Chen Wenqing, Wang Jianyu, Zhang Zhangxing, Li Yuyu, Ji Yongbiao, Li Xinwen, Dai Xinzhe, Huang Yichen
College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China; Northwest A&F University Shenzhen Research Institute, Shenzhen, Guangdong 518000, China.
College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China.
Curr Biol. 2025 Jan 20;35(2):373-382.e4. doi: 10.1016/j.cub.2024.11.040. Epub 2024 Dec 30.
There is increasing evidence that ecosystems are affected by multiple global change factors, impeding the sustainability of multiple soil functions. Biodiversity can buffer ecosystem functions against environmental changes, a concept largely supported by insurance and portfolio theories. However, the role of soil biodiversity, especially the diversity of abundant and rare microbial taxa, in regulating soil multifunctionality resistance under an increasing number of global change factors remains poorly explored. Here, we assessed the effects of the diversity of abundant and rare microbial taxa on soil multifunctionality resistance under different numbers of global change factors using 650 microcosms. The increasing number of global change factors reduced the effects of the diversity of abundant and rare microbial taxa on soil multifunctionality resistance and shifted their relative importance. The diversity of abundant taxa showed stronger positive effects on soil multifunctionality resistance under one or two global change factors. However, the diversity of rare taxa had stronger effects under multiple co-acting global change factors. The resistance of abundant and rare microbial taxa was significantly associated with their respective diversity effects on soil multifunctionality resistance. These effects were represented by standardized slopes that evaluated the relationships between microbial diversity and multifunctionality resistance under varying numbers of global change factors. Our findings indicate a shift in the relative importance of the diversity of abundant and rare microbial taxa in regulating soil multifunctionality resistance with an increasing number of global change factors, providing new insights into the relationship between soil biodiversity and ecosystem stability under environmental disturbances.
越来越多的证据表明，生态系统受到多种全球变化因素的影响，这阻碍了多种土壤功能的可持续性。生物多样性可以缓冲生态系统功能以应对环境变化，这一概念在很大程度上得到了保险和投资组合理论的支持。然而，土壤生物多样性的作用，尤其是丰富和稀有微生物类群的多样性，在越来越多的全球变化因素下对调节土壤多功能抗性的作用仍未得到充分探索。在这里，我们使用650个微观生态系统评估了丰富和稀有微生物类群的多样性在不同数量的全球变化因素下对土壤多功能抗性的影响。全球变化因素数量的增加降低了丰富和稀有微生物类群的多样性对土壤多功能抗性的影响，并改变了它们的相对重要性。在一个或两个全球变化因素下，丰富类群的多样性对土壤多功能抗性表现出更强的积极影响。然而，在多个共同作用的全球变化因素下，稀有类群的多样性影响更强。丰富和稀有微生物类群的抗性与它们各自对土壤多功能抗性的多样性影响显著相关。这些影响由标准化斜率表示，标准化斜率评估了在不同数量的全球变化因素下微生物多样性与多功能抗性之间的关系。我们的研究结果表明，随着全球变化因素数量的增加，丰富和稀有微生物类群的多样性在调节土壤多功能抗性方面的相对重要性发生了变化，这为环境干扰下土壤生物多样性与生态系统稳定性之间的关系提供了新的见解。
