Redundancy Analysis (RDA) of the PLFA data for the 30 soil samples, using 6 PLFAs as species and 6 environmental variables.

<p>The arrows indicate the lengths and angles between explanatory and response variables and reflect their correlations. The red lines, blue lines and cycles represent the environmental variables, microbial groups and soil samples, respectively. DOC, dissolved organic carbon, AMF, arbuscular mycorrhizal fungal, GP, gram-positive bacterial, GN, gram-negative bacterial.