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Strategies For Successful Mangrove Living Shoreline Stabilizations In Shallow Water Subtropical Estuaries, Rebecca Fillyaw
Strategies For Successful Mangrove Living Shoreline Stabilizations In Shallow Water Subtropical Estuaries, Rebecca Fillyaw
Electronic Theses and Dissertations, 2020-
Mangrove living shorelines are an effective alternative to hard-armoring, which combat erosion while also increasing habitat. To improve the success of future mangrove deployments, an experimental Rhizophora mangle living shoreline was deployed within Mosquito Lagoon, FL. A factorial design was used to test the impact of mangrove age, breakwater presence, and mangrove placement on mangrove survival and growth. Environmental factors were monitored to isolate the reason for mangrove mortalities. Mangrove age was represented by 3 developmental stages: "seedlings" at 11-months-old, "transitionals" at 23-months-old, and "adults" between 35 and 47-months-old. Mixed mangrove age groups were included to identify if seedling survival …
Invasive Bullfrogs Maintain High Levels Of Immune Gene Diversity Despite Elevated Bd Infection Relative To Native Populations, Jacob Lafond
Invasive Bullfrogs Maintain High Levels Of Immune Gene Diversity Despite Elevated Bd Infection Relative To Native Populations, Jacob Lafond
Electronic Theses and Dissertations, 2020-
Maintenance of genetic diversity at ecologically-relevant loci may be important for allowing invasive populations to become established despite decreases in genomic diversity due to founder effects. To evaluate this prediction, we compared genetic diversity at an expressed MHC class IIß gene fragment to a 909 bp region of the neutral cytochrome b (cytb) locus from 20 populations of the American bullfrog (Rana catesbeiana) across its North American invasive and native ranges and quantified the presence of Batrachochytrium dendrobatidis (Bd), a pathogen, for which R. catesbeiana is a vector species. We recovered 28 unique MHC alleles and found that invasive populations …
Assessing The Role Of Disturbance In Estuarine Fish Community Dynamics, Dakota Lewis
Assessing The Role Of Disturbance In Estuarine Fish Community Dynamics, Dakota Lewis
Electronic Theses and Dissertations, 2020-
Ecological disturbances alter biotic communities and ecosystems. In many coastal zones disturbances are increasing, including algal blooms, storms, hypoxic events, and fish kills. These disturbances are often related, for example blooms releasing toxins or depleting dissolved oxygen, ultimately killing fish. Depending on the intensity, duration, and geographic extent of a disturbance, the fish community can take days to years to recover from disturbances. To explore the relationships among environmental disturbances, sport fish, and forage fish communities, this thesis examined two Florida estuaries with differing disturbance regimes. Using an ensemble modelling approach combining generalized linear models (GLM), Bayesian modelling, and Bayesian …
Monitoring Landscape And Spectral Dynamics Of Subtropical Freshwater Wetlands That Have Undergone Hydrological Restoration, Sarah Parker
Monitoring Landscape And Spectral Dynamics Of Subtropical Freshwater Wetlands That Have Undergone Hydrological Restoration, Sarah Parker
Electronic Theses and Dissertations, 2020-
Over the last century, millions of hectares of wetlands have been lost due to urban development and agricultural activities throughout the world. In the U.S., efforts have been made by federal and state legislation to restore wetland habitat in exchange for development on wetlands. To restore ecosystem function by reestablishing hydrological metrics (e.g., groundwater level fluctuations), wetland restoration aims to facilitate the growth of wetland vegetation to approximate the original conditions as a proxy for ecological integrity. In 1992, the first landscape-scale off-site mitigation project, the Disney Wilderness Preserve (DWP) was funded by the Walt Disney Company in Poinciana, Florida. …
Correlations In Microplastic Abundance Between Water, The Eastern Oyster, Crassostrea Virginica, And Their Biodeposits In A Dynamic Florida Estuary, Casey Craig
Electronic Theses and Dissertations, 2020-
