Environmental Engineering Reference
In-Depth Information
phylum (0.20 phylogenetic distance) level has begun to reach a horizontal plateau. The other
sampling at the taxonomic ranks was still projecting upward (Figure 10 and Table 2).
At the species (0.03 phylogenetic distance) level, only 41% of the expected diversity has
been revealed. The estimates of current coverage suggest that those of Bacteria were less than
that of Actinobacteria, Bacteroidetes and Firmicutes, greater than that of Acidobacteria. The
coverage rate of Proteobacteria was similar with that of the Bacteria. For the archaea, the
coverage of diversity was greater than bacteria, but still low compared to estimated richness.
Figure 10. Rarefaction curve for the Archaea (a) and Bacteria (b) with different dissimilarity cut-off.
