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Articles 1651 - 1680 of 1905
Full-Text Articles in Biology
Compositional Differences In Bacterial Communities In Fresh And Saltwater Wetlands Of The Gulf Coast, Mary Grace Bass
Compositional Differences In Bacterial Communities In Fresh And Saltwater Wetlands Of The Gulf Coast, Mary Grace Bass
Honors Theses
Wetlands are important reservoirs for biodiversity and ecosystem services such as nutrient cycling. However, the anthropogenic stressors of sea-level rise and eutrophication threaten these habitats. In this study, I examined the bacterial communities at six locations along the US Gulf Coast between Louisiana and Florida, focusing on how these communities were affected by salinity, depth, and site location. At each of six locations, five 30cm-deep soil cores were taken from a tidal fresh marsh and either a tidal brackish marsh or tidal saltmarsh. Bacterial DNA was extracted from both the surface layer and the root layer of each soil core. …
To Sleep Or Not To Sleep, That Is The Question: Sleep, Anxiety And Depressive Symptoms In Pregnancy, Alexis B. Miller
To Sleep Or Not To Sleep, That Is The Question: Sleep, Anxiety And Depressive Symptoms In Pregnancy, Alexis B. Miller
Honors Theses
Pregnancy is a time associated with many changes in a woman’s body including hormonal, metabolic, physical, and physiological changes (Miller, 2004; Okun, Kiewra, Luther, Wisniewski, & Wisner, 2011). A related concern is pregnant women and the impact of disturbed sleep. According to the Centers for Disease Control and Prevention (CDC), over 36% of the population in Mississippi experience an insufficient amount of sleep (CDC, 2014). Moreover, sleep disturbances in pregnancy are significantly associated with antenatal depressive and anxiety symptoms (Volkovich, Tikotzky, & Manber, 2015; Yu et al., 2017). The present study assessed potential relations between sleep disturbances, anxiety, depressive symptoms …
Despite Similar Perceptions And Attitudes, Postbaccalaureate Students Outperform In Introductory Biology And Chemistry Courses, Erin E. Shortlidge, Liz Rain-Griffith, Chloe Shelby, Gwen Shusterman, Jack Barbera
Despite Similar Perceptions And Attitudes, Postbaccalaureate Students Outperform In Introductory Biology And Chemistry Courses, Erin E. Shortlidge, Liz Rain-Griffith, Chloe Shelby, Gwen Shusterman, Jack Barbera
Biology Faculty Publications and Presentations
Embedding active learning is a common mechanism for meeting science, technology, engineering, and mathematics (STEM) education reform goals. Researchers have identified student benefits from such strategies, yet these benefits may not be universal for all students. We sought to identify how students at a nontraditional university perceive introductory biology and chemistry courses, and whether perceptions relate to course type, performance, or student status. We surveyed students (n = 601) using open-ended prompts regarding their perceptions of factors that impact their learning and interest, and about specific learning strategies. Generally, students did not differ in what influenced their learning or …
Autumn Roost Selection By Male Hoary Bats (Lasiurus Cinereus) In Northern California, Danielle (Skye) Salganek
Autumn Roost Selection By Male Hoary Bats (Lasiurus Cinereus) In Northern California, Danielle (Skye) Salganek
Cal Poly Humboldt theses and projects
The hoary bat, Lasiurus cinereus, is a solitary bat that roosts in the foliage of trees throughout the western hemisphere. Roosts are subject to the ambient temperature of their surroundings, thus hoary bats undergo long-distance migrations between summer and winter ranges to avoid freezing temperatures. Habitat selection has been studied during the summer for maternal female hoary bats, but not during migration and winter. Autumn migration coincides with the hoary bat mating period and it has been proposed that male and female bats may rendezvous on migration paths. Individuals may select roosts in stopover locations that enhance fitness by providing …
Dentistry: Are Stem Cells The Future?, Tova Zemel
Dentistry: Are Stem Cells The Future?, Tova Zemel
The Science Journal of the Lander College of Arts and Sciences
Stem cell research is currently advancing in every area of medicine. New information about regenerating stem cells is being uncovered on a daily basis. An area of stem cells that has not been focused on until recently is the use of dental stem cells. The objective of this paper is to elucidate the most current research about dental stem cells. Much of what is discussed in this paper has not been implemented yet, and is still in clinical trials. Dental stem cells are important because they could be an alternative way of treating caries, performing root canals, and other traumas …
Capsacin And Analgesia, Mimi Kornwasser
Capsacin And Analgesia, Mimi Kornwasser
The Science Journal of the Lander College of Arts and Sciences
Capsaicin is the active compound responsible for the pungency of hot chilli. Research has discovered its ability to desensitize peripheral nociceptive fibers which is useful in treating chronic pain disorders, specifically neuropathic pain syndromes. Capsaicin treatment comes in a variety of mediums including patches and creams and has been clinically proven to bring relief to patients with disorders such as post herpetic neuralgia, chronic regional pain syndrome and HIV related neuralgia. Exciting new forms of treatment are also in development and promise breakthroughs in the near future in this relatively young field of capsaicin-based analgesia.
