Fig. 2

Alpha-diversity of 16S rRNA gene sequences from the “heavy” and “light” fractions of DNA extracted from soils incubated with H₂¹⁸O in the presence (AB) or absence (CT) of antibiotics. Alpha-diversity is summarised as species richness (S), Shannon diversity (H), evenness (J), and Simpson (D). “*” corresponds to p-value < 0.05 from pairwise t-test; “**” corresponds to p-value < 0.01; “***” corresponds to p-value < 0.001; “NS.” corresponds to p-value > 0.05