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Bird And Small Mammal Communities Of Sagebrush-Dominated Mountain Meadows: An Examination Of Meadow Characteristics As Part Of A Hierarchical, Multi-Level Study Of The Wasatch-Cache National Forest, Elizabeth Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sagebrush shrubsteppe ecosystems have increasingly garnered attention as an endangered ecosystem. Ninety nine percent of all sagebrush ecosystems are thought to have been impacted by humans, and over 50% of grassland and shrubsteppe species are believed to be in decline. Most of the research on sagebrush ecosystems has been conducted at lower elevations and in large expanses of sagebrush. A considerable amount of sagebrush is found at higher elevations, often in meadows found within a forest matrix. The role of this high-elevation habitat is poorly understood. We conducted bird, small mammal, vegetation, and soil surveys in sagebrush-dominated mountain meadows within …

Humic And Fulvic Acids: Effects On Plant Nutrition And Growth, Jason Tew

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Humic substances are reported to improve plant growth and nutrient uptake, with iron the most studied nutrient. The most common forms of iron in soils are iron oxides, which are stable under aerobic conditions and unavailable for plant uptake. Iron deficient plants become chlorotic, which reduces growth and yield. To determine if humic substances can reduce iron chlorosis, five commercially available organic acids were tested on maize grown in sand columns at high pH. The dry granular humic acid from Aldrich Chemical Company applied at 84.4 g/liter of sand by volume (5% by mass) and 1 g/liter added with irrigation …

Relationship Between Infant Reactivity And Maternal Emotional Well-Being During The Early Postpartum Period At Two Points In Time, Karen Udy Hansen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study examined the relationship between infants' reactivity and mothers' emotionality during the early postpartum period, specifically during the first days of life and again by three months of age. The Clinical Neonatal Behavioral Scale (CLNBAS) was used to evaluate the infants. The mothers were evaluated at the same time by responding to questions on the Edinburgh Postnatal Depression Scale (EPDS).

Forty-six mother-infant dyads were recruited from the Logan Regional Hospital childbirth classes for first-time parents. Minimum criteria for participation were that the mother must be married, be at least 18 years of age, have at least a high school …

Occupational Aspirations And Migration: A Comparison Of Rural Youth With High, Medium, And Low Occupational Aspirations And Their Chances For Migration, W. Trevor Brooks

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

By using a social psychological approach, this research investigated whether occupational aspirations lead to migration. From the literature, we know that rural youth have lower occupational aspirations than their urban counterparts. We also know that rural youth often lower their occupational aspirations because of the confusion created between the benefits of moving for school and the attachment felt for home. We do not know, however the connection between occupational aspirations and migration. Are young to middle-aged adults in rural areas with higher occupational aspirations more likely to migrate out of rural areas than young to middle-aged adults with lower aspirations? …

Adoptees' Knowledge About And Contact With Birth Parents And Their Adjustment In Adolescence And Young Adulthood, Kyung-Eun Park

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study described adoptees' knowledge of and contact with birth parents in adolescence and young adulthood, and analyzed the relationship between adoptees' knowledge of and contact with birth parents and the adoptees' adjustment in young adulthood. Data for the current study came from the National Longitudinal Study of Adolescent Health (Add Health). In total, 487 adoptees were identified for this study in Wave I (1995) and Wave Ill (2 002). Descriptive and multivariate analyses using logistic regression were conducted.

Adoptees were more likely to be aware of their birth mothers than of their birth fathers and the percentage differences between …

The Relationship Between Parental Attitudes And Behaviors And Their Adult Children's Attitudes Toward Marriage, Divorce, And Marital Counseling, Shawnery L. Mathis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research study consisted of eighty-six pairs (young adult and his or her parent) of participants recruited from freshman and sophomore classes in two Northern Utah Universities. The parents ages ranged from 36-80 and the young adult children's ages ranged from 16-25. This research project examined the participants' demographics, marital satisfaction (of the parents), attitudes toward marriage, attitudes toward divorce, and attitudes toward marital counseling.

