Relative abundances of bacterial and eukaryotic taxa in the five datasets.

<p>a, relative abundance of bacterial taxa at phylum level; b, relative abundance of representative eukaryotic taxa at the fourth rank. ‘Other phyla’ or ‘Other’, includes taxa that made up of small fractions (<1%). ‘Unclassified’, includes sequences under a bootstrap cut-off value of 50% for bacteria or 80% for eukaryota. Explanations of abbreviations are given in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0186161#pone.0186161.t001" target="_blank">Table 1</a>.