Based on the study’s results, we found that the abundance of aerobic, anaerobic and parthenogenetic anaerobic bacteria showed an increasing trend at wetland restoration from the corn field (Corn) to the natural wetland (NW) ( Figure 10 ; Supplementary Table S7 , p < 0.05).
Proteobacteria occupies the highest proportion in the four different restoration stages, but showed a decreasing trend from the corn field stage (Corn) to the natural wetland stage (NW) ( Supplementary Table S3 , p < 0.05).
The Mantel test analyses revealed that AP has a highly significant impact on the bacterial community, while AN also has a significant impact on the bacterial community ( Figure 8A , p < 0.05).