Appendix A. Supplementary data
Table S1. Basic physical and chemical properties of soil
Fig. S1 Soil sampling sites across the Jinchuan Forest Farm (42°20’N, 126°24’E) in Huinan County, southwest of Changbai Mountain in China
Fig. S2 Microbial biomarkers and predicted functional profiles of microbes under different stand ages in the L. gmeliniiplantations. Top 24 fungal OTUs and 42 bacterial OTUs were identified using random-forest classification of the relative abundance of all OTUs. Heatmap of the relative abundance of biomarker families in the individual samples. Differences in biomarker functions in the FUNGuild and FAPROTAX database under different stand ages. Sap: Saprotroph; Sym: Symbiotroph; Pat: Pathotroph; ACD: aromatic compound degradation; ANO: aerobic nitrite oxidation; AAO: aerobic ammonia oxidation; Nit: nitrification; SR: sulfate respiration; AC: aerobic chemoheterotrophy
Fig. S3 Relationships between DOC, FI, HIX, and microbial diversity based on linear regression analysis. r and associated P values in each model are shown on the figure. (a), (b), (c): Bacteria richness. (d), (e), (f): Fungi richness.