3.4 | Biotic and abiotic drivers for microbial
community composition
In general, all examined biotic and abiotic variables, except for soil
total phosphorus and soil pH, affected the composition of bacterial or
fungal communities in both regions (Figure 5a). Moreover, among six
variables with low collinearity, the rhizosphere bacterial composition
was mainly affected by root total nitrogen and soil total nitrogen,
whereas that in non-rhizosphere by soil available phosphorus (Figure 5b,
c). In addition, soil available phosphorus was consistently the primary
variable affecting the fungal composition in both rhizosphere and
non-rhizosphere
(Figure 5d, e).