Fig. 1

Phyla of fungi and bacteria that were 13C-enriched in sand-filled ingrowth bags after a 13CO2 plant labelling experiment in a grassland soil. Each dot marks a single fungal OTU or bacterial ASV and represents the average excess atom fraction (EAF) with a 90% confidence interval. Bootstrap resampling was used to calculate the 90% confidence intervals (vertical bars) from the distribution of EAF estimates. Note that the OTU/ASVs shown include both significantly enriched and those with an enrichment confidence interval overlapping 0. * Indicates significantly enriched OTU/ASVs