Three paired t tests were used to determine whether attitudes toward marriage, divorce, and marital counseling were the same for young adult children and their parents. Multiple regression equations were used to determine what effects …

Computational Scattering Models For Elastic And Electromagnetic Waves In Particulate Media, Timothy Edwin Doyle

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Numerical models were developed to simulate the propagation of elastic and electromagnetic waves in an arbitrary, dense dispersion of spherical particles. The scattering interactions were modeled with vector multipole fields using pure-orbital vector spherical harmonics, and solved using the full vector form of the boundary conditions. Multiple scattering was simulated by translating the scattered wave fields from one particle to another with the use of translational addition theorems, summing the multiple-scattering contributions, and recalculating the scattering in an iterative fashion to a convergent solution. The addition theorems were rederived in this work using an integral method, and were shown to …

The Skull Valley Goshute And Nuclear Waste: Rhetorical Analysis Of Claims-Making Of Opponents And Proponents, Jesse T. Weiss

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

One of the greatest challenges to modem society is the management and disposal of hazardous by-products that have accompanied the industrial advances of the twentieth century. One of the most difficult by-products to deal with has been radioactive waste. Previous research has shown that due to the real and perceived risks associated with this type of waste, the burden of storing said waste has fallen on minority communities, including Native American groups. This research examines the proposed temporary nuclear waste storage facility to be located on the Skull Valley Indian Reservation in Utah. Using an ethnographic case study approach, this …

Influence Of Fall Grazing By Sheep On Plant Productivity, Shrub Age Class Structure And Herbaceous Species Diversity In Sagebrush Steppe, Ryan Duncan Woodland

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Traditional chemical and mechanical treatments of Wyoming Big Sagebrush (Artemisia tridentata ssp. wyomingensis) are costly and have typically focused solely on increasing forage for livestock production. Managing these systems biologically with grazing can potentially reduce costs and increase both biodiversity and understory production as well as rejuvenate Wyoming Big Sagebrush (ARTRWY). This experiment was conducted on Deseret Land and Livestock Ranch in northern Utah in October 2003. One hundred and twenty sheep (dry ewes) grazed 3, 60m x 40m plots (40 sheep plot^-1). Sheep were provided a protein-energy supplement to facilitate use of the secondary metabolites …

Cougar Exploitation Levels In Utah: Implications For Demographic Structure, Metapopulation Dynamics, And Population Recovery, David C. Stoner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Presently, eleven western states and two Canadian provinces utilize sport hunting as the primary mechanism for managing cougar (Puma concolor) populations. However, the impacts of sustained harvest on population dynamics and demographic structure arc not well understood. Additionally, the lack of cost-effective enumeration techniques and strongly conflicting societal values complicate effective management of this species. Given these concerns, the primary goals of this study were (I) to determine the effects of sustained harvest on cougar populations, and (2) estimate the level and extent of cougar harvest statewide.

I monitored cougar populations on Monroe Mountain in south-central Utah, and …

The Effects Of Auditory Stimulation On Academic And Behavior Performance In Children With And Without Attention-Deficit/Hyperactivity Disorder, Penny L. Sneddon

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study evaluated the relationship between noise and academic performance and behavior of children with ADHD (n = 15) and without ADHD (n = 18). Children completed math sheets under four noise conditions: no noise, standard classroom noise, classroom noise with verbalizations, and classroom noise with classical music. There were no differences in math performance between the two groups. Children with ADHD exhibited more problem behaviors than children without ADHD. Group-by-condition interactions were not significant. Significant effects were found for noise condition; children completed more math problems and had fewer inappropriate behaviors in the no-noise condition. However, there …

Power Distance Perceptions In Post-Soviet Russia: Understanding The Workplace Environment, Olga Kamenchuk

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The modem business economy is characterized by increased collaboration among different organizations across nation al boundaries. Post-Soviet Russia is one of the regions that is witnessing rapid economic growth and development of international business relations. Because of the challenges in intercultural communication the current study focuses on the problem of power distance, specifically in the workplace (in post-Soviet Russia).

