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Aging Texas Well: An Assessment of Denton's Aging-Friendliness

Description: The purpose of this research was to conduct a needs assessment for the city of Denton, Texas to learn how residents view Denton's aging-friendliness. The research design was based on the Texas Department of Aging and Disability Services' Aging Texas Well Toolkit and was funded by a two year grant from that agency. Both qualitative and quantitative methods were used to gather data on six community indicators: demographics, housing, transportation, health care (including mental health and substance abuse services), recreation, and community supports and services. Input from city residents was gathered through focus groups, followed by a survey of the broader community in the city to validate and prioritize the needs identified. The research found gaps in Denton's aging-friendliness. Denton residents feel that although there are some services for the aging in the area, other services are lacking. The top needs identified by residents were a single point of contact for, and better communication about, resources currently available, as well as a need for increased transportation options.
Date: August 2016
Creator: Wolfe, Julia Rachel Weinstein
Partner: UNT Libraries

Analysis of Trace Amounts of Adulterants Found in Powders/Supplements Utilizing Direct Inject, Nanomanipulation, and Mass Spectrometry

Description: The regulations of many food products in the United States have been made and followed very well but unfortunately some products are not put under such rigorous standards as others. This leads to products being sold, that are thought to be healthy, but in reality contain unknown ingredients that may be hazardous to the consumers. With the use of several instrumentations and techniques the detection, characterization and identification of these unknown contaminates can be determined. Both the AZ-100 and the TE2000 inverted microscope were used for visual characterizations, image collection and to help guide the extraction. Direct analyte-probed nanoextraction (DAPNe) technique and nanospray ionization mass spectrometry (NSI-MS) was the technique used for examination and identification of all adulterants. A Raman imaging technique was than introduced and has proven to be a rapid, non-destructive and distinctive way to localize a specific adulterant. By compiling these techniques then applying them to the FDA supplied test samples three major adulterants were detected and identified.
Date: August 2016
Creator: Nnaji, Chinyere
Partner: UNT Libraries

Applied Real-Time Integrated Distributed Control Systems: An Industrial Overview and an Implemented Laboratory Case Study

Description: This thesis dissertation mainly compares and investigates laboratory study of different implementation methodologies of applied control systems and how they can be adopted in industrial, as well as commercial, automation applications. Namely the research paper aims to assess or evaluate eventual feedback control loops' performance and robustness over multiple conventional or state-of-the-art technologies in the field of applied industrial automation and instrumentation by implementing a laboratory case study setup: the ball on beam system. Hence, the paper tries to close the gap between industry and academia by: first, conducting a historical study and background information of main evolutional and technological eras in the field of industrial process control automation and instrumentation. Then, some related basic theoretical as well as practical concepts are reviewed in Chapter 2 of the report before displaying the detailed design. After that, the next Chapter, analyses the ball on beam control system problem as the case studied in the context of this research through reviewing previous literature, modeling and simulation. The following Chapter details the proposed design and implementation of the ball on beam case study as if it is under the introduced distributed industrial automation architecture. Finally, Chapter 5 concludes this work by listing several points leaned, remarks, and observations, and stating possible development and the future vision of this research.
Date: August 2016
Creator: Zaitouni, Wael K
Partner: UNT Libraries

"Black Reparations Film Project: Descendants of Slavery and Institutional Racism"

Description: Black Reparations Film Project: Descendants of Slavery and Institutional Racism is a character driven film that sheds light on the consequences of slavery in the U.S. Through a personal narrative, the viewer comes to understand how these consequences support the argument for slavery reparations. The purpose of the film is to bridge the generational gap in awareness of reparation history. The film can be used to enlighten young Americans of all ethnicities to encourage them to find their purpose in this country, help build better race relations, and work towards building a true democracy.
Date: August 2016
Creator: Hodge, Tuarean M
Partner: UNT Libraries

