Terrestrial and Aquatic Ecology Commons^™

A Small-Scale Wave Tank For Living Shoreline Extension And Outreach, Keith Chenier Jr, Jaden Akers, Skylar Liner, Shelby Harrier, Eric Sparks, Patrick Biber, Laura Blackmon, Jessica Kastler, Patrick Broussard

Journal of Extension

Hardened structures, such as bulkheads and seawalls, are currently the primary choice of shoreline protection for waterfront property owners. However, hardened shorelines are known to enhance erosion and often promote the loss of intertidal habitat. Living shorelines are a collection of environmentally friendly construction techniques that serve as an alternative to hardened shorelines through the incorporation of natural materials, such as native plants. To enhance extension and outreach efforts related to the promotion of living shorelines, we created a small-scale, hands-on wave tank that demonstrates the benefits of natural and living shorelines relative to hardened structures. This interactive tool allows …

What Are The Impacts Of Deer Browsing And Japanese Stiltgrass (Microstegium Vinenium) On Native Sapling Growth In A Residential Wetland In Southeastern Georgia?, Josie Richards

Honors College Theses

Wetlands promote biodiversity, act as climate stabilizers, and regulate water flow, yet are vulnerable to invaders. An invasive species can affect the biodiversity, abiotic conditions, and increase vulnerability of an ecosystem over time and deer browsing can actively affect new growth by removing the apical buds of young woody vegetation. Japanese stiltgrass (Microstegium vimineum), a wetland specific invader, has been shown to compete against native species for limited resources and actively crowd them out. Growth of native saplings can be further complicated by the presence of white tailed deer (Odocoileus virginianus), which browse woody vegetation and limit recruitment of trees. …

Effect Of Temperature On The Microbiome Of A Laboratory Reared Colony Of Haemaphysalis Longicornis Ticks, Brianna Mitchell

Poster Presentations

Honors research poster.

Haemaphysalis longicornis is a species of tick native to eastern Asia, including eastern China, Japan, eastern Russia, and Korea. To date, it has invaded and has now established its existence in Australia, New Zealand, and several of the Pacific Islands. This species of tick has recently been introduced to the United States, having a confirmed sighting in November 2017 on a sheep farm in New Jersey and since establishing populations in 18 states along the east coast and Appalachia. Based on the existing locations of H. longicornis in its native regions, as well as in the United …

Effects Of Nonnative Plants On Space-Use In Eastern Box Turtles, Emily Ilene Crago

Graduate Theses

Introduction of nonnative plants outside their natural range has caused widespread reduction in the abundance and diversity of native plant species. Nonnative plants typically form dense, often monotypic, thickets that affect the ability of animals to find food, reproduce, avoid predation risk, and thermoregulate. By doing so, nonnative plants have the potential to displace resident animals from areas otherwise suitable as animal habitat. However, limited studies have investigated whether resident animals avoid areas dominated by nonnative plants. This study investigated impacts of nonnative plants on eastern box turtles (Terrapene carolina carolina), a species that has been declining throughout their range. …

Exploring The Relationship Between Dreissenids And The Deep Chlorophyll Layer In The Laurentian Great Lakes, Lara E. Hargrave

Great Lakes Center Masters Theses

In the Laurentian Great Lakes, two invasive bivalves Dreissena polymorpha and Dreissena rostriformis bugensis have induced a number of changes, including increased water transparency, alterations in nutrient cycling, decreased chlorophyll concentrations, and changes in phytoplankton community composition and structure. These changes are likely to have implications for the deep chlorophyll layer (DCL), a feature characterized by phototrophic organisms reaching abundance at light levels far below ideal for photosynthesis. Though the impacts of D. polymorpha and D. r. bugensis in the Great Lakes have been studied for at least the last three decades, little is known about how these ecosystem engineers …

Sand Escarpments As A Potential Barrier To The Nesting Distribution Of Sea Turtles, Dakota Ronco

Undergraduate University Honors Capstones

Sea turtles are a part of both the marine and terrestrial ecosystems as primary and secondary consumers. By laying nests on the beaches and migrating across the ocean, sea turtles are significant in maintaining the nutrient (nitrogen and phosphorus) flux between terrestrial and marine ecosystems. Nests bring nutrients into the sand by decomposing unhatched eggs and egg remains. The distribution of their nests is significant in getting insights into the population density of sea turtles and what drives the nesting location, which ultimately regulates nutrient flux. The location of their nests is driven by sandy beach ecosystem structures, especially active …

It’S Free Real Estate: Benthic Assemblage Composition On Bluehead Chub Nests In Southeastern Streams, Isabel Evelyn

