Figure 5.

Redundancy analysis (RDA) for (a) soil microbial community components and carbon (C) composition; (b) microbial community components and P fractionation; (c, d) linkage of soil microbial community components and C and P; (e) enzyme activity and C composition; (f) enzyme activity and P fractionation; and (g, h) the linkage of soil enzyme activity and C and P in different wetland soil samples. Soil samples were collected from three areas of wetland: bare flat (BF) land, land invaded by Spartina alterniflora (SA), and land occupied by Phragmites australis (PA). Fitted site scores from BF, SA, and PA samples are displayed by circles, triangles, and squares, respectively. Affected factors are denoted as red arrows, and influencing factors are denoted by blue arrows.