The number of reads, average length of the reads and the number of chimeras.

<p>The number of reads and average length of the reads after the initial quality filtering and after all quality control steps as well as the number of chimeras with the different bioinformatic strategies.</p><p>^aAfter alignment</p><p>^bCalculated when calling OTUs at the 100% level</p><p>The number of reads, average length of the reads and the number of chimeras.