Fig. 3

Differences in microbiota composition between FD, tumor, and adjacent non-tumor tissues and between tumors with gastric, intestinal, mixed, and null mucin phenotypes. A Mean relative abundance of phyla in all tissue types (FD, tumor, and adjacent non-tumor samples; n = 8, 83, and 80, respectively) and in each mucin phenotype group assigned to the gastric tumor samples (gastric, intestinal, mixed, and null; n = 12, 15, 41, and 14, respectively). B Boxplots of four common alpha-diversity indices (i.e., chao1, inverse Simpson, observed richness, and Shannon index) for FD, tumor, and adjacent non-tumor tissues (n = 8, 83, and 80, respectively) as well as for tumors with gastric, intestinal, mixed, and null mucin phenotypes (n = 12, 15, 41, and 14, respectively). C PCoA using the Bray–Curtis (left) and weighted unifrac (right) distance measures for FD, tumor, and adjacent non-tumor tissue samples (n = 8, 83, and 80, respectively). The points were colored according to the mucin phenotype assigned to each tumor. The percentage of variance captured by the axes and the 95% confidence intervals per mucin phenotype (drawn as ellipses) are also shown