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Time course changes in pH values (top) and redox potentials (bottom) in mine tailings mesocosms inoculated with different populations of acidophilic microorganisms. TI, no inoculum (control); TII, TI plus Fe(II) oxidizers; TIII, TII plus Fe(III) reducers; TIV, TIII plus SRB; TV, TIV plus algae. For each treatment data set, bars not annotated with the same letter are significantly different (95% confidence limit). Error bars represent standard deviations.
