3.5 Indicator groups of soil bacterial communities
A total of 33 phyla were found in the soil bacterial community of SF, PB, and CSF, of which 21 phyla (63.6%) were found to be common in all three, 22 phyla (66.63%) were found to be common in two of the three, 9 phyla (32.5%) were unique to SF, and neither PB nor CSF had unique phyla (Fig. 3B).
A total of 83 classes were found in the soil bacterial communities of SF, PB, and CSF, among which 48 classes (52.9%) were found to be common in the three. There were 50 classes (60.21%) common in SF and PB, 52 classes (62.62%) common in CSF and SF, 50 classes (60.21%) common in CSF and PB, 27 classes (32.5%) unique to SF, and neither PB nor CSF had a unique class (Fig. 3E).
A total of 276 families were found in the soil bacterial communities of SF, PB, and CSF, among which 146 families (52.9%) were found to be common in the three. There were 153 families (55.44%) common in SF and PB, 167 families (60.51%) common in CSF and SF, 161 families (58.33%) common in CSF and PB, 78 families (28.3%) unique to SF, 1 family (0.362%) unique to PB, and 8 families (2.9%) unique to CSF (Fig. 3I).
A total of 392 genera were found in the soil bacterial communities of SF, PB, and CSF, among which 183 genera (46.7% of the total genera) were found to be common in the three (Fig. 3C, F). There were 195 genera (49.76%) common in SF and PB, 221 genera (56.39%) common in CSF and SF, 208 genera (53.08%) common in CSF and PB, 115 genera (29.3%) unique to SF, 7 genera (1.79%) unique to PB, and 12 genera (3.06%) unique to CSF (Fig. 3L).
LEfSe analysis identified the indicator groups of soil bacterial communities for three types of sites (Fig. 4). Twenty-four indicator species of SF were identified, which belong to 2 phyla, 4 classes, 6 orders, 7 families, and 5 genera. Three indicator species of PB were identified, which belong to 1 order, 1 family, and 1 genus. Fifteen indicator species in CSF were identified, which belonged to 1 phylum, 2 classes, 1 order, 5 families, and 6 genera.