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Mercury drives microbial community assembly and ecosystem multifunctionality across a Hg contamination gradient in rice paddies
Qiang Pu; Kun Zhang; Alexandre J. Poulain; Jiang Liu; Rui Zhang; Mahmoud A. Abdelhafiz; Bo Meng; Xinbin Feng
2022
Source PublicationJournal of Hazardous Materials
Volume435Pages:129055
Abstract

Soil microbial communities are critical for maintaining terrestrial ecosystems and fundamental ecological processes. Mercury (Hg) is a heavy metal that is toxic to microorganisms, but its effects on microbial community assembly and ecosystem multifunctionality in rice paddy ecosystems remain largely unknown. In the current study, we analyzed the microbial community structure and ecosystem multifunctionality of paddy soils across a Hg contamination gradient. The results demonstrated that Hg contamination significantly altered the microbial community structure. The microbial communities were predominantly driven by deterministic selection rather than stochastic processes. The random forest model and variation partition analysis demonstrated that the Hg level was the most important predictor of microbial profiles. Ecosystem multifunctionality decreased across the Hg concentration gradient, and multifunctionality was significantly correlated with soil biodiversity, suggesting that Hg-induced reductions in soil biodiversity led to reduced ecosystem services. A structural equation model showed that Hg contamination directly and indirectly affected ecosystem multifunctionality. The present work broadens our knowledge of the assembly of the microbiome in rice paddies across a Hg contamination gradient and highlights the significance of soil biodiversity in regulating ecosystem functions, especially in Hg-polluted rice paddies.

KeywordMercury biological Process community Assembly soil Microbial Diversity ecosystem Functions
DOI10.1016/j.jhazmat.2022.129055
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Indexed BySCI
Language英语
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Cited Times:33[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/13450
Collection环境地球化学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples
3.Univ Ottawa, Biol Dept, 30 Marie Curie, Ottawa, ON K1N 6N5, Canada
4.Al Azhar Univ, Fac Sci, Geol Dept, Assiut 71524, Egypt
5.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples
Recommended Citation
GB/T 7714
Qiang Pu,Kun Zhang,Alexandre J. Poulain,et al. Mercury drives microbial community assembly and ecosystem multifunctionality across a Hg contamination gradient in rice paddies[J]. Journal of Hazardous Materials,2022,435:129055.
APA Qiang Pu.,Kun Zhang.,Alexandre J. Poulain.,Jiang Liu.,Rui Zhang.,...&Xinbin Feng.(2022).Mercury drives microbial community assembly and ecosystem multifunctionality across a Hg contamination gradient in rice paddies.Journal of Hazardous Materials,435,129055.
MLA Qiang Pu,et al."Mercury drives microbial community assembly and ecosystem multifunctionality across a Hg contamination gradient in rice paddies".Journal of Hazardous Materials 435(2022):129055.
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