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Local-scale soil nematode diversity in a subtropical forest depends on the phylogenetic and functional diversity of neighbor trees

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Abstract

Purpose

Understanding the impact of neighbor tree diversity on soil biodiversity at the individual tree scale and clarifying which facets of neighbor tree diversity have a decisive impact on soil biodiversity.

Methods

We collected and identified soil nematodes underneath 256 individual trees of 16 species at four species-richness levels (1, 2, 4, 8 species) in a large tree diversity experiment in southeast China. We analyzed how the taxonomic, phylogenetic, and functional diversity of the nematode community were influenced by neighbor tree diversity.

Results

Our analyses showed that nematode alpha diversity at the individual tree scale decreased with increasing neighbor tree richness while beta diversity increased at taxonomic, phylogenetic, and functional levels. Nematode alpha diversity at the plot scale increased with increasing neighbor tree richness. Secondly, we found that reducing redundant species and increasing distinct species led to the differentiation of nematode communities under different individual trees in high-richness plots. Finally, our data revealed that the functional diversity of the neighbor tree community had the largest effects on the diversity of the local nematode community.

Conclusion

Our study emphasizes that there is a significant influence from neighboring trees, mainly the functional traits of the trees, even though they are spaced at distances multitudes greater than the distance over which soil nematodes can move. Hence it is important to consider these broader spatial aspects when examining the plant and soil biotic interactions.

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Data availability

Data supporting the findings of this study will be deposited in the SCIENCE DATA BANK.

References

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Acknowledgements

We are grateful to Prof. Keping Ma and the BEF-China consortium for support. We thank Xuefei Yang, Sabine Both, Xiaojuan Liu and Bo Yang for coordinating the platform. We are grateful for the help of Bo Yang and several local assistants for their helps in the sampling. This work was supported by the National Natural Science Foundation of China (U20A2083), the China Postdoctoral Science Foundation (2021T140697), K.C.Wong Education Foundation (GJTD-2019-10) and Major Program of Institute of Applied Ecology, Chinese Academy of Sciences (IAEMP202201). H.B. acknowledges funding from the German Research Foundation (DFG FOR 891/3).

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Authors and Affiliations

Authors

Contributions

QL, HB, and MB conceived the ideas and designed the research; QL, XFD, ZWW and XLS collected the data; YBL and XH analyzed the data; YBL, QL, MB and WJL led the writing of the manuscript. All authors contributed critically to the drafts and gave final approval for publication.

Corresponding authors

Correspondence to Yingbin Li or Qi Li.

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Competing interests

All authors report no conflicts of interest.

Additional information

Responsible Editor: Manuel Delgado-Baquerizo.

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Yingbin Li and Xiaofang Du should be considered joint first author.

Supplementary information

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Cite this article

Li, Y., Du, X., Su, X. et al. Local-scale soil nematode diversity in a subtropical forest depends on the phylogenetic and functional diversity of neighbor trees. Plant Soil 486, 441–454 (2023). https://doi.org/10.1007/s11104-023-05882-2

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  • DOI: https://doi.org/10.1007/s11104-023-05882-2

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