A phenomenological perspective, based on qualitative methodology, guided this research into the meaning of power experiences for individuals. Symbolic interactionism was used as a research paradigm of the study to view humans as active participants of the workplace, who engage in …

Predictors Of Outcome Of Surgery For Carpal Tunnel Syndrome, Clayton T. Manning

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wrist surgery is a common method for treating carpal tunnel syndrome (CTS) although few studies have examined patient outcomes or predictive correlates of such procedures. The objectives of this study were to characterize Utah workers who received surgery for CTS in terms of relevant presurgical and outcome variables and to identify presurgical correlates of patient outcomes. Participants were 75 Utah workers' compensation patients who underwent surgery for CTS from 1999-2002 and were at least 6 months postsurgery at time of follow-up. A retrospective cohort design was utilized consisting of a review of presurgical medical records and a postsurgical telephone survey. …

Developmental Changes In The Structure Of Affect: Is The Tripartite Model Equally Valid For Younger And Older Children?, Bryan B. Bushman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many studies investigating the validity of the Tripartite model of affect in children have been supportive of the model. However, few studies have examined if older and younger children structure affect similarly. The current study used confirmatory factor analytic techniques (SEM) to test the validity of the tripartite model in two developmentally distinct populations of children (third and sixth grade). Confirmatory factor analytic methods examined one-factor, two-factor correlated, and two-factor uncorrelated models. Furthermore, the pattern of correlations between positive affect (PA), negative affect (NA), and dependent measures of anxiety and depression was calculated.

The results indicated the two-factor correlated and …

Pharmacological And Behavioral Treatments For Migraine Headaches: A Meta-Analytic Review, Kristi Lowe Stewart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Migraine headache is a painful and often serious problem in the United States. There are many prophylactic pharmacological and nonpharmacological treatments available for migraine headaches. However, choosing between them can be difficult for individuals and treatment providers alike. The primary literature regarding the effectiveness of pharmacological and nonpharmacological treatments is quite dense. More than 191 primary studies were identified as providing information about the effectiveness of one or more treatments for migraine headaches. Of these, 82 articles were retained for meta-analyses on six prophylactic treatments for migraine: propranolol, flunarizine, divalproex sodium, thermal biofeedback, relaxation treatments, and combined treatments. These results …

Risk Factors For Selected Health-Related Behaviors Among American Indian Adolescents: A Longitudinal Study, Amy Jo Williams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Suicide and accidents are the leading causes of death among American Indian (AI) adolescents. Engaging in health-compromising behaviors (HCB) is higher among AI youth than among multicultural, national samples of adolescents. These HCBs include: smoking, drinking alcohol, drug use, and delinquency. Studies that identify legitimate predictors of these behaviors among AI adolescents are needed to guide research and interventions.

Primary socialization theory (PST) suggests that peer groups, family, and school are the only areas where adolescents are directly taught to accept or reject deviant or normative behavior. Gateway theory indicates that use of certain drugs by adolescents, such as cigarettes …

Changes In Child Symptomatology Associated With Animal-Assisted Therapy, Catherine C. Woolley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study examined the changes in symptoms of anxiety, depression, and social dysfunction associated with a history of child trauma after adding animal-assisted therapy (AAT) to conventional psychotherapy for adolescents living in a residential treatment facility in northern California. Using a quasiexperimental design, participants were followed over a period of nine weeks, with both groups completing the State-Trait Anxiety Inventory, the Beck Depression Inventory, an abbreviated version of the Beck Depression Inventory, and the Youth Self-Report, and residential staff completing the Youth Outcome Questionnaire at three time points. In addition, the treatment group completed state anxiety and depression assessments before …

The Ability To Taste 6-N-Propylthiouracil (Prop) And Its Relation To A Parent's Emotional Investment In The Infant, Deann Jones

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Research on parenting is increasingly being studied from a biological perspective. An understanding of the biological mechanisms leading to individual differences in maternal behaviors can help direct research toward more focused intervention resulting in closer mother-infant attachment relationships, and therefore, positive child outcomes. This research was a preliminary study that tested mothers' ability to taste a harmless chemical, 6-n-propylthiouracil (PROP), in relation to their responses to a questionnaire about the emotional investment they experience towards their infant. Although research attempting to relate these two variables together has not been carried out before, individual studies show potential links between these two. …

