Managing nitrogen metabolism of animal husbandry and aquaculture could mitigate nitrogen threat in the main cities of Yellow River Delta
Excessive nitrogen input threatens the ecological health of the Yellow River estuary, with the Main Cities in the Yellow River Delta (MCYRD) facing persistent nitrogen management challenges. Previous studies have lacked a detailed characterization of nitrogen metabolism in estuarine and coastal citi...
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Elsevier
2025-06-01
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| Series: | Cleaner Environmental Systems |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666789425000194 |
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| author | Yixuan Bai Huaqing Li Bin Chen Hongyi Xie Yutao Wang |
| author_facet | Yixuan Bai Huaqing Li Bin Chen Hongyi Xie Yutao Wang |
| author_sort | Yixuan Bai |
| collection | DOAJ |
| description | Excessive nitrogen input threatens the ecological health of the Yellow River estuary, with the Main Cities in the Yellow River Delta (MCYRD) facing persistent nitrogen management challenges. Previous studies have lacked a detailed characterization of nitrogen metabolism in estuarine and coastal cities, with limited sector-specific assessments, constraining effective management. Based on urban metabolism theory, this study develops a comprehensive nitrogen metabolism model for MCYRD (2015–2023), refining assessments of nitrogen fluxes from extensive animal husbandry and seawater aquaculture. Results show that nitrogen input to the sea fluctuated around 60 Gg, with aquaculture as the dominant contributor (35.53 %) to surface water and the only productive sector with increasing discharge (+5.28 %), followed by animal husbandry (32.00 %). Among them, seawater aquaculture discharged 234.89 % and 508.11 % more nitrogen than inland aquaculture in Binzhou and Dongying, respectively, posing ecological risks due to the lack of wastewater discharge standards, particularly from shellfish farming. Untreated extensive animal husbandry contributed 81.43 % of animal husbandry runoff, with cattle in Binzhou and sheep in Dongying as the major sources, highlighting the urgency of improved manure management. Meanwhile, by enforcing wastewater treatment in aquaculture, MCYRD could cut nitrogen emissions by 13.00 Gg, while fertilizer reduction and livestock intensification offer long-term mitigation potential. Upgrading wastewater treatment technologies remains essential for sustained nitrogen control. Our findings provide a scientific basis for nitrogen pollution management in MCYRD, supporting targeted strategies for coastal ecosystem protection. |
| format | Article |
| id | doaj-art-aa074aed8db54d2391f28e21d3b44c14 |
| institution | DOAJ |
| issn | 2666-7894 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
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| series | Cleaner Environmental Systems |
| spelling | doaj-art-aa074aed8db54d2391f28e21d3b44c142025-08-20T03:13:29ZengElsevierCleaner Environmental Systems2666-78942025-06-011710027310.1016/j.cesys.2025.100273Managing nitrogen metabolism of animal husbandry and aquaculture could mitigate nitrogen threat in the main cities of Yellow River DeltaYixuan Bai0Huaqing Li1Bin Chen2Hongyi Xie3Yutao Wang4Fudan Tyndall Center and Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200082, China; Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation of the Ministry of Ecology and Environment, Shandong Academy for Environmental Planning, Jinan, 250101, ChinaFudan Tyndall Center and Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200082, China; Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation of the Ministry of Ecology and Environment, Shandong Academy for Environmental Planning, Jinan, 250101, ChinaFudan Tyndall Center and Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200082, China; Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation of the Ministry of Ecology and Environment, Shandong Academy for Environmental Planning, Jinan, 250101, ChinaFudan Tyndall Center and Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200082, China; Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation of the Ministry of Ecology and Environment, Shandong Academy for Environmental Planning, Jinan, 250101, ChinaFudan Tyndall Center and Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200082, China; Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation of the Ministry of Ecology and Environment, Shandong Academy for Environmental Planning, Jinan, 250101, China; Corresponding author. Fudan Tyndall Center and Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200082, China.Excessive nitrogen input threatens the ecological health of the Yellow River estuary, with the Main Cities in the Yellow River Delta (MCYRD) facing persistent nitrogen management challenges. Previous studies have lacked a detailed characterization of nitrogen metabolism in estuarine and coastal cities, with limited sector-specific assessments, constraining effective management. Based on urban metabolism theory, this study develops a comprehensive nitrogen metabolism model for MCYRD (2015–2023), refining assessments of nitrogen fluxes from extensive animal husbandry and seawater aquaculture. Results show that nitrogen input to the sea fluctuated around 60 Gg, with aquaculture as the dominant contributor (35.53 %) to surface water and the only productive sector with increasing discharge (+5.28 %), followed by animal husbandry (32.00 %). Among them, seawater aquaculture discharged 234.89 % and 508.11 % more nitrogen than inland aquaculture in Binzhou and Dongying, respectively, posing ecological risks due to the lack of wastewater discharge standards, particularly from shellfish farming. Untreated extensive animal husbandry contributed 81.43 % of animal husbandry runoff, with cattle in Binzhou and sheep in Dongying as the major sources, highlighting the urgency of improved manure management. Meanwhile, by enforcing wastewater treatment in aquaculture, MCYRD could cut nitrogen emissions by 13.00 Gg, while fertilizer reduction and livestock intensification offer long-term mitigation potential. Upgrading wastewater treatment technologies remains essential for sustained nitrogen control. Our findings provide a scientific basis for nitrogen pollution management in MCYRD, supporting targeted strategies for coastal ecosystem protection.http://www.sciencedirect.com/science/article/pii/S2666789425000194Urban nitrogen metabolismYellow river deltaMaterial flow analysis |
| spellingShingle | Yixuan Bai Huaqing Li Bin Chen Hongyi Xie Yutao Wang Managing nitrogen metabolism of animal husbandry and aquaculture could mitigate nitrogen threat in the main cities of Yellow River Delta Cleaner Environmental Systems Urban nitrogen metabolism Yellow river delta Material flow analysis |
| title | Managing nitrogen metabolism of animal husbandry and aquaculture could mitigate nitrogen threat in the main cities of Yellow River Delta |
| title_full | Managing nitrogen metabolism of animal husbandry and aquaculture could mitigate nitrogen threat in the main cities of Yellow River Delta |
| title_fullStr | Managing nitrogen metabolism of animal husbandry and aquaculture could mitigate nitrogen threat in the main cities of Yellow River Delta |
| title_full_unstemmed | Managing nitrogen metabolism of animal husbandry and aquaculture could mitigate nitrogen threat in the main cities of Yellow River Delta |
| title_short | Managing nitrogen metabolism of animal husbandry and aquaculture could mitigate nitrogen threat in the main cities of Yellow River Delta |
| title_sort | managing nitrogen metabolism of animal husbandry and aquaculture could mitigate nitrogen threat in the main cities of yellow river delta |
| topic | Urban nitrogen metabolism Yellow river delta Material flow analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2666789425000194 |
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