Fig. 3. Discriminatory OTUs and measures of the diffusion tensor can both predict animal diet.

Predictive modeling with Random Forest with leave-one-out cross-validation identified nine features from both the gut microbiome and from experimentally measured diffusion tensor values that were able to predict the diet of the animal with 100% and 95% accuracy, respectively. Hierarchically clustered heatmaps for discriminatory elements and their relationship to diet are shown here for identified OTUs (a) and for identified diffusion tensor measurements (b)