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Full-Text Articles in Life Sciences

Feelings Of Connectedness To Nature: A Comparison Of Park & Recreation Management Students And Sport Management Students., N. E. Scarborough Dec 2013

Feelings Of Connectedness To Nature: A Comparison Of Park & Recreation Management Students And Sport Management Students., N. E. Scarborough

Undergraduate Honors Theses

In the face of the present consumer-based environmental movement, leaders in many industries and disciplines are striving to understand why people are “going green” in order to market to them. Researchers have been studying ways in which people connect to the environmental movement, and researchers in the field of sport and recreation are also conducting such studies. Several surveys have been developed to measure these connections; one such survey instrument is the Connectedness to Nature Scale (CNS). In the present study, the CNS was re-created online, and a link to the survey was sent via email to students studying Park ...


Identification And Characterization Of Genetic Factors Involved In Candida-Bacterial Interactions, Sean J. Fox Dec 2013

Identification And Characterization Of Genetic Factors Involved In Candida-Bacterial Interactions, Sean J. Fox

Electronic Theses and Dissertations

Throughout existence, fungi and bacteria have long shared ecological niches and thus engage in numerous interactions to mutually enhance survival or antagonistically gain competitive advantages. Of importance to human health are those interactions that involve bacteria with the opportunistic fungi, Candida albicans. An important virulence factor of C. albicans is the ability to control morphology, which allows the transition between yeast, pseudohyphal, and hyphal phenotypes. Morphological control in C. albicans is governed by quorum sensing and the secreted autoregulatory molecule farnesol. Quorum sensing allows individual cells to sense the environment and respond as a group. Bacteria also use quorum sensing ...


New Insights Into The Roles Of Human Dna Damage Checkpoint Protein Atr In The Regulation Of Nucleotide Excision Repair And Dna Damage-Induced Cell Death, Zhengke Li Dec 2013

New Insights Into The Roles Of Human Dna Damage Checkpoint Protein Atr In The Regulation Of Nucleotide Excision Repair And Dna Damage-Induced Cell Death, Zhengke Li

Electronic Theses and Dissertations

Integrity of the human genome is frequently threatened by endogenous and exogenous DNA damaging reagents that may lead to genome instability and cancer. Cells have evolved multiple mechanisms to repair DNA damage or to eliminate the damaged cells beyond repair and to prevent diverse diseases. Among these are ataxia telangiectasia and Rad3-related (ATR)-mediated DNA damage checkpoint and nucleotide excision repair (NER) that are the major pathways by which cells handle ultraviolet C (UV-C)- or other exogenous genotoxin-induced bulky DNA damage. However, it is unclear how these 2 pathways may be coordinated. In this study we show that ATR physically ...


Investigating Potential Bioactive Compounds From Rhodococcus And Their Effects On Mcf7 Breast Cancer Cells, Megan N. Crabtree Dec 2013

Investigating Potential Bioactive Compounds From Rhodococcus And Their Effects On Mcf7 Breast Cancer Cells, Megan N. Crabtree

Electronic Theses and Dissertations

Many drugs used in the treatment of various cancers are derived from or influenced by compounds from nature. The soil bacterium Rhodococcus is of interest because of its identified secondary metabolic pathways and the production of novel natural antibiotics from several strains. In this study, a solid agar extraction method was used to collect compounds from strains of Rhodococcus. These bacterial compound extracts were then tested using a MTT assay in order to evaluate their effectiveness in augmenting MCF7 breast cancer cell death. The results of two way ANOVA analyses revealed 18 compound extracts from 15 strains of Rhodococcus that ...


Mechanisms Of The Anti-Pneumococcal Function Of C-Reactive Protein, Toh B. Gang Dec 2013

Mechanisms Of The Anti-Pneumococcal Function Of C-Reactive Protein, Toh B. Gang

Electronic Theses and Dissertations

Human C-reactive protein (CRP) increases survival of and decreases bacteremia in mice infected with Streptococcus pneumoniae. Such protection of mice against pneumococcal infection is seen only when CRP is administered into mice 6 hours before to 2 hours after the injection of pneumococci, but not when CRP is given to mice at a later time. Our first aim was to define the mechanism of CRP-mediated initial protection of mice against infection. It was proposed that CRP binds to phosphocholine (PCh) moieties present in the cell wall and activates the complement system on the pneumococcal surface that kills the pathogen. We ...