Estuaries have been identified as hotspots of microplastic pollution because they are transitional zones where coastal freshwater and oceans converge. Microplastics (MP) are transported through estuaries by a dynamic series of forces such as surface flow and tides, which influence MP abundances and trends. The eastern oyster, Crassostrea virginica, is an estuarine bivalve known to ingest MP, resulting in negative impacts on organism physiology. I investigated MP pollution as a threat to C. virginica in a dynamic Florida estuary, the Indian River Lagoon (IRL), and determined there are both regional and small-scale spatial and temporal fluctuations in MP abundance. Tributaries …
Long-Term Changes In Juvenile Green Turtle Abundance And Foraging Ecology In The Indian River Lagoon, Florida, Christopher Long
Long-Term Changes In Juvenile Green Turtle Abundance And Foraging Ecology In The Indian River Lagoon, Florida, Christopher Long
Electronic Theses and Dissertations, 2020-
Marine turtles are distributed in temperate, sub-tropical and tropical waters and beaches worldwide, often in areas heavily impacted by humans. Although there are many threats to marine turtle populations, the growing threats of nutrient pollution and harmful algal blooms are relatively understudied despite their widespread impacts on coastal marine ecosystems that marine turtles depend on. By studying juvenile green turtles (Chelonia mydas) in the Indian River Lagoon, Florida, where nutrient pollution and HABs are a widespread and longstanding issue, I aimed to conduct a case study of how these threats may affect this federally Threatened species. In Chapter 2, I …
Non-Lethal Predictors Of Organ Level Metal Contaminants In Central Florida Red-Shouldered Hawks, Jennifer Bouchenot
Non-Lethal Predictors Of Organ Level Metal Contaminants In Central Florida Red-Shouldered Hawks, Jennifer Bouchenot
Electronic Theses and Dissertations, 2020-
Elemental contaminants aggregate in the environment due to human activity and can induce detrimental physiological effects within organisms. Birds exhibit exceptional susceptibility to many pollutants and are popular biomonitoring agents throughout the world. Birds of prey are of special interest due to their substantial biomagnification potential. Lethal sampling of internal organs yields accurate contaminant measurements, but recent sampling trends are endeavoring towards non-destructive sampling such as feathers. This methodological shift stems from researchers' preference for less-regulated samples, enhanced animal welfare, and broadening the possible collaborative audience with simpler protocols. Unfortunately, investigations of feathers have shown that their accuracy is capricious …
A Drosophila P5b-Type Atpase Is Required For Polyamine Transport, David Brown
A Drosophila P5b-Type Atpase Is Required For Polyamine Transport, David Brown
Electronic Theses and Dissertations, 2020-
In eukaryotes P-type ATPases are represented by a superfamily of membrane ion and lipid transporters divided into five subclasses. Substrates for classes 1-4 have been identified, however little is known about the substrate specificity of the P-type 5A and 5B transporters. Here we show that the Drosophila gene anne boleyn encodes a family of six P5B-type ATPases. Using a combination of RNAi, insertional mutagenesis, and CRISPR-Cas9 gene editing we show that some of these isoforms are required for polyamine transport and others are not. In addition, we show that the Drosophila P5A-type ATPase, encoded by CG6230 is not required for …
Bird Abundance And Diversity And The Impact Of Oyster Reef Restoration On The Bird Community In Mosquito Lagoon, Florida, Usa, Jessica Copertino
Bird Abundance And Diversity And The Impact Of Oyster Reef Restoration On The Bird Community In Mosquito Lagoon, Florida, Usa, Jessica Copertino
Electronic Theses and Dissertations, 2020-
Birds are often used as indicators for biodiversity and ecosystem health. While birds have been monitored in other parts of the Indian River Lagoon (IRL), there has been little research on birds in Mosquito Lagoon (ML, the northernmost portion of the IRL). This thesis first examines the abundance and diversity of birds in ML by using two years of photographic observations to assess seasonal variations and the use of various habitat features by specific bird taxa. Abundance and species richness were highest in winter, while evenness and Simpson's diversity were highest in summer. Moreover, natural and artificial habitat features were …