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2015

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Coyotes On The Web: Understanding Human-Coyote Interaction And Online Education Using Citizen Science, Zuriel Anne Rasmussen Dec 2015

Coyotes On The Web: Understanding Human-Coyote Interaction And Online Education Using Citizen Science, Zuriel Anne Rasmussen

Dissertations and Theses

Coyote (Canis latrans) numbers are increasing in urban areas, leading to more frequent human-coyote interactions. Rarely, and particularly when coyotes have become habituated to humans, conflicts occur. Effective education about urban coyotes and how to prevent habituation reduces conflict. Citizen science, in the form of online education, can be used to engage and educate city dwellers about urban coyotes. In this research, I explore Portland Metropolitan Area (PMA) residents' baseline experiences with, and attitudes toward, urban coyotes. Next, I investigate citizen science as a tool for education. Using the Portland Urban Coyote Project (PUCP), a citizen science project, as a …

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Effect Of Crude Protein Levels And Metaphylaxis On Health, Growth, And Performance Of Newly Received Stocker Calves And Subsequent Feedlot And Carcass Performance, Tyler John Braud Dec 2015

Effect Of Crude Protein Levels And Metaphylaxis On Health, Growth, And Performance Of Newly Received Stocker Calves And Subsequent Feedlot And Carcass Performance, Tyler John Braud

Theses and Dissertations

The objectives of this study were to evaluate the effects of: (1) metaphylactic antibiotic administration (none or Excede on arrival); and (2) receiving diet crude protein levels (17.1 % or 11.9 % CP) on respiratory disease incidence, mortality, and growth performance of beef calves received into a stocker system as well as the influence of stocker treatment on feedlot and carcass performance. For the stocker phase, steers (n = 244) were stratified by BW and randomly assigned to 20 pens. Treatments were randomly assigned in a 2 x 2 factorial study design. At the conclusion of the stocker phase, 76 …

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Student Self-Regulated Learning Through Use Of The Linguafolio® Online In A Beginning Middle School El Class, Melissa Rose Davey Dec 2015

Student Self-Regulated Learning Through Use Of The Linguafolio® Online In A Beginning Middle School El Class, Melissa Rose Davey

School of Education and Leadership Student Capstone Theses and Dissertations

This qualitative mixed methods case study explores how LinguaFolio® Online is an appropriate strategy for increasing self-regulated learning in a beginning ESL class. Five participants in a middle school beginning ESL class used LinguaFolio® Online over eight weeks in order to report on learning and submit evidence exemplars. All participants used LinguaFolio® Online for various user interactions concerning self-regulation and self-assessment. Participants completed a pre- and post-survey so that perceptions could be compared before and after use of LinguaFolio® Online. The results of this study specify two important trends; first, regular use of the selfassessment lists contained within LinguaFolio® Online …

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The Development Of A Model For Vascular Calcification And The Effects Of Magnesium Supplementation On In Vitro Calcification, Joshua Nathaniel Grant Dec 2015

The Development Of A Model For Vascular Calcification And The Effects Of Magnesium Supplementation On In Vitro Calcification, Joshua Nathaniel Grant

Theses and Dissertations

Cardiovascular disease is most deadly medical condition in the United States. Medial vascular calcification is a disease that often precedes other more serious cardiovascular diseases that have high mortality. In order to research new therapies for the treatment of medial vascular calcification, an in vitro cell culture model must be developed that mimics the process in vivo. This disease is shown to be an active, cell-mediated process where the vascular smooth muscle cells (VSMCs) in the arteries are differentiating into osteoblast-like cells and depositing hydroxyapatite mineral in the artery walls. By administering inorganic phosphate to cell culture medium, an osteogenic …

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Fall Commencement Ceremonies, University Of North Florida Dec 2015

Fall Commencement Ceremonies, University Of North Florida

Commencement Printed Materials

Program for the Fall Commencement ceremonies.

