Mapping hotspots and identifying drivers of lead bioaccumulation in Oryza sativa L. in tropical agroecosystems
文献类型：期刊论文
| 作者 | Guo, Yan1,2; Yang, Yi1; Li, You1; Liao, Xiaoyong1; Li, Yonghua1 |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2025-09-15 |
| 卷号 | 496页码:139387 |
| 关键词 | Lead Bioaccumulation factor Hotspots identification Machine learning Shapley Additive Explanations |
| ISSN号 | 0304-3894 |
| DOI | 10.1016/j.jhazmat.2025.139387 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Tropical rice systems exhibit high annual rates of heavy metal accumulation, requiring accurate identification of accumulation drivers in rice-growing ecosystems to ensure regional food security. Therefore, we collected 229 paired soil and rice samples across Hainan Island, China, revealing distinct spatial patterns of Pb contamination hotspots. By integrating 21 environmental variables, nine machine learning models were systematically compared, with the random forest algorithm emerging superior (R2 = 0.842, RMSE = 0.010). Analyses showed that despite a low mean bioaccumulation factor (0.011), 11.4 % of the soils and 22.7 % of the brown rice grains exceeded national Pb limits. Geospatial profiling identified northwestern regions as primary soil Pb hotspots, whereas rice Pb bioaccumulation exhibited tripartite clustering in northwestern, southwestern, and western zones. Mechanistic interpretation via Feature importance and Shapley additive explanations highlighted soil Pb concentrations, annual precipitation, and mean temperature as pivotal bioaccumulation regulators. To mitigate risks, targeted agronomic strategies-including pH optimization and calcium-selenium enrichment-are proposed to immobilize Pb in tropical soils. This predictive framework quantifies Pb concentrations in rice, explains contamination mechanisms, and provides actionable insights for heavy metal management in island agroecosystems. |
| URL标识 | 查看原文 |
| WOS关键词 | HEAVY-METALS ; SOIL ; CADMIUM ; BIOAVAILABILITY ; RICE ; GRAIN ; PB ; BIOACCESSIBILITY ; MODELS ; SYSTEM |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001584249000005 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/217552]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Yang, Yi; Li, Yonghua |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, 11 Datun Rd, Beijing 100101, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Yan,Yang, Yi,Li, You,et al. Mapping hotspots and identifying drivers of lead bioaccumulation in Oryza sativa L. in tropical agroecosystems[J]. JOURNAL OF HAZARