## 4 Discussion
These two phyla were abundant in the rhizosphere soil of _P. yunnanensis_ and grassland plots. _Planctomycetes_ represented a small minority of aquatic bacteria found in seawater and freshwater environments [67; 68]. However, the dry season occurs in central Yunnan, China from November to April [69], and _P. yunnanensis_ exhibits drought tolerance [70], which may explain why _Planctomycetes_ was present in soils linked to _P. yunnanensis_ in study areas. According to the rhizosphere bacterial communities of _Y. yunnanensis_ reported in other regions of Yunnan Province where phosphorus is deficient, the dominant bacterial taxa are _Acitinobacteria_, _Alphaproteobacteria_, and _Acidobacteria_, whereas _Verrucomicrobia_ and _Planctomycetes_ were found in low abundance [71]. In addition to the plants reported in this study, phosphorus also alters bacterial community composition in soybean rhizosphere soils, and phosphorus fertilization decreased the relative abundance of _Bacillus_ and _Pseudomonasales_[72]. Plant root exudates also shape rhizosphere bacterial structures [73; 74; 75]. Previous studies about phosphorus-enriched soils have concluded that phytoremediation is an effective measure for nutrient (nitrogen and phosphorus) removal [17; 76]. Fewer studies, however, has been focused on the biodiversity of soil microbial communities based on vegetation regeneration. This study showed that bacterial communities in PES are strongly influenced by the rhizosphere of different plant species and physicochemical soil parameters. The distribution of soil bacteria was affected by multiple environmental factors. Soil macro-environmental conditions, such as soil water content, has the most notable impacts on the distribution of bacteria, followed by soil organic matter and total nitrogen. Although phosphate content was high in PES, total phosphorus was found to have the lowest impact as compared with other nutrient factors on bacterial communities. The findings of this study verified the results of a previous study on low nitrogen levels in the region [19]. On a larger scale, in the phosphorus-rich and nitrogen-deficient environments of PES, most vegetation is secondary, and habitats are relatively fragile. _E. rufipilus, C. nepalensis_, and _P. yunnanensis_ are widely grown in phosphorus-enriched soils of China because of their high tolerance to drought and arid conditions. The _P. yunnanensis_ plant communities have higher plant diversity in PES, whereas bacterial communities tend to feature lower diversity under the forest soil of _P. yunnanensis_. Higher plant diversity and lower litter decomposition efficiency [77], as well as litter inhibitory effect on bacterial communities such as production of tannin [78] occurring under _P. yunnanensis_ as compared with _E. rufipilus_ and _C. nepalensis_ likely explains this lower level of diversity. In addition, _P. yunnanensis_ is a common native secondary coniferous species growing in low temperatures. Because of its rapid growth and higher plant community diversity beneath trees, it is a preferred species in Yunnan [37]. On the basis of the above findings, follow-up research in plant rhizosphere microbial compositions, and diversity could be fruitful. Nutrient properties and microbial communities can provide guidance for understanding biochemical processes and ecosystem functionalities in the soils of phosphorus-rich mountains.