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Biodiversity And The Role Of Bioturbating Invertebrates In Nutrient Cycling In Stormwater Ponds, Kerry Lee Kuntz Dec 2015

Biodiversity And The Role Of Bioturbating Invertebrates In Nutrient Cycling In Stormwater Ponds, Kerry Lee Kuntz

Theses

Stormwater retention ponds are typically constructed to manage stormwater in commercial and residential areas, thereby reducing flooding and erosion and improving downstream water quality. Although auxiliary ecosystem services of stormwater ponds are less often recognized, these small aquatic ecosystems may also serve as habitat for aquatic flora and fauna and can be hotspots for biogeochemical cycling. This study examined the biological communities and physicochemical environment of 9 stormwater ponds in Rochester, New York, USA to assess their role in supporting biodiversity and facilitating carbon and nutrient cycling in developed landscapes. A field study revealed that pond age and vegetation cover …

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The Middle Stone Age On The Margins: Chronological And Archaeological Contexts For Hominin Behavioral Evolution In The Middle And Late Pleistocene Of East Africa., Nicholas T. Blegen Dec 2015

The Middle Stone Age On The Margins: Chronological And Archaeological Contexts For Hominin Behavioral Evolution In The Middle And Late Pleistocene Of East Africa., Nicholas T. Blegen

Doctoral Dissertations

The later Middle through early Late Pleistocene (~100–400 ka) of East Africa is an important time and place for the evolution of our species. This period records the first appearance of Homo sapiens and spans significant technological changes including the decline of large handheld stone tools characteristic of the Acheulean, the development of stone tool technologies collectively known as the Middle Stone Age (MSA). These include diverse Levallois prepared core techniques and the manufacture and use of pointed weapons. It is in association with MSA technologies in sub-Saharan Africa that most of the behaviors characteristic of modern humans first appear. …

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Application Of Proteomics In Understanding Pale Soft And Exudative Condition In Broiler Breast Meat, Monil Ajitbhai Desai Dec 2015

Application Of Proteomics In Understanding Pale Soft And Exudative Condition In Broiler Breast Meat, Monil Ajitbhai Desai

Theses and Dissertations

This experiment was conducted to determine the differences in meat quality (cooking loss and shear force), descriptive sensory characteristics, consumer acceptance, and whole muscle proteomes between normal and Pale, Soft, and Exudative (PSE) broiler breast meat. Male Hubbard × Cobb 500 birds (n = 1,050) were raised in commercial houses. Prior to harvest, a sample of the broilers (n = 900) were subjected to short-term stress (38 °C for 2 h), and the remaining broilers (n = 150) were maintained at control conditions (21 °C for 2 h). From the stressed and control condition broilers, breast samples were characterized by …

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Direct Digital Engagement Of Patients And Democratizing Health Care, Dov Greenbaum Dec 2015

Direct Digital Engagement Of Patients And Democratizing Health Care, Dov Greenbaum

Santa Clara High Technology Law Journal

Direct Digital Engagement of Patients and Democratizing Health Care

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Longevity Of Mineral Supplements Within The Soil And Associated Use By White-Tailed Deer, Brian C. Peterson, Keith D. Koupal, Andrew K. Schissel, Cody M. Siegel Dec 2015

Longevity Of Mineral Supplements Within The Soil And Associated Use By White-Tailed Deer, Brian C. Peterson, Keith D. Koupal, Andrew K. Schissel, Cody M. Siegel

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Humans have baited wildlife such as white-tailed deer (Odocoileus virginianus) for generations with the primary purpose of increasing hunting harvest success. Baiting regulation changes are often considered by state management agencies as they pertain to hunting opportunity, fair chase, and disease risk. Cervids require a variety of minerals to supplement biological processes, especially sodium (Na), calcium (Ca), and phosphorus (P). We developed artificial mineral supplement sites set in front of trail cameras to monitor deer use. Pooled soil samples were collected at mineral sites and compared to the surrounding area to determine the longevity of elevated minerals levels …

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Characterization Of The Ability Of Yeast Probiotics And Paraprobiotics To Directly Interact With Gram-Positive And Gram-Negative Bacteria, Gabriel Alviola Posadas Dec 2015

Characterization Of The Ability Of Yeast Probiotics And Paraprobiotics To Directly Interact With Gram-Positive And Gram-Negative Bacteria, Gabriel Alviola Posadas

Theses and Dissertations

Yeast probiotics and paraprobiotics, live and inactivated yeast cells, respectively, improve health and performance of livestock by stabilizing the intestinal microbial community. They have also been used for infection prevention and treatment. Despite much research already conducted, the mechanism of direct antagonism, or adhesion of bacteria to the probiotic/paraprobiotic, is under characterized. Additionally, it is unknown which probiotic/paraprobiotic is optimal to use for specific infections. The interactions between the yeast and certain pathogens were analyzed qualitatively with scanning electron microscopy (SEM) and quantitatively with membrane filtration assays. Gram-positive bacteria were found to exhibit specificity under SEM. Through membrane filtration, Listeria …

