Fig. 5 Redundancy analysis (RDA) of leaf stoichiometry and RDA of the soils and plants.
A: Variations in soil and leaf stoichiometry andP. kansuensis coverage. Richness was partitioned among two explanatory variable groups (soil and plants) using a partial regression analysis with an RDA. B: Variation-partitioning analysis produced four fractions: single effect of soil, single effect of plants, joint effects of soil and plants, and unexplained variation. ΔSW, The value of soil water content from treatment minus control; ΔSN, The value of soil nitrogen content from treatment minus control; ΔSP, The value of soil phosphorus content from treatment minus control; ΔSK, The value of soil potassium content from treatment minus control; ΔRichness, The value of richness from treatment minus control; LN, Leaf nitrogen content; LP, Leaf phosphorus content; LK, Leaf potassium content; LN:LP, Ratio of leaf nitrogen content to leaf phosphorus content; LN:LK, Ratio of leaf nitrogen content to leaf potassium content; LP:LK, Ratio of leaf phosphorus content to leaf potassium content; CP, Coverage of P. kansuensis .