Coaching Efficacy Beliefs and Transformational Leadership Behaviors: Their Ability to Predict Motivational Climate

Description: This study investigated the relationship between belief in coaching abilities (coaching efficacy beliefs, CEB), transformational leadership behaviors (TLB), and motivational climate development of current strength and conditioning coaches working with high school level athletes. The measures used were the coaching efficacy scale for high school teams (CES II-HST, Myers et al.,2000), the differentiated transformational leadership inventory (DTLI, Callow et al., 2009), and the patterns of adaptive learning scales (PALS, Midgley et al., 2000). It was hypothesized that CEB and TLB would influence motivational climate development, while coaches' background characteristics would correlate with CEB, TLB, and motivational climate development. The 60 coaches who participated reported an average of thirteen (SD=8) years of experience and 51 were Certified Strength and Conditioning Specialists. Coaches reported high efficacy, frequent use of TLB, and development of a moderately high task- and somewhat ego-involving motivational climate. Correlations between demographic variables and CEB, TLB, and motivational climate development revealed three significant relationships: years of experience with CEB, and professional development activities and athlete to coach ratio with ego-involving climate development. CEB and TLB had a strong positive correlation. Two regression analyses were conducted to determine if the outcomes of the CEB and TLB measures predicted motivational climate development. The only significant predictor was TLB positively predicting development of a task-involving motivational climate. Strength coaches can utilize the findings of this study help shape their leadership behaviors and develop a task-involving motivational climate that emphasizes effort, improvement, and cooperative learning and is optimal for athlete development and performance.
Date: August 2016
Creator: Runge, Michael J
Partner: UNT Libraries

Compostable Soy-Based Polyurethane Foam with Kenaf Core Modifiers

Description: Building waste and disposable packaging are a major component in today's landfills. Most of these are structural or thermally insulative polymer foams that do not degrade over a long period of time. Currently, there is a push to replace these foams with thermoplastic or biodegradable foams that can either be recycled or composted. We propose the use of compostable soy-based polyurethane foams (PU) with kenaf core modifiers that will offer the desired properties with the ability to choose responsible end-of-life decisions. The effect of fillers is a critical parameter in investigating the thermal and mechanical properties along with its effect on biodegradability. In this work, foams with 5%, 10%, and 15% kenaf core content were created. Two manufacturing approaches were used: the free foaming used by spray techniques and the constrained expansion complementary to a mold cavity. Structure-property relations were examined using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), thermal conductivity, compression values, scanning electron microscopy (SEM), x-ray micro-computed tomography (micro-CT), and automated multiunit composting system (AMCS). The results show that mechanical properties are reduced with the introduction of kenaf core reinforcement while thermal conductivity and biodegradability display a noticeable improvement. This shows that in application properties can be improved while establishing a responsible end-of-life choice.
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Date: August 2016
Creator: Hoyt, Zachary
Partner: UNT Libraries

Conceptual Framework for the Development of an Air Quality Monitoring Station in Denton, Texas

Description: Denton, Texas consistently reaches ozone nonattainment levels. This has led to a large focus of air pollution monitoring efforts in the region, with long-range transport being explored as a key contributor. For this study, the University of North Texas Discovery Park campus was chosen as a prospective location for an extensive air quality monitoring station. Sixteen years of ozone and meteorological data for five state-run monitoring sites within a 25 mile radius, including the nearest Denton Airport site, was gathered from TCEQ online database for the month of April for the years 2000 to 2015. The data was analyzed to show a historical, regional perspective of ozone near the proposed site. The maximum ozone concentration measured at the Denton Airport location over the 16 year period was measured at 96 ppb in 2001. Experimental ozone and meteorological measurements were collected at the Discovery Park location from March 26 to April 3 and April 8 to April, 2016 and compared to the Denton Airport monitoring site. A time lag in ozone trends and an increase in peak ozone concentrations at the proposed location were observed at the proposed site in comparison to the Denton Airport site. Historical and experimental meteorological data agreed in indicating that southern winds that rarely exceed 20 miles per hour are the predominant wind pattern. Back trajectories, wind roses, pollution roses, and bivariate plots created for peak ozone days during experimental periods support long range transport as a considerable cause of high ozone levels in Denton. Furthermore, a study of the precursor characteristics at the Denton Airport site indicated the site was being affected by a local source of nitrogen dioxide that was not affecting the proposed location. The differences in the Denton Airport site and the proposed site indicate that further monitoring at Discovery Park would ...
Date: August 2016
Creator: Boling, Robyn
Partner: UNT Libraries

