• Publications
  • Influence
Diversity, Abundance, and Potential Activity of Nitrifying and Nitrate-Reducing Microbial Assemblages in a Subglacial Ecosystem †
ABSTRACT Subglacial sediments sampled from beneath Robertson Glacier (RG), Alberta, Canada, were shown to harbor diverse assemblages of potential nitrifiers, nitrate reducers, and diazotrophs, asExpand
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Reaction path modeling of enhanced in situ CO2 mineralization for carbon sequestration in the peridotite of the Samail Ophiolite, Sultanate of Oman
The peridotite section of the Samail Ophiolite in the Sultanate of Oman offers insight into the feasibility of mineral carbonation for engineered, in situ geological CO2 storage in mantleExpand
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  • Open Access
Chemolithotrophic Primary Production in a Subglacial Ecosystem
ABSTRACT Glacial comminution of bedrock generates fresh mineral surfaces capable of sustaining chemotrophic microbial communities under the dark conditions that pervade subglacial habitats.Expand
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  • Open Access
Hydrothermal ecotones and streamer biofilm communities in the Lower Geyser Basin, Yellowstone National Park.
In Yellowstone National Park, a small percentage of thermal features support streamer biofilm communities (SBCs), but their growth criteria are poorly understood. This study investigates biofilms inExpand
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The transition to microbial photosynthesis in hot spring ecosystems
Abstract Even casual observations of continental hot springs reveal that photosynthesis has its limits. In an effort to explore the transition to photosynthesis, field measurements of temperature andExpand
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Coordinating Environmental Genomics and Geochemistry Reveals Metabolic Transitions in a Hot Spring Ecosystem
We have constructed a conceptual model of biogeochemical cycles and metabolic and microbial community shifts within a hot spring ecosystem via coordinated analysis of the “Bison Pool” (BP)Expand
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  • Open Access
Measurement of atmospheric ammonia at a dairy using differential optical absorption spectroscopy in the mid-ultraviolet
Abstract Ammonia is the most abundant basic gas in the atmosphere, and after N2 and N2O is the most abundant nitrogen-containing specie (Seinfeld and Pandis, 1998. Atmospheric Chemistry and Physics:Expand
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Merging isotopes and community genomics in a siliceous sinter‐depositing hot spring
[1] Thermophilic microbes in hydrothermal ecosystems have multiple metabolic strategies for taking up carbon and nitrogen, which may result in distinct stable isotopic compositions of C and N inExpand
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Competition for Ammonia Influences the Structure of Chemotrophic Communities in Geothermal Springs
ABSTRACT Source waters sampled from Perpetual Spouter hot spring (pH 7.03, 86.4°C), Yellowstone National Park, WY, have low concentrations of total ammonia, nitrite, and nitrate, suggesting nitrogenExpand
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The behavior of biologically important trace elements across the oxic/euxinic transition of meromictic Fayetteville Green Lake, New York, USA
Abstract Trace elements are central components of enzymes that catalyze many of the essential reactions mediated by life. The redox sensitive nature of trace elements also permits their use as aExpand
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