Fig. 6

The individualized temporal propionate response to arabinoxylan associates with compositional responses in the fecal microbiota. Principal component analysis plots based on Euclidean distance comparing the relative abundance of fecal microbiota, both at baseline and arabinoxylan-induced shifts (ΔW6–baseline), between W6-responders (red) and W6-nonresponders (black). Microbiota variables (i.e., OTU or CARG) that contributed the most to inter-subject variation were shown as vectors on the plot when statistical significances were determined by PERMANOVA (p < 0.05). CARG co-abundance response group, OTU operational taxonomic unit, W1 week 1, W6 week 6