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Conserving The Mississippi Gopher Frog (Lithobates Sevosa) Through The Use Of Assisted Reproductive Technologies, Katherine Michelle Graham Dec 2015

Conserving The Mississippi Gopher Frog (Lithobates Sevosa) Through The Use Of Assisted Reproductive Technologies, Katherine Michelle Graham

Theses and Dissertations

The Mississippi gopher frog (MGF, Lithobates sevosa) is a critically endangered amphibian which requires the use of assisted reproductive technologies (ART) to successfully reproduce in captivity. Several challenges to successfully breeding MGFs were investigated to improve reproduction in this species. Accurate identification of biological sex is a necessary first step to reproducing species, thus several non-invasive techniques for sex identification were compared in the weakly dimorphic MGF. Reliably obtaining eggs from female MGFs has also proved difficult, therefore, four exogenous hormone therapies were compared for their success to induce ovulation. Ultrasound imaging was used alongside hormone treatments to improve understanding …

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A Role Of Dispersed Phase Carbon-Length And Small Amphipathic Coemulsifier In Bovine Serum Albumin Stabilized Nanoemulsions Designed To Deliver Bleaching Agent To Decolorized Fresh Whey, Jingyi Yan Dec 2015

A Role Of Dispersed Phase Carbon-Length And Small Amphipathic Coemulsifier In Bovine Serum Albumin Stabilized Nanoemulsions Designed To Deliver Bleaching Agent To Decolorized Fresh Whey, Jingyi Yan

Theses and Dissertations

Benzoyl peroxide (BP), used to bleach annatto in cheese whey, was encapsulated within the hydrophobic dispersed phase (phi) of nanoemulsions (NEs) to minimize its degradation and extend its efficacy to minimized usage levels. Three purified, saturated short-chain fatty acids of varying chain lengths: butyric (C4), hexanoic (C6) and octanoic (C8) acid, were chosen as the phi to completely dissolve various concentrations of BP. Stabilization was achieved with different concentrations and combinations of primary emulsifier (E), bovine serum albumin, and coemulsifier (CE), Tween 20. Different ultra-high pressures (UHP) were used to generate a stable NE. The best result was made by …

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Evaluation Of Initial Body Weight And Supplementation Levels On Health And Performance Of Newly Received Stocker Calves, William Corey Wilkins Dec 2015

Evaluation Of Initial Body Weight And Supplementation Levels On Health And Performance Of Newly Received Stocker Calves, William Corey Wilkins

Theses and Dissertations

These study objectives were to evaluate the effects of: initial bodyweight, energy supplementation, distance and days traveled and hair coat shedding on performance and health. Crossbred heifers (n=120) were purchased as either lightweight (136 kg) or heavyweight (226 kg) calves. Factors affecting morbidity and growth were tested using Poisson or linear regression (PROC GLIMMIX), with a correlation structure defining clustering by pen. Incidence density was 53.7/103 calf-days and 19.0/103 calf-days for light and heavy initial BW, respectively. Lightweight calves were 2.8 times more likely to be treated for BRD (p=0.02) and each increase in hair shed score increased risk for …

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Examination Of The Effects Of Vitamin D Supplementation On The In Vitro Calcification Of Vascular Smooth Muscle Cells, Kevin Andrew Bennett Dec 2015

Examination Of The Effects Of Vitamin D Supplementation On The In Vitro Calcification Of Vascular Smooth Muscle Cells, Kevin Andrew Bennett

Theses and Dissertations

Medial calcification refers to mineral deposition in the middle layer of arteries. This mineralization is common in chronic kidney disease patients and causes an increased chance of cardiovascular complications. Calcitriol, the active form of vitamin D, is often administered to these patients to treat an associated condition, secondary hyperparathyroidism. Unfortunately, calcitriol treatment may promote vascular calcification due to increasing serum calcium and phosphate. We examined the effects of calcitriol supplementation on vascular smooth muscle cell (VSMC) calcification, through atomic absorption, scanning electron microscopy, and western blot analysis. Additionally, we examined the effects of the combinations of calcitriol, fibroblast growth factor …

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Examining The Relationships Between Violent Media Programming, Aggression And Prosocial Behaviors Among Black College Students, Jamie Michelle Williams Dec 2015

Examining The Relationships Between Violent Media Programming, Aggression And Prosocial Behaviors Among Black College Students, Jamie Michelle Williams