Cattle As Grazing Management And Seed Dispersal Tools For Increasing Native Species Diversity On Great Basin Rangelands, Marina K. Whitacre

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A series of experiments evaluated: 1) the influence of seed intake and gut retention time on seed passage, recovery, and germinability; 2) fecal seeding and broadcast /trampling as techniques to incorporate seeds into a well-established Agropyron desertorum (Fisch.) Schult. stand in Skull Valley , Utah; 3) intensive grazing as a means to reduce Agropyron biomass and increase establishment and survival of seeded species; and 4) the recovery and germinability of seed extracted from dung collected from the field. Two shrubs (Artemisia tridentata Nutt. ssp. wyomingensis Beetle & Young and Atriplex confertifolia Torr. & Frem.), a grass (Elymus elymoides (Raf.) …

Remote Sensing Of Sagebrush Community Structural Patterns Across Scales, Lisa A. Langs

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Throughout the Intermountain West there has been a substantial reduction in both the quantity and quality of sagebrush ecosystems. To assist current range management objectives, numerous efforts have been made to classify and map sagebrush communities using remotely sensed data. However, the amount of detail provided by these broad-scale mapping projects is often limited. This research evaluated the ability of a suite of airborne and satellite imagery to detect sagebrush community structural attributes, specifically percent canopy cover, live cover, density, size-vigor, and spatial arrangement of shrubs. Field data was collected at Camp Williams National Guard Training Facility near Bluffdale, Utah, …

Quantifying Losses Of Understory Forage In Aspen Stands On The Dixie And Fishlake National Forests, Barton R. Stam

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The West has lost up to 60% of its historic aspen stands over the last century, probably as a result of the successional tendency of aspen to be replaced by coniferous species in the absence of periodic fires. One of several major impacts of this change is the loss of understory forage as conifer canopy cover increases. I measured understory biomass in aspen stands ranging from 0% to 81 % absolute conifer cover in the canopy and found that understory production declines exponentially as conifers replace aspen. I also did an economic analysis to determine the value of the forage …

Watershed Management To Control Pollution In The Ayuquila River, Jalisco, Mexico, Luis Manuel Martinez Rivera

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Ayuquila River watershed is important to western Mexico because of its biodiversity, physiography, fisheries resources, and water production. However, human activities are continuingly affecting natural resources within the basin. Soil erosion, as result of land use change, agriculture in steep land, extensive grazing activities and forest fires; and water diversion and pollution of the Ayuquila River are two relevant issues that have affected the natural resources of this watershed.

This river system plays an important role in wildlife conservation, containing 29 fish species, of which 12 are found inside the BRSM. The River also contains nine species of crustacean, …

A Longitudinal Analysis Of Socioeconomic Differences In Obesity And Weight Change During The Early Adult Years, Young-Taek Kim

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Obesity has reached epidemic proportions in American society. However, not enough attention has been given to weight change by temporal and dynamic detailed social characteristics, controlled for unobserved heterogeneities nested in county and state. Using the National Longitudinal Survey Youth (NLSY79), this study examined weight change and its development into unhealthy conditions like being overweight or obese, in relation to change in social characteristics including life course events. This study also examined the social characteristics of remaining at a normal weight through all time intervals over a 19-year period. Using hierarchical linear multilevel analysis, this study found that changes in …

Feeding Behavior Of Sheep In Relation To Kinetics Of Sagebrush Monoterpenes: Implications For Landscape Biodiversity, Luthando E. Dziba

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The sagebrush steppe is one of the most extensive vegetation types in the western US and an important habitat for wild and domestic herbivores. When sagebrush dominates, however, forage and habitat quality decline. Although sagebrush is nutritious, its forage value is reduced by terpenes. A better understanding of how terpenes limit intake is vital for increasing consumption of sagebrush and for enhancing and maintaining biodiversity in the sagebrush-steppe.

