Water regime alters microbial mechanisms of N2O emission in metal-contaminated paddy soils
文献类型：期刊论文
| 作者 | Guo, Yifan1,4; Cheng, Shulan4; Fang, Huajun1,3,4; Geng, Jing2; Shi, Fangying1,4; Wang, Hui1,4; Chen, Long4; Pu, Haiguang1,4; Liu, Bingqian4; Zhou, Yi4 |
| 刊名 | ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
 |
| 出版日期 | 2025-06-15 |
| 卷号 | 298页码:12 |
| 关键词 | Water management Heavy metals N2O emissions Metagenomic-binning |
| ISSN号 | 0147-6513 |
| DOI | 10.1016/j.ecoenv.2025.118304 |
| 通讯作者 | Cheng, Shulan(slcheng@ucas.ac.cn) ; Fang, Huajun(fanghj@igsnrr.ac.cn) |
| 英文摘要 | Microorganisms are essential for soil nitrous oxide (N2O) emissions through participating in key nitrogen (N)related processes. However, the effect of water regimes on the interactions between N2O emissions and microbial processes in metal-contaminated soils is unclear. Here, we conducted a soil microcosm experiment with two water management strategies (non-flooding and flooding) and six metal addition treatments including low (2 and 200 mg kg- 1) and high (10 and 1000 mg kg- 1) levels of individual and combined Cd and Cu. The effects of high levels of individual Cd and Cu contamination on soil N2O emissions varied depending on water regimes, showing antagonistic effects under non-flooding conditions and synergistic effects under flooding conditions. High levels of co-contamination significantly inhibited nitrification under both water regimes, primarily due to reduced abundance of Nitrosospira. In contrast, this co-contamination decreased the abundance of Ramlibacter, thereby inhibiting denitrification and dissimilatory nitrate reduction to ammonium (DNRA) under flooding conditions. The inhibition of these key microorganisms and their mediated N-cycle processes reduced soil N2O emissions under both water regimes. This reduction was greater under flooding conditions because more N-related processes were inhibited. Metagenomic binning further indicated that Nitrosospira carried nitrifying genes, while Ramlibacter contained genes involved in denitrification, assimilatory nitrate reduction to ammonium (ANRA), and DNRA. These findings implied that both microorganisms had potential to produce N2O. Overall, water management strategies and metal contamination altered the microbial processes of N2O emissions, highlighting the importance of appropriate water management in mitigating greenhouse gas emissions from metalcontaminated paddy soils in southern China. |
| WOS关键词 | NITROGEN CYCLING GENES ; HEAVY-METAL ; AMMONIA OXIDIZERS ; COPPER EXPOSURE ; CADMIUM ; COMMUNITIES ; TOLERANCE ; ABUNDANCE ; POLLUTION ; SORPTION |
| 资助项目 | Postdoctoral Fellowship Program of CPSF[GZC20232622] ; Ji'an City Science and Technology Plan Project[20244-018652] ; Ji'an City Science and Technology Plan Project[2024H-090166] ; Foundation of President of the Zhongke-Ji'an Institute for Eco-Environmental Sciences[ZJIEES-2023-02] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA0440404] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA28130100] ; National Natural Science Foundation of China[41977041] ; National Natural Science Foundation of China[31770558] ; The Unveiling the List of Hanging ; Technology Project of Jinggangshan Agricultural High-tech Industrial Demonstration Zone[20222-051244] |
| WOS研究方向 | Environmental Sciences & Ecology ; Toxicology |
| 语种 | 英语 |
| WOS记录号 | WOS:001493236200020 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 资助机构 | Postdoctoral Fellowship Program of CPSF ; Ji'an City Science and Technology Plan Project ; Foundation of President of the Zhongke-Ji'an Institute for Eco-Environmental Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; The Unveiling the List of Hanging ; Technology Project of Jinggangshan Agricultural High-tech Industrial Demonstration Zone |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/216959]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Cheng, Shulan; Fang, Huajun |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Sun Yat Sen Univ, Sch Geospatial Engn & Sci, Zhuhai 519082, Peoples R China 3.Zhongke Jian Inst Ecoenvironm Sci, Jian 343000, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Yifan,Cheng, Shulan,Fang, Huajun,et al. Water regime alters microbial mechanisms of N2O emission in metal-contaminated paddy soils[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2025,298:12. |
| APA | Guo, Yifan.,Cheng, Shulan.,Fang, Huajun.,Geng, Jing.,Shi, Fangying.,...&Zhou, Yi.(2025).Water regime alters microbial mechanisms of N2O emission in metal-contaminated paddy soils.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,298,12. |
| MLA | Guo, Yifan,et al."Water regime alters microbial mechanisms of N2O emission in metal-contaminated paddy soils".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 298(2025):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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