Fig. 3From: Bioconversion of coal to methane by microbial communities from soil and from an opencast mine in the Xilingol grassland of northeast ChinaRelative abundance of 16S rRNA gene sequences in coal and soil samples at the phylum level from Illumina HiSeq sequencing for bacteria (a) and archaea (b). The phylum that constituted more than 1% of the bacterial and archaeal communities are shown in the figures. CS covering soil, SS surrounding soilBack to article page