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Articles 1 - 11 of 11
Full-Text Articles in Life Sciences
Ecosystem Functional Consequences Of Top Predator Mortality Due To The Invasive Shrub, Lonicera Maackii, Josey Lee-Anne Berta
Ecosystem Functional Consequences Of Top Predator Mortality Due To The Invasive Shrub, Lonicera Maackii, Josey Lee-Anne Berta
Online Theses and Dissertations
Lonicera maackii (Amur Honeysuckle) is an invasive woody plant species that is present across the United States. Previous studies have assessed the biotic effects of honeysuckle, as well as abiotic effects such as changes in soil chemistry, ground level light, and forest floor temperature. Although directs effects of L. maackii on native terrestrial plant communities are well studied, little is known about its indirect effects, especially in aquatic ecosystems. Based on limited prior studies, I predicted addition of L. maackii leaves to aquatic systems would increase mortality of a top amphibian predator due to the release of phenolic compounds that …
Habitat Use And Nightly Activity Patterns Of Bats On A Military Landscape In Western Kentucky, Carson E. Mcnamara
Habitat Use And Nightly Activity Patterns Of Bats On A Military Landscape In Western Kentucky, Carson E. Mcnamara
Online Theses and Dissertations
Bat populations of eastern North America continue to decline due to the cumulative effects of White-nose Syndrome, habitat loss, and anthropogenic disturbances across the landscape. Unique stressors exist on military installations, such as noise created during training activities. Given the scarcity of data that exists for these widespread ownerships, I created predictive models for nightly bat activity related to local habitat, landscape, and military use parameters. Bat activity was assessed during the summers of 2016 and 2017 using full-spectrum acoustic detectors across the Wendell H. Ford Regional Training Center (WHFRTC), a ca. 4200 ha military landscape in the Interior Rivers …
Ecosystem Functional Consequences Of Body Size Variation In An Apex Predator (Ambystoma Jeffersonianum), David Samuel Smith
Ecosystem Functional Consequences Of Body Size Variation In An Apex Predator (Ambystoma Jeffersonianum), David Samuel Smith
Online Theses and Dissertations
Biodiversity is often emphasized at the species level where each species is assigned a mean functional trait value. However, populations within a species, and individuals within a population, often exhibit considerable intraspecific functional variation. Therefore, instead of focusing on species’ mean trait values, we must incorporate intraspecific variation when considering species’ ecological roles and conservation values. The primary objective of this study was to determine the effects of variation in body size (a functional trait in many aquatic taxa) in an apex predator on ecosystem functioning. We sought to characterize trophic cascades initiated by larval populations of Ambystoma jeffersonianum that …
Vocalizations Of Adult American Kestrels (Falco Sparverius): Effect Of Breeding Stage, Sex, And Context On Call Use And Characteristics, Mark Winland
Online Theses and Dissertations
American Kestrels (Falco sparverius) are small falcons with a vocal repertoire known to consist of three different vocalizations: whine, chitter, and klee calls. However, the characteristics and contextual use of these calls have not been quantified. To determine the characteristics of these calls and better understand possible functions, I conducted a combined observational and experimental study of American Kestrels in Madison County, Kentucky, from February to July 2013. I observed kestrels and recorded all vocalizations uttered by males and females during different breeding stages and different behavioral contexts. In addition, I conducted playback experiments using the whine, chitter, and klee …
Population Demographics And Active Foraging Behavior Of Copperheads (Agkistrodon Contortrix) At A Recreational Site In Eastern Kentucky, Jocelyn Hendricks
Population Demographics And Active Foraging Behavior Of Copperheads (Agkistrodon Contortrix) At A Recreational Site In Eastern Kentucky, Jocelyn Hendricks
Online Theses and Dissertations
Recreational areas represent a significant source of human-wildlife interaction, which can have an especially negative effect on organisms, like snakes, that are generally perceived as dangerous by the public. Considering the projected increase in recreation rates in the United States, the threat to this already vulnerable group of organisms deserves attention. While habitat factors associated with recreational areas—fragmentation, decreased canopy cover, altered vegetation composition—have been shown to affect snake thermoregulatory behavior and abundance, detailed studies of wild snake behavior are uncommon due to their cryptic nature. The goal of this study was to reduce human-wildlife conflict at a recreational site …
The Effects Of A 40-Minute Bout Of Aerobic Exercise On State Anxiety In College Age Individuals, Rachael Dozier
The Effects Of A 40-Minute Bout Of Aerobic Exercise On State Anxiety In College Age Individuals, Rachael Dozier
Online Theses and Dissertations
