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Background and aims <p>Plant diversity at both the species and genotype level can enhance multiple ecosystem functions (multifunctionality). How this diversity-multifunctionality relationship can be modulated by global changes such as plant invasions that alter soil biotic and abiotic processes, however, is not well understood.</p> Methods <p>We conducted a two-phase experiment to test the effect of soil legacy of a widespread invasive plant, <i>Spartina alterniflora</i>, on the relationship between soil multifunctionality and genotype diversity of a native foundational species, <i>Scirpus mariqueter</i>. We further sequenced soil bacterial and fungal communities to examine their roles in the genotype diversity-soil multifunctionality relationship.</p> Results <p>We found that higher genotype diversity of the native plant led to higher soil multifunctionality, but this positive effect disappeared in soils conditioned by the invader. This was primarily because the invasion legacy disrupted the relationships between plant genotype diversity, fungal network complexity and soil multifunctionality.</p> Conclusion <p>Overall, our study suggests that plant invasion can influence the relationship between plant genotype diversity and soil multifunctionality through soil-legacy effects. These findings highlight the importance of considering the context-dependence of plant diversity-multifunctionality relationships under global change.</p>

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Invasion legacy weakens the positive effect of plant genotype diversity on soil multifunctionality

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • Wei Song,
  • Cai Cheng,
  • Zekang Liu,
  • Shumeng He,
  • Shenggui Xue,
  • Xue Chen,
  • Jingru Zhang,
  • Lejie Wu,
  • Qun Zhang,
  • Guiyao Zhou,
  • Yann Hautier,
  • Ruiting Ju,
  • Bo Li,
  • Jihua Wu

摘要

Background and aims

Plant diversity at both the species and genotype level can enhance multiple ecosystem functions (multifunctionality). How this diversity-multifunctionality relationship can be modulated by global changes such as plant invasions that alter soil biotic and abiotic processes, however, is not well understood.

Methods

We conducted a two-phase experiment to test the effect of soil legacy of a widespread invasive plant, Spartina alterniflora, on the relationship between soil multifunctionality and genotype diversity of a native foundational species, Scirpus mariqueter. We further sequenced soil bacterial and fungal communities to examine their roles in the genotype diversity-soil multifunctionality relationship.

Results

We found that higher genotype diversity of the native plant led to higher soil multifunctionality, but this positive effect disappeared in soils conditioned by the invader. This was primarily because the invasion legacy disrupted the relationships between plant genotype diversity, fungal network complexity and soil multifunctionality.

Conclusion

Overall, our study suggests that plant invasion can influence the relationship between plant genotype diversity and soil multifunctionality through soil-legacy effects. These findings highlight the importance of considering the context-dependence of plant diversity-multifunctionality relationships under global change.