Fig. 6

Alpha and Beta diversity. A Alpha diversity was assessed using observed richness and the Shannon H′ diversity index. Data are shown as boxplots (4 or 3 replicates per treatment). P-values indicate significant difference between treatments, * P < 0.05, ** P < 0.01. B Beta diversity was visualised using Principal Coordinates Analysis (PCoA), based on Bray Curtis distance and log-transformed data. Significant differences were detected between the CV and VH10 treatment, and CV and CF treatment, respectively (P < 0.05) (data available in Additional file 1: Fig. S4)