Figure 6. The tipping elements co-occur in various combinations.

The bimodal groups (rows) co-occur in various combinations within the study population. Shading indicates the relative abundance (log₁₀) for each group with respect to the identified tipping point between the alternative states of low (blue) and high (red) abundance. The 1,006 subjects are ordered based on the combination frequencies (top row). The most frequent combination (18%) corresponds to the high-abundance state of the UCI, UCII and B. fragilis groups combined with the low-abundance state of the Dialister spp. and Prevotella groups.