Figure 2.
Rarefaction curves (a) and nonmetric multidimentional scaling (NMDS) (b) of eight MD bacterial communities. The samples before pH adjustment are shown as “
” and after pH adjustment are represented by ‘
’. All the datasets were normalized to have the same number of reads (3034), and an operational taxonomic unit was defined to be no more than 3% distance within one unit. The stress of NMDS plot was set to be 0·1 at minimum to discern the position of all the samples. (
) Md13B; (
) Md23B; (
) Md40B; (
) Md82B; (
) Md103B; (
) Md110B; (
) Md172B and (
) Md20lB