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The interaction strength of keystone module in cross-kingdom network determines microbial carbon metabolic stability under temperature stress

文献类型： 外文期刊

作者： Chen, Kaiye 1 ; Yu, Hongmei 1 ; Wang, Hui 2 ; Li, Peng 3 ; Cheng, Kun 4 ; Wu, Tao 1 ; Chen, Shuntao 1 ; Jia, Zhenyi 1 ; Xie, Xuefeng 1 ; Zhu, Lingyue 1 ;

作者机构： 1.Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Peoples R China

2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China

3.Natl Forestry & Grass Adm, Guangxi Zhuang Autonomous Reg Forestry Res Inst, Guangxi Masson Pine Engn Technol Res Ctr, Guangxi Key Lab Fine Timber Forest Resources Culti, Nanning 530002, Guangxi, Peoples R China

4.Jiangxi Inst Red Soil & Germplasm Resources, Key Lab Arable Land Improvement & Qual Improvement, Nanchang 331717, Jiangxi, Peoples R China

关键词： Microbial community; Temperature stress; Co-occurrence network; Keystone species; Microbial carbon metabolism

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：5.0； 五年影响因子：5.4 ）

ISSN： 0929-1393

年卷期： 2025 年 206 卷

页码：

收录情况： SCI

摘要： Soil encompasses a myriad of diverse and abundant microorganisms that intricately govern the processes of carbon cycling through complex species interactions. Species interactions promote resilience and adaptability, ensuring that microbial communities can maintain their carbon metabolic functions despite environmental challenges. However, the extent to which cross-kingdom species interactions influence microbial carbon metabolic stability under global climate change remains largely unexplored. In this study, we collected field samples and conducted laboratory culture experiments to investigate the effect of the keystone species interactions of cross-kingdom network on the stability of microbial carbon metabolism under the temperature stress. Our results indicated that prolonged of high-temperature stress decreased the diversity of microbial communities and alters their structure and composition, thereby decreasing the stability of cross-kingdom networks. Furthermore, sustained low- and high-temperature stress significantly reduced the stability of microbial carbon metabolic activity, with the stability of bacterial and fungal communities being lowest under high-temperature treatment. Correlation analysis revealed that the interaction strength among microbes in keystone modules was closely related to microbial carbon metabolic activity. Finally, we applied partial least squares structural equation modeling (PLSSEM) to demonstrate that the interaction strength within keystone modules of cross-kingdom networks significantly and positively influenced microbial carbon metabolic activity stability. This study elucidated the dynamic responses of microbial communities and carbon metabolism to temperature stress, thereby highlighting the pivotal role of cross-kingdom interactions among keystone modules in regulating microbial carbon metabolic stability. These insights provided new perspectives on the relationship between soil microorganisms and ecosystem stability, underscoring the importance of species interactions.

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