Fig. 3From: Earthworms and rice straw enhanced soil bacterial diversity and promoted the degradation of phenanthreneA Venn diagram displaying the degree of intersection of bacterial OTUs clustered at 97% sequence similarity among the different treatments. Different samples display different color, number in the diagram represents the shared or unique OTU number. Overlap region represents shared OTU number, while non-overlap region represents unique OTU number. The OTUs differed among the four treatments and their numbers were 5740 (P), 6186 (PS), 6847 (PW) and 7067 (PSW). P is the control treatment (none straw neither earthworms), PS is treatment with rice straw, PW is the treatment with earthworms and PSW is the treatments with both rice straw and earthwormsBack to article page