The Effects Of Rf-Emf On The Child Brain, Aaron Skaist
The Effects Of Rf-Emf On The Child Brain, Aaron Skaist
The Science Journal of the Lander College of Arts and Sciences
It has long been debated whether or not cell phones have a deleterious effect on the brain. Recent studies indicate that the electro-magnetic field emitted by cell phones called RF-EMF is linked to cancer. Guidelines created to limit the exposure have not been changed since 1981 and do not consider children. The mechanism thought to cause cancer is reactive oxygen species (ROS), which cause the creation of micronuclei. RF-EMF poses a greater threat to children than adults. This is due to the major anatomical differences between the head of a child and an adult. The skull of a child is …
Car T-Cell Therapy For Acute Lymphoblastic Leukemia, Esther Langner
Car T-Cell Therapy For Acute Lymphoblastic Leukemia, Esther Langner
The Science Journal of the Lander College of Arts and Sciences
Despite all the available therapies, Acute Lymphoblastic Leukemia (ALL) remains extremely difficult to eradicate. Current available therapies, which include chemotherapy, radiation, and stem cell transplants, tend to be more successful in treating children than adults. While adults are more likely than children to relapse after treatment, the most common cause of treatment failure in children is also relapse. Improved outcomes for all ALL patients may depend upon new immunotherapies, specifically CAR T-cell therapy. CAR T-cell therapy extracts a patient’s own T-cells and modifies them with a CD19 antigen. This modification allows the new T-cells to recognize and kill cancer cells …
Full Issue: Volume 12, Number 2
Full Issue: Volume 12, Number 2
The Science Journal of the Lander College of Arts and Sciences
No abstract provided.
Triggers Of Spermatogenesis, Moses Bibi
Triggers Of Spermatogenesis, Moses Bibi
The Science Journal of the Lander College of Arts and Sciences
Of the 7% of men affected with infertility, about 54% suffer from pre-testicular and/or testicular factor induced azoospermia/ oligospermia. This agenesis of spermatozoa has been the subject of much andrology research over the past 50 years, with a particular focus in the triggers of spermatogenesis. While much of their work is limited to murine populations, researchers have put a lot of emphasis on the spermatogonial stem cell (SSC) niche as the source of the trigger(s). By following physiological patterns exhibited in the seminiferous epithelium, researchers have been able to detect distinct morphological stages that correlate with spermatogonial germ-line action. Different …
The Effects Of Aging On Skeletal Muscle Atp Production, Chaya Abboudi
The Effects Of Aging On Skeletal Muscle Atp Production, Chaya Abboudi
The Science Journal of the Lander College of Arts and Sciences
The study of the aging process and its prevention is an incredibly popular field; the natural course of the human body is to age and theories abound on how to avoid it. Age affects every system and pathway of the body and alters many of the bodily functions. This paper, using articles from Touro’s library database examines the different areas in which aging negatively affects ATP production. The multifaceted process associated with the production of ATP in the human body was analyzed. Several features such as the mitochondria, physical activity, and hormones are linked to ATP production and the relationship …
Should Subclinical Hypothyroidism Be Treated?, Rachel Kaufman
Should Subclinical Hypothyroidism Be Treated?, Rachel Kaufman
The Science Journal of the Lander College of Arts and Sciences
Subclinical Hypothyroidism, SCH, has been detected with increasing frequency in recent years and has brought about major controversies regarding management and treatment [Meier et al., 2001]. The condition is characterized as having a high concentration of thyroid stimulating hormone, yet normal thyroid hormone levels and is often asymptomatic. Scientific articles retrieved from various databases helped determine some of the long term risk factors associated with SCH, including progression to overt hypothyroidism, fatty liver disease, cardiovascular disease, neuropsychiatric complications and reproductive malfunctions. Studies determining the clinical and metabolic effects of L-thyroxine hormone replacement therapy on symptoms and potential risks of SCH …
