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. 2020 Jan 16;15(1):e0227434. doi: 10.1371/journal.pone.0227434

Fig 9. Alpha-diversity measures after downstream filtering of very low-abundance OTUs/ASVs.

Fig 9

X-axis shows the no. of counts that an OTU/ASV must reach (in the entire dataset) in order to be retained. All OTU/ASV tables rarefied to 10000 counts / sample prior to filtering. Values shown are averaged across all samples in the HELIUS fecal sample dataset. A) Sample richness. B) Shannon index. The blue vertical bar marks the filter threshold corresponding to 0.002% of rarefied counts.