22-y	22-year-old stand
35-y	35-year-old stand
45-y	45-year-old stand
55-y	55-year-old stand
CK	control
DBH	diameter at breast height
OTUs	Operational taxonomic units
RDP	Ribosomal Database Project
SOC	Soil organic carbon
TN	Total nitrogen
TP	Total phosphorus
TK	Total potassium
AP	Available phosphorus
AK	Available potassium
${\mathrm{NH}}_4^{+}$-H	Ammonium-N
${\mathrm{NO}}_3^{-}$-H	Nitrate-N
HSD	Honestly significant difference
NMDS	Non-metric multidimensional scaling
ANOSIM	Analysis of similarities
PERMANOVA	Permutation multivariate analysis of variance
RDA	Redundancy analysis
APL	Average path length
MD	Modularity
ACC	Average clustering coefficient
BC	Betweenness centrality