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Phylogenetic Analysis of Particle-Attached and Free-Living Bacterial Communities in the Columbia River, Its Estuary, and the Adjacent Coastal Ocean
It is suggested that rapidly growing particle-attached bacteria develop into a uniquely adapted estuarine community and that free-living estuarist bacteria are similar to members of the river and the coastal ocean microbial communities. Expand
Hydrothermal vents and the origin of life
Submarine hydrothermal vents are geochemically reactive habitats that harbour rich microbial communities. There are striking parallels between the chemistry of the H2–CO2 redox couple that is presentExpand
A Serpentinite-Hosted Ecosystem: The Lost City Hydrothermal Field
The serpentinite-hosted Lost City hydrothermal field is a remarkable submarine ecosystem in which geological, chemical, and biological processes are intimately interlinked. Reactions between seawaterExpand
Volcanoes, Fluids, and Life at Mid-Ocean Ridge Spreading Centers
▪ Abstract The recent recognition of a potentially vast, unexplored hot microbial biosphere associated with active volcanism along the global mid-ocean ridge network has fundamentally shiftedExpand
Methane- and Sulfur-Metabolizing Microbial Communities Dominate the Lost City Hydrothermal Field Ecosystem
The finding of a diverse microbial ecosystem supported by the interaction of high-temperature, high-pH fluids resulting from serpentinization reactions in the subsurface provides insight into the biogeochemistry of what may be a pervasive process in ultramafic subseafloor environments. Expand
Incidence and Diversity of Microorganisms within the Walls of an Active Deep-Sea Sulfide Chimney
Observations of microbial communities within an active hydrothermal chimney provide insight into the microbial ecology within such structures and may facilitate follow-up exploration into expanding the known upper temperature limits of life. Expand
Microbial life in ridge flank crustal fluids.
Genetic signatures and enrichment cultures of microorganisms demonstrate that these crustal fluids host a microbial community composed of species indigenous to the subseafloor, including anaerobic thermophiles, and species from other deep-sea habitats, such as seawater and sediments. Expand
Dominance of particle-attached bacteria in the Columbia River estuary, USA
The hydrodynamics of the estuary contribute to the dominance of Pdrticle­ attached bacteria by extending the residence time of pdrticles in the ETM, and by quickly flushing free­ living cells through the estudry, perhaps preventing the development of an estudrine population of free-living bacterid. Expand
Temporal Changes in Archaeal Diversity and Chemistry in a Mid-Ocean Ridge Subseafloor Habitat
The temperature and chemical indicators of the degree of subseafloor mixing appear to be the most important environmental parameters affecting community diversity, and it is apparent that decreasing fluid temperatures correlated with increased entrainment of seaw water, decreased concentrations of hydrothermal chemical species, and increased incidence of seawater archaeal sequences. Expand
Closing the microbial loop: dissolved carbon pathway to heterotrophic bacteria from incomplete ingestion, digestion and absorption in animals
Abstract A new extension of digestion theory and re-interpretation of published empirical evidence suggest that the principal pathway of dissolved organic carbon (DOC) from phytoplankton to bacteriaExpand