Figure 2

Scores of the first two principal components of PLFA profile (a), contents of PLFA biomarkers for different microbial groups (b) and ratios of PLFA content between different microbial groups (c) in the four forests.
Columns and triangles represent average values and error bars give standard errors (n = 3). For each microbial group, different letters above bars indicate significant differences at P<0.05 level among forests. In the figure, G+ stands for Gram-positive bacterial PLFAs, G- for Gram-negative bacterial PLFAs, B for total bacterial PLFAs, A for actinomycetal PLFA and F for fungal PLFA. The abbreviations for the four forests are the same with that in Fig. 1.