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Full-Text Articles in Life Sciences
Succession In Native Groundwater Microbial Communities In Response To Effluent Wastewater, Chelsea M. Dinon
Succession In Native Groundwater Microbial Communities In Response To Effluent Wastewater, Chelsea M. Dinon
USF Tampa Graduate Theses and Dissertations
Aquifer storage and recovery techniques are used globally to mitigate increasing demands for groundwater. Microcosms were used to evaluate the effect of wastewater effluent that may be used for aquifer storage and recovery injection on native aquifer microbial communities. Sulfur Springs water was used as the source of aquifer water. The microcosms were 100% spring water, 100% unchlorinated filtered wastewater effluent, or one of three mixtures of unchlorinated filtered wastewater effluent and spring water. The mixture microcosms were 50%, 30%, and 10% unchlorinated filtered wastewater effluent with the balance as spring water. The effluent water was UV treated prior to …
Microbial Community Structures In Three Bahamian Blue Holes, Meghan J. Gordon
Microbial Community Structures In Three Bahamian Blue Holes, Meghan J. Gordon
USF Tampa Graduate Theses and Dissertations
This study used 16S rDNA metagenomics and water chemistry to conduct an examination of microbial community dynamics and biogeochemistry in three physically adjacent, sunlit blue holes with variable hydrologic regimes on San Salvador Island, Bahamas. Church and Watling’s Blue Holes are holomictic with relatively clear waters, while Inkwell Blue Hole hosts density stratification and waters stained brown with tannins. Based on water color and clarity and physicochemical profiles, I hypothesized Church and Watling’s Blue Holes would be dominated by oxigenic photoautotrophs, and that the bottom layer of Inkwell would be characterized by euxinic (anoxic and sulfidic) conditions and host primarily …
Spatiotemporal Changes Of Microbial Community Assemblages And Functions In The Subsurface, Madison C. Davis
Spatiotemporal Changes Of Microbial Community Assemblages And Functions In The Subsurface, Madison C. Davis
USF Tampa Graduate Theses and Dissertations
The subsurface hosts diverse microbial community assemblages and functions. These communities play an important role in biogeochemical cycling and groundwater purification. Many physicochemical factors affect microbial communities and can cause short-term or long-term perturbations. Subsurface microbes are susceptible to anthropogenic changes in the environment, which can be caused by nutrient inputs or municipal groundwater extraction. Despite the importance of the subsurface microbiome, these microbial communities are poorly characterized. This dissertation describes the characterization of spatiotemporal drivers of subsurface microbial communities through a variety of techniques that include eDNA analyses, bioinformatics, hydrochemical analyses, stable isotope geochemistry, and multivariate statistics. Three coastal …
Prokaryotic And Viral Community Composition Of Freshwater Springs In Florida, Usa, Kema Malki, Natalie A. Sawaya, Anna J. Székely, Michael J. Tisza, Mya Breitbart
Prokaryotic And Viral Community Composition Of Freshwater Springs In Florida, Usa, Kema Malki, Natalie A. Sawaya, Anna J. Székely, Michael J. Tisza, Mya Breitbart
Marine Science Faculty Publications
Aquifers, which are essential underground freshwater reservoirs worldwide, are understudied ecosystems that harbor diverse forms of microbial life. This study investigated the abundance and composition of prokaryotic and viral communities in the outflow of five springs across northern Florida, USA, as a proxy of microbial communities found in one of the most productive aquifers in the world, the Floridan aquifer. The average abundances of virus-like particles and prokaryotic cells were slightly lower than those reported from other groundwater systems, ranging from 9.6 × 103 ml−1 to 1.1 × 105 ml−1 and 2.2 × 103 ml …