数字农科院2.0

Heavy metals drive microbial community assembly process in farmland with long-term biosolids application

文献类型： 外文期刊

作者： Sun T.;Li G.;Mazarji M.;Delaplace P.;Yang X.;Zhang J.;Pan J.

作者机构：

关键词： Biosolids;Community assembly process;Heavy metals;Soil microbial community

期刊名称： Journal of Hazardous Materials

ISSN： 0304-3894

年卷期： 2024 年 468 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Biosolids are considered an alternative to chemical fertilizers due to their rich nutrients. However, long-term biosolids application can lead to heavy metals accumulation, which severely affects soil microbial community compositions. The factors influencing soil microbial community assembly were explored under a 16-year long-term experiment with biosolids applications. Our results indicated that biosolids application significantly increased fungal richness while not for bacterial and arbuscular mycorrhizal (AM) fungal richness. Besides, biosolids application significantly affected soil bacterial, fungal compositions and AM fungal community. Soil microorganisms were clustered into different modules with bacterial and AM fungal communities were affected by both organic matter and heavy metals, while fungal communities were affected by heavy metals (Cr, Ni, and As). The soil bacterial community assembly was dominated by stochastic processes while the fungal and AM fungal community assemblies were mainly driven by deterministic processes. Random forest analysis showed that heavy metals were identified as major drivers (Hg, Cu, Cd, and Zn for bacteria, Pb and Cr for fungi, and As and Ni for AM fungi) of the community assembly process. Overall, our study highlights the significant role of heavy metals in shaping microbial community dynamics and gives a guide for controlling biosolids application. © 2024 Elsevier B.V.

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