Figure 2.
Heat-map showing spatial distributions of 188 bacterial OTUs (species) with at least 10−3 relative abundance per subject. Individual cells are color-coded according to Z-scores to show the normalized abundance of a particular OTU in one site relative to the mean abundance across all seven sites. The relative intensity of the colors indicates how many standard deviations the observed OTU abundance is above or below the mean. All 188 OTUs belong to seven bacterial phyla, mapped left of the heatmap from top to bottom, including Firmicutes, Actinobacteria, Deinococcus-Thermus, Proteobacteria, TM, Fusobacteria and Bacteroidetes. TI, terminal ileum; IV, ileocecal valve; AC, ascending colon; TC, transverse colon; DC, descending colon; SC, sigmoid colon; R, rectum. Note: Heat-map was generated using R.