sustainable Carbon Sources, Chad L. Nielsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Polyhydroxyalkanoates (PHAs) are a type of biologically-produced plastic known for their biocompatibility and biodegradability. They have the potential to replace petroleum-based plastics as an environmentally-friendly alternative. This is beneficial because the release of plastics into environments such as the ocean and the buildup of plastics in landfills are major concerns facing society today. Currently, however, PHAs are significantly more expensive than their petroleum-based counterparts. This is largely due to the cost of carbon sources and of extracting the bioplastics from bacteria. The goal of these studies was to examine replacing traditional carbon sources used in PHA production like sugar and …

Environmental And Animal Benefits When Beef Cattle Consume Condensed And Hydrolysable Tannins, Elizabeth K. Stewart, Juan J. Villalba, Kerry A. Rood

All Current Publications

This fact sheet describes the environmental and animal benefits when cattle consume condensed and hydrolysable tannins, and includes producer concerns.

Salt Tolerance Of Six Switchgrass Cultivars, Youping Sun, Genhua Niu, Girisha Ganjegunte, Yanqi Wu

Plants, Soils, and Climate Faculty Publications

Panicum virgatum L. (switchgrass) cultivars (‘Alamo’, ‘Cimarron’, ‘Kanlow’, ‘NL 94C2-3’, ‘NSL 2009-1’, and ‘NSL 2009-2’) were evaluated for salt tolerance in two separate greenhouse experiments. In experiment (Expt.) 1, switchgrass seedlings were irrigated with a nutrient solution at an electrical conductivity (EC) of 1.2 dS·m−1 (control) or a saline solution (spiked with salts) at an EC of 5.0 dS·m−1 (EC 5) or 10.0 dS·m−1 (EC 10) for four weeks, once a week. Treatment EC 10 reduced the tiller number by 32% to 37% for all switchgrass cultivars except ‘Kanlow’. All switchgrass cultivars under EC 10 had a significant reduction of …

Educational Policies Committee Program Proposal, College Of Agriculture And Applied Sciences, April 27, 2018 – Bachelor Of Science – Nutrition Science, Utah State University

Educational Policies Committee

Utah State University requests approval to offer the following Baccalaureate degree(s): Bachelor of Science - Nutrition Science effective Fall 2018.

Educational Policies Committee Program Proposal, College Of Agriculture And Applied Sciences, April 27, 2018 – Bachelor Of Science In Dietetics, Utah State University

Educational Policies Committee

Utah State University requests approval to offer the following Baccalaureate degree(s): Bachelor of Science in Dietetics effective Fall 2018.

Educational Policies Committee Program Proposal, College Of Agriculture And Applied Sciences, April 27, 2018 – Bachelor Of Science In Food Science, Utah State University

Educational Policies Committee

Utah State University requests approval to offer the following Baccalaureate degree(s): Bachelor of Science in Food Science effective Fall 2018.

Anthropogenic Food Subsidy To A Commensal Carnivore: The Value And Supply Of Human Faeces In The Diet Of Free-Ranging Dogs, James R. A. Butler, Wendy Y. Brown, Johan T. Du Toit

Wildland Resources Faculty Publications

As the global population of free-ranging domestic dogs grows, there is increasing concern about impacts on human health and wildlife conservation. Effective management of dog populations requires reliable information on their diet, feeding behavior, and social ecology. Free-ranging dogs are reliant on humans, but anthropogenic food subsidies, particularly human faeces (i.e., coprophagy) have not previously been fully quantified. In this study we assess the contributions of different food types to the diet, and their influences on the social behaviour of free-ranging dogs in communal lands of rural Zimbabwe, with a focus on coprophagy. Free-ranging dog diets, body condition, and sociology …

Identification Of Genes Directly Responding To Dlk1 Signaling In Callipyge Sheep, Hui Yu, Jolena N. Waddell, Shihuan Kuang, Ross L. Tellam, Noelle E. Cockett, Christopher A. Bidwell

Animal, Dairy, and Veterinary Science Faculty Publications

Background

In food animal agriculture, there is a need to identify the mechanisms that can improve the efficiency of muscle growth and protein accretion. Callipyge sheep provide excellent machinery since the up-regulation of DLK1 and RTL1 results in extreme postnatal muscle hypertrophy in distinct muscles. The aim of this study is to distinguish the genes that directly respond to DLK1 and RTL1 signaling from the genes that change as the result of muscle specific effects.

