Research Projects Listed below are current and past projects that provide a flavor of the kind of work conducted in the Sievert lab: The Role of Sulfur Oxidizing Bacteria in Salt Marsh C and N Cycling An Integrated Study of Energy Metabolism, Carbon Fixation, and Colonization Mechanisms in Chemosynthetic Microbial Communities at Deep-Sea Vents In Situ Measurement of Rates of Chemoautotrophic Carbon Production at Deep-Sea Hydrothermal Vents Metabolic Rates and Growth Efficiency across Redox and Thermal Gradients: An Experimental Study to Constrain Biomass Production at Vents Autotrophic Carbon Fixation at a Shallow-water Hydrothermal System: Constraining Microbial Activity, Isotopic and Geochemical Regimes Shedding Light on the Dark: Single-Cell Genomics of Uncultivated Epsilonproteobacteria Inhabiting the Sub-Seafloor at Deep-Sea Hydrothermal Vents Microbiology and Biogeochemistry of Autotrophic Microbes in the Subsurface at Hydrothermal Vents: Filamentous-Sulfur Producing Bacteria Exploring integrative approaches to understand the interaction of microbial biofilms and fluid chemistry on larval settlement at deep-sea hydrothermal vents Integration of Deep Ocean Benthic Sampler Technology with Microbial Biogeochemistry of Methane Seeps and Isolation of Piezophilic Deep-Sea Sediment Microbes Abundance, diversity, and activity of anaerobic propane- and butane-oxidizing microorganisms at a hydrothermal hydrocarbon seep The genome of the epsilonproteobacterial chemolithoautotroph Sulfurimonas denitrificans