The asymptotic taxonomic richness across the tree of life
A) Family richness accumulation curve as a function of sequencing depth in billions of unique paired-end reads. The solid and dotted lines represent the rarefaction curve of observed richness and the statistical extrapolation with 95% confidence intervals, respectively. B) Estimates of asymptotic richness estimates for various domains, kingdoms, phyla, and classes across the tree of life. The estimates are rounded off to the nearest integer and the error bars indicate the standard error of the estimates.