Are There Any Viable Treatments For Age Related Macular Degeneration?, Michael Radparvar
Are There Any Viable Treatments For Age Related Macular Degeneration?, Michael Radparvar
The Science Journal of the Lander College of Arts and Sciences
Stem cells seem to offer an alternative venue for treating many cell related diseases, such as age-related macular degeneration (ARMD). ARMD is a progressive neurodegenerative medical condition, which primarily affects the retinal pigmented epithelium (RPE), resulting in degeneration of photoreceptors. Scientists have been successful in implanting stem cells into the eyes of rats. These injected cells sustained visual function and photoreceptor integrity without any cancerous cell formation. There are numerous treatments available to slow down the progression of ARMD. Depending on the type of ARMD, doctors may either recommend leading a healthier lifestyle or that one should undergo surgery. Numerous …
The Role Of Diet In Inflammatory Bowel Diseases, Aviva Smilow
The Role Of Diet In Inflammatory Bowel Diseases, Aviva Smilow
The Science Journal of the Lander College of Arts and Sciences
Inflammatory Bowel Disease encompasses two diseases, Crohn’s Disease and Ulcerative Colitis. During the last 70 years the evolving of diet in the industrialized countries has led to the utilization of foods that have been processed rather than those in their more natural original state. This increase in the processing of foods has been correlated with the more recent occurrence of metabolic diseases such as Inflammatory Bowel Disease. Patients suffering from this problem exhibit lesser amounts of anti-inflammatory bacteria such as Roseburia and Faecalibacterium and increased amounts of pro-inflammatory bacteria Escheria and Fusobacterium. Since diet directly alters the composition of the …
Developing Gold Nanoparticles-Conjugated Aflatoxin B1 Antifungal Strips, Tobiloba Sojinrin, Kangze Liu, Kan Wang, Daxiang Cui, Hugh Byrne, James Curtin, Furong Tian
Developing Gold Nanoparticles-Conjugated Aflatoxin B1 Antifungal Strips, Tobiloba Sojinrin, Kangze Liu, Kan Wang, Daxiang Cui, Hugh Byrne, James Curtin, Furong Tian
Articles
Lateral flow immunochromatographic assays are a powerful diagnostic tool for point-of-care tests, based on their simplicity, specificity, and sensitivity. In this study, a rapid and sensitive gold nanoparticle (AuNP) immunochromatographic strip is produced for detecting aflatoxin B1 (AFB1) in suspicious fungi-contaminated food samples. The 10 nm AuNPs were encompassed by bovine serum albumin (BSA) and AFB1 antibody. Thin-layer chromatography, gel electrophoresis and nuclear magnetic resonance spectroscopy were employed for analysing the chemical complexes. Various concentrations of AFB1 antigen (0–16 ng/mL) were tested with AFB1 antibody–BSA–AuNPs (conjugated AuNPs) and then analysed by scanning electron microscopy, ultraviolet–visible spectroscopy, and Zetasizer. The results …
Pathogen And Indicator Organism Inactivation And Quantification For Low-Cost Low-Tech Biosolids Treatment, Karina Eyre
Pathogen And Indicator Organism Inactivation And Quantification For Low-Cost Low-Tech Biosolids Treatment, Karina Eyre
Dissertations, Master's Theses and Master's Reports
Biosolids are a by-product of municipal wastewater treatment which, when treated to reduce pathogens, can be land applied as a fertilizer. Class A biosolids must contain low pathogen levels and are unrestricted in their use. This thesis describes methods to identify pathogen and indicator organism (PIO) inactivation mechanisms and PIO inactivation rates for use in low-cost low-tech Class A processes. Procedures to control the levels of spiked bacteria and viruses, total solids, volatile fatty acids, pH, and temperature in biosolids are described for their use in laboratory experiments. Methods for coliphage in biosolids as a surrogate for total enteric viruses …
Looking Into The Past: The Diversification Of Amphibians In The Neotropical Savannas, Ísis Da Costa Arantes
Looking Into The Past: The Diversification Of Amphibians In The Neotropical Savannas, Ísis Da Costa Arantes
Electronic Theses and Dissertations
