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Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
The community abundance and diversity of mRNA transcripts for sulfate-reducing prokaryotes were investigated in parallel with rate measurements of sulfate reduction activity in marine subsurface sediments of Aarhus Bay, Denmark. Solid...
The deep-sea, soft-bottom habitat is considered the largest ecosystem on Earth, yet little is known about the biogeography of the infauna. This dissertation examines the species' ranges of the meiofaunal taxon Harpacticoida (Crustacea:...
ABSTRACT This work presents turbulence data collected in the Gulf of Mexico in an attempt to quantify the source or sources of turbulent dissipation along the continental shelf and any possible causes for its seasonal change. In addition...
The growth of a locally isolated strain of green algae, Chlorella sp., selected for its promise as a biodiesel feedstock, was studied in wastewater effluent from the municipal wastewater treatment plant in Tallahassee FL. Nutrient...
Sheepshead (Archosargus probatocephalus) are a popular recreational fisheries species in the Gulf of Mexico. Unfortunately, the highest reported catch of this species occurs primarily during their reproductive period. As a result, ...
Cross-slope flow is critical for governing heat and material exchange, including pollutants and biota, between the coastal and deep ocean. This study focuses on characterizing the variability of cross-slope near-bottom flow in the DeSoto...
Hardbottom habitats in the northeastern Gulf of Mexico provide a variety of valuable ecological goods and services including functioning as nursery habitats and providing refuge for resident organisms. In this study, I identified the...
Though a large fraction of primary production and organic matter cycling in the oceans occurs on continental shelves dominated by sandy deposits, the microbial communities associated with permeable shelf sediments remain poorly...
The Florida manatee (Trichechus manatus latirostris) is an obligate aquatic mammal that inhabits shallow coastal waterways. Previous research has demonstrated that manatees vocalize using frequencies that range from < 0.5 kHz to 12 kHz ...
To avoid unfavorable seasonal conditions, some species of calanoid copepods produce resting eggs that do not immediately hatch. When buried in the sediment, these eggs can remain viable from weeks to years, and therefore can represent a...
Fate of the Mesophotic Coral Ecosystem (MCE) in the Northeastern Gulf of Mexico after the Deepwater Horizon Incident: Impacts, Restoration, Conservation, and Hazards
The Gulf of Mexico, one of the most geomorphologically complex oceanic basin, is also one of the most prolific hydrocarbon reserves in the world. It hosts a varied range of marine communities from shallow reefs and estuarine communities...
The northern part of the West Florida Shelf (WFS) bends sharply to form Florida's Big Bend coast. Eulerian acoustic Doppler current profiler measurements on this narrowing shelf, the first multiyear in situ measurements in this region, ...
Nitrate (NO3-) and uranium (U) are priority co-contaminants at U.S. Department of Energy (DOE) managed nuclear legacy waste sites, where nitric acid was extensively used to process uranium waste. This combination of a low pH and mixed...
Dinoflagellates are unicellular, eukaryotic organisms that consist of both photosynthetic and non-photosynthetic species. The approximately 91 known species of bioluminescent dinoflagellates are the pre-dominate contributors to ocean...
Zinc acts as a micronutrient in the ocean, capable of influencing and potentially controlling phytoplankton productivity and community structure. Thus, it is important to quantify the distribution of dissolved Zn in the oceans, in...
Water residence time is an important parameter in defining how an estuary functions. The focus of this research was on the residence time and its implications on environmental health. Radium isotopes (223Ra, 224Ra, 226Ra, 228Ra) have...
This dissertation examines the role of microorganisms in marine biogeochemical cycles with a particular emphasis on sedimentary nitrogen transformations. Nitrogen is required by all living organisms and is a key nutrient controlling the...
This dissertation seeks to understand physical processes in submerged and dry caves in Florida. First, for submerged caves, we prove the possibility of an upward saline water intrusion due to the Venturi effect occurring in a submerged...
Mariculture of fish is needed to support our ever growing global population. Copepods are a natural and beneficial source of first feed for many marine fish species, but it can be difficult to hatch enough when the fish are ready to feed...
Numerical ocean models have become powerful tools for providing a realistic view of the ocean state and for describing ocean processes that are difficult to observe. Recent improvements in model performance focus on simulating realistic...
Blood biochemistry profiles aid health assessment of marine turtles but knowledge of the influence of regional biological factors (e.g. habitat, diet) on marine turtle blood analyte values is limited. To investigate the influence of diet...
LLocal climate influences sea turtle hatching and emergence success with climatic extremes affecting embryonic development and hatchling emergence. Thus, it is crucial to understand how different climatic variables affect hatchling...
The Variability of Certain Life-History Parameters of Early Juvenile Gag Grouper (Mycteroperca Microlepis, Pisces: Serranidae) in the Northern Gulf of Mexico
Gag grouper, Mycteroperca microlepis, compose an important recreational and commercial fishery along the Gulf coast and Eastern Seaboard of the United States (Coleman et al. 2000, Morris et al. 2000, and Musick et al. 2000). Like many...
By sampling individual rain events over a 1-year period at three sites situated around a known point source of atmospheric mercury, we have attempted to quantify its influence on local mercury deposition. A suite of trace elements was...
Uranium contamination is widespread in subsurface sediments at mining and milling sites across North America, South America, and Eastern Europe. In the U.S. alone, the Department of Energy (DOE) is responsible for the remediation of 7...
The DOC reactivity of a northern peatland was investigated by measuring and modeling concentrations, stable isotopes, and natural abundance radiocarbon of solid phase peat, DOC, DIC, and CH4 in field and lab studies. We tested the...
Utilizing Indian Ocean Calcareous Nannofossil Biostratigraphy of Miocene Sediments to Investigate Tectonic and Climatic Forcing during the Evolution of the Himalayas
The geological history of Himalayans and Tibetan Plateau is important for understanding how our planet evolves, and how geological structures can have local and global effects on climate and floral and faunal evolution of a system. This...
Despite being a known benthic biological hotspot and environmental ecotone, the DeSoto Canyon has hardly been characterized for its benthic diversity and community structure. Moreover, it is a known deposition and impact zone due to...
One way to slow down global warming is to reduce the amount of carbon dioxide released into the atmosphere by capturing carbon dioxide from point sources (e.g., power plants) and storing it out of contact with the atmosphere. One storage...
Submarine groundwater discharge (SGD) is an important pathway for trace element and nutrient cycling in the coastal ocean. I use a combination of hydrological and geochemical tracer observations to gain insights into the natural and...
Hardbottom coral and sponge communities differ along portions of the WFS in species occurrence, diversity or size. However, specific differences and spatial distribution of these communities are not well understood. Community transitions...
Seamounts are considered biodiversity hotspots with a range of physical, chemical, and geological parameters that enrich their habitat heterogeneity compared to the surrounding environment. Evidence for the spatial variation of fauna...
In the North Pacific, seamounts are important ecological hotspots for deep-sea species found below 200 m. Connectivity of deep-sea fauna in this area is of great interest to fisheries and conservation management for possible restoration...
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