Susan Fishbain, Jesse G. Dillon, Heidi L. Gough, and David A. Stahl Applied and Environmental Microbiology, 2003 69:3663-3667
Abstract: Diversity, habitat range, and activities of sulfate-reducing prokaryotes within hot springs in Yellowstone
National Park were characterized using endogenous activity measurements, molecular characterization, and
enrichment. Five major phylogenetic groups were identified using PCR amplification of the dissimilatory
sulfite reductase genes (dsrAB) from springs demonstrating significant sulfate reduction rates, including a
warm, acidic (pH 2.5) stream and several nearly neutral hot springs with temperatures reaching 89°C. Three
of these sequence groups were unrelated to named lineages, suggesting that the diversity and habitat range of
sulfate-reducing prokaryotes exceeds that now represented in culture.