Nat Commun2026Article

随着全球森林生产力的提高，植物多样性对土壤呼吸的积极影响逐渐减弱

Plant diversity’s positive effect on soil respiration diminishes with increasing productivity in global forests

Benjamin Laffitte · Zhihan Yang · Jinshi Jian · Philippe Ciais · Lei Chen · Yunfeng Yang · Xinli Chen · Ni Huang · Tao Zhou · Xiangjun Pei · Xiaolu Tang

1. 信息

DOI10.1038/s41467-026-69594-8

期刊Nature Communications / Nat Commun

类型Article

发表2026-02-21 （online）

卷期页17(1): 3023

收录2026-10-04

被浏览…

关键词plant species richness soil respiration net primary productivity biodiversity-productivity relationship soil carbon flux ecosystem carbon dynamics resource constraints global forests

标签—

2. 摘要

植物多样性对于调节生态系统功能至关重要，但其与土壤呼吸（碳循环的关键组成部分）的全球尺度关系仍未得到充分研究。植物生产力调节着生态系统过程，而了解植物物种丰富度如何调节净初级生产力梯度上的土壤呼吸，是预测碳-气候反馈的关键。本文整合了两个全球植物物种丰富度数据集（乔木物种丰富度和维管植物物种丰富度，包括木本和非木本植物）以及一个基于深度学习模型估算的全球土壤呼吸数据集，该模型基于6355个实地观测数据进行训练。我们发现，植物多样性能够增强低至中等生产力森林（碳含量低于1300 g C m⁻² yr⁻¹）的土壤呼吸，但这种效应在高生产力森林中减弱。通过沿净初级生产力梯度对森林进行分层，并利用结构方程模型控制气候、土壤和植被协变量，我们揭示了生物多样性作用的情境依赖性。在资源匮乏的生态系统中，植物物种丰富度越高，土壤呼吸作用越强；但在高生产力森林中，植物物种丰富度对土壤呼吸作用的贡献却微乎其微，因为在高生产力森林中，非生物因素的影响更为显著。我们的研究结果揭示了生物多样性如何影响土壤碳通量，并阐明了其在塑造不同生产力梯度下的生态系统碳动态变化中所发挥的动态作用。

原文摘要（English）

), but this effect diminishes in high-productivity forests. By stratifying forests along a net primary production gradient and controlling for climatic, soil, and vegetation covariates via structural equation modeling, we reveal a context-dependent role of biodiversity. Greater plant species richness amplifies soil respiration in resource-limited systems but contributes minimally in high-productivity forests, where abiotic factors exert stronger influence. Our findings provide insights into how biodiversity influences soil carbon fluxes, revealing its dynamic role in shaping ecosystem carbon dynamics across productivity gradients.

3. 图表

4. 引用

Laffitte B, Yang Z, Jian J, et al. Plant diversity’s positive effect on soil respiration diminishes with increasing productivity in global forests[J]. Nature Communications, 2026, 17(1): 3023. DOI: 10.1038/s41467-026-69594-8.

查看 BibTeX

@article{laffitte2026,
  author = {Benjamin Laffitte and Zhihan Yang and Jinshi Jian and Philippe Ciais and Lei Chen and Yunfeng Yang and Xinli Chen and Ni Huang and Tao Zhou and Xiangjun Pei and Xiaolu Tang},
  title = {Plant diversity’s positive effect on soil respiration diminishes with increasing productivity in global forests},
  journal = {Nature Communications},
  year = {2026},
  volume = {17},
  number = {1},
  pages = {3023},
  doi = {10.1038/s41467-026-69594-8},
  publisher = {Springer Science and Business Media LLC},
}

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