Fig. 3. Isolate contributions to SOM functional pools.

Contributions are presented as total uncorrected values (lefthand Y-axis) and corrected values (righthand Y-axis), which were calculated as the difference between inoculated (fungal) and sterile control samples (n = 4, except P. stipticus, n = 3). Corrected values for total C are negative, as the sterile control samples contained higher C concentrations than the inoculated samples, due to the absence of respiratory CO₂ losses. Colors represent fungal species (carried throughout figures). Boxplots represent 25th and 75th percentile, median and outlying points. Whiskers extend from minimum to maximum values (no further than 1.5x the inter-quartile range). Results (p-values) of one-way ANOVA or Kruskal-Wallis tests are presented for each SOM functional pool (all P < 0.05). Source data are provided as a supplementary Source Data file.