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Mixing It Up: The Impact Of Episodic Introgression On The Evolution Of High-Latitude Mesocarnivores, Jocelyn P. Colella 2022 University of New Mexico

Mixing It Up: The Impact Of Episodic Introgression On The Evolution Of High-Latitude Mesocarnivores, Jocelyn P. Colella

Biology ETDs

At high latitudes, climatic oscillations have triggered repeated episodes of organismal divergence by geographically isolating populations. For terrestrial species, extended isolation in glacial refugia – ice-free regions that enable terrestrial species persistence through glacial maxima – is hypothesized to stimulate allopatric divergence. Alternatively, upon glacial recession, divergent populations expanded from independent glacial refugia and often contacted other diverging populations. In the absence of reproductive isolating mechanisms, this biogeographic process may trigger hybridization and ultimately, gene flow between divergent taxa. My dissertation research aims to understand how these episodic periods of isolation and contact have impacted the evolution of high latitude species. To ...


The Neurobiology Of The Healing Arts: Expressive Arts Therapy As An Effective Treatment For Adults Diagnosed With Complex Ptsd Due To Complex Trauma In Childhood: A Literature Review, Cheryl Ratliff 2022 Lesley University

The Neurobiology Of The Healing Arts: Expressive Arts Therapy As An Effective Treatment For Adults Diagnosed With Complex Ptsd Due To Complex Trauma In Childhood: A Literature Review, Cheryl Ratliff

Expressive Therapies Capstone Theses

Empirically based therapies for posttraumatic stress disorder (PTSD) have been found to be less effective in treating more severe trauma presentations such as complex PTSD (CPTSD). Neurobiological investigation provides a framework for examining the physical and psychological effects of trauma on brain and nerve structures and provides insight into how to effectively treat CPTSD. This literature review examined symptomology of CPTSD resulting from complex trauma in childhood, neurobiological effects of trauma and their implications for treatment, and the efficacy of the current treatment models, primarily those of eye movement desensitization and reprocessing (EMDR), narrative exposure therapy (NET), and somatic psychotherapies ...


Understanding Caribou Population Cycles, Jack R. St. John 2022 University of Montana

Understanding Caribou Population Cycles, Jack R. St. John

Undergraduate Theses, Professional Papers, and Capstone Artifacts

The complex population dynamics of caribou (Rangifer tarandus) were studied to determine the patterns of their population cycles and the processes driving them. It is well established, via previous archaeological research and Indigenous knowledge, that large migrating caribou herds found in and around the tundra at northern latitudes experience population boom and busts roughly every several decades. However, the processes driving the dynamics of these cycles are relatively unknown, which makes managing caribou herds for recreational and subsistence harvests difficult. It has been hypothesized that a combination of intrinsic and extrinsic factors shape these cycles, with density-dependence, predation, harvest, climate ...


Restoring Polyhyrdoxybutyrate (Phb) Depolymerase Expression In A Bald Mutant Of Streptomyces Sp. Sfb5a, Youmna Moawad 2021 Bridgewater College

Restoring Polyhyrdoxybutyrate (Phb) Depolymerase Expression In A Bald Mutant Of Streptomyces Sp. Sfb5a, Youmna Moawad

Honors Projects

Polyhydroxybutyrate (PHB) is a biodegradable, plastic-like polymer produced by some bacteria and degraded by others. The filamentous bacterium Streptomyces sp. SFB5A degrades PHB for growth using an extracellular PHB depolymerase, encoded by the phaZ gene. A morphological mutant of this bacterium, bld4, cannot form aerial filaments and cannot produce PHB depolymerase, despite having the phaZ gene. The inability to synthesize PHB depolymerase may be due to a mutation in a gene encoding one of its transcriptional regulators. A gene (lrp) coding for a potential transcriptional regulator is located 2,700 base pairs upstream from phaZ. Our goal was to clone ...


Rare And Low Frequency Genomic Variants Impacting Neuronal Functions Modify The Dup7q11.23 Phenotype, Farah Qaiser, Yue Yin, Carolyn B. Mervis, Colleen A. Morris, Bonita P. Klein-Tasman, Elaine Tam, Lucy R. Osborne, Ryan K.C. Yuen 2021 University of Toronto

Rare And Low Frequency Genomic Variants Impacting Neuronal Functions Modify The Dup7q11.23 Phenotype, Farah Qaiser, Yue Yin, Carolyn B. Mervis, Colleen A. Morris, Bonita P. Klein-Tasman, Elaine Tam, Lucy R. Osborne, Ryan K.C. Yuen

School of Medicine Faculty Publications

© 2021, The Author(s). Background: 7q11.23 duplication (Dup7) is one of the most frequent recurrent copy number variants (CNVs) in individuals with autism spectrum disorder (ASD), but based on gold-standard assessments, only 19% of Dup7 carriers have ASD, suggesting that additional genetic factors are necessary to manifest the ASD phenotype. To assess the contribution of additional genetic variants to the Dup7 phenotype, we conducted whole-genome sequencing analysis of 20 Dup7 carriers: nine with ASD (Dup7-ASD) and 11 without ASD (Dup7-non-ASD). Results: We identified three rare variants of potential clinical relevance for ASD: a 1q21.1 microdeletion (Dup7-non-ASD) and two ...


