Deterministic assembly of grassland soil microbial communities driven by climate warming amplifies soil carbon loss

环境科学 全球变暖 土壤碳 气候变化 草原 生态学 土壤流失 土壤水分 碳纤维 农林复合经营 土壤科学 生物 计算机科学 算法 地表径流 复合数
作者
Xing Wang,Zhengchen Wang,Fang Chen,Zhenjiao Zhang,Jingbo Fang,Liheng Xing,Jia Zeng,Qi Zhang,Hanyu Liu,Weichao Liu,Chengjie Ren,Gaihe Yang,Zekun Zhong,Wei Zhang,Xinhui Han
出处
期刊:Science of The Total Environment [Elsevier BV]
卷期号:923: 171418-171418 被引量:10
标识
DOI:10.1016/j.scitotenv.2024.171418
摘要

Perturbations in soil microbial communities caused by climate warming are expected to have a strong impact on biodiversity and future climate–carbon (C) feedback, especially in vulnerable habitats that are highly sensitive to environmental change. Here, we investigate the impact of four-year experimental warming on soil microbes and C cycling in the Loess Hilly Region of China. The results showed that warming led to soil C loss, mainly from labile C, and this C loss is associated with microbial response. Warming significantly decreased soil bacterial diversity and altered its community structure, especially increasing the abundance of heat-tolerant microorganisms, but had no effect on fungi. Warming also significantly increased the relative importance of homogeneous selection and decreased "drift" of bacterial and fungal communities. Moreover, warming decreased bacterial network stability but increased fungal network stability. Notably, the magnitude of soil C loss was significantly and positively correlated with differences in bacterial community characteristics under ambient and warming conditions, including diversity, composition, network stability, and community assembly. This result suggests that microbial responses to warming may amplify soil C loss. Combined, these results provide insights into soil microbial responses and C feedback in vulnerable ecosystems under climate warming scenarios.
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