#Database_OTU Count Abundance Taxonomy 4392640 2 0.666667 Archaea; Crenarchaeota; MCG; Unclassified; Unclassified; Unclassified; Unclassified; otu_4392640 2214064 1 0.333333 Bacteria; Proteobacteria; Deltaproteobacteria; Desulfarculales; Desulfarculaceae; Desulfatiglans; Unclassified; otu_2214064