All Theses

Positive interactions such as facilitative habitat modification are often strong drivers in structuring communities. The Bluehead Chub (Nocomis leptocephalus) is a common fish in Piedmont streams of the southeastern USA that builds gravel mound spawning nests that other native fish species utilize as critical spawning substrate. These nests are colonized by other freshwater benthic organisms, though few studies have investigated these colonizing assemblages. The goal of this study was to quantify differences in benthic assemblage composition and abundance between Bluehead Chub nests and unmodified streambed substrate as well as relative taxa microhabitat associations in relation to stream reach-wide …

Hibernating Tricolored Bats At A Southeastern Recreation Site: Microsite Use And Public Perceptions, Rebecca Brown

All Theses

High bat mortality from white-nose syndrome (WNS) has increased the need to manage hibernation sites. Management decisions should be based on science, and when sites are accessible to the public, also need to consider human dimensions. We used Stumphouse Tunnel, a recreation site and tricolored bat (Perimyotis subflavus) hibernaculum in northwestern South Carolina, as a case study to understand potential conflicts between conservation and recreation. The population declined by 90% after the arrival of white-nose syndrome (WNS), followed by stabilization and slight increases. Because the increase was associated with more bats roosting in the publicly accessible section, a potential …

Immediate Response Of Bats To Prescribed Fire And Impact Of Experiences On Women's Self-Image In Natural Resources Professions, Zebria Hicks

All Theses

To inform use of prescribed fire management practice in the southeastern US, we studied its impact on bats, which are important and at-risk species. We evaluated if prescribed fire had a positive, neutral, or negative effect on bat activity in the two weeks following the burns. We recorded bat activity after prescribed burns in February and March 2022 in northwestern South Carolina in select hardwood and pine stands and control sites ≥ 500 m from burn boundaries. We measured insect abundance, canopy cover, basal area, and understory density at each site. We recorded 687 passes during our 45-day study period. …

Growth, Mortality, And Movement Of Endemic Bartram's Bass And Invasive Alabama Bass In Upper Savannah River Basin Tributaries, Tyler Zumwalt

All Theses

Bartram’s Bass are an endemic to the Upper Savannah River basin in North Carolina, South Carolina, and Georgia. Bartram’s Bass are facing many risks, primary among them being hybridization with nonnative Alabama Bass. More recently, nonnative Alabama Bass and their hybrid congeners have been observed moving from reservoirs into tributaries where the remaining Bartram’s Bass populations exist. Thus, for Chapter 1 we sought to better understand the threat of nonnative gene spreading in tributary systems. To do this, we 1) quantified the movement of pure Alabama Bass, Bartram’s Bass, and their hybrids, 2) assessed correlations between movement and abiotic variables, …

Seasonal Variation In Condition, Body Lipid, Reproductive Investment, And Diet In Brook Stickleback (Culaea Inconstans), Matthew P. Basista, Randal Snyder, Christopher Pennuto, Alicia Perez-Fuentetaja

Great Lakes Center Masters Theses

North-temperate fishes are subject to significant changes in abiotic and biotic conditions across seasons, which are likely reflected in temporal differences in energy dynamics, reproductive investment, and diet. This study explores seasonal changes in body lipid content, female reproductive investment (GSI), body condition (Fulton’s K), and diet in brook sticklebacks (Culaea inconstans) in Western New York. I expected body lipid content and body condition would decline during the breeding season reflecting energy expenditure for reproduction, and these parameters would increase in the summer and fall prior to the onset of winter. Based on previous studies, I also expected …

Effect Of Temperature On The Microbiome Of A Laboratory-Reared Colony Of Haemaphysalis Longicornis Ticks, Brianna L. Mitchell

Honors Theses

Haemaphysalis longicornis ticks are invasive to the United States with potential to transmit several tick-borne pathogens that are native to the United States. Based on existing locations of H. longicornis in its native regions in Asia, as well as its invasive populations that are established in the United States, several geographic range prediction models have been produced to help understand future range expansion and distribution of this invasive tick in North America. Unfortunately, these models do not all agree and there is uncertainty associated with the potential geographic range expansion of H. longicornis ticks in North America. Climate can affect …

Determination Of Cadmium Uptake In Crassostrea Virginica Shell Under Controlled Conditions, Joseph John Pavelites Ii

Graduate Theses and Dissertations (2019 - present)

The objective of this thesis was to meet growing demand for the development of environmental biomonitors that protect ecosystems and public health. To do this, I determined the potential of oyster shell as a bioindicator of cadmium (Cd) in the environment by determining the mode of Cd uptake and relationships between Cd concentrations in the environment, shell, and soft tissues of juvenile eastern oysters (Crassostrea virginica Gmelin). I performed a review of the literature on the ability of oyster shell to retain metal contaminants and the factors that could affect this process (Chapter 2). I then reared C. virginica …

Revision, Description, And Diagnosis Of Adult And Larval Pycnopsyche Spp. (Trichoptera: Limnephilidae) Using Morphological And Molecular Methods, Matthew Green