Theses and Dissertations

The purpose of this study was to examine the relationship between violent media programming, aggression and prosocial behaviors among Black college students. The study included 108 Black college students from a historically Black college/university on the East Coast. The researcher evaluated the participants’ aggression using Buss & Warren’s (2000) Aggression Questionnaire and evaluated the participants’ prosocial behaviors using Penner’s (1995) prosocial personality battery. The researcher then used an independent samples t-test to analyze the data and test the hypothesis that a relationship between the variables exists. Furthermore, the researcher employed discriminant analysis to determine if group membership could be predicted, …

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K Calibration For Corn And Soybean At -3 And -1/3 Bar Soil Moisture Levels (A Case Study Of Some Malawi Soils), Julia Nyembezi Qoto Dec 2015

K Calibration For Corn And Soybean At -3 And -1/3 Bar Soil Moisture Levels (A Case Study Of Some Malawi Soils), Julia Nyembezi Qoto

Theses and Dissertations

A greenhouse pot study was conducted on three soils with varying clay contents to establish K critical value at -3 and -1/3 bar soil moisture levels. Four K fertilizer treatments (0, 0.07, 0.14, and 0.3 g/pot) replicated three times were arranged in a complete randomized block design. The Cate-Nelson graphical procedure revealed that K critical values for corn and soybeans were not equal at the two designated moisture levels. The corresponding percentage yield however was higher at -1/3 bars for corn and at -3 bars for soybean. Statistical regression analysis showed that there was a minor response in plant tissue …

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Feed Quality Effects On Modern Heavy Broiler Performance, Robert Benjamin Sellers Dec 2015

Feed Quality Effects On Modern Heavy Broiler Performance, Robert Benjamin Sellers

Theses and Dissertations

Commercial broilers are fed exclusively pelleted diets; this is due to research that has demonstrated numerous benefits to feeding pellets. The first objective was to investigate the effects of modest improvements in pellet quality on two modern broiler strains. Regardless of strain, feeding 80% pellets improved broiler performance from d 28 to 42. The second objective was to investigate the effects of feed form and liquid application method on feed augering segregation and subsequent broiler performance. In general, percent pellets steadily decreased across location throughout feed augering. Also, phytase segregation occurred throughout augering and was exacerbated in post-pellet liquid application …

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Selection Dynamics In Heliconius Hybrid Zones And The Origin Of Adaptive Variation, Steven Grant Shaak Dec 2015

Selection Dynamics In Heliconius Hybrid Zones And The Origin Of Adaptive Variation, Steven Grant Shaak

Theses and Dissertations

There is repeated evidence that hybridization is a major contributor to the production of adaptive diversity; however, the evolutionary fate of hybrids in natural populations remains poorly understood. In Heliconius butterflies, hybridization is common and responsible for generating a variety of warning color patterns across the genus. Predator avoidance of warning colorations appears to largely be learned, which drives strong positive frequency-dependent selection. This creates a paradox for hybrid lineages: how do novel hybrid forms manage to establish and persist under such strong selection? In this dissertation, I present a series of studies centered on the selection dynamics of Heliconius …

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Subspecies Composition, Genetic Variation And Structure Of Largemouth Bass In Puerto Rico Reservoirs, Nick Ryan Peterson Dec 2015

Subspecies Composition, Genetic Variation And Structure Of Largemouth Bass In Puerto Rico Reservoirs, Nick Ryan Peterson

Theses and Dissertations

Subspecies composition and genetic variation are important to the growth and survival of Largemouth Bass and information on these genetic characteristics is required for proper management of the species. In Puerto Rico, a genetic evaluation is needed to develop management plans for Puerto Rico reservoirs and maintain Florida Largemouth Bass at the Maricao Hatchery. Subspecies composition was characterized among reservoirs and the contemporary Maricao Hatchery broodstock in Puerto Rico, and metrics were compared between subspecies and hybrids among reservoir populations. Genetic variation and structure was determined and compared to Largemouth Bass populations in their native range. Florida subspecies were prevalent …

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Reproductive Biology Of The Female Bottlenose Dolphin (Tursiops Truncatus), Holley Stone Muraco Dec 2015

Reproductive Biology Of The Female Bottlenose Dolphin (Tursiops Truncatus), Holley Stone Muraco