To better understand how terpenes in sagebrush limit intake, we studied feeding behavior of sheep in the field, influence of sagebrush monoterpenes on regulation of intake in pens, and the feeding behavior …

Practicum Students' Beliefs About Developmentally Appropriate Practice For Infants And Toddlers, Kaelin Olsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study examined practicum students' beliefs and experiences about developmentally appropriate practice (DAP) prior to a practicum experience and following it. Another goal was to examine differences between the practicum students' majors and their pre- and posttest DAP beliefs and experiences scores. Finally, this investigation sought to determine the differences between practicum students' DAP beliefs and experiences and the amount of time they spent in a practicum setting.

A total of 95 students completing a practicum in the Adele and Dale Young Child Development Laboratory in the infant (Group I) or the 2-year-old classroom (Group 2) participated in the study. …

Role Of Iron In The Mechanism Of Asbestos-Induced Apoptosis In Human Lung And Pleural Target Cells, Aleksander Baldys

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Occupational exposure to asbestos has been associated with increased incidence of pulmonary interstitial fibrosis, mesothelioma of the pleura, and bronchogenic carcinoma. Although the mechanism by which asbestos causes cancer remains unknown, iron associated with asbestos is thought to play a role in the pathogenic effects of fibers.

The aim of this research was to examine and compare the asbestos-induced signaling phenomena in relevant human lung and pleural target cells, and to determine the role of iron from asbestos fibers in these events. Exposure of human airway epithelial (A549) cells, human pleural mesothelial (MET5A) cells, and normal human small airway epithelial …

Nest Location And Nest Recognition In Two Solitary Bee Species Osmia Lignaria Say And Megachile Rotundata (F.) (Hymenoptera: Megachilidae), Christelle Guédot

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The visual and olfactory cues used in short-range orientation, specifically nest location and nest recognition, were studied in two solitary bee species Osmia lignaria Say and Megachile rotundata (F.) Osmia lignaria, the blue orchard bee, is an important pollinator of orchard crops, such as apples, cherries, and almonds; and M. rotundata, the alfalfa leafcutting bee, is used in commercial pollination of alfalfa. The general objective was to better understand how these two species locate their nests and how improving nest location could benefit crop pollination.

The use of proximal visual landmarks at the nesting site was investigated with …

Natural History, Demography, And Home Range Characteristics Of A Southern California Population Of Phrynosoma Mcallii Inhabiting Atypical Habitat, Kirk Setser

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Phrynosoma mcallii inhabiting a topographically complex, sparsely vegetated, "mudhill" terrain site in southern California in 1999 and 2000 had low mortality rates, and small clutch sizes compared to previous data from this species. Females likely produced a single clutch of eggs in each year. Although this population occurs near a heavily used OHV trail, I did not detect any mortality due to OHV use.

Lizards did not center home ranges on obvious habitat features. Lizards maintained smaller home ranges and exhibited greater range fidelity than did lizards at other sites in other years. Phrynosoma mcallii share many area-use characters with …

Response Of A Peatland Ecosystem To Stratospheric Ozone Reduction In Tierra Del Fuego, Thomas Matthew Robson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Tierra del Fuego, at the southernmost tip of South America, is influenced by ozone depletion. The landscape of southern and western Tierra de! Fuego is dominated by peatlands; they are important locally and in the context of global climate change, because they store large quantities of organic carbon.

To determine the influence of solar ultraviolet-B radiation (UV-B) on a Tierra de! Fuego peatland, we selectively filtered solar UV-Bin ten pairs of plots. Polyfluorine filters were used to create the Near-Ambient-UV-B Treatment (90% solar UV-B), and polyester filters to create the Reduced-UV-B Treatment ( 17% solar UV-B). These filters were first …

Host Shifts In Phytophagous Insects: A Mathematical Modeling Perspective, Meenakshi Venkataraman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

I explored changes in predator-prey system stability with the addition of spatial heterogeneity in prey density dependent mortality. The results indicated that this addition led to greater stability for all prey spatial distributions if prey was aggregated or loosely aggregated. These results indicated prey spatial distribution was critical to population stability. I next explored whether predator emigration under the above conditions would lead to a host shift. I used Chesson and Murdoch's templates of host density independent (HDI) aggregation and host density dependent (HDD) aggregation in predators as the basis for my metapopulation models. I varied prey density dependent mortality …