Discerning The True Dilemma Of Diabetes Among Hispanics, Ramon Ponce 2021 Dominican University of California

Discerning The True Dilemma Of Diabetes Among Hispanics, Ramon Ponce

Nursing | Senior Theses

There is a common misconception that the primary role of nurses is to follow doctors’ orders and treat patients who are currently suffering and experiencing pain. Chronic illnesses such as diabetes can be prevented and better managed if the population who is greatest at risk is better informed and educated on the disease. Different cultures and ethnicities have different foods that unfortunately puts them at risk to get diabetes. Hispanics typically follow a diet that is high in carbohydrates, saturated fats, and sugars that greatly contribute to the development of diabetes. Often, Hispanics are not educated enough to comprehend the ...


Understanding Students’ Global Interdependence In Science Instruction, Walter S. Smith 2021 Texas Tech University

Understanding Students’ Global Interdependence In Science Instruction, Walter S. Smith

Journal of Global Education and Research

Multiple American educational organizations such as the National Education Association, Association for Supervision and Curriculum Development, and the Council of Chief State School Officers have advocated for globalizing the K-12 curriculum. The National Science Teaching Association (NSTA) in a position statement on international education and the Next Generation Science Standards have produced goals and standards for internationalizing the science curriculum by addressing topics such as climate change, environment, and disease that cross borders. In contrast to those pronouncements on the curriculum, this article views global science education through an instructional lens that focuses on a students’ global interdependence in science ...


Environmental Rnai Pathways In The Two-Spotted Spider Mite, Mosharrof Mondal, Jacob Peter, Obrie Scarbrough, Alex Flynt 2021 The University of Arizona

Environmental Rnai Pathways In The Two-Spotted Spider Mite, Mosharrof Mondal, Jacob Peter, Obrie Scarbrough, Alex Flynt

Faculty Publications

© 2020, The Author(s).

Background:RNA interference (RNAi) regulates gene expression in most multicellular organisms through binding of small RNA effectors to target transcripts. Exploiting this process is a popular strategy for genetic manipulation and has applications that includes arthropod pest control. RNAi technologies are dependent on delivery method with the most convenient likely being feeding, which is effective in some animals while others are insensitive. The two-spotted spider mite, Tetranychus urticae, is prime candidate for developing RNAi approaches due to frequent occurrence of conventional pesticide resistance. Using a sequencing-based approach, the fate of ingested RNAs was explored to identify ...


Local Environmental Variables Are Key Drivers Of Ant Taxonomic And Functional Beta-Diversity In A Mediterranean Dryland, Clara Frasconi Wendt, Ana Ceia-Hasse, Alice Nunes, Robin Verble, Giacomo Santini, Mário Boieiro, Cristina Branquinho 2021 Missouri University of Science and Technology

Local Environmental Variables Are Key Drivers Of Ant Taxonomic And Functional Beta-Diversity In A Mediterranean Dryland, Clara Frasconi Wendt, Ana Ceia-Hasse, Alice Nunes, Robin Verble, Giacomo Santini, Mário Boieiro, Cristina Branquinho

Biological Sciences Faculty Research & Creative Works

The decomposition of beta-diversity (β-diversity) into its replacement (βrepl) and richness (βrich) components in combination with a taxonomic and functional approach, may help to identify processes driving community composition along environmental gradients. We aimed to understand which abiotic and spatial variables influence ant β-diversity and identify which processes may drive ant β-diversity patterns in Mediterranean drylands by measuring the percentage of variation in ant taxonomic and functional β-diversity explained by local environmental, regional climatic and spatial variables. We found that taxonomic and functional replacement (βrepl) primarily drove patterns in overall β-diversity (βtot). Variation partitioning analysis showed ...


Physiological Processes, Chirag B. Raval 2021 CUNY City College

Physiological Processes, Chirag B. Raval

Open Educational Resources

Physiological Processes is designed to introduce fundamental concepts of physiology to biomedical engineering learners. Areas covered include: neural, muscular, cardiovascular, respiratory and renal system function; bioelectrical signals, capillary-level transport, organ-level exchange. Whenever possible, analysis will be quantitative in order to fulfill the course goals and to build the foundation for the subsequent biomedical engineering curriculum. This course is for Biomedical Engineering majors only.


