Linear regression analysis of MBIC values plotted against physicochemical parameters for OSPW consortia.

<p>MBIC correlations with physicochemical parameters illustrate a typical metal susceptibility profile of the OSPW community. Parameters include: metal-sulfide solubility product (pK_sp), electronegativity (X_m), standard reduction-oxidation potentials (ΔE₀), Pearson’s softness index (σ_p), first ionization energy (<i>I</i>_<i>1</i>), and first hydrolysis constant (|Log K_OH|). Trend lines and 95% confidence bands (dashed lines) shown on linear regressions that correlate with significance.</p

Linear regression analysis of physicochemical parameters with metal toxicity values for OSPW cultures and <i>C</i>. <i>metallidurans</i>, represented as minimum inhibitory concentrations (MIC) and minimum biofilm inhibitory concentrations (MBIC).

<p>Linear regression analysis of physicochemical parameters with metal toxicity values for OSPW cultures and <i>C</i>. <i>metallidurans</i>, represented as minimum inhibitory concentrations (MIC) and minimum biofilm inhibitory concentrations (MBIC).</p

Planktonic minimal inhibitory concentrations plotted against pK_sp.

<p>Significant correlation is evident with the OSPW community (A), and absent with <i>C</i>. <i>metallidurans</i> (B). Dashed lines show 95% confidence bands.</p