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Background and aims <p>Soil nematodes, which are integral to soil ecosystems, serve as a fundamental basis for the functioning of forest ecosystems. The combined effects of thinning and replanting, key forest management practices, on soil nematode communities remain understudied.</p> Methods <p>In this study, we implemented three replanting strategies within a uniformly thinned <i>Cupressus funebris</i> plantation: (GAK) replanting with <i>Ginkgo biloba</i>, <i>Acer buergerianum</i> and <i>Koelreuteria paniculata</i>; (GA) replanting with <i>G. biloba</i> and <i>A. buergerianum</i>; and (G) replanting with <i>G. biloba</i>. The soil properties and nematode communities were assessed seasonally (winter and summer) two years post-treatment.</p> Results <p>The results indicated that thinning-replanting practices significantly reduced the soil pH while increasing the soil water content (SWC) and available phosphorus (AP). Similarly, the soil pH was significantly lower in summer, but the SWC and AP were significantly greater. In addition, nematode abundance increased by 129% (winter) and 61% (summer) across thinning-replanting practices, with the GAK treatment resulting in the greatest increase. Moreover, thinning-replanting practices significantly affected nematode community diversity. Thinning-replanting practices significantly improved the Shannon–Wiener diversity index (H’), maturity index (MI), enrichment index (EI) and structure index (SI) of the nematode community. Pearson correlation analysis revealed that H’ and functional group abundance were significantly positively correlated with the SWC and AP but negatively correlated with&#xa0;the pH.</p> Conclusion <p>Overall, thinning-replanting practices, particularly those involving diverse tree species, significantly increased nematode diversity, reduced seasonal variation in the nematode community, and improved soil food web complexity by altering the soil pH, SWC and AP.</p>

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Thinning and replanting enhance soil environmental stability in Cupressus funebris plantations: insights from soil nematodes

  • 期刊论文

  • 发表日期：

    2025年7月16日

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  • Anwei Yu,
  • Zhiren Tang,
  • Haifeng Yin,
  • Siying Wu,
  • Yongqi Xiang,
  • Jingjie Yang,
  • Gang Chen,
  • Guirong Hou,
  • Chuan Fan,
  • Kuangji Zhao,
  • Xianwei Li

摘要

Background and aims

Soil nematodes, which are integral to soil ecosystems, serve as a fundamental basis for the functioning of forest ecosystems. The combined effects of thinning and replanting, key forest management practices, on soil nematode communities remain understudied.

Methods

In this study, we implemented three replanting strategies within a uniformly thinned Cupressus funebris plantation: (GAK) replanting with Ginkgo biloba, Acer buergerianum and Koelreuteria paniculata; (GA) replanting with G. biloba and A. buergerianum; and (G) replanting with G. biloba. The soil properties and nematode communities were assessed seasonally (winter and summer) two years post-treatment.

Results

The results indicated that thinning-replanting practices significantly reduced the soil pH while increasing the soil water content (SWC) and available phosphorus (AP). Similarly, the soil pH was significantly lower in summer, but the SWC and AP were significantly greater. In addition, nematode abundance increased by 129% (winter) and 61% (summer) across thinning-replanting practices, with the GAK treatment resulting in the greatest increase. Moreover, thinning-replanting practices significantly affected nematode community diversity. Thinning-replanting practices significantly improved the Shannon–Wiener diversity index (H’), maturity index (MI), enrichment index (EI) and structure index (SI) of the nematode community. Pearson correlation analysis revealed that H’ and functional group abundance were significantly positively correlated with the SWC and AP but negatively correlated with the pH.

Conclusion

Overall, thinning-replanting practices, particularly those involving diverse tree species, significantly increased nematode diversity, reduced seasonal variation in the nematode community, and improved soil food web complexity by altering the soil pH, SWC and AP.