Influence Of A Hydrocarbon Side Chain On The Performance Of Physaria Fendleri-Castor Oil Polyurethane Packaging Adhesives, Alexandra Ivey, Joey Talbert, Roque Evangelista, Keith Vorst, Greg Curtzwiler 2021 Iowa State University

Influence Of A Hydrocarbon Side Chain On The Performance Of Physaria Fendleri-Castor Oil Polyurethane Packaging Adhesives, Alexandra Ivey, Joey Talbert, Roque Evangelista, Keith Vorst, Greg Curtzwiler

Food Science and Human Nutrition Publications

Polyurethanes (PU) are an important class of materials used in various applications across industries. With increased global interest in sustainable and environmentally benign packaging, there is high demand to replace traditional petroleum-based materials with renewable, bio-derived sources. This research developed PU adhesives for multilayer flexible food packaging using Physaria fendleri oil (formerly Lesquerella fendleri) and Ricinus communis (Castor oil), each possessing naturally occurring hydroxyl functional groups. Physaria oil has, on average, hydroxyl functionality on two of the three fatty acids compared to all three for Castor oil; therefore systematically varying the concentration of each oil and maintaining a constant crosslink ...


Insights Into Halophilic Microbial Adaptation: Analysis Of Integrons And Associated Genomic Structures And Characterization Of A Nitrilase In Hypersaline Environments, Sarah Sonbol 2021 American University in Cairo

Insights Into Halophilic Microbial Adaptation: Analysis Of Integrons And Associated Genomic Structures And Characterization Of A Nitrilase In Hypersaline Environments, Sarah Sonbol

Theses and Dissertations

Hypersaline environments are extreme habitats that can be exploited as biotechnological resources. Here, we characterized a nitrilase (NitraS-ATII) isolated from Atlantis II Deep brine pool. It showed higher thermal stability and heavy metal tolerance compared to a closely related nitrilase.

We also studied integrons in halophiles and hypersaline environments. Integrons are genetic platforms in which an integron integrase (IntI) mediates the excision and integration of gene cassettes at specific recombination sites. In order to search for integrons in halophiles and hypersaline metagenomes, we used a PCR-based approach, in addition to different bioinformatics tools, mainly IntegronFinder.

We found that integrons and ...


Tree Responses To Moderate And Extreme Drought In The Northeastern United States, Ruth A. van Kampen 2021 University of Maine

Tree Responses To Moderate And Extreme Drought In The Northeastern United States, Ruth A. Van Kampen

Electronic Theses and Dissertations

Climate change is expected to lead to novel drought conditions in the Northeastern United States. Therefore, experimental studies that mimic these conditions are crucial to understand the potential impact on forests. Further, recent large scale dendrochronological studies suggest that spring and summer droughts may immediately impact tree growth while fall droughts may cause delayed impacts on growth the following growing season. Therefore, in this study, we investigated the impacts of six-week-long spring, summer, and fall droughts on the physiology and intra-annual growth on 288 saplings of six tree species native to the Northeastern United States. These species (deciduous broadleaf angiosperms ...


Predicting The Spatiotemporal Exposure Of Aquatic Species To Intrusions Of Fire Retardant In Streams With Limited Data, Chris R. Rehmann, P. Ryan Jackson, Holly J. Puglis 2021 Iowa State University

Predicting The Spatiotemporal Exposure Of Aquatic Species To Intrusions Of Fire Retardant In Streams With Limited Data, Chris R. Rehmann, P. Ryan Jackson, Holly J. Puglis

Civil, Construction and Environmental Engineering Publications

Because fire retardant can enter streams and harm aquatic species including endangered fish, agencies such as the U.S. Forest Service (USFS) must estimate the downstream extent of toxic effects every time fire retardant enters streams (denoted as an “intrusion”). A challenge in estimating the length of stream affected by the intrusion and the exposure time of species in the affected reach is the lack of data typically available on the stream's geometry and flow characteristics. Previously, the USFS estimated the affected reach length assuming instantaneous mixing of the retardant over the reach; however, this approach neglects key river ...