Development Of In Vitro Chylomicron Assay Using Caco-2 Cells, Yuxi Sun Dec 2013

Development Of In Vitro Chylomicron Assay Using Caco-2 Cells, Yuxi Sun

Electronic Theses and Dissertations

Dietary fats are mainly transported by the intestine in lipoproteins: chylomicrons (CMs) and very low density lipoproteins (VLDLs). Unfortunately, studies of the intestinal absorption of dietary fat have been hampered by the lack of an adequate in vitro model system. As an in vitro model Caco-2 cells are able to secrete lipoproteins. We investigated the possible factors that may affect the secretion of CMs through the ultracentrifugation technique. The dose-dependent effects of oleic acid, mono-olein, egg lecithin, collagen matrix, and the effect of cell differentiation on CM secretion were then tested. We found that oleic acid, lecithin, and cell differentiation ...


An Examination Of The Inhibitory Effects Of Antibiotic Combinations On Ribosome Biosynthesis In Staphylococcus Aureus, Justin Beach Dec 2013

An Examination Of The Inhibitory Effects Of Antibiotic Combinations On Ribosome Biosynthesis In Staphylococcus Aureus, Justin Beach

Electronic Theses and Dissertations

Bacteremia initiated by Staphylococcus aureus infections can be a serious medical problem. Although a number of different antibiotics are used to combat staphylococcal infections, resistance has continued to develop. Combination therapy for certain infections has been used to reduce the emergence of resistance when a single agent has become ineffective. We hypothesize that the use of rifampicin and ciprofloxacin in combination with azithromycin, known for its inhibitory effects on the bacterial ribosome, can create potential synergistic effects resulting from indirect effects on ribosomal subunit synthesis.

To determine this we measured the effects of single and multiple antibiotics on cell growth ...


Proximity-Labeling Of Near Neighbors Of Lamin A And Lamin A-Δ50 (Progerin)., Mohammad Sabri Dec 2013

Proximity-Labeling Of Near Neighbors Of Lamin A And Lamin A-Δ50 (Progerin)., Mohammad Sabri

Undergraduate Honors Theses

In an attempt to isolate and identify proteins that differentially interact with or locate near lamin A and progerin, we used a previously described method named BioID (proximity-dependent biotin identification). This method is based on fusion of a promiscuous E. coli biotin-protein ligase (BL) to a targeting protein (in this study, lamin A-GFP and progerin-GFP). The biotin ligase biotinylates amino residues in proteins that are near-neighbors of the fusion protein. To create the fusion proteins, BL was sub-cloned from a pcDNA3.1 MCS-BirA(R118G)-HA plasmid donated by Kyle Roux from University of South Dakota. The BL fragment was ligated ...


A Glyptosaurine Lizard From The Eocene (Late Uintan) Of San Diego, California, And Implications For Glyptosaurine Evolution And Biogeography, David Moscato Aug 2013

A Glyptosaurine Lizard From The Eocene (Late Uintan) Of San Diego, California, And Implications For Glyptosaurine Evolution And Biogeography, David Moscato

Electronic Theses and Dissertations

Glyptosaurinae is an extinct subfamily of lizards of the family Anguidae. Glyptosaurine lizards are known exclusively from the Paleogene of North America and Eurasia, reaching their peak of diversity and distribution in the Eocene. In North America these lizards are largely restricted to the intermontane basins along the Rocky Mountain range, with only sparse, indeterminately-identified skeletal elements known from outside of this region. Glyptosaurine lizards are split into two tribes: the monophyletic Glyptosaurini and paraphyletic “Melanosaurini”. Within Glyptosaurini, the most common and widespread genus is Glyptosaurus. In this study I describe a new specimen assignable to G. sylvestris, notable for ...


Regulating Rsma Expression In Pseudomonas Aeruginosa, Sean D. Stacey Aug 2013

Regulating Rsma Expression In Pseudomonas Aeruginosa, Sean D. Stacey

Electronic Theses and Dissertations

Pseudomonas aeruginosa, a Gram-negative bacillus, commonly infects immunocompromised individuals and uses a variety of virulence factors to persist in these hosts. The posttranscriptional regulator, RsmA, plays a role in the expression of many virulence factors in P. aeruginosa. RsmA up regulates virulence factors used in colonizing hosts. However, regulation of rsmA is not well elucidated. Transposon mutagenesis was performed on P. aeruginosa containing a transcriptional rsmA-lacZ fusion to answer this question. Mutants were screened via β-galactosidase assay and transposon insertions identified via arbitrary PCR. A probable MFS transporter, we named mtpX, was one significant transposon mutant identified. A ΔmtpX mutant ...


