Fig. 9From: Enrichment of syngas-converting mixed microbial consortia for ethanol production and thermodynamics-based design of enrichment strategiesa Dependence of alpha diversity (measured as number of unique OTUs) on pH for all enrichment samples. NA corresponds to samples from the starting inocula. b Non-metric multidimensional scaling (nMDS) unconstrained ordination. The arrows represent the direction and strength of the correlation between the variables and the unconstrained ordination of samples. The label of the samples is encoded according to the enrichment series name and transfer numberBack to article page