Aim: Reveal the evolutionary processes that contributed to biotic diversification in the Cerrado savanna using amphibians as a model. Evolutionary patterns were investigated by comparing the phylogeographic and biogeographic history of biome-specific yet widely distributed amphibian species (Chiasmocleis albopunctata, Dendropsophus rubicundulus and Physalaemus nattereri). Location: Cerrado region, central South America. Methods: I sampled thousands of loci randomly distributed throughout the genomes of all three species. I applied phylogenetic, phylogeographic, demographic, and coalescent species delimitation methods to these molecular data, in combination with species distribution modeling for the past, in order to resolve questions of evolutionary history, taxonomic diversity, …
Characterization And Analysis Of Proteins Secreted By The Mutant Pichia Pastoris Strain, Bgs13, Christopher Alan Naranjo
Characterization And Analysis Of Proteins Secreted By The Mutant Pichia Pastoris Strain, Bgs13, Christopher Alan Naranjo
University of the Pacific Theses and Dissertations
The methylotrophic yeast Pichia pastoris has been utilized for heterologous protein expression for research, clinical, and industrial purposes to produce thousands of recombinant protein products. Because P. pastoris secretes very few of its own proteins, the exported recombinant protein is the major polypeptide in the extracellular medium, making purification relatively easy. Unfortunately, a disadvantage to the programmed export is that some recombinant proteins intended for secretion are retained within the cell and may be subsequently degraded. A mutant strain isolated in our lab, containing a pREMI-derived disruption of the BGS13 gene, has displayed elevated levels of secretion for a variety …
Cultivation In Long-Term Simulated Microgravity Is Detrimental To Biofilm Formation Ability And Pyocyanin Production Of Pseudomonas Aeruginosa Pa14 Wild Type, Δflgk, And Δpela, Linda M. Vu , '19
Senior Theses, Projects, and Awards
Pseudomonas aeruginosa can attach to surfaces and form aggregates known as biofilms. It has been previously found that P. aeruginosa cultivated in space form thicker and structurally different biofilms than those grown in Earth gravity. The purpose of our study was to investigate how microgravity, simulated in a laboratory setting, would influence the biofilm formation abilities of P. aeruginosa PA14 wild type strain as well as mutants ΔflgK and ΔpelA. While ΔflgK is defective in the initialization of biofilm formation, ΔpelA is hindered in biofilm growth and maintenance. The bacteria were cultivated in a High …
Protein Engineering Approaches For Antibody Fragments: Directed Evolution And Rational Design Approaches, Merve Arslan, Di̇lara Karadağ, Si̇bel Kalyoncu
Protein Engineering Approaches For Antibody Fragments: Directed Evolution And Rational Design Approaches, Merve Arslan, Di̇lara Karadağ, Si̇bel Kalyoncu
Turkish Journal of Biology
The number of therapeutic antibodies in preclinical, clinical, or approved phases has been increasing exponentially, mostly due to their known successes. Development of antibody engineering methods has substantially hastened the development of therapeutic antibodies. A variety of protein engineering techniques can be applied to antibodies to improve their affinity and/or biophysical properties such as solubility and stability. Antibody fragments (where all or some parts of constant regions are eliminated while the essential antigen binding region is preserved) are more suitable for protein engineering techniques because there are many in vitro screening technologies available for antibody fragments but not full-length antibodies. …
Prediction And Expression Analysis Of G Protein-Coupled Receptors In The Laboratory Stick Insect, Carausius Morosus, Burçi̇n Duan Şahbaz, Necla Bi̇rgül İyi̇son
Prediction And Expression Analysis Of G Protein-Coupled Receptors In The Laboratory Stick Insect, Carausius Morosus, Burçi̇n Duan Şahbaz, Necla Bi̇rgül İyi̇son
Turkish Journal of Biology
G protein-coupled receptors (GPCRs) are 7-transmembrane proteins that transduce various extracellular signals into intracellular pathways. They are the major target of neuropeptides, which regulate the development, feeding behavior, mating behavior, circadian rhythm, and many other physiological functions of insects. In the present study, we performed RNA sequencing and de novo transcriptome assembly to uncover the GPCRs expressed in the stick insect Carausius morosus. The transcript assemblies were predicted for the presence of 7-transmembrane GPCR domains. As a result, 430 putative GPCR transcripts were obtained and 43 of these revealed full-length sequences with highly significant similarity to known GPCR sequences in …
