Qu Mengjun, Wang Jianming, Wang Yin, Zou Xuge, Lei Xun, Luo Meiwen, Wang Wenkai, Li Jingwen
School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China.
State Key Laboratory of Efficient Production of Forest Resources, Beijing Forestry University, Beijing 100083, China.
Microorganisms. 2025 Jul 25;13(8):1742. doi: 10.3390/microorganisms13081742.
AM fungi play a pivotal role in regulating ecosystem functioning and processes. However, the assembly of soil AM fungal communities and its drivers across forests in extremely arid regions remain largely unclear. Here, we explored the composition and assembly processes of AM fungal communities in the soil of forests in northwest China. The results showed that soil salinity affected the composition, assembly processes, and network stability and complexity of AM fungal communities. Stochastic processes rather than deterministic processes dominated the community assembly of AM fungi. Habitat generalists were more susceptible to deterministic processes than specialists. In addition, the network analysis showed that fungal network complexity had a hump-shaped relationship with increasing soil salinity, while network stability had a U-shaped relationship. This research suggests that soil salinity plays an essential role in determining AM fungal community composition and assembly processes in forests of arid regions.
丛枝菌根真菌在调节生态系统功能和过程中起着关键作用。然而，极端干旱地区森林土壤丛枝菌根真菌群落的组装及其驱动因素仍不清楚。在此，我们探究了中国西北森林土壤中丛枝菌根真菌群落的组成和组装过程。结果表明，土壤盐分影响了丛枝菌根真菌群落的组成、组装过程以及网络稳定性和复杂性。随机过程而非确定性过程主导了丛枝菌根真菌的群落组装。与专性物种相比，广适性物种更容易受到确定性过程的影响。此外，网络分析表明，真菌网络复杂性与土壤盐分增加呈驼峰状关系，而网络稳定性与土壤盐分呈U形关系。本研究表明，土壤盐分在决定干旱地区森林丛枝菌根真菌群落组成和组装过程中起着重要作用。
