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Background and aims <p>Soil microbes play crucial roles in regulating soil nutrient cycling and shaping plant community structure in forest ecosystems. Compared with our understanding of plant community succession and soil nutrient changes, the succession of soil microbial communities and functional guilds after deforestation remains unclear.</p> Methods <p>We used 16S rRNA gene and internal transcribed spacer amplicon sequencing to investigate the microbial diversity and community composition in surface (0–10&#xa0;cm) and subsurface (10–20&#xa0;cm) mineral soils along a secondary succession after logging in Korean pine forests. Topological structures of microbial co-occurrence networks were also assessed.</p> Results <p>Fungal diversity, community composition, and network structure, rather than bacterial, significantly changed with successional stages. Specifically, the diversity of ectomycorrhizal fungi (EcMF) in subsurface and whole soil layers, and saprotroph diversity in the subsurface, increased monotonically with increasing time since logging, while the relative abundances of plant pathogenic fungi decreased significantly with successional stages in surface and whole soil layers. Fungal network complexity (i.e., average degree) increased monotonically with increasing time since logging. Successional stages were the strongest driver of fungal community composition. In the subsurface layer, successional stages affected fungal diversity strongly and positively by increasing fungal network complexity.</p> Conclusions <p>This study revealed distinct successional trajectories for soil fungal and bacterial communities following forest logging. Compared with bacteria, fungi and their functional guilds (i.e., EcMF, saprotrophs, and plant pathogens) exhibited stronger responses to successional stages, indicating a more important role for facilitating the restoration of broad-leaved Korean pine forests after disturbance.&#xa0;</p>

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Successional trajectories differ between soil microbial guilds after logging in mixed conifer-broadleaf forests

  • 期刊论文

  • 发表日期：

    2025年5月30日

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  • Qiuyan Tan,
  • Xingwu Lin,
  • Leho Tedersoo,
  • Jiasui Li,
  • Xiuhai Zhao,
  • Jianguo Zhu,
  • Haiyan Chu,
  • Teng Yang

摘要

Background and aims

Soil microbes play crucial roles in regulating soil nutrient cycling and shaping plant community structure in forest ecosystems. Compared with our understanding of plant community succession and soil nutrient changes, the succession of soil microbial communities and functional guilds after deforestation remains unclear.

Methods

We used 16S rRNA gene and internal transcribed spacer amplicon sequencing to investigate the microbial diversity and community composition in surface (0–10 cm) and subsurface (10–20 cm) mineral soils along a secondary succession after logging in Korean pine forests. Topological structures of microbial co-occurrence networks were also assessed.

Results

Fungal diversity, community composition, and network structure, rather than bacterial, significantly changed with successional stages. Specifically, the diversity of ectomycorrhizal fungi (EcMF) in subsurface and whole soil layers, and saprotroph diversity in the subsurface, increased monotonically with increasing time since logging, while the relative abundances of plant pathogenic fungi decreased significantly with successional stages in surface and whole soil layers. Fungal network complexity (i.e., average degree) increased monotonically with increasing time since logging. Successional stages were the strongest driver of fungal community composition. In the subsurface layer, successional stages affected fungal diversity strongly and positively by increasing fungal network complexity.

Conclusions

This study revealed distinct successional trajectories for soil fungal and bacterial communities following forest logging. Compared with bacteria, fungi and their functional guilds (i.e., EcMF, saprotrophs, and plant pathogens) exhibited stronger responses to successional stages, indicating a more important role for facilitating the restoration of broad-leaved Korean pine forests after disturbance.