Microbial mechanisms underlying the reduction of N2O emissions from submerged plant covered system
Submerged plant (SP) restoration is a crucial strategy for restoring aquatic ecosystem. However, the effect of SP on nitrous oxide (N2O) emissions remains controversial, and the impact of SP-attached biofilms on N2O emissions is often overlooked. In this study, SP and non-submerged plant (NSP) syste...
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| Language: | English |
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Elsevier
2025-09-01
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| Series: | Water Research X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2589914725000131 |
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| author | Yongxia Huang Min Deng Shuni Zhou Yunpeng Xue Senbati Yeerken Yuren Wang Lu Li Kang Song |
| author_facet | Yongxia Huang Min Deng Shuni Zhou Yunpeng Xue Senbati Yeerken Yuren Wang Lu Li Kang Song |
| author_sort | Yongxia Huang |
| collection | DOAJ |
| description | Submerged plant (SP) restoration is a crucial strategy for restoring aquatic ecosystem. However, the effect of SP on nitrous oxide (N2O) emissions remains controversial, and the impact of SP-attached biofilms on N2O emissions is often overlooked. In this study, SP and non-submerged plant (NSP) systems were set up and operated continuously for 189 days, revealing that SP reduced N2O flux by 42.4 %. By comparing the N2O net emission rates from water, sediment, and biofilms, we identified biofilms as the primary medium responsible for the reduction in N2O emissions in both SP and NSP systems. Further analysis of N2O metabolic rates from nitrification, denitrification, and abiotic processes under light and dark conditions confirmed that counter-diffusion of dissolved oxygen and nutrients in SP biofilms plays a key role in reducing denitrification-driven N2O emissions. Additionally, SP-attached biofilms increased nosZII-type denitrifiers (e.g., Bacillus) and reduced N2O production potential ((nirS+nirK)/(nosZI+nosZII)). Notably, the establishment of a SP restoration project in a typical eutrophic freshwater lake demonstrated that SP could reduce N2O fluxes by 61.5 %. This study provides significant insights for strategies aimed at mitigating N2O emissions. |
| format | Article |
| id | doaj-art-772fda3383474f698176c84fc0cc0adc |
| institution | Kabale University |
| issn | 2589-9147 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Water Research X |
| spelling | doaj-art-772fda3383474f698176c84fc0cc0adc2025-02-10T04:34:45ZengElsevierWater Research X2589-91472025-09-0128100314Microbial mechanisms underlying the reduction of N2O emissions from submerged plant covered systemYongxia Huang0Min Deng1Shuni Zhou2Yunpeng Xue3Senbati Yeerken4Yuren Wang5Lu Li6Kang Song7National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, PR China; State Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Lake and Watershed Science for Water Security, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR ChinaState Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Lake and Watershed Science for Water Security, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR ChinaState Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Lake and Watershed Science for Water Security, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR ChinaState Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Lake and Watershed Science for Water Security, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR ChinaState Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Lake and Watershed Science for Water Security, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR ChinaState Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Lake and Watershed Science for Water Security, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR ChinaNational-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, PR China; State Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Lake and Watershed Science for Water Security, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR ChinaNational-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, PR China; State Key Laboratory of Freshwater Ecology and Biotechnology, Key Laboratory of Lake and Watershed Science for Water Security, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, PR China; Corresponding author at: Donghu South road No 7, Wuhan city, Hubei province, PR China.Submerged plant (SP) restoration is a crucial strategy for restoring aquatic ecosystem. However, the effect of SP on nitrous oxide (N2O) emissions remains controversial, and the impact of SP-attached biofilms on N2O emissions is often overlooked. In this study, SP and non-submerged plant (NSP) systems were set up and operated continuously for 189 days, revealing that SP reduced N2O flux by 42.4 %. By comparing the N2O net emission rates from water, sediment, and biofilms, we identified biofilms as the primary medium responsible for the reduction in N2O emissions in both SP and NSP systems. Further analysis of N2O metabolic rates from nitrification, denitrification, and abiotic processes under light and dark conditions confirmed that counter-diffusion of dissolved oxygen and nutrients in SP biofilms plays a key role in reducing denitrification-driven N2O emissions. Additionally, SP-attached biofilms increased nosZII-type denitrifiers (e.g., Bacillus) and reduced N2O production potential ((nirS+nirK)/(nosZI+nosZII)). Notably, the establishment of a SP restoration project in a typical eutrophic freshwater lake demonstrated that SP could reduce N2O fluxes by 61.5 %. This study provides significant insights for strategies aimed at mitigating N2O emissions.http://www.sciencedirect.com/science/article/pii/S2589914725000131Plant restorationLeaf-attached biofilmCounter-diffusionNitrification rateN2O reduction rateGreenhouse gas |
| spellingShingle | Yongxia Huang Min Deng Shuni Zhou Yunpeng Xue Senbati Yeerken Yuren Wang Lu Li Kang Song Microbial mechanisms underlying the reduction of N2O emissions from submerged plant covered system Water Research X Plant restoration Leaf-attached biofilm Counter-diffusion Nitrification rate N2O reduction rate Greenhouse gas |
| title | Microbial mechanisms underlying the reduction of N2O emissions from submerged plant covered system |
| title_full | Microbial mechanisms underlying the reduction of N2O emissions from submerged plant covered system |
| title_fullStr | Microbial mechanisms underlying the reduction of N2O emissions from submerged plant covered system |
| title_full_unstemmed | Microbial mechanisms underlying the reduction of N2O emissions from submerged plant covered system |
| title_short | Microbial mechanisms underlying the reduction of N2O emissions from submerged plant covered system |
| title_sort | microbial mechanisms underlying the reduction of n2o emissions from submerged plant covered system |
| topic | Plant restoration Leaf-attached biofilm Counter-diffusion Nitrification rate N2O reduction rate Greenhouse gas |
| url | http://www.sciencedirect.com/science/article/pii/S2589914725000131 |
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