Figure 5

Venn diagram showing the distribution of unique OTUs and the number of shared OTUs (overlapped regions) between Fe-rich crust (site AMK79-6236), Fe-rich nodule (site PSh128.35) and Mn-rich nodule (site AMK79-6259); (a) comparison of three different Fe-Mn deposits; (b) pairwise comparison of the Fe-Mn deposits and their underlying sediments.