Estimated \textit{rrn} copy number for xylose and cellulose responders. The
leftmost panel contrasts estimated \textit{rrn} copy number for cellulose
(13CCPS) and xylose (13CXPS) responders. The right panel shows estimated
\textit{rrn} copy number versus time of first response for xylose responders.
Colors denote the phylum of the OTUs (see legend).