The purpose of this study was to determine if a forty-minute bout of aerobic exercise would decrease the state anxiety and heart rate of college aged individuals. This study was prompted due to the higher levels of anxiety in college aged individuals found in literature (Silva & Tucci, 2018). Specifically, college students need healthy alternatives to cope with their anxiety instead of turning to alcohol. Heightened levels of anxiety in this age range have been shown to increase negative coping habits, such as drinking, drugs, and eating disorders. These negative habits not only affect the individual physically, but also can …
Perceived Predation Risk And The Responses Of Adult And Nestling Tree Swallows (Tachycineta Bicolor), Natalia May Maass
Perceived Predation Risk And The Responses Of Adult And Nestling Tree Swallows (Tachycineta Bicolor), Natalia May Maass
Online Theses and Dissertations
Some species of birds have alarm calls that are functionally referential and provide their nestlings with information about the level of threat predators may pose. Although several investigators have examined the responses of nestlings of species with open-cup nests to the anti-predator calls of adults, few have conducted such studies with cavity-nesting species of birds. Therefore, the objectives of my study were to examine the vocal responses of cavity-nesting adult Tree Swallows (Tachycineta bicolor) to different nest predators, some able and others unable to enter nest cavities, and to examine the responses of nestlings to those vocalizations. My study was …
Knockout Of The Trans-Acting Riboswitches In Listeria Monocytogenes To Disrupt Downstream Virulence Factors, Robert Jackson
Knockout Of The Trans-Acting Riboswitches In Listeria Monocytogenes To Disrupt Downstream Virulence Factors, Robert Jackson
Online Theses and Dissertations
Listeria Monocytogenes (L. monocytogenes) is a ubiquitous bacterium that can be found in both soil and water. This opportunistic intercellular pathogen is often food-borne and can lead to serious illness or death of those that are immunocompromised. Current medical research into the practical use of this pathogen has revealed that the intercellular mechanisms can be exploited to produce a cancer vaccine. Currently L. monocytogenes is being studied as a viable candidate for various other cancer vaccines and therapies. The purpose of this study is to reduce the downstream virulence factors that heavily rely on upregulation of the prfA gene. In …
The Role Of Continuous Flowering Phenology For In Neotropical Plant-Pollinator Interactions For Use In Conservation, Chelsea Renee Hinton
The Role Of Continuous Flowering Phenology For In Neotropical Plant-Pollinator Interactions For Use In Conservation, Chelsea Renee Hinton
Online Theses and Dissertations
The diversity of mutualistic interactions in the Neotropics exceeds that of all other tropical regions and is posited to result from a unique assemblage of plant species that produce the highest spatio-temporal predictability of food resources. A rare component of the Neotropical flora that contributes largely to the spatio-temporal predictability of food resources is found in understory shrub or tree-let species with a continuous reproductive phenology (i.e. produce fruit and flowers daily during all months of the year). Plant-animal interaction science suggests that plant species with a longer duration of reproductive phenology will accumulate more mutualistic partners over time and …
Effects Of Alpha-Gpc And Huperzine-A On Short Term Memory, Anaerobic Power Output, Post Exhaustion Compared To Caffeine And Placebo In Healthy College Age Students, John P. Isaacs
Online Theses and Dissertations
Introduction: The use of multi-ingredient pre-workout supplements has been steadily on the rise in the fitness industries. Companies make claims about improvements in performance both physically and cognitively for users but seldom provide research to back up the claims made about the ingredients or dosages. Purpose: To examine the effects of Huperzine-A and Alpha-GPC on short term memory and anaerobic power output, post exhaustion compared to caffeine and placebo in healthy college age students. Methods: The study was conducted as a double blind, placebo controlled, randomized design on 62 healthy adults (N=62 height 68.4 ± 3.5 in., weight 78.5 ± …
The Use Of Environmental Dna For The Detection Of Palaemonias Ganteri (Hay, 1901), A Federally Endangered Cave Species, Andrew Joseph Stump
The Use Of Environmental Dna For The Detection Of Palaemonias Ganteri (Hay, 1901), A Federally Endangered Cave Species, Andrew Joseph Stump
Online Theses and Dissertations
Kentucky’s limestone caves and karst water systems are an ecologically important part of its natural heritage and home to many unique subterranean species. In addition to being geologically interesting, it is also home to one, of only three, extant North American atyids: the federally endangered Kentucky Cave Shrimp (Palaemonias ganteri, Hay 1901). However, access for monitoring and management objectives involving this species and other cave inhabitants can be difficult, highly contingent upon environmental conditions, and time consuming with low yields using traditional techniques. Advancements in metabarcoding and Next Generation Sequencing (NGS) technologies provide tools that may allow researchers and managers …