Establishment Of Human Trabecular Meshwork Cell Cultures Usingnontransplantable Corneoscleral Rims, Kosala Dinuka Waduthanthri, Carlo Montemagno, Si̇bel Çeti̇nel
Establishment Of Human Trabecular Meshwork Cell Cultures Usingnontransplantable Corneoscleral Rims, Kosala Dinuka Waduthanthri, Carlo Montemagno, Si̇bel Çeti̇nel
Turkish Journal of Biology
Human trabecular meshwork (hTM) cell isolation in academic settings utilizes the motile nature of these cells, allowing them to migrate away from the explant and proliferate on distal regions of the culture substrate. Corneoscleral rims used for transplantation are a potential source of explants for the establishment of hTM cell cultures. However, cell isolation and the initiation of primary cell cultures from ocular tissues stored in Optisol-GS medium for an extended period of time (>6 days) has proven difficult, since Optisol-GS remarkably reduces cell viability and cellularity. Therefore, explants obtained from ocular tissues stored in Optisol-GS do not often …
Systematic Analysis Of The Frequently Amplified 2p15-P16.1 Locus Reveals Papolg As A Potential Proto-Oncogene In Follicular And Transformed Follicular Lymphoma, Deni̇z Kurşun, Can Küçük
Systematic Analysis Of The Frequently Amplified 2p15-P16.1 Locus Reveals Papolg As A Potential Proto-Oncogene In Follicular And Transformed Follicular Lymphoma, Deni̇z Kurşun, Can Küçük
Turkish Journal of Biology
Transformed follicular lymphoma (tFL) originates from histological transformation of follicular lymphoma (FL), which is the most common indolent non-Hodgkin lymphoma. High-resolution genomic copy-number analysis previously identified frequent amplification of the 2p15-p16.1 locus in FL and tFL cases. The genes (i.e. BCL11A, PAPOLG, PUS10, and USP34) in this amplified locus have not been systematically investigated to date in terms of their role in FL pathogenesis or transformation to tFL. Here we investigated the relationship between amplification and expression of genes in 2p15-p16.1 as well as their expression after histological transformation. NCBI GEO SNP array and gene expression profile (GEP) data of …
Overexpression Of A Fusion Defensin Gene From Radish And Fenugreek Improves Resistance Against Leaf Spot Diseases Caused By Cercospora Arachidicola And Phaeoisariopsis Personata In Peanut, Madhu Bala, Thankappan Radhakrishnan, Abhay Kumar, Gyan Prakash Mishra, Jentilal Ramjibhai Dobraia, Pulugurtha Bharadwaja Kirti
Overexpression Of A Fusion Defensin Gene From Radish And Fenugreek Improves Resistance Against Leaf Spot Diseases Caused By Cercospora Arachidicola And Phaeoisariopsis Personata In Peanut, Madhu Bala, Thankappan Radhakrishnan, Abhay Kumar, Gyan Prakash Mishra, Jentilal Ramjibhai Dobraia, Pulugurtha Bharadwaja Kirti
Turkish Journal of Biology
No abstract provided.
E2f6 Is Essential For Cell Viability In Breast Cancer Cells During Replication Stress, Inam Lafta
E2f6 Is Essential For Cell Viability In Breast Cancer Cells During Replication Stress, Inam Lafta
Turkish Journal of Biology
E2F6 is a member of the E2F family of transcription factors involved in regulation of a wide variety of genes through both activation and repression. E2F6 has been reported as overexpressed in breast cancers but whether or not this is important for tumor development is unclear. We first checked E2F6 expression in tumor cDNAs and the protein level in a range of breast cancer cell lines. RNA interference-mediated depletion was then used to assess the importance of E2F6 expression in cell lines with regard to cell cycle profile using fluorescence-activated cell sorting and a cell survival assay using (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide …
Proteomic And Physiological Responses In Mangrove Kandelia Candel Roots Under Short-Term High-Salinity Stress, Jianhong Xing, Dezhuo Pan, Lingxia Wang, Fanglin Tan, Wei Chen
Proteomic And Physiological Responses In Mangrove Kandelia Candel Roots Under Short-Term High-Salinity Stress, Jianhong Xing, Dezhuo Pan, Lingxia Wang, Fanglin Tan, Wei Chen
Turkish Journal of Biology
