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Heavy metals and nutrients mediate the distribution of soil microbial community in a typical contaminated farmland of South China

文献类型： 外文期刊

作者： Zhang, Feng 1 ; Xie, Yunhe 1 ; Peng, Rui 4 ; Ji, Xionghui 1 ; Bai, Lianyang 5 ;

作者机构： 1.Hunan Acad Agr Sci, Hunan Inst Agroenvironm & Ecol, Changsha 410125, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Agrienvironm Midstream Yangtze Plain, Changsha 410125, Peoples R China

3.Key Lab Prevent, Control & Remediat Soil Heavy Met Pollut Hunan Pro, Changsha 410125, Peoples R China

4.Hunan Hybrid Rice Res Ctr, Changsha 410125, Peoples R China

5.Hunan Acad Agr Sci, Changsha 410125, Peoples R China

关键词： Heavy metal; Nutrients; Microbial community; Spatial distribution; Molecular ecological networks

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：8.2； 五年影响因子：8.6 ）

ISSN： 0048-9697

年卷期： 2024 年 947 卷

页码：

收录情况： SCI

摘要： The effects of heavy metals on soil microbial communities have been extensively investigated, whereas the combined effects of heavy metals and nutrients on soil microbial communities and their interactions are rarely understood. In this study, we investigated the distribution patterns of heavy metals, nutrients and microbial communities in a typical contaminated farmland and explored their interaction mechanisms. The results showed that Cd and Pb were the main pollutants in this area, which mainly came from the smelter. Canonical correspondence analysis and variance decomposition analysis showed that the heavy metals played a more important role in restraining the microbial community structure of soils than other soil properties. Soil Cd, Pb, pH and available K content were the most important environmental factors affecting the microbial community structures in soil. Major Cd tolerant bacteria and fungi were detected including Actinobacteriota, Gemmatimonadota, Entorrhizomycota and Mortierellomycota. The analyses of molecular ecological networks showed that there were 84.1 % of negative correlations among microorganisms. Cd could regulate the abundance of key nodes in Cdtolerant network modules, and these key nodes could improve the adaptability of the whole module to heavy metals through competition with other microorganisms. This study provides insights into the ecological effects of heavy metals and nutrients on soil microbial communities and will help to develop the bio-remediation technologies for contaminated soils.

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