Exercise Participation During Weight Loss On A High Protein – Low Carbohydrate Diet Plan In Females Aged 15-25 Years, Margaret Mobley-Meulman Aug 2013

Exercise Participation During Weight Loss On A High Protein – Low Carbohydrate Diet Plan In Females Aged 15-25 Years, Margaret Mobley-Meulman

Electronic Theses and Dissertations

Weight gain due to poor diet and lack of exercise is responsible for over 300,000 deaths each year (U.S. Department of Health and Human Services, 2010). Obese adults have an increased risk for serious health conditions including high blood pressure and cholesterol, type 2 diabetes, coronary heart disease, stroke, gallbladder disease, osteoarthritis, sleep apnea, respiratory problems, and certain cancers (National Cancer Institute, 2012). Participation in exercise can help control weight, strengthen muscles and bones, and reduce the incidence of cardiac events, stroke, hypertension, type 2 diabetes, colon and breast cancers, osteoporotic fractures, gallbladder disease, obesity, depression, anxiety, and ...


Cause And Impacts Of The Early Season Collapse Of Lilium Grayi (Gray’S Lily), On Roan Mountain, Tn/Nc, Russell J. Ingram Aug 2013

Cause And Impacts Of The Early Season Collapse Of Lilium Grayi (Gray’S Lily), On Roan Mountain, Tn/Nc, Russell J. Ingram

Electronic Theses and Dissertations

A population of the rare Southern Appalachian endemic species Lilium grayi, (Gray’s lily) Roan Mountain, TN/NC was monitored for 2 years to determine the cause and impact of an early season collapse. High concentrations of the Lilium spp. host-specific fungal phytopathogen, Pseudocercosporella inconspicua (G. Winter) U. Braun were associated with 19/20 symptomatic and 0/30 asymptomatic plants. Strength of the association between pathogen and disease and the replication of disease symptoms in 4/4 healthy hosts showed that P. inconspicua was the causal agent of the disease referred to as lily leaf spot. Disease had a severe ...


Bioengineering The Expression Of Active Recombinant Human Cathepsin G, Enteropeptidase, Neutrophil Elastase, And C-Reactive Protein In Yeast, Eliot T. Smith Aug 2013

Bioengineering The Expression Of Active Recombinant Human Cathepsin G, Enteropeptidase, Neutrophil Elastase, And C-Reactive Protein In Yeast, Eliot T. Smith

Electronic Theses and Dissertations

The yeasts Pichia pastoris and Kluyveromyces lactis were used to express several recombinant human proteins for further biochemical characterization. Two substitution variants of recombinant human enteropeptidase light chain (rhEPL) were engineered to modify the extended substrate specificity of this serine protease. Both were secreted as active enzymes in excess of 1.7 mg/L in P. pastoris fermentation broth. The substitution variant rhEPL R96Q showed significantly reduced specificities for the preferred substrate sequences DDDDK and DDDDR; however, the rhEPL Y174R variant displayed improved specificities for these substrate sequences relative to all other reported variants of this enzyme. The neutrophil serine ...


Systematics, Climate, And Ecology Of Fossil And Extant Nyssa (Nyssaceae, Cornales) And Implications Of Nyssa Grayensis Sp. Nov. From The Gray Fossil Site, Northeast Tennessee, Nathan R. Noll Aug 2013

Systematics, Climate, And Ecology Of Fossil And Extant Nyssa (Nyssaceae, Cornales) And Implications Of Nyssa Grayensis Sp. Nov. From The Gray Fossil Site, Northeast Tennessee, Nathan R. Noll

Electronic Theses and Dissertations

The Late Hemphillian (latest Miocene or earliest Pliocene, 7-4.5 Ma) Gray Fossil Site in northeastern Tennessee is interpreted to represent a lacustrine paleokarst fed by a river or stream. This research focuses on the morphological and systematic relations of Nyssa endocarps (fruit pits) from the fossil site to extinct and extant Nyssa species. A combination of metric and nonmetric traits allows recognition of a new species: Nyssa grayensis sp. nov. This fossil species shares the most similarities with the extant Nyssa ogeche Bartram ex Marshall from southeast North America and the Eocene fossil Nyssa eolignitica Berry from western Tennessee ...


