Global Relative Importance of Denitrification and Anammox in Microbial Nitrogen Loss Across Terrestrial and Aquatic Ecosystems
Abstract Denitrification and anaerobic ammonium oxidation (anammox) are the major microbial processes responsible for global nitrogen (N) loss. Yet, the relative contributions of denitrification and anammox to N loss across contrasting terrestrial and aquatic ecosystems worldwide remain unclear, ham...
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| Format: | Article |
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Wiley
2025-02-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202406857 |
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| author | Gang He Danli Deng Manuel Delgado‐Baquerizo Wenzhi Liu Quanfa Zhang |
| author_facet | Gang He Danli Deng Manuel Delgado‐Baquerizo Wenzhi Liu Quanfa Zhang |
| author_sort | Gang He |
| collection | DOAJ |
| description | Abstract Denitrification and anaerobic ammonium oxidation (anammox) are the major microbial processes responsible for global nitrogen (N) loss. Yet, the relative contributions of denitrification and anammox to N loss across contrasting terrestrial and aquatic ecosystems worldwide remain unclear, hampering capacities to predict the human alterations in the global N cycle. Here, a global synthesis including 3240 observations from 199 published isotope pairing studies is conducted and finds that denitrification governs microbial N loss globally (79.8±0.4%). Significantly, anammox is more important in aquatic than terrestrial ecosystems worldwide and can contribute up to 43.2% of N loss in global seawater. Global maps for N loss associated with denitrification and anammox are further generated and show that the contribution of anammox to N loss decreases with latitude for soils and sediments but generally increases with substrate depth. This work highlights the importance of anammox as well as denitrification in driving ecosystem N losses, which is critical for improving the current global N cycle model and achieving sustainable N management. |
| format | Article |
| id | doaj-art-d0d4033d8a894b1bb85bbe92f8f761c7 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-d0d4033d8a894b1bb85bbe92f8f761c72025-08-20T03:49:36ZengWileyAdvanced Science2198-38442025-02-01128n/an/a10.1002/advs.202406857Global Relative Importance of Denitrification and Anammox in Microbial Nitrogen Loss Across Terrestrial and Aquatic EcosystemsGang He0Danli Deng1Manuel Delgado‐Baquerizo2Wenzhi Liu3Quanfa Zhang4Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan Botanical Garden Chinese Academy of Sciences Wuhan 430074 P.R. ChinaHubei Field Observation and Scientific Research Stations for Water Ecosystem in Three Gorges Reservoir China Three Gorges University Yichang 443002 P.R. ChinaLaboratorio de Biodiversidad y Funcionamiento Ecosistémico. Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS) CSIC Av. Reina Mercedes 10 Sevilla E‐41012 SpainHubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan Botanical Garden Chinese Academy of Sciences Wuhan 430074 P.R. ChinaDanjiangkou Wetland Ecosystem Field Scientific Observation and Research Station Chinese Academy of Sciences & Hubei Province Wuhan 430074 P.R. ChinaAbstract Denitrification and anaerobic ammonium oxidation (anammox) are the major microbial processes responsible for global nitrogen (N) loss. Yet, the relative contributions of denitrification and anammox to N loss across contrasting terrestrial and aquatic ecosystems worldwide remain unclear, hampering capacities to predict the human alterations in the global N cycle. Here, a global synthesis including 3240 observations from 199 published isotope pairing studies is conducted and finds that denitrification governs microbial N loss globally (79.8±0.4%). Significantly, anammox is more important in aquatic than terrestrial ecosystems worldwide and can contribute up to 43.2% of N loss in global seawater. Global maps for N loss associated with denitrification and anammox are further generated and show that the contribution of anammox to N loss decreases with latitude for soils and sediments but generally increases with substrate depth. This work highlights the importance of anammox as well as denitrification in driving ecosystem N losses, which is critical for improving the current global N cycle model and achieving sustainable N management.https://doi.org/10.1002/advs.202406857anammoxdenitrificationeutrophicationglobal predictionnitrogen removal |
| spellingShingle | Gang He Danli Deng Manuel Delgado‐Baquerizo Wenzhi Liu Quanfa Zhang Global Relative Importance of Denitrification and Anammox in Microbial Nitrogen Loss Across Terrestrial and Aquatic Ecosystems Advanced Science anammox denitrification eutrophication global prediction nitrogen removal |
| title | Global Relative Importance of Denitrification and Anammox in Microbial Nitrogen Loss Across Terrestrial and Aquatic Ecosystems |
| title_full | Global Relative Importance of Denitrification and Anammox in Microbial Nitrogen Loss Across Terrestrial and Aquatic Ecosystems |
| title_fullStr | Global Relative Importance of Denitrification and Anammox in Microbial Nitrogen Loss Across Terrestrial and Aquatic Ecosystems |
| title_full_unstemmed | Global Relative Importance of Denitrification and Anammox in Microbial Nitrogen Loss Across Terrestrial and Aquatic Ecosystems |
| title_short | Global Relative Importance of Denitrification and Anammox in Microbial Nitrogen Loss Across Terrestrial and Aquatic Ecosystems |
| title_sort | global relative importance of denitrification and anammox in microbial nitrogen loss across terrestrial and aquatic ecosystems |
| topic | anammox denitrification eutrophication global prediction nitrogen removal |
| url | https://doi.org/10.1002/advs.202406857 |
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