Constructional Fear Treatment for Dogs in Shelters

Description: Of the approximately 3.9 million dogs that enter US animal shelters each year, many exhibit behaviors related to fear, which can affect their likelihood of adoption. Current dog training procedures to treat fear include counterconditioning and desensitization, which can often take months or years to show any behavior change and do not teach specific behaviors aimed to increase the dog's chance of being adopted. The current study used a negative reinforcement shaping procedure to teach fearful dogs to approach and and interact with people. The results showed that constructional fear treatment increased the amount of time the dog spent at the front of the kennel, and increased sniffing, tail wagging, and accepting petting for all 3 participants.
Date: August 2016
Creator: Katz, Morgan
Partner: UNT Libraries

Context Matters: How Feminist Movements Magnify Feminist Opinion of Progressive Policies in South America

Description: What explains the inconsistency of female empowerment in South America, despite high levels of institutional inclusion? Generally, the social sciences tend to lean on the tenets of liberal feminism in order to measure the development of gender-inclusive policy changes; however, their findings indicate that higher levels of institutional inclusion does not necessarily translate into the empowerment of women as a group. Further, within political science, there is little research addressing the relationship between feminist movements and the feminist opinion of individuals within a state. I argue that strong feminist social movements provide a context in which feminist opinion is magnified, and where individuals will be more likely to support progressive policy changes. Using questions from the World Values Survey, I operationalize progressive policies as the Justifiability of Abortion. My primary independent variables are the presence feminist movements and the presence of feminist opinion, which is measured by support for female sexual freedom. After using a multilevel mixed-effects linear regression, I find support for my hypotheses, indicating that feminist opinion is magnified by the presence of feminist movements.
Date: August 2016
Creator: Ferris, Rachel E
Partner: UNT Libraries

"Counting Out The Harvest"

Description: "Counting Out The Harvest" is a collection of poems exploring intimate encounters. The poems reflect on encounters with memories, family, and the natural and cosmic worlds. In one of the poems, "Red-Throated Anole," the speaker works desperately to save a small dying lizard. In "Ice Storm, Post-Divorce," the speaker attempts to decipher a cluster of ladybugs taking refuge in her room. In the title poem, a couple wonders patiently if their crop will eventually grow. In each of these poems there is a present longing for the construction of a meaningful identity by means of the encounter, but the intersection between speaker and world falls short of satisfaction, whether the faultiness lies in the body's inability to find full sustenance, or in the ever-changing fluidity of memory to find stability. But the poems progress from pressing against this difficulty toward finding a contented resignation to the world's cyclical order. The final line of the manuscript, "disrobe a layer to begin again," indicates an arrival at satisfaction, which is found ultimately in continuation.
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Date: August 2016
Creator: Lischau, Carol
Partner: UNT Libraries

Cytochrome P450 Gene Expression Modulates Anoxia Sensitivity in Caenorhabditis Elegans

