Environmental tipping points for global soil nitrogen-fixing microorganisms
Summary: Nitrogen-fixing microorganisms (NFMs) are important components of soil N sinks and are influenced by multiple environmental factors. We established a random forest model optimized by the distributed delayed particle swarm optimization (RODDPSO) algorithm to analyze the global NFM data. Soil...
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Elsevier
2025-01-01
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| Series: | iScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S258900422402861X |
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| author | Yueqi Hao Hao Liu Jiawei Li Li Mu |
| author_facet | Yueqi Hao Hao Liu Jiawei Li Li Mu |
| author_sort | Yueqi Hao |
| collection | DOAJ |
| description | Summary: Nitrogen-fixing microorganisms (NFMs) are important components of soil N sinks and are influenced by multiple environmental factors. We established a random forest model optimized by the distributed delayed particle swarm optimization (RODDPSO) algorithm to analyze the global NFM data. Soil pH, organic carbon (OC), mean annual precipitation (MAP), altitude, and total phosphorus (TP) are factors with contributions greater than 10% to NFMs. pH, OC, and MAP are the top three factors at the global scale. The tipping points of pH and OC for the NFMs were 7.84 and 2.71%, respectively. The contribution of MAP first increased but then decreased with peak value at 1,265.65 mm. Under the scenario SSP 8.5, 12% of the NFMs increase occur in Africa in 2100; 16% and 36% of the NFMs decrease in North America and Oceania in 2100, respectively. Our work created a global NFMs map and identified the critical tipping points. |
| format | Article |
| id | doaj-art-e49d7d182c774eb4b834113634808992 |
| institution | DOAJ |
| issn | 2589-0042 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj-art-e49d7d182c774eb4b8341136348089922025-08-20T02:45:54ZengElsevieriScience2589-00422025-01-0128111163410.1016/j.isci.2024.111634Environmental tipping points for global soil nitrogen-fixing microorganismsYueqi Hao0Hao Liu1Jiawei Li2Li Mu3Key Laboratory for Environmental Factors Control of Agro-product Quality Safety (Ministry of Agriculture and Rural Affairs), Tianjin Key Laboratory of Agro-environment and Safe-product, Institute of Agro-environmental Protection, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300080, ChinaKey Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300080, ChinaKey Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300080, ChinaKey Laboratory for Environmental Factors Control of Agro-product Quality Safety (Ministry of Agriculture and Rural Affairs), Tianjin Key Laboratory of Agro-environment and Safe-product, Institute of Agro-environmental Protection, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; Corresponding authorSummary: Nitrogen-fixing microorganisms (NFMs) are important components of soil N sinks and are influenced by multiple environmental factors. We established a random forest model optimized by the distributed delayed particle swarm optimization (RODDPSO) algorithm to analyze the global NFM data. Soil pH, organic carbon (OC), mean annual precipitation (MAP), altitude, and total phosphorus (TP) are factors with contributions greater than 10% to NFMs. pH, OC, and MAP are the top three factors at the global scale. The tipping points of pH and OC for the NFMs were 7.84 and 2.71%, respectively. The contribution of MAP first increased but then decreased with peak value at 1,265.65 mm. Under the scenario SSP 8.5, 12% of the NFMs increase occur in Africa in 2100; 16% and 36% of the NFMs decrease in North America and Oceania in 2100, respectively. Our work created a global NFMs map and identified the critical tipping points.http://www.sciencedirect.com/science/article/pii/S258900422402861XBiogeochemistryBiogeoscienceGlobal changeGlobal Nutrient CycleMicrobiology |
| spellingShingle | Yueqi Hao Hao Liu Jiawei Li Li Mu Environmental tipping points for global soil nitrogen-fixing microorganisms iScience Biogeochemistry Biogeoscience Global change Global Nutrient Cycle Microbiology |
| title | Environmental tipping points for global soil nitrogen-fixing microorganisms |
| title_full | Environmental tipping points for global soil nitrogen-fixing microorganisms |
| title_fullStr | Environmental tipping points for global soil nitrogen-fixing microorganisms |
| title_full_unstemmed | Environmental tipping points for global soil nitrogen-fixing microorganisms |
| title_short | Environmental tipping points for global soil nitrogen-fixing microorganisms |
| title_sort | environmental tipping points for global soil nitrogen fixing microorganisms |
| topic | Biogeochemistry Biogeoscience Global change Global Nutrient Cycle Microbiology |
| url | http://www.sciencedirect.com/science/article/pii/S258900422402861X |
| work_keys_str_mv | AT yueqihao environmentaltippingpointsforglobalsoilnitrogenfixingmicroorganisms AT haoliu environmentaltippingpointsforglobalsoilnitrogenfixingmicroorganisms AT jiaweili environmentaltippingpointsforglobalsoilnitrogenfixingmicroorganisms AT limu environmentaltippingpointsforglobalsoilnitrogenfixingmicroorganisms |