Fig. 2From: Linkage of microbial living communities and residues to soil organic carbon accumulation along a forest restoration gradient in southern ChinaVariations of the total PLFAs content (panel A), the ratio of fungal to bacterial PLFAs (F:B, panel B) following forest restoration. Different uppercase and lowercase letters indicate significant differences in topsoil (grey bar) or subsoil (white bar) between the four restoration stages at the P < 0.05 level. Bars represent means ± SE (n = 6)Back to article page