Browsing Geological Sciences electronic theses and dissertations (MU) by Thesis Advisor "Kelley, Cheryl A., 1961-"
Now showing items 1-6 of 6
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Changes in stable carbon isotopes of methane along a salinity gradient in a hypersaline microbial mat system
(University of Missouri--Columbia, 2007)The purpose of this study was to examine how the stable carbon isotopes of methane and possible methanogenic substrates change in microbial mat communities as a function of salinity. Microbial mats were sampled from four ... -
Dominant substrates used by methanogens in hypersaline environments
(University of Missouri--Columbia, 2010)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The central goal of this study was to determine the dominant substrates used by methanogens in the salt ponds of Elkhorn Slough, the Don Edwards ... -
Effect of increasing trimethylamine and organic matter concentration on stable carbon isotopes of methane produced in hypersaline, substrate limited environments
(University of Missouri--Columbia, 2013)Substrate limitation has been proposed as an explanation for 13C enriched methane production from endoevaporite microbial communities in hypersaline environments. To test this possibility, methane production rates and ... -
Organic matter remineralization in the sediment of two acid mine drainage lakes
(University of Missouri--Columbia, 2013)Acid mine drainage is a significant environmental problem throughout the world. At Rocky Forks Conservation Area near Columbia, MO numerous lakes have formed from old coal mining pits. Most of these lakes have a pH near ... -
Organic sulfur metabolisms in Eastern Lau Spreading Center hydrothermal vents
(University of Missouri--Columbia, 2012)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Sulfur is a central element in deep-sea hydrothermal vent systems, and many thermophiles isolated from these environments have sulfur-based metabolisms. ... -
Use of stable carbon isotopes to assess anaerobic and aerobic methane oxidation in hypersaline ponds
(University of Missouri--Columbia, 2015)Methane oxidation is known to play a significant role in reducing methane (CH4) concentrations in sediments and water columns in a variety of aqueous environments. In marine systems, for example, it is thought that more ...