Taxonomic composition of the ¹³C labelled microbial communities.

Relative abundance of class level taxonomic groups in the heavy DNA fraction of DNA from 13C labelled microcosms is shown. For each treatment, DNA samples of 13C triplicates were combined before ultracentrifugation and Illumina MiSeq amplicon sequencing of bacterial 16S rRNA genes. Only OTUs found to be significantly enriched in the heavy fraction of the 13C sample compared to the 12C sample are shown.