Freshwater Salinization Mitigated N₂O Emissions in Submerged Plant-Covered Systems: Insights from Attached Biofilms

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

Submerged plants (SMPs) play a critical role in improving water quality and reducing N2O greenhouse gas emissions. However, freshwater salinization represents major environmental challenge aquatic systems. To investigate the impact of on emissions, this study conducted indoor mesocosm experiments simulating SMP nonsubmerged plant (Non_SMP) areas lakes. The objective was to explore effects microbial mechanisms attached biofilm emission salinization. Salinization systems (700–1500 μS cm–1) reduced flux by 37.0 40.5% compared (<700 SMPs Non_SMPs, respectively. Kinetic showed that reduction emissions mainly attributed rather than sediment or water. net rates decreased 47.1 71.8% respectively, with Additionally, biofilms exhibited lower denitrification rates. Furthermore, production potential ((nirS + nirK)/(nosZI nosZII)), thereby further decreasing This provides valuable insights into mitigating salinized

Язык: Английский

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Roles of core nosZ denitrifiers in enhancing denitrification activity under long-term rice straw retention

Frontiers in Plant Science, Год журнала: 2025, Номер 16

Опубликована: Фев. 7, 2025

The denitrification process is known to contribute soil nitrogen (N) loss, which strongly affected by fertilization strategies; however, the effects of distinct straw retention modes on activity have rarely been discriminated and underlying mechanisms remain unclear. This study coupled field incubation experiments explore characteristics activity, standing water physicochemical properties, abundance, community diversity, co-occurrence network nosZ denitrifiers, based a paddy implementing 10-year under rice-wheat rotation system. Four treatments with equivalent chemical fertilizers were applied, namely no (NS), wheat only (WS), rice (RS), (WRS). Results indicated significant increase (by 41.93-45.80% when compared that NS) in RS WRS. Correspondingly, resulted development similar composition (P < 0.05), structure = 0.001), more positively interconnected network, as well specific keystone taxa relative those non-rice mode. Under long-term conditions, core nosZ-denitrifying phylogroups shifted (r 0.83, P recruitment from phyla Bacteroidetes Euryarchaeota playing key role enhancing stimulating N loss. Accordingly, field, practice single season recommended because it will not markedly sacrifice availability impaired process.

Язык: Английский

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Effects of Aeration Conditions on Nitrogen Removal Performance and N2O Emissions in a Biofilm CANON Reactor

Biochemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 109724 - 109724

Опубликована: Март 1, 2025

Язык: Английский

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Response of the nosZ-type denitrifying microbial community and metsabolic characteristics to precipitation changes in the alpine wetland

Frontiers in Microbiology, Год журнала: 2025, Номер 16

Опубликована: Апрель 24, 2025

The impact of climate change on the global hydrological cycle is becoming increasingly significant, with changes in precipitation patterns emerging as a key factor influencing carbon and nitrogen cycling processes alpine wetland ecosystems. However, response nosZ-type denitrifying microbial community its metabolic characteristics source to remains unclear. In this study, high-throughput sequencing nosZ gene LC-MS-based metabolomics were used investigate (4 years) Qinghai Lake. results showed that Microvirga was bacterial group Lake, Azospirillum sensitive ( P &lt; 0.05). 50% rainfall enhancement treatment significantly increased soil moisture, total content an increasing trend increase pH most important explanatory for structure, while diversity. Deterministic dominated assemblage Soil analysis differential metabolites Source Wetland mostly exhibited significant positive correlations. Precipitation affected relative abundance N-Acetylaspartic acid. summary, lower more favorable maintaining storage wetlands variation disrupted existing balance within ecosystem altered structure characteristics. These findings imply change-driven shifts may dynamics wetlands, alter stability, have profound effects communities biogeochemical cycles.

Язык: Английский

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Straw and Biochar Amendments Over a Decade Differently Modulates Denitrification Gas Products

Water Air & Soil Pollution, Год журнала: 2024, Номер 235(12)

Опубликована: Окт. 27, 2024

Язык: Английский

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