Journal
SCIENCE
Volume 287, Issue 5459, Pages 1796-1799Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.287.5459.1796
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A new species of Archaea grows at pH similar to 0.5 and similar to 40 degrees C in slime streamers and attached to pyrite surfaces at a sulfide ore body, Iron Mountain, California. This iron-oxidizing Archaeon is capable of growth at pH 0. This species represents a dominant prokaryote in the environment studied (slimes and sediments) and constituted up to 85% of the microbial community when solution concentrations were high (conductivity of 100 to 160 millisiemens per centimeter). The presence of this and other closely related Thermoplasmales suggests that these acidophiles are important contributors to acid mine drainage and may substantially impact iron and sulfur cycles.
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