Theses and Dissertations

The goal of this long-term study was to better understand the reproductive biology of the female bottlenose dolphin (Tursiops truncatus) and provide a hypothesis for how dolphins may communicate reproductive readiness to one another. Utilizing conditioned dolphins in aquaria, this dissertation examined several previously unknown aspects of dolphin reproduction, including ovarian follicular dynamics during the luteinizing hormone surge, urinary prolactin levels, estrus behavior, vaginal fluid arboriform arrangement, in-situ vaginal and cervical anatomy during estrus, reversed-phase high-performance liquid chromatography (RP-HPLC) of urine samples to identify proteins and peptides that may be used in chemical communication, and a review and anatomical analysis …

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Promoting The Interest Of African American Teenage Girls In Science: What Can We Learn From An Exemplary African American Science Teacher?, Cynthia Stewart Mcmath Dec 2015

Promoting The Interest Of African American Teenage Girls In Science: What Can We Learn From An Exemplary African American Science Teacher?, Cynthia Stewart Mcmath

Theses and Dissertations

This study focused on science teaching that promoted the interest of African American teenage girls in the science classroom of an exemplary African American science teacher. It focused on, observed and examined the planning, teaching and learning strategies used by the science teacher. It also described what the science teacher experienced during her high school years, during college, during her teaching career. The case study approach/method was used for this research to capture the description and examination of the practices of the science teacher. This research described how an African American female science teacher serves as a role model and …

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Identification Of Purpurogallin In Brewed Beverages And Effect Of Roasting On Antioxidant Activity And Phenolic Compounds In Coffees, Yu-Chen Liao Dec 2015

Identification Of Purpurogallin In Brewed Beverages And Effect Of Roasting On Antioxidant Activity And Phenolic Compounds In Coffees, Yu-Chen Liao

Theses and Dissertations

Coffee contains many antioxidants including purpurogallin, which is a hydrophobic phenolic antioxidant that is difficult to measure with reported methods. A method combining solid-phase extraction and liquid chromatography–mass spectrometry was developed to detect and quantify purpurogallin in brewed beverages, including coffee. For beverage preparation, water extraction was adopted for improved correlation with moka pot brewing. Purpurogallin was detected in all commercial coffee samples, and its content in ground coffees ranged from 455-630 ng/g dry weight. Purpurogallin was only detected in two English breakfast tea samples (335-360 ng/g dry weight) and was not detected in any cocoa sample. Antioxidant activity, total …

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Impact Of Corn Earworm On Field Corn Yield And Grain Quality, Jenny Lee Bibb Dec 2015

Impact Of Corn Earworm On Field Corn Yield And Grain Quality, Jenny Lee Bibb

Theses and Dissertations

Field corn, Zea mays L., has been introduced to the market with pyramided Bacillus thuringiensis (Bt) corn technologies. These technologies reduce kernel damage from ear feeding caterpillar pests, including corn earworm, Helicoverpa zea (Boddie). The first generation Bt traits in field corn demonstrated limited activity on corn earworm feeding on grain in ears. The pyramided corn technologies have greater cumulative protein concentrations and improved expression throughout the plant, so these corn traits should provide an effective management tool against these pests. In addition, reduced kernel injury may also have a direct effect on physical grain quality. The results for this …

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Impact Of Irrigation Applications At Soil Moisture Deficits On Plant Development And Yield Of Indeterminate And Determinate Soybean Varieties, Andy J. Brown Dec 2015

Impact Of Irrigation Applications At Soil Moisture Deficits On Plant Development And Yield Of Indeterminate And Determinate Soybean Varieties, Andy J. Brown

Theses and Dissertations

As the Mississippi River Alluvial Aquifer declines, it is the duty of soybean producers to become more efficient irrigators. Research was established in 2012 and 2013 in the Mississippi Delta to evaluate plant development and yield of an indeterminate soybean variety with irrigation initiated at the R1 producer standard and compared to initiation timings at the R2, R4, and R5 growth stages once a 2” deficit was reached according to the FAO-56 Penman-Monteith model. Research was also conducted to evaluate seeding rates in irrigated and non-irrigated systems in Starkville and Stoneville, MS in 2013 and 2014. These data indicate that …

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Influence Of Market Setting And Time Of Purchase On Counts Of Aerobic Bacteria, Escherichia Coli, And Coliform And Prevalence Of Salmonella And Listeria In Beef, Pork, And Chicken In Vietnam, April Kathleen Mccain Dec 2015

