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Diffuse Degassing And The Hydrothermal System At Masaya Volcano, Nicaragua, Sophie C. P Pearson

USF Tampa Graduate Theses and Dissertations

Hydrothermal systems change in response to volcanic activity, and in turn may be sensitive indicators of volcanic activity. Fumaroles are a surface manifestation of this interaction. We use time series of soil temperature data and numerical models of the hydrothermal system to investigate volcanic, hydrologic and geologic controls on this diffuse degassing.

Soil temperatures were measured in a low-temperature fumarole field located 3.5 km from the summit of Masaya volcano, Nicaragua. They respond rapidly, on a time scale of minutes, to changes in volcanic activity also manifested at the summit vent. The soil temperature response is repetitive and complex, and …

Analysis Of Mangrove Structure And Latitudinal Relationships On The Gulf Coast Of Peninsular Florida, Peter Novitzky

USF Tampa Graduate Theses and Dissertations

The coastline of Florida has been formed by geomorphic processes which have created suitable habitats for certain vegetation and organisms. One type of vegetation is the mangrove; this plant has a latitudinal range of 24° to 32° N latitude which is associated with local climatic changes (Mitsch 2000). There are three species of mangrove found in Florida: red (Rhizophora), black (Avicennia), and white (Languncularia) (USGS 2006). Mangroves have adapted overtime to live in different ecosystems which cause mangroves, along the Florida coast, of the same species not be the same.

Climatic variation causes individual mangrove trees have structural differences such …

The Comparison Of Mitochondrial Functions Of 2 Drosophila Species: Drosophila Ananassae And Drosophila Subobscura, Hye J. Shin

All ETDs from UAB

Recently, it has been suggested that differences in mitochondrial function enabled Homo sapiens to migrate out of Africa by enabling humans to adapt to colder environments as they migrated to higher latitude areas. Through mitochondrial mutations that partially uncoupled oxidative phosphorylation, humans that moved to colder areas were able to generate more heat for better survival, while producing less energy. However, due to challenges in working with human populations, no specific studies have been able to show the existence of such differences in mitochondrial function within healthy humans. Because of numerous advantages of Drosophila as a developmental model, such as …