Increasing tree phylogenetic diversity stimulates microbial functional potential in a subtropical forest

doi:10.1093/jpe/rtae096

J Plant Ecol ›› 2024, Vol. 17 ›› Issue (6): rtae096.DOI: 10.1093/jpe/rtae096

• Research Articles • Previous Articles

Increasing tree phylogenetic diversity stimulates microbial functional potential in a subtropical forest

Yuantian Fang^1,2,3, Xunyang He^1,2,4, Qingquan Xie^1,2 and Dejun Li^1,2,4,*

¹Hunan Provincial Key Laboratory of Agroecological Engineering, Key Laboratory of Agroecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
²Guangxi Key Laboratory of Karst Ecological Processes and Services, Huanjiang Observation and Research Station for Karst Ecosystems, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Huanjiang 547100, China
³College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China
⁴Guangxi Industrial Technology Research Institute for Karst Rocky Desertification Control, Nanning 530000, China

^*Corresponding author. E-mail: lidejun@hotmail.com, dejunli@isa.ac.cn

Received:2024-07-03 Accepted:2024-10-08 Online:2024-10-15 Published:2024-12-01
Supported by:
This work was financially supported by National Natural Science Foundation of China (U22A20560, U21A2007) and International Partnership Program of Chinese Academy of Sciences (177GJHZ2022020BS).

增加树木系统发育多样性促进亚热带森林微生物功能潜力

Abstract

Abstract: Soil microbial functions are closely related to ecosystem productivity, carbon sequestration and their responses to global change. Tree phylogenetic diversity (TPD) has been found to impact microbial community composition, diversity and functions, but how it modulates the linkage between microbial community facets and functions remains unclear. Here, 45 plots covering a natural gradient of TPD were selected in a subtropical forest of southwest China to explore how increasing TPD impacts soil microbial community facets and microbial functional potential. The microbial functional potential was evaluated based on the abundances of carbon, nitrogen and phosphorus cycling-related functional genes. Soil fungal alpha diversity increased significantly, but bacterial alpha diversity did not change as TPD increased. Both soil microbial network complexity and stability improved significantly with increasing TPD. Ultimately, increasing TPD promoted soil microbial functional potential by stimulating soil carbon and nitrogen availability, microbial keystone diversity and network stability collectively. These findings emphasize the critical roles of keystone taxa and network stability as microbial factors in stimulating soil microbial function in response to increasing TPD. Therefore, it is strongly recommended to increase TPD so as to stimulate soil microbial functions and other ecosystem functions when implementing afforestation or ecological restoration projects.

Key words: biodiversity, microbial functional potential, fungal-bacterial interactions, tree phylogenetic diversity, subtropical forest

摘要：
土壤微生物功能与生态系统生产力、碳固持及其对全球变化的响应密切相关。尽管已有研究表明，树木系统发育多样性(TPD)影响微生物群落的组成、多样性和功能，但其对微生物群落特征与生态系统功能之间关联的影响尚不明确。本研究在中国西南亚热带森林中选取了45个具有TPD自然梯度的样方，以探讨TPD增加对土壤微生物群落性状及功能潜力的影响。土壤微生物功能潜力利用与碳、氮、磷循环相关的功能基因丰度计算。随着TPD增加，土壤真菌的α多样性显著提高，而细菌的α多样性则未发生显著变化。土壤微生物网络复杂性和稳定性也随TPD增加而显著增强。TPD增加通过提升土壤碳氮可利用水平、关键类群的多样性及微生物共现网络稳定性而促进了土壤微生物功能潜力。这些发现强调了关键微生物类群和网络稳定性作为微生物因子在促进土壤微生物功能响应TPD增加中的关键作用。因此，建议在实施造林或生态恢复工程时增加TPD，以促进土壤微生物功能和其他生态系统功能。

关键词: 生物多样性, 微生物功能潜力, 真菌-细菌互作, 树木系统发育多样性, 亚热带森林

Yuantian Fang, Xunyang He, Qingquan Xie, Dejun Li. Increasing tree phylogenetic diversity stimulates microbial functional potential in a subtropical forest[J]. J Plant Ecol, 2024, 17(6): 1-13.

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Increasing tree phylogenetic diversity stimulates microbial functional potential in a subtropical forest

增加树木系统发育多样性促进亚热带森林微生物功能潜力

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