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Filtering by: Creator Colwell, Frederick Remove constraint Creator: Colwell, Frederick Advisor Colwell, Frederick S. Remove constraint Advisor: Colwell, Frederick S. Resource Type Dissertation Remove constraint Resource Type: Dissertation

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  • Characterizing drivers of microbial community structure and function in diverse marine sediments

    Creator:
    Graw, Michael F.
    Abstract:
    Marine sediments are one of the largest habitats for microbial life on earth. These microorganisms play critical roles in biogeochemical cycling both within the subsurface and between the sediment and water columns. However, microbial communities in sediments are highly heterogeneous and the factors defining microbial community structure and metabolic function...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ Frederick S. Colwell Marine sediments are one of the largest habitats for microbial

  • Geomicrobiology of marine sediment containing methane

    Creator:
    Briggs, Brandon R.
    Abstract:
    Marine sediments contain an abundance of methane that is biologically produced and plays a significant role in the global carbon cycle. Microbes responsible for the carbon cycle in marine sediments, and the processes that they carry out, need to be characterized in order to fully understand the role of this...
    Resource Type:
    Dissertation
    Full Text:
    approved: Frederick S. Colwell Marine sediments contain an abundance of methane that is

  • Establishment and dynamics of methane-oxidizing microbial communities in marine sediments

    Creator:
    Klasek, Scott A.
    Abstract:
    Marine sediments are vast sources and reservoirs of methane, a potent greenhouse gas. Most of this methane is anaerobically oxidized by archaea before it can reach the overlying ocean, though the efficiency of this process often depends on methane fluxes and mechanisms of fluid transport. Anaerobic methanotrophic archaea, or ANME,...
    Resource Type:
    Dissertation
    Full Text:
    : ____________________________________________________________ Frederick S. Colwell Abstract Marine sediments are vast sources and reservoirs of methane

  • Biogeochemical Processing of Freshwater Carbon in the Anthropocene

    Creator:
    Buser, Jessica Z.
    Abstract:
    Freshwater systems cycle carbon along a spatial and temporal biogeochemical continuum, across which ecosystem processes contribute to transformations of organic matter (OM). Various ecological constraints impact rates OM transformation and production and consumption of the energetic end of respiration, methane. Microbiological processing and complete reduction of carbon substrates to methane...
    Resource Type:
    Dissertation
    Full Text:
    Anthropocene Abstract approved: ______________________________________________________ Frederick S

  • Impact of Igneous Mineralogy on the Composition and Metabolic Function of Microbial Biofilms in a Thermal Suboceanic Crustal Aquifer

    Creator:
    Smith, Amy R.
    Abstract:
    Igneous oceanic crust encompasses ~60% of Earth’s surface and is composed of basalt glass and mafic, ultramafic, and felsic minerals. A vast marine aquifer lies within the crust, exchanging geochemically altered fluids with seawater from the overlying ocean at ridge crests, flanks, seamounts, and outcrops where permeable crust is exposed....
    Resource Type:
    Dissertation
    Full Text:
    . Abstract approved: _____________________________________________________ Frederick S. Colwell Martin R