Fig. 1: Soil microbial community composition, diversity, and indicator species for the kimberlite amendment experiment.

a Distribution of 16 S rRNA gene reads per phylum for each sample. The number of reads per phylum is calculated as a percentage of the total reads for each sample. The “other” grouping represents phyla that when summed contributed (on average across all samples) <5% of the total number of reads per sample. b A sunburst chart shows the average total relative abundance of bacterial and archaeal communities in control soils and kimberlite-amended soils. Rings are ordered as follows from inner to outer: Phyla, Classes, Orders, Families, and Genera. c Number of observed operational taxonomic units (OTUs; 97% sequence similarity) per sample at each timepoint, colored by sample treatment (from data that has been rarefied to 16365 sequences per sample). Median values are indicated by the solid line within each box, and the box extends to upper and lower quartile values. d Examples of OTU (species-level) changes across treatments, over time. Error bars represent standard deviation. e Hierarchical relationships amongst control and kimberlite treated soils based on Euclidean distance of 16S-OTU abundances. The hierarchical relationships between soil samples were obtained using the unweighted pair group method with the arithmetic mean (UPGMA) clustering algorithm. Node labels indicate the timepoint/treatment.