Quantifying The Combined Effect Of Abiotic Factors On The Decomposition Of Organic Matter In Semiarid Grassland Soils, Elnazsadat Hosseiniaghdam 2021 University of Nebraska-Lincoln

Quantifying The Combined Effect Of Abiotic Factors On The Decomposition Of Organic Matter In Semiarid Grassland Soils, Elnazsadat Hosseiniaghdam

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Grassland ecosystems play a critical role in the global carbon cycle, and their cumulative carbon dioxide (CO2) emissions can be affected by animal grazing where litter (i.e., dead plant material) is trampled into the soil. However, the subsequent effects of trampling on litter decomposition are not well understood. Meanwhile, abiotic factors, especially temperature and soil moisture, are known to strongly affect litter decomposition. Due to the very small number of published studies that have considered litter placement, either litter on top of soil or litter mixed with soil as a factor in litter decomposition under different temperature and soil ...


Season Advancement Of Cool Season Cut Flower Crops Snapdragon And Peony, Maegen A. Lewis 2021 Utah State University

Season Advancement Of Cool Season Cut Flower Crops Snapdragon And Peony, Maegen A. Lewis

All Graduate Theses and Dissertations

Demand and production of specialty cut flowers is growing across the U.S., but research is lacking in the U.S. Intermountain West, where the semi-arid and high elevation climate offers unique challenges for growers. The goal of this study was to evaluate the stem quality, harvest timing, and yield of snapdragon (Antirrhinum majus) ‘Chantilly’, ‘Potomac’, and ‘Rocket’ and peony (Paeonia lactiflora) ‘Coral Charm’ as cool-season cut flower crops under high tunnel and field production in North Logan, Utah. Snapdragons were transplanted at three-week intervals beginning in early-February in high tunnels and ending in late-May in the field. Peony low-tunnel ...


Parents' Perceptions Of Life Skill Development And Satisfaction With Utah 4-H, Oakley G. Perry 2021 Utah State University

Parents' Perceptions Of Life Skill Development And Satisfaction With Utah 4-H, Oakley G. Perry

All Graduate Theses and Dissertations

The 4-H program is the nation’s largest youth development program with near six million members nationwide. Utah 4-H provides this program to the residents of Utah through Utah State University’s Extension Service. The program focuses on teaching life skills to youth to prepare them for their future using hands on educational programs tied to project areas, or particular topics like equine science or fine arts. Utah 4-H has many different stakeholders, one of which being the parents of its members. For youth programs to continue to be successful, these programs must show stakeholders their significance and ensure that ...


Automated Parsing Of Flexible Molecular Systems Using Principal Component Analysis And K-Means Clustering Techniques, Matthew J. Nwerem 2021 Chapman University

Automated Parsing Of Flexible Molecular Systems Using Principal Component Analysis And K-Means Clustering Techniques, Matthew J. Nwerem

Computational and Data Sciences (MS) Theses

Computational investigation of molecular structures and reactions of biological and pharmaceutical interests remains a grand scientific challenge due to the size and conformational flexibility of these systems. The work requires parsing and analyzing thousands of conformations in each molecular state for meaningful chemical information and subjecting the ensemble to costly quantum chemical calculations. The current status quo typically involves a manual process where the investigator must look at each conformation, separating each into structural families. This process is time-intensive and tedious, making this process infeasible in some cases, and limiting the ability of theoreticians to study these systems. However, the ...


Big Fires, Big Trees, And Big Plots: Enhancing Our Ecological Understanding Of Fire With Unprecedented Field Data, Tucker J. Furniss 2021 Utah State University

Big Fires, Big Trees, And Big Plots: Enhancing Our Ecological Understanding Of Fire With Unprecedented Field Data, Tucker J. Furniss

All Graduate Theses and Dissertations

Wildfire is an inexorable process in western landscapes, posing a major challenge to land managers: how can we use fire to restore healthy forests without jeopardizing human communities? The purpose of this dissertation is to produce research that will help guide management and support effective wildland fire use in fire-prone forests.

I utilized a longitudinal dataset from a single, large forest plot that burned under serendipitous circumstances during the 2013 Rim Fire. My research revealed that post-fire mortality models under-predict mortality of large trees, and may need to be re-calibrated to perform well under future climates. I used satellite-derived data ...


Climate-Driven Impacts Of Warming And Grazing On Sub-Arctic Coastal Wetlands In Alaska, Ryan T. Choi 2021 Utah State University

Climate-Driven Impacts Of Warming And Grazing On Sub-Arctic Coastal Wetlands In Alaska, Ryan T. Choi

All Graduate Theses and Dissertations

Climate change is rapidly warming the Arctic, especially at lower latitudes. Warmer temperatures and earlier springs are altering the timing of plants and animals, especially for long-distance migratory herbivores. Changes in the timing of both plants and herbivores have the potential to impact plant productivity and nutrient cycling, while also altering plant community diversity and composition.

In chapter 2, I conducted a field experiment to investigate how earlier growing seasons and differences in arrival times of migratory geese influence physical traits of sedge forage species. I found that both an earlier growing season and late grazing by geese had similar ...


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