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Depth profiles of Achromatium cells (a), redox-sensitive chemical species (Fe2+ and SO42−) (b), and relative abundance of the three main Achromatium lineages identified in a sediment core from Rydal Water (c). The trend lines show a three-point moving average of the data, and error bars represent 95% confidence intervals for counts of the Achromatium subpopulations.
