Habitat context and geothermal site characteristics.

Site photographs and scanning electron micrographs (SEM) of microbial mats and solid phases associated with each geothermal sample used for metagenome sequencing (map of Yellowstone National Park and site locations shown in top left panel). A. Crater Hills (CH, gold); B. Norris Geyser Basin (NGB, red); C. Joseph's Coat Hot Springs (JCHS, blue); D. Mammoth Hot Springs (MHS, green). E. Calcite Springs (CS, violet).



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