Nitrogen deposition reduces biodiversity but strengthens plant-microbe interactions

文献类型： 外文期刊

第一作者： Hu, Zonghao

作者： Hu, Zonghao;Fan, Yi;Pang, Shuang;Zhang, Ximei;Hu, Zonghao;Fan, Yi;Pang, Shuang;Zhang, Ximei;Yang, Junjie;Mao, Rong;Zhang, Yang;Han, Xingguo

作者机构：

关键词： Biomass; Plant-microbe interactions; Productivity; Network; Nitrogen enrichment

期刊名称：GEODERMA （ 影响因子：6.6； 五年影响因子：7.3 ）

ISSN： 0016-7061

年卷期： 2025 年 460 卷

页码：

收录情况： SCI

摘要： Nitrogen deposition can reduce plant and soil microbial diversity, and thus, it was traditionally thought to decouple plant-microbe interactions. However, few studies quantified these interactions directly and systematically. Here, we conducted a long-term nitrogen deposition experiment with nine rates (0-50 g nitrogen m-2 yr-1) in the Eurasian steppe. Although nitrogen addition reduced biodiversity, it strengthened the relationships between plant and microbial community indices (biomass, richness, and composition) in a structural equation model, increased the Pearson's correlation coefficient (r) between plant biomass and microbial biomass, and also increased the density of the plant-microbe interaction subnetwork. These results challenge the traditional decoupling viewpoint and indicate that plant-microbe interactions strengthen to adapt to increasing nitrogen deposition pressure.

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