Results

The quantitative PCR results indicated that DLK1 expression was significantly increased in hypertrophied muscles but not in non-hypertrophied muscles. However, RTL1 was up-regulated in …

Light May Have Triggered A Period Of Net Heterotrophy In Lake Superior, Soren Brothers, Paul Sibley

Ecology Center Publications

Recent studies of Lake Superior, the Earth's largest freshwater lake by surface area, describe it as net heterotrophic (primary production < community respiration), making it a net source of carbon dioxide (CO2) to the atmosphere. This conclusion is largely based on measurements made between 1998 and 2001. We present a long‐term (1968–2016) analysis of ice‐free (April–November) surface oxygen (O2) saturation data collected by monitoring agencies. These data indicate that Lake Superior's surface waters are typically supersaturated with dissolved O2 from May to September (May–September mean is 103.5% ± 0.6%; pooled mean from April, October, and November is 97.6% ± 1.1%, standard error of the mean). However, these data also support prior studies which describe a state of net heterotrophy from 1998 to 2001. We investigated potential triggers for a transient heterotrophic period and discuss the sources of organic carbon necessary to fuel net heterotrophy in a large oligotrophic lake. We conclude that net heterotrophy likely resulted from an increase in light period and penetration driven by declines in cloud cover, increases in water clarity, and a reduction of winter ice cover following the 1997–1998 El Niño. Together, these could have depleted a pre‐existing pool of dissolved organic carbon (DOC) via photomineralization and/or photochemical degradation. Our results indicate that Lake Superior is typically net autotrophic (calculated annual CO2 influx = ∼ 0.4 Tg C). These results highlight how water clarity and aquatic DOC pools may interact to induce net metabolic shifts in large oligotrophic aquatic ecosystems.

Approaches To Evaluating Blended Courses, Mateja R. Savoie-Roskos, Stacy Bevan, Rebecca Charlton, Marlene Israelsen Graf

Journal on Empowering Teaching Excellence

Blended learning, sometimes referred to as hybrid or flexible learning, is becoming increasingly common in higher education. Unfortunately, many instructors receive limited training on how to effectively evaluate blended courses, and as a result, commonly rely solely on end-of-semester evaluations. Due to the more complex nature of how blended courses are designed and implemented, instructors should consider utilizing a variety of course evaluation methods. This article includes researched-based approaches for evaluating blended courses based on feedback from students, peers, and instructional designers. This combination of formalized feedback is offered as one strategy to ensure instructors achieve course learning objectives and …

Full Issue: Journal On Empowering Teaching Excellence, Volume 2, Issue 1

Journal on Empowering Teaching Excellence

The full Spring 2018 issue (Volume 2, Issue 1) of the Journal on Empowering Teaching Excellence.

Use Of Unpalatable Forages By Ruminants: The Influence Of Experience With The Biophysical And Social Environment, Roberto A. Distel, Juan J. Villalba

Wildland Resources Faculty Publications

Unpalatable forage resources (low nutrient density, potentially toxic metabolites) are widespread and represent a challenge for ruminant nutrition, health, and welfare. Our objective was to synthesize the role of biophysical and social experience on the use of unpalatable forages by ruminants, and highlight derived behavioural solutions for the well-being of soils, plants, and animals. Environmental experiences early in life modulate gene expression and promote learning, which alters morpho-physiological and psychological mechanisms that modify behavioural responses and change food and habitat selection. In this process, ruminants can become better adapted to the habitat where they are reared. Moreover, experiential learning provides …

Association Between Food Shopping Motivators And The Home Food Environment, Abiodun Atoloye

Student Research Symposium

Objective: To examine whether the home food environment (HFE) is related to food shopping motivating factors. Method: Supplemental Nutrition Assistance Program participants were interviewed about their HFE, factors motivating them while shopping, and food security status, using Perceived Nutrition Environment Measure Survey and 6-item US Household Food Security Survey questionnaires. Composite home food environment scores were derived by summing availability and accessibility to healthy food and deducting unhealthy access and availability. Analysis included multiple linear regression models. Results: Being motivated by nutrition and food security were positively associated with HFE (ß= 4.70, p= 0.03 and ß= 1.44, p= 0.06 respectively). …

Climate And Soil Nutrients Jointly Determine The Strength Of Density-Dependent Interactions In An Old-Growth Temperate Forest, Sara Germain

Student Research Symposium

A distinct challenge facing ecologists is to understand individual and interactive effects of climate, edaphic characteristics, and biotic relationships on forest ecosystems in order to anticipate and adapt to environmental change. Forest demography is influenced by many ecological processes, including gap-creating to stand-replacing disturbances, pest and pathogen attack, herbivory, shading and crowding, resource competition, heavy metal toxicity, and direct climate impacts. However, a comprehensive assessment of forest demographic responses to these ecological processes can be difficult to accomplish, as seasonal and inter-annual climate variability can interact with biotic and edaphic characteristics to impact individual tree mortality, recruitment, and growth – …

Linear Enamel Hypoplasia And Its Relation To Socioeconomic Class In The 19th Century United States, Amanda Cook

Student Research Symposium

Linear hypoplasia of the dental enamel has long been used as an indicator of physical stress during the tooth year of formation. Enamel hypoplasia present in adult teeth can indicate that the individual experienced growth disturbances during childhood to late adolescence. Through the use of human remains of known origin, age, sex, and socioeconomic background, one can compare childhood stressors according to difference of demographic grouping. This study examines the frequencies of growth disruptions among ethnic and socioeconomic groups of the United States throughout the 20th century. If there are differences in frequencies, do we see this difference increase or …