Influence Of Market Setting And Time Of Purchase On Counts Of Aerobic Bacteria, Escherichia Coli, And Coliform And Prevalence Of Salmonella And Listeria In Beef, Pork, And Chicken In Vietnam, April Kathleen Mccain

Theses and Dissertations

The objective of this study was to determine the influence of market type and sampling time on Salmonella and Listeria prevalence and microbiological quality of 540 beef, pork, and whole chicken samples collected in 6 supermarkets (SM), 6 indoor markets (IM), and 6 open markets (OM) at opening (T0) and 4 h after the opening (T4) in Vietnam. Salmonella and Listeria prevalence ranged from 30.4 to 71.0% and 56.6 to 99.9 %, respectively, in beef, pork, and chicken in Vietnam. Aerobic bacteria counts ranged from 10.5 to 11.6 log CFU/g, whereas, E. coli and coliform counts ranged from 7.2 to …

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The Effects Of Stress On Physiology And Meat Quality In Cultured Channel Catfish, Mike Ciaramella Dec 2015

The Effects Of Stress On Physiology And Meat Quality In Cultured Channel Catfish, Mike Ciaramella

Theses and Dissertations

Stress during fish culture can impact growth, physiology and fillet quality. Maintenance of high quality seafood is important to ensure the production of a highly marketable product. The present study assessed how sequential stressors affect the physical, physiological, sensory and quality characteristics of channel catfish (Ictalurus punctatus) fillets. Temperature (25°C or 33°C) and dissolved oxygen (DO, ~2 mg/L or >5 mg/L) were maintained for four weeks, followed by socking and transport stress for a total of 12 treatments. After each stage of stress (environment, socking and transport), physical (length, weight and feed consumption), physiological (hematocrit, plasma cortisol, pH, glucose, lactate, …

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The Evaluation Of Adsorbents For The Removal Of Aflatoxin M1 From Contaminated Milk, Erika D. Womack Dec 2015

The Evaluation Of Adsorbents For The Removal Of Aflatoxin M1 From Contaminated Milk, Erika D. Womack

Theses and Dissertations

Taking precautions to restrain aflatoxin M1 (AFM1) from milk is critical, particularly due to the health and economic impact AFM1 imposes. The predominant post-harvest means of reducing AFM1 in milk includes the addition of sequestering agents to feed to diminish the bioavailability of aflatoxin B1 (AFB1), the parent compound of AFM1 found in contaminated feed. Still, residual AFM1 has been found in the milk. Using sequestering agents added to raw milk, we found that activated carbon was the most effective binder to reduce AFM1 contamination. The combination of 0.75% granular activated carbon (GAC) and a flow rate of 0.4 mL/min …

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Morphological And Physiological Characterization Of Sweetpotato Roots After Skinning, Nestor Bonilla Bird Dec 2015

Morphological And Physiological Characterization Of Sweetpotato Roots After Skinning, Nestor Bonilla Bird

Theses and Dissertations

Sweetpotato is an important staple crop, and a supplementary source of nutrients; minerals, carbohydrates, and vitamins, for the food industry. Quality of sweetpotatoes depends on cultivar, preharvest management practices, and harvest equipment causing skinning. Information on morph-physiological characteristics of storage roots is needed for preharvest management decisions, cultivar selection, and application of harvest aids and harvesting procedures for postharvest storage durability of sweetpotatoes. Also, devices to measure skinning properties of storage roots are needed. This research was conducted to measure skin toughness of various sweetpotato cultivars. The number of skin layers was determined using fluorescent microscopy, and lignin content was …

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The Keetch-Byram Drought Index And The Geographical Variability In Wildfire Size And Frequency In Eight Natural Areas Of The United States, Michael Tobit Gray Dec 2015

The Keetch-Byram Drought Index And The Geographical Variability In Wildfire Size And Frequency In Eight Natural Areas Of The United States, Michael Tobit Gray

Theses and Dissertations

A continental-scale study of historic wildfire data within and across ecoregion provinces was conducted and geographical gradients in seasonal measures of wildfire size and frequency were observed. In the conterminous United States, western ecoregion provinces show north-south gradients in duration of season (short-to-long) and peak of season (early-to-late). Across the continent a gradient of unimodal to bimodal seasonal distributions of wildfire size and frequency was shown: western ecoregions have a single summer fire season and eastern regions have spring and late-summer fire seasons separated by an intervening dip in wildfire activity. From the ecoregion provinces with the highest wildfire frequency, …

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