Taxon abundance is strongly correlated across sequencing runs with different levels of PCR replication.

<p>Circles represent individual taxa, and the relationship between the log₁₀ of their abundance in samples comprised of 16 PCR replicates (y axis) and one PCR replicate (x axis) for CT2 (top two panels), OR1 (middle two panels), and OR4 (bottom two panels). Dashed lines represent a 1∶1 relationship. The left three panels show samples sequenced with 454 and the right three panels show samples sequenced with Illumina MiSeq.