Novel Roles Of Replication Protein A Phosphorylation In Cellular Response To Dna Damage, Moises A. Serrano Aug 2013

Novel Roles Of Replication Protein A Phosphorylation In Cellular Response To Dna Damage, Moises A. Serrano

Electronic Theses and Dissertations

Human replication protein A (RPA) is an eukaryotic single-stranded DNA binding protein directly involved in a variety of DNA metabolic pathways including replication, recombination, DNA damage checkpoints and signaling, as well as all DNA repair pathways. This project presents 2 novel roles of RPA in the cellular response to DNA damage. The first elucidates the regulation of RPA and p53 interaction by DNA-dependent protein kinase (DNA-PK), ataxia telangiectasia mutated (ATM) and ATM- and Rad3-related (ATR) in homologous recombination (HR). HR and nonhomologous end joining (NHEJ) are 2 distinct DNA double-stranded break (DSB) repair pathways. Here, we report that DNA-PK, the ...


Microsporidia Spore Adherence And Host Cell Infection In Vitro, Cory A. Leonard Aug 2013

Microsporidia Spore Adherence And Host Cell Infection In Vitro, Cory A. Leonard

Electronic Theses and Dissertations

Microsporidia infect invertebrate and vertebrate animals. Human pathogenic microsporidia are associated with severe disease in immunocompromised individuals, and mostly asymptomatic infection in the immunocompetent. Treatment options for microsporidiosis are limited, incompletely effective, and associated with toxicity. Furthermore, microsporidia infection of healthy individuals is poorly understood, and the consequences of asymptomatic infection have not been determined. Little is known about the molecular mechanisms of microsporidia infection, but such information is essential for the development of new therapies. Spores adhere to host cell surfaces in vitro. Our laboratory has focused on determining specific host cell and microsporidia spore surface participants in spore ...


The Relationship Of Anthropometric Measures To Vertical Jump Height., R. C. Kerns May 2013

The Relationship Of Anthropometric Measures To Vertical Jump Height., R. C. Kerns

Undergraduate Honors Theses

The capability to perform your best is an important aspect in the sport of soccer. The relationship between anthropometric measures to vertical jump height among NCAA Division I Women’s soccer players is a subject lacking sufficient scientific research. Purpose: To analyze this relationship, body mass and %body fat was correlated with un-weighted countermovement jump height to determine the strength of this relationship in NCAA DI female soccer players. Methods: Data from an ongoing athlete monitoring program from fourteen NCAA D1 female soccer players in the year 2007 was analyzed. Air Displacement Plethysmography (ADP) via a BOD POD (Life Measurement ...


Antioxidants And Wound Healing., Mary Jane Underdown May 2013

Antioxidants And Wound Healing., Mary Jane Underdown

Undergraduate Honors Theses

Neutrophils and cytokines present during an inflammatory response produce oxidants, such as reactive oxygen species (ROS) or reactive nitrogen species (RNS). These oxidants act as free radicals, a highly reactive species that steal electrons from nearby molecules to satisfy their valence electron needs. The removal of electrons by free radicals produces damage within the healthy cells of tissue. Antioxidants can be used to reduce this oxidative stress and reestablish the necessary environment for wound healing by donating electrons to the free radicals, sparing the damaging effects oxidation causes to other molecules. The standard procedure for administering supplemental antioxidants is through ...


Infectious Disease: An Agent-Based Simulation., Iqra Ahmad May 2013

Infectious Disease: An Agent-Based Simulation., Iqra Ahmad

Undergraduate Honors Theses

One of the primary reasons for studying infectious diseases is to improve control and ultimately eradicate the infection from the population (Keeling 2008). An agent base model was designed to observe the spread of disease and the effect of vaccination using the program known as StarLogo- TNG. Experiments were designed, not having a particular disease in mind, and simulations were run to determine the effects of different variables on the vaccination process of a certain population. Goals included observation of how infections spread and how vaccination plays a role in various situations such as, root of the infection, population size ...


The Relationship Of Strength (Ipf(N), Ipfkg) Compared To Running Endurance (Vo2 And Time To Exhaustion) In Recreationally Competitive Athletes., Jonathan Dale Blankenship May 2013

The Relationship Of Strength (Ipf(N), Ipfkg) Compared To Running Endurance (Vo2 And Time To Exhaustion) In Recreationally Competitive Athletes., Jonathan Dale Blankenship

Undergraduate Honors Theses

The method of training for long distance running has been to build up to the actual run distance and to keep similar volume. Although this is great for cardio it neglects the strength aspect of running. Purpose: The purpose of this research was to examine leg strength and compare it to running endurance (VO2) among male recreational runners, in order to determine any relationship. Methods: The subjects will be tested primarily on two pieces of equipment. The isometric mid-thigh clean pull apparatus which is used to measure a subject’s leg strength. The VO2 max machine will be used to ...