Kandelia candel is one of the mangrove species that are most resistant to environmental stress. As a typical nonsalt-secreting mangrove plant, K. candel is an ideal biological material to analyze the molecular mechanism of salt tolerance in woody plants. In this study, changes in protein abundance and expression profile in K. candel roots under high-salinity stress of 600 mmol L-1 NaCl were analyzed using isobaric tags for relative and absolute quantification (iTRAQ) assay. Moreover, the physiological parameters associated with metabolic pathways in which the differentially abundant proteins (DAPs) are involved were determined. A total of 5577 proteins were identified by …
Identification Of Streptomyces Strains Isolated From Humulus Lupulus Rhizosphere And Determination Of Plant Growth Promotion Potential Of Selected Strains, Fadi̇me Özdemi̇r Koçak
Identification Of Streptomyces Strains Isolated From Humulus Lupulus Rhizosphere And Determination Of Plant Growth Promotion Potential Of Selected Strains, Fadi̇me Özdemi̇r Koçak
Turkish Journal of Biology
In the present study it was aimed to obtain novel strains of actinomycetes that have the ability to promote plant growth. For this, seven soil samples from the rhizosphere of Humulus lupulus (Pazaryeri, Bilecik) were used and potential isolates were obtained. 16S rRNA genes of 30 isolates were amplified by PCR and sequenced. Eighteen isolates were found to be closely related to Streptomycetes spp. and they were tested for their proteolytic activity, cellulase activity, phosphate solubility, IAA production, biofilm formation, and growth in nitrogen-limited medium. Two isolates, HCI 12 and HCI 36, were selected according to the results of these …
The Effects Hot Water Kill Time Has On Dna Degradation And Str Profiling From Lucilia Sericata (Diptera: Calliphoridae) Crop Contents, Nicholas Alexander Haas
The Effects Hot Water Kill Time Has On Dna Degradation And Str Profiling From Lucilia Sericata (Diptera: Calliphoridae) Crop Contents, Nicholas Alexander Haas
Graduate Theses, Dissertations, and Problem Reports (ETD)
he use of entomological specimens as a source of forensic DNA evidence has been studied since the late 20th century. Currently as it stands, to preserve both the minimum postmortem interval (mPMI) and DNA evidence within fly larvae, two standards of preservation exist. For mPMI, the use of hot water kill with near-boiling water is used to fix larvae size for accurate age estimation. For DNA evidence, the standard technique of preservation is submersion in 70% ethanol. To help reduce the number of standard preservation techniques for practitioners, this study assessed the feasibility of the hot water kill preservation technique …
Comparing The Effects Of Swimming Exercise And Dissolved Oxygen On Important Performance Parameters Of Early-Rearing Atlantic Salmon Salmo Salar And Rainbow Trout Oncorhynchus Mykiss., Thomas B. Waldrop
Graduate Theses, Dissertations, and Problem Reports (ETD)
Swimming exercise (bodylenghts/sec), and dissolved oxygen (DO), are important environmental variables in aquaculture. While there is an obvious physiological association between these two parameters, their interaction has not been adequately studied in Atlantic salmon, Salmo salar and Rainbow trout, Oncorhynchus mykiss. Since both variables can be easily manipulated in modern aquaculture systems, we sought to assess the impact of these parameters, alone and in combination, on the performance, health, and welfare parameters of the two species. Atlantic salmon and Rainbow trout were stocked into twelve circular 0.5 m3 tanks and exposed to either high (1.5-2 BL/s) or low …
Influence Of Climate Change And Prescribed Fire On Habitat Suitability And Abundance Of The High-Elevation Endemic Cow Knob Salamander (Plethodon Punctatus), Carl David Jacobsen
Influence Of Climate Change And Prescribed Fire On Habitat Suitability And Abundance Of The High-Elevation Endemic Cow Knob Salamander (Plethodon Punctatus), Carl David Jacobsen
Graduate Theses, Dissertations, and Problem Reports (ETD)
Amphibians are facing global declines due to climate change, loss and degradation of habitat, invasive species, and disease. The Appalachian region of the eastern USA is a global biodiversity hotspot for salamanders, which are considered keystone species that influence nutrient dynamics in terrestrial and aquatic food webs. There are high rates of salamander endemism in the Appalachian region, with many species restricted to isolated, high elevation areas. The Cow Knob Salamander (Plethodon punctatus) is one such species. It is only found at elevations >675 m (most populations are above 900 m) on Shenandoah Mountain, North Mountain, and Nathaniel …