Description: With an increasing population suffering from obesity or Diabetes Mellitus (DM), it is more pertinent than ever to understand how physiological changes impact cellular processes. Patients with DM often suffer from obesity, hyperglycemia, altered fatty acids that contribute to vascular dysfunction, and increased risk to ischemia. Caenorhabditis elegans is a model system used to study the conserved insulin signaling pathway, cellular responses in whole organisms and the impact a glucose diet has on oxygen deprivation (anoxia) responses. RNA-sequencing (RNA-Seq) was used to analyze the expression of genes in the anoxia sensitive populations of N2 (wild-type) fed glucose and hyl-2(tm2031), a mutant with altered ceramide metabolism. Comparison of the altered transcripts in the anoxia sensitive populations revealed 199 common transcripts- 192 upregulated and 7 downregulated. One of the gene families that have altered expression in the anoxia sensitive populations encode for Cytochrome P450 (CYP). CYPs are located both in the mitochondria and endoplasmic reticulum (ER), but the CYPs of interest are all predicted to be mainly subcellularly localized to the ER. Here, I determined that knock-down of specific cyp genes, using RNA interference (RNAi), increased anoxia survival in N2 animals fed a standard diet. Anoxia sensitivity of the hyl-2(tm2031) animals was supressed by RNAi of cyp-25A1 or cyp-33C8 genes. These studies provide evidence that the CYP detoxification system impacts oxygen deprivation responses. using hsp-4::GFP animals, a transcriptional reporter for ER unfolded protein response (UPR), I further investigated the impact of cyp knock-down, glucose, and anoxia on ER UPR due to the prediction of CYP-33C8 localization to the ER. Glucose significantly increased ER UPR and cyp knock-down non-significantly increased ER UPR. Measurements of ER UPR due to anoxia were made difficult, but representative images show an increase in ER stress post 9-hour anoxia exposure. This study provides evidence that glucose affects ER ...
Date: August 2016
Creator: Quan, Daniel L
Partner: UNT Libraries

The Design and Implementation of an Effective Vision-Based Leader-Follower Tracking Algorithm Using PI Camera

Description: The thesis implements a vision-based leader-follower tracking algorithm on a ground robot system. One camera is the only sensor installed the leader-follower system and is mounted on the follower. One sphere is the only feature installed on the leader. The camera identifies the sphere in the openCV Library and calculates the relative position between the follower and leader using the area and position of the sphere in the camera frame. A P controller for the follower and a P controller for the camera heading are built. The vision-based leader-follower tracking algorithm is verified according to the simulation and implementation.
Date: August 2016
Creator: Li, Songwei
Partner: UNT Libraries

Development of a Self-Report Measure of Post-Traumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD) According to the Eleventh Edition of the International Classification of Diseases (ICD-11): The Complex Trauma Inventory

Description: The work group editing trauma disorders for the upcoming edition of the International Classification of Diseases (ICD-11) made several changes. Specifically, they significantly simplified the guidelines for post-traumatic stress disorder (PTSD) and added a new trauma disorder called complex PTSD (CPTSD). The new domains for PTSD and the addition of CPTSD require new instruments to assess these novel constructs. We developed a measure of PTSD and CPTSD (Complex Trauma Inventory; CTI) according to the proposed ICD-11 domains, creating several items to assess each domain. We examined the factor structure of the CTI (using both exploratory and confirmatory factor analyses) in two separate samples of diverse college students (n1 = 501; n2 = 500), reducing the original 53 trauma items in the item pool to 21 items. Confirmatory factor analyses supported two highly-correlated second-order factors (PTSD and complex factors), with PTSD (i.e., re-experiencing, avoidance, hyper-arousal) and complex factors (i.e., affect dysregulation, alterations in self-perception and alterations in relationships with others) each loading on three of the six ICD-11-consistent first-order factors (RMSEA = .08, CFI = .92, GFI = .87, SRMR = .06). Internal consistency for PTSD (α = .92) and complex factors (α = .93) are excellent.
Date: August 2016
Creator: Litvin, Justin M
Partner: UNT Libraries

Does Downhill Running Alter Monocyte Susceptibility to Apoptosis?

