Thermophilic and mesophilic sulfate reduction by rare biosphere bacteria in acidic metal-bearing mine wastes from the temperate climate zone.

ABSTRACT: Dissimilatory sulfate reduction is the main microbial process that detoxifies metals and increases pH in acid mine drainage. Acidophilic, copper-resistant Desulfosporosinus sp. BG and Desulfosporosinus sp. OT were previously isolated from acidic metalliferous tailings of the Bom-Gorkhon mine in Transbaikalia and Norilsk, respectively. To understand the role of sulfate-reducing bacteria (SRB) in mine tailings, we returned to the Bom-Gorkhon site to measure sulfate-reduction rate (SRR) with radioactive tracer and to estimate the proportion of SRB in the microbial community using 16 SrRNA gene profiling and metagenomic analysis. The SRR measured under ambient temperature conditions was high, reaching 9.86 ± 0.89 µmol SO₄ cm^- 3 day^- 1. Unexpectedly for a temper

SUBMITTER: Karnachuk OV 

PROVIDER: S-EPMC12739157 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature