Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Subsurface Biosphere"”.
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Surveying and harnessing the genetic, (meta)genomic, and metabolic potential of the deep carbonated biosphere
… the long-term effects of GCS on the in situ deep subsurface biosphere, I conducted a taxonomic, geochemical and metagenomic survey of the McElmo Dome sCCO₂ reservoir, which serves as a natural analog for GCS environments. Through 16S rRNA amplicon and metagenome sequencing, I identified …
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Geochemical controls on the distribution and composition of biogenic and sedimentary carbon
… and to estimating the extent of life in the deep subsurface biosphere. This work utilizes bulk and spatially-resolved X-ray absorption spectroscopy to characterize the OC content and composition of various environmental systems in order to identify the role of minerals and surrounding geochemistry …
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Geochemical controls on the distribution and composition of biogenic and sedimentary carbon
… and to estimating the extent of life in the deep subsurface biosphere. This work utilizes bulk and spatially-resolved X-ray absorption spectroscopy to characterize the OC content and composition of various environmental systems in order to identify the role of minerals and surrounding geochemistry …
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Characterization of microbial primary and secondary metabolism in the marine realm
… consistent with a downcore reduction in subsurface biosphere diversity. Specific archaeal MAGs within the Thermoproteota and Hadarchaeota increased in abundance and recruitment of metatranscriptome reads towards deeper, hotter sediments, marking a transition to a specialized deep …
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Characterization of Microbial Primary and Secondary Metabolism in the Marine Realm
… consistent with a downcore reduction in subsurface biosphere diversity. Specific archaeal MAGs within the Thermoproteota and Hadarchaeota increased in abundance and recruitment of metatranscriptome reads towards deeper, hotter sediments, marking a transition to a specialized deep …
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Geochemistry of deep-sea hydrothermal vent fluids from the Mid-Cayman Rise, Caribbean Sea
… seafloor. At Piccard, extremely high temperature subsurface water/rock reaction results in high temperature fluids that are richer in dissolved H2 than any previously observed fluids worldwide. At both locations, high-H2 conditions promote the abiotic reduction of [Epsilon]CO2 to formate species, …
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The Mechanisms and Triggering of Earthquakes in the Ridge-Transform Environment
… provide insight into the plumbing supporting the subsurface biosphere.
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Quantification of total microbial biomass and metabolic activity in subsurface sediments
… communities are present in a wide range of subsurface environments. Techniques like enumeration of microbial cells, activity measurements with radiotracer assays and the analysis of porewater constituents are currently being used to explore the subsurface biosphere, alongside with molecular …