Fig. S8 . Effects of nitrogen addition and mowing on the biomass resistance (B rst) and recovery (B rc) of four other dominant species (C. duriuscula, C. squarrosa , B. scorzonerifolium and S.baicalensis ) experiencing drought in three consecutive growing seasons. Bars indicate means ± SE. Different letters above or below the bars indicate significant differences (P < 0.05) among treatments. C: control; N: nitrogen addition; M: mowing; NM: nitrogen addition plus mowing.