All Dissertations

The genus Pycnopsyche Banks, 1905 (Trichoptera: Limnephilidae) is the 2nd most species-rich genus of Nearctic Limnephilidae. Larvae and adults are ecologically diverse and widespread throughout eastern North America. Larvae construct cases from mineral or plant material and are frequently used by biomonitoring professionals at the species level to monitor trends in water quality. However, only two species of Pycnopsyche are currently separable as larvae, with diagnosis limited by the number of unknown larvae associated with known adults. Using morphological and molecular data, the phylogenetic relationships among Pycnopsyche species and species groups were inferred with Bayesian and Maximum Likelihood analyses to …

Top Down Effects And Resource Selection By Coyotes In South Carolina, Alex Jensen

All Dissertations

Top predators play important roles in functioning ecosystems, including regulating the populations of prey species and competing with other predators. However, in the face of global change, many top terrestrial predators have declined in both range and abundance, making room for some smaller predators to expand into new niches. Coyotes (Canis latrans) in North America are a prime example of this – they have rapidly expanded their range in the last 120 years, raising concerns about their impacts on both domestic and wild species. In eastern North America, research has centered around their effects on white-tailed deer ( …

The Effects Of Habitat Isolation On Fine-Scale Genetic And Geographic Structure Of Populations Of Two Threatened Endemic Insects In Southern Nevada, Pseudocotalpa Giulianii And Icaricia Shasta Charlestonensis, Kristen Tovar

UNLV Theses, Dissertations, Professional Papers, and Capstones

Assessing the role geographic isolation and ecological specialization have on phylogeographic patterns contributes to our understanding of the evolutionary history of a species and the processes that erode genetic diversity. I used mitochondrial and nuclear genomic sequences to assess whether habitat isolation has shaped the fine-scale patterns of present-day genetic structure and diversity in two threatened insect species endemic to southern Nevada. Pseudocotalpa giulianii (Coleoptera; Scarabaeidae) is a dune obligate scarab beetle endemic to only two small, isolated sand dunes in Nye County, Nevada, with a usable habitat of less than 4.2 km sq that is impacted by on-going degradation. …

Factors That Affect Home Range Of Timber Rattlesnakes (Crotalus Horridus) In Northwest Arkansas, Bannon Gallaher

Graduate Theses and Dissertations

Conservation of animal populations requires knowledge of their habitat and spatial needs. Quantifying spatial requirements involves the analysis of home range. We examined the effects of sex, body size (SVL), body condition (log mass/log SVL), and year on home range in Timber Rattlesnakes (Crotalus horridus) in Northwest Arkansas. Individual locality data from an ongoing, 22+ year radio-telemetry study in Madison Co., Arkansas were analyzed using both minimum convex polygon (MCP) and Kernel Density Estimates (KDE). Plots of the number of sequential observations versus home range (MCP and KDE) determined that a minimum of 25 locations per individual per active season …

Effects Of Landscape And Yard Features On Mammals In Residential Yards In Northwest Arkansas, Emily Johansson

Graduate Theses and Dissertations

The human footprint is rapidly expanding, and wildlife habitat is continuously being converted to human residential properties. Most wildlife residing in developing areas are displaced to nearby undeveloped areas. However, some animals can coexist with humans and acquire the necessary resources (food, water, shelter) within the human environment. This may be particularly true when development is low intensity, as in suburban yards. Due to the wide variety in how homeowners utilize their yards, they can be considered individually managed “greenspaces.” These yards can provide a range of food (e.g., bird feeders, compost, gardens), water (bird baths and garden ponds), and …

Optimal R&D Investment In The Management Of Invasive Species, William Haden Chomphosy, Dale T. Manning, Stephanie A. Shwiff, Stephan Weiler

United States Department of Agriculture Wildlife Services: Staff Publications

Invasive alien species (IAS) threaten world biodiversity, ecosystem services, and economic welfare. While existing literature has characterized the optimal control of an established IAS, it has not considered how research and development (R&D) into new removal methods or technologies can affect management decisions and costs over time. R&D can lower the costs of control in a management plan and creates an intertemporal trade-off between quick but costly control and gradual but cheaper removal over time. In this paper, we develop and solve a continuous time dynamic optimization model to study how investment in R&D influences the optimal control of an …

The Effect Of Light Availability On Planktonic Communities Under The Ice In Stumpf Lake, Samantha Schug

Celebrating Scholarship and Creativity Day (2018-)

Ice cover is a part of the yearly cycle in bodies of water that are exposed to temperatures below the freezing point. Though the body of water is completely covered, many communities under the ice are still present and active during this time. I hypothesized that as the area cleared of snow increased, the increased light availability under the ice will cause a decrease in zooplankton abundance, as they avoid light and increase the chlorophyll concentration. Three different light availabilities were imposed on the ice by clearing three different sized areas of snow on the ice (0m, 1m and 2m). …