Figure captions
FIGURE 1 Soil properties during the forest succession process. Different letters indicate significant differences (p <0.05), and the error bars represent the standard error. TC, total carbon; SOC, soil organic carbon; TP, total phosphorus; TK, total potassium; TN, total nitrogen; NH4+, ammonium nitrogen; NO3-, nitrate nitrogen; AP, available phosphorus; AK, available potassium.
FIGURE 2 Fungal community richness (A), a-diversity (B), and evenness (C) during the forest succession process.
FIGURE 3 The composition and differences of fungal communities at the phylum (A, C) and genus levels (B, D) during forest succession.
FIGURE 4 Non-metric multidimensional scaling (NMDS) of fungal community composition between different successional stages (A) and different forest types (B).
FIGURE 5 Bar chart showing the significantly different functional guilds during the forest succession.
FIGURE 6 Redundancy analysis (RDA) biplot integrating soil nutrients under different successional stages. (A) Parameters represented by longer arrows made a stronger contribution to group separation; red arrows represent a significant effect; black arrows represent no significant effect. (B) Double matrix correlation heatmap of differential fungal functional guilds and environmental factors with a significant difference. The color key represents the range of different R values. Red represents positive correlation, and blue represents negative correlation. *, **, and *** indicate significant differences at 0.01 < p < 0.05, 0.001 < p < 0.01, and p < 0.00. TC, total carbon; SOC, soil organic carbon; TP, total phosphorus; TK, total potassium; TN, total nitrogen; NH4+-N, ammonium nitrogen; NO3-N, nitrate nitrogen; AP, available phosphorus; AK, available potassium.
FIGURE S1 Trophic modes of fungal functional groups during the forest succession.