Fig. 2. Drought effects on microbial community composition assessed by amplicon sequencing.
Colour indicates soil treatment (control = grey, 1 year = light blue, 10 years = blue). On top, graph NMDS representing archaea/bacteria, fungi and AMF (arbuscular mycorrhizal fungi). All the NMDS plots show the similar patterns, with an effect of drought (respectively, p = 0.014, p = 0.01, p = 0.015; PERMANOVA results, n = 4) and with a clear separation of the 10-year treatment from 1 year and control. The bottom graphs show results from the differential abundance analysis for control vs 1 year (top row) and control vs 10 years (bottom row). Circles in red represent taxa that had a significant differential abundance compared to the control, while in grey taxa that were not significant. Similarly to the NMDS plots, control vs 1 year results show little difference (only in the fungal community of Basidiomycota), while control vs 10 years shows strong differences at all levels (most affected groups being: Acidobacteria, Actinobacteria, Proteobacteria, Ascomycota, Basidiomycota, Diversisporales and Glomerales).