Skip to main content
. 2018 May 31;9:954. doi: 10.3389/fmicb.2018.00954

Table 2.

Correlation analysis between microbial community structures and environmental variables by Mantel testa.

environmental variables 16S rRNA
 ITS
 GeoChip
r P r P r P
All variables 0.215 0.015 0.179 0.034 0.107 0.099
Time 0.136 0.019 0.295 0.001 0.222 0.001
NO3--N 0.049 0.286 –0.023 0.563 –0.082 0.791
NH4+-N 0.054 0.261 0.164 0.047 –0.111 0.927
TN 0.022 0.371 0.109 0.125 –0.106 0.939
TOC 0.032 0.336 0.107 0.089 –0.124 0.970
Soil pH 0.150 0.026 0.044 0.283 0.138 0.047
Soil T 0.116 0.040 0.046 0.243 0.101 0.049
Soil W 0.002 0.474 0.110 0.102 0.084 0.139
C3 biomass 0.145 0.036 0.288 0.001 0.224 0.005
C4 biomass 0.024 0.359 0.097 0.111 –0.002 0.462
Total biomass 0.133 0.044 0.237 0.010 0.215 0.009
Plant richness –0.065 0.821 0.114 0.052 –0.038 0.679
Precipitation 0.042 0.190 0.091 0.037 0.201 0.002
HR 0.107 0.076 0.120 0.045 0.135 0.022
TR 0.100 0.163 –0.003 0.505 0.053 0.263

aThe significant value (P < 0.10) are indicated in bold. NO3--N, soil nitrate-nitrogen; NH4+-N, soil ammonium nitrogen; TN, soil total nitrogen; TOC, soil total organic carbon; soil W, soil water content; soil T, soil temperature; HR, soil heterotrophic respiration; AR, soil autotrophic respiration; TR, soil total respiration.