Discovery Of Bald Cypress Fossil Leaves At The Gray Fossil Site, Tennessee And Their Ecological Significance., Sara Brandon May 2013

Discovery Of Bald Cypress Fossil Leaves At The Gray Fossil Site, Tennessee And Their Ecological Significance., Sara Brandon

Undergraduate Honors Theses

This study focuses on fossil Taxodium leaves found at the Gray Fossil Site in northeastern Tennessee where many 7-4.5 million year old plants and animals have been recovered. Identification of the leaves is based on comparison of leaf morphology and confirmed by leaf anatomy. The ecological implications of the fossil are discussed to understand the paleoecology and paleoclimate at the Gray site. It is concluded that the fossil plant along with many other plants lived by a large sinkhole lake under a little warmer-than-today’s climate condition.


Building A Foundation For Interprofessional-Education (Ipe) Between Dietetic Students And Dental Hygiene Students At East Tennessee State University (Etsu), Monique Richard May 2013

Building A Foundation For Interprofessional-Education (Ipe) Between Dietetic Students And Dental Hygiene Students At East Tennessee State University (Etsu), Monique Richard

Electronic Theses and Dissertations

Nutrition education is an integral part of dental education as well as a variety of other healthcare professions1, but interprofessional education (IPE) between the fields of dietetics and dental hygiene is limited. The purpose of this pilot study was to define areas of opportunity to establish a foundation for the implementation of complimentary curriculum between the dietetics and dental hygiene programs at ETSU. A 76-question survey was developed and administered to dietetic interns (n=26), dental hygiene students (n=49), dietetic faculty (n=23), and dental hygiene faculty (n=19) at ETSU and Baylor College of Dentistry at Texas ...


Genetic Imbalances In Endometriosis Detected By Oligonucleotide-Array Based Comparative Genomic Hybridization, Natalie Burke May 2013

Genetic Imbalances In Endometriosis Detected By Oligonucleotide-Array Based Comparative Genomic Hybridization, Natalie Burke

Electronic Theses and Dissertations

Endometriosis is one of the most common gynecological diseases as it is thought to affect up to 15% of the female population. Characterized by the growth and proliferation of endometrial tissue outside of the uterine cavity, it is a complex condition with varying degrees of severity and can affect multiple regions of the body with symptoms ranging from a total lack of symptoms to debilitating pain and infertility. The most accepted theory of how endometriosis initiates is that of retrograde menstruation; however, approximately 90% of women with unobstructed fallopian tubes are thought to have some menstrual debris in the peritoneal ...


Assessment Of Dietary Behaviors Of College Students Participating In The Health Promotion Program Bucs: Live Well, Courtney E. Mckinney May 2013

Assessment Of Dietary Behaviors Of College Students Participating In The Health Promotion Program Bucs: Live Well, Courtney E. Mckinney

Electronic Theses and Dissertations

Rates of adult obesity in the United States continue to rise, especially among the college-age population who typically practice poor dietary choices, contributing to weight gain. College-age students experience a transitional phase called ‘emerging adulthood’ where they learn autonomy in many areas that influence long-term health status. The purpose of the online health promotion program BUCS: Live Well was to promote self-efficacy in ability to incorporate positive dietary changes, assess incidences of positive dietary habits after completing the program, and determine if weight status, residence, and health perceptions influence dietary behaviors. BUCS: Live Well was successful in assessing current dietary ...


Variations In Phenotypic Plasticity And Fluctuating Asymmetry Of Leaf Morphology Of Three Quercus (Oak) Species In Response To Environmental Factors, Joseph Kusi May 2013

Variations In Phenotypic Plasticity And Fluctuating Asymmetry Of Leaf Morphology Of Three Quercus (Oak) Species In Response To Environmental Factors, Joseph Kusi

Electronic Theses and Dissertations

Leaf morphology of Quercus (oak) species is highly variable and complicated confounded with phenotypic plasticity and fluctuating asymmetry (FA). However, the study of variation is mostly limited to leaf morphology. This study was extended to plasticity and FA variations in Q. alba (white oak), Q. palustris (pin oak), and Q. velutina (black oak). It was hypothesized that light exposure, individual trees, leaf position, and other leaf traits will influence variation in these species. Leaves were sampled from trees of these species and their morphological traits were measured. Absolute asymmetry of leaf width and area were determined and plasticity of each ...


