. An OTU was counted present if it was detected in at least two of three sample replicates, except for the \[C0mim\]Cl samples, for which the three replicates were pooled together (see [Methods](#s0){ref-type="sec"} and [Results](#s0){ref-type="sec"}).](pone.0000000.g000){#pone-0000000-g000}  Comparison of the microbial 