Description: Introduction/purpose: Recovery from muscle damage involves a type of programmed cell death known as apoptosis. Damage Associated Molecular Patterns (DAMPs) are released after muscle damage and may cause premature apoptosis in monocytes infiltrating the damaged site. This may alter the time course of events towards recovery. Therefore, the purpose of this study was to investigate if downhill running causes a change in the susceptibility of monocytes to apoptosis. Methods: Participants (5 male, 6 female) completed a downhill running protocol consisting of 6-5 minute bouts at a speed of 6-9mph on a -15% grade treadmill. Venous blood samples were collected immediately pre-exercise (PRE), in addition to 4 -h, 24 -h and 48 -h post-exercise. Creatine kinase (CK) was measured to give an indication of muscle damage. Monocytes were analyzed by flow cytometry for expression of multicaspase and annexin v reagent was used to detect changes in the plasma membrane. A MILLIPLEX MAP human early apoptosis magnetic bead 7-plex kit (EMD Millipore, Billerica, MA) was used to assess the relative concentration of phosphorylated protein kinase B (Akt), Bcl-2 associated death promoter (BAD), B cell lymphoma-2 (Bcl-2), active caspase-8, active caspase-9, c jun N terminal kinase (JNK) and tumor protein p53 by Luminex multiplex assay. Results: CK peaked at 24- h. Monocytes showed greater expression of multicaspase at 24 –h and 48 -h than at PRE. Bcl-2, p53 and caspase-8 were all significantly greater at 24 –h than at PRE. Conclusion: Downhill running did alter the apoptotic response of monocytes and therefore may be important in the recovery process from muscle damage.
Date: August 2016
Creator: Pennel, Kathryn Ann Foster
Partner: UNT Libraries

The Effects of Fluency-Based Instruction on the Identification of Component Reading Skills

Description: This study examined the effects of fluency-based instruction on the identification of six component-composite relations for early reading skills. Five participants (ages 5-8) who struggled with reading participated. A multiple probe design was used to assess the effects of frequency building on prerequisite skills on the emergence of composite reading skills. The results show that the prerequisite skills taught did not have an effect on the composite skill probes but did have an effect on the assessment scores. The data expand the research pertaining to Precision Teaching, fluency-based instruction, and component-composite relations. These data suggest that additional skills may be needed to be taught in order to effects on the composite skills. In addition, these authors identify the need for the identification of the component skills necessary to teach rapid autonomic naming.
Date: August 2016
Creator: Bandy, Darren
Partner: UNT Libraries

The Effects of Naturalistic Language Interventions in Children with Autism

Description: Several evidence-based procedures based upon operant learning principles have been developed to teach language, and for young children with autism spectrum disorder (ASD), naturalistic interventions are commonly implemented as they are both effective and developmentally appropriate. The current investigation compared contingent responsive intervention and combined intervention on the effects of language use in four children diagnosed with ASD. Results suggest that a combined intervention procedure increases target language and requests in children with simplified language (e.g., one-word phrase) as well as complex language (e.g., simple sentences).
Date: August 2016
Creator: Degner, Brittany
Partner: UNT Libraries

Effects of UE Speed on MIMO Channel Capacity in LTE

Description: With the introduction of 4G LTE, multiple new technologies were introduced. MIMO is one of the important technologies introduced with fourth generation. The main MIMO modes used in LTE are open loop and closed loop spatial multiplexing modes. This thesis develops an algorithm to calculate the threshold values of UE speed and SNR that is required to implement a switching algorithm which can switch between different MIMO modes for a UE based on the speed and channel conditions (CSI). Specifically, this thesis provides the values of UE speed and SNR at which we can get better results by switching between open loop and closed loop MIMO modes and then be scheduled in sub-channels accordingly. Thus, the results can be used effectively to get better channel capacity with less ISI. The main objectives of this thesis are: to determine the type of MIMO mode suitable for a UE with certain speed, to determine the effects of SNR on selection of MIMO modes, and to design and implement a scheduling algorithm to enhance channel capacity.
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Date: August 2016
Creator: Shukla, Rahul
Partner: UNT Libraries