Detection Of Bacterial Retroelements Using Genomics, Sen Mu May 2013

Detection Of Bacterial Retroelements Using Genomics, Sen Mu

Electronic Theses and Dissertations

The reverse flow of genetic information can occur when a special DNA polymerase called Reverse Transcriptase (RT) copies the genetic information in an RNA molecule back into a complementary DNA. One type of RT encoding gene found in bacteria is called a retron element. Recent bacterial genome sequencing projects have revealed many examples of retron RT genes. This gene assignment is based on comparison with a few known retron RT proteins. However, RT proteins are highly diverse in their amino acid sequences, and thus the assigned identity of these RT proteins as retrons in genome databases is questionable. One way ...


A Mathematical Model For Antibiotic Resistance In A Hospital Setting With A Varying Population, Edward H. Snyder May 2013

A Mathematical Model For Antibiotic Resistance In A Hospital Setting With A Varying Population, Edward H. Snyder

Electronic Theses and Dissertations

Antibiotic-resistant bacteria(ARB) is causing increased health risk and cost to society. Mathematical models have been developed to study the transmission of resistant bacteria and the efficacy of preventive measures to slow its spread within a hospital setting. The majority of these models have assumed a constant total hospital population with the admission and discharge rates being equal throughout the duration. But a typical hospital population varies from day to day and season to season. In this thesis, we apply variable admission and discharge daily rates to existing deterministic and stochastic models which examine the transmission of single and dual ...


Evaluation Of Colloidal Stability And Ecotoxicity Of Metal-Based Nanoparticles In The Aquatic And Terrestrial Systems, Lok R. Pokhrel May 2013

Evaluation Of Colloidal Stability And Ecotoxicity Of Metal-Based Nanoparticles In The Aquatic And Terrestrial Systems, Lok R. Pokhrel

Electronic Theses and Dissertations

Intrinsic to the many nano-enabled products are atomic-size multifunctional engineered nanomaterials, which upon release contaminate the environments, raising considerable health and safety concerns. This Ph.D. dissertation is designed to investigate (i) whether metals or oxide nanoparticles are more toxic than ions, and if MetPLATETM bioassay is applicable as a rapid nanotoxicity screening tool; (ii) how variable water chemistry (dissolved organic carbon (DOC), pH, and hardness) and organic compounds (cysteine, humic acid, and trolox) modulate colloidal stability, ion release, and aquatic toxicity of silver nanoparticles (AgNP); and (iii) the developmental responses of crop plants exposed to Ag- or ZnO- ...


Fossil Trachemys (Testudines: Emydidae) From The Late Hemphillian Of Eastern Tennessee And Its Implications For The Evolution Of The Emydidae, Steven E. Jasinski May 2013

Fossil Trachemys (Testudines: Emydidae) From The Late Hemphillian Of Eastern Tennessee And Its Implications For The Evolution Of The Emydidae, Steven E. Jasinski

Electronic Theses and Dissertations

Trachemys (Testudines: Emydidae) represents one of the most well-known turtles today. The evolution of Trachemys, while being heavily documented with various fossil representatives, is not well understood. Numerous fossils from the Gray Fossil Site in northeastern Tennessee are helping to elucidate the taxon’s evolution. The fossil Trachemys at the Gray Fossil Site represent a new species. A review of previously named Trachemys taxa reveals that a huge majority of them are not valid or have been previously misinterpreted. A phylogenetic analysis preformed on modern emydids and supposed fossil representatives of those genera also shows the evolution of a portion ...


Competition In A Simple Pond: A 3d Agent Based Model Approach., Emil W.H. Montano May 2013

Competition In A Simple Pond: A 3d Agent Based Model Approach., Emil W.H. Montano

Undergraduate Honors Theses

If two species are competing for a limited resource, the species that uses the resource more efficiently will eventually eliminate the other. This is known as the principle of competitive exclusion developed by Georgy Gause. To determine the effect of this competition, a simple three-dimensional model of a pond is created in which two species compete for a single source of energy (algae). The model is based solely on the conservation of the energy that flows through an ecosystem where primary production is the only source of energy. The first scenario tested is of two competing species with identical life ...