Fold-change comparisons (Fv+SM1/SM1) of microbial absolute abundances. Data points represent pairwise comparisons between bioreactors at different time points (days 7, 10, 13, 16, and 19). Only strains with 8/15 valid pairwise comparisons are shown. Mean fold-change is indicated by red diamonds. Data points are colored by time point, with the lightest blue corresponding to day 7 and the darkest blue corresponding to day 19.