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Aims <p>The nutrient cycling mediated by soil microorganisms is crucial for maintaining forest ecosystems' stability and sustainable development. However, a comprehensive understanding of how microbial community assembly processes affect multiple nutrient cycling (MNC) remains unclear.</p> Methods <p>In this study, rhizosphere soils were collected from different seedling ages (2-, 3-, and 6-year-old) under varying canopy densities, including forest gap (FG), forest edge (FE), medium canopy density 0.4–0.6 (MCD), and high canopy density 0.7–0.9 (HCD). The aims were to evaluate changes in MNC, the assembly processes of bacterial and fungal communities, and the main factors influencing MNC during early succession.</p> Results <p>The results demonstrated that MNC indices in FG and FE were significantly higher than those in MCD and HCD (<i>P</i> &lt; 0.05). Moreover, stochastic processes dominated the bacterial community, while deterministic processes dominated the fungal community during the early succession of the secondary forest. Co-occurrence networks suggested that the bacterial community was more complex in HCD, whereas the fungal community exhibited greater complexity in FG. Random forest (RF) indicated that soil organic carbon (SOC) and total phosphorus (TP) were the primary nutrient predictors, and structural equation modeling (SEM) suggested that microbial community assembly processes were also the main indicators affecting MNC. Specifically, the assembly processes of the bacterial community (stochastic processes) were positively correlated with MNC, while those of the fungal community (deterministic processes) showed a negative correlation with MNC.</p> Conclusions <p>Overall, the bacterial and fungal communities exhibited distinct assembly processes in early succession, with different effects on MNC. The findings enhanced our understanding of the potential links between soil microbial communities and multiple nutrient cycling.</p>

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Microbial community assembly processes affect multiple nutrient cycling during the early succession of a secondary forest

  • 期刊论文

  • 发表日期：

    2026年7月23日

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  • Wenju Chen,
  • Xueying Huo,
  • Yuchao Zhi,
  • Ying Yang,
  • Wenchao Gao,
  • Runqin Wu,
  • Dexiang Wang

摘要

Aims

The nutrient cycling mediated by soil microorganisms is crucial for maintaining forest ecosystems' stability and sustainable development. However, a comprehensive understanding of how microbial community assembly processes affect multiple nutrient cycling (MNC) remains unclear.

Methods

In this study, rhizosphere soils were collected from different seedling ages (2-, 3-, and 6-year-old) under varying canopy densities, including forest gap (FG), forest edge (FE), medium canopy density 0.4–0.6 (MCD), and high canopy density 0.7–0.9 (HCD). The aims were to evaluate changes in MNC, the assembly processes of bacterial and fungal communities, and the main factors influencing MNC during early succession.

Results

The results demonstrated that MNC indices in FG and FE were significantly higher than those in MCD and HCD (P < 0.05). Moreover, stochastic processes dominated the bacterial community, while deterministic processes dominated the fungal community during the early succession of the secondary forest. Co-occurrence networks suggested that the bacterial community was more complex in HCD, whereas the fungal community exhibited greater complexity in FG. Random forest (RF) indicated that soil organic carbon (SOC) and total phosphorus (TP) were the primary nutrient predictors, and structural equation modeling (SEM) suggested that microbial community assembly processes were also the main indicators affecting MNC. Specifically, the assembly processes of the bacterial community (stochastic processes) were positively correlated with MNC, while those of the fungal community (deterministic processes) showed a negative correlation with MNC.

Conclusions

Overall, the bacterial and fungal communities exhibited distinct assembly processes in early succession, with different effects on MNC. The findings enhanced our understanding of the potential links between soil microbial communities and multiple nutrient cycling.