Evaluation of an Observation and Training System to Increase Play Skills in Young Children with Autism

Description: Play is considered to be important for the development of young children in that it provides a means to expand their interests, promote engagement and learning, and increase social interactions. Children with autism, however, display deficits in play skills, such as lack of pretend play and rigid or stereotyped manners of play. Research suggests supported play techniques, such as reciprocal imitation training, play expansions, and scaffolding increase play skills in children diagnosed with autism. The current study evaluated the effects of a training package to teach staff members supported play techniques to six young children diagnosed with autism. The study employed a concurrent multiple baseline design across two preschool classrooms. The results suggest that the training package successfully increased staff member use of the supported play techniques and child and staff engagement. The training, however, did not have consistent effects on child social engagement (proximity, attending, and initiating) or on the types of child play (simple manipulation, advanced manipulation, and pretend play). Staff member responses to the post-intervention satisfaction and feedback survey were positive and the results are discussed in the context of the observation procedures and directions for future studies.
Date: August 2016
Creator: Van Meter, Sarah M
Partner: UNT Libraries

An Exploration of College Attitudes among Sioux Falls High School Students

Description: Since the recession of 2008, there has been an increased scrutiny of higher education, with little research done on how this affects high school students' college search process. This study seeks to understand how college perceptions are formed and how they affect the college decision process of high school students in Sioux Falls, South Dakota. In order to gain a holistic perspective of this process, this study utilized a mixed method approach of analyzing public data, conducting interviews with community members and students, conducting a focus group with high school guidance counselors, and administering a survey to high school students. This study found that students in this area form their perceptions of college in three distinct phases and that these phases affect a student's college priorities. Special attention was given to how academics, cost and location contributed to a student's overall college decision. These findings can be used to assist faculty and staff at higher education institutions in creating effective messaging and programming that relate to this group of students.
Date: August 2016
Creator: Duesterhoeft, Kristin
Partner: UNT Libraries

Feasibility Study of Consolidation by Direct Compaction and Friction Stir Processing of Commercially Pure Titanium Powder

Description: Commercially pure titanium can take up to six months to successfully manufacture a six-inch in diameter ingot in which can be shipped to be melted and shaped into other useful components. The applications to the corrosion-resistant, light weight, strong metal are endless, yet so is the manufacturing processing time. At a cost of around $80 per pound of certain grades of titanium powder, the everyday consumer cannot afford to use titanium in the many ways it is beneficial simply because the number of processing steps it takes to manufacture consumes too much time, energy, and labor. In this research, the steps it takes from the raw powder form to the final part are proposed to be reduced from 4-8 steps to only 2 steps utilizing a new technology that may even improve upon the titanium properties at the same time as it is reducing the number of steps of manufacture. The two-step procedure involves selecting a cylindrical or rectangular die and punch to compress a small amount of commercially pure titanium to a strong-enough compact for transportation to the friction stir welder to be consolidated. Friction stir welding invented in 1991 in the United Kingdom uses a tool, similar to a drill bit, to approach a sample and gradually plunge into the material at a certain rotation rate of between 100 to 2,100 RPM. In the second step, the friction stir welder is used to process the titanium powder held in a tight holder to consolidate into a harder titanium form. The resulting samples are cut to expose the cross section and then grinded, polished, and cleaned to be observed and tested using scanning electron microscopy (SEM), electron dispersive spectroscopy (EDS), and a Vickers microhardness tester. The results were that the thicker the sample, the harder the resulting consolidated sample ...
Date: August 2016
Creator: Nichols, Leannah Marie
Partner: UNT Libraries

Green To-Go: Evaluating the Effectiveness of an Intervention Package on Restaurateurs' use of Styrofoam Take-Out Containers

Description: Restauranteurs' use of Styrofoam take-out containers was evaluated using an intervention package containing informational components, a written commitment, and an incentive system. A decrease in the use of Styrofoam take-out materials was observed with 4 of 6 restaurants. Across all participants, we observed a 15.7% increase in alternative containers and a 15.7% decrease in Styrofoam containers. Overall, a decreased use of Styrofoam take-out containers was observed with restaurateurs who were able to identify suitable alternative products.
Date: August 2016
Creator: Ho, Kelly
Partner: UNT Libraries

Identification of a Potential Factor Affecting Graduation Rates in STEM for Hispanic Students at the University of North Texas, via Analysis of Nonfiction Science Books in Spanish Language for ELLs in the Dallas ISD Schools

Description: Latinos are the largest minority group in the U.S.; however despite the continuous growth of the Hispanic population, Latinos are severely underrepresented in STEM fields. One of the reasons that might explain why Latinos do not major in STEM is the way they encounter science curriculum in primary school. Students' limited proficiency in English may constrain their science achievement when instruction is delivered exclusively in English. A quantitative analysis with graduation rates in STEM from 2009 to 2014 at the University of North Texas was conducted, finding that there is a significant difference (p<0.05) in the number of bachelor's degrees in STEM between Hispanic, White, African American and other student populations. Interviews with teachers, librarians and publishing companies were performed to describe the limited science literature in Spanish at the Dallas ISD schools. Improving science literacy by teaching according to ELLs' linguistic skills and culture may lead to a better understanding of science curriculum throughout their education, which may translate into higher college graduation rates by Hispanic recipients in STEM.
Date: August 2016
Creator: Garcia Colin, Monica
Partner: UNT Libraries

Imagining the Empire: Germany Through the Eyes of Early Modern English Travellers

Description: This thesis is a study of early modern English travel narratives and the ways they presented the German states and their people to the public through the medium of print. It is based on an analysis of forty seven published travel narratives written by men and women who toured Germany and wrote about their experiences. The study situates these writings in the context of the growing sense of national identity in early modern Europe and offers an assessment of how these travel narratives contributed to a uniquely English understanding of Germany. As English travel narratives about Germany in the early modern period evolved, writers highlighted distinctive characteristics they believed Germans possessed, and compared their subjects to themselves. Travelers presented diverse and even conflicting views on a variety of subjects related to Germany. Nevertheless, by the late eighteenth century, English travelers had fashioned a common set of images, stereotypes, and characteristics of Germany and its people.
Date: August 2016
Creator: Micheals, Isaac
Partner: UNT Libraries

The Impact of Chinese Privet (Ligustrum Sinense) on the Survival and Re-Establishment of Native Plants at the Dallas Floodway Extension

Description: Invasive woody shrubs are a problem when they displace native species and threaten habitats, especially those that harbor rare or endangered species. They not only compete with native plants, but also alter habitat and food that many organisms depend upon. Invasive plants undergo a release from their specialist predators in the nonnative range, providing them advantages over native species. Because modes and pathways of how invasive species spread are not fully understood, predicting spread and implementing restoration ecological controls remain inexact. Due to the lack of comparative studies on woody shrubs, especially invasive privets, we understand very little about conditions affecting their invasiveness. A study was conducted near Dallas, Texas to determine if privet has allelopathic properties that influences growth of native plants. Soil nutrients and other analyses were made and compared between field plots supporting privet, plots in which privet has been removed, and plots where privet has not been observed. In some field plots, natives were planted under the three previously mentioned conditions, and their survival and condition were monitored to evaluate effects of privet on their establishment and growth. It was found that Chinese privet did hinder seed germination in red mulberry, soapberry and beautyberry and root formation in beautyberry cuttings. The soil in the sites were found to be normal for bottomland forests that endured two flooding events within one year.
Date: August 2016
Creator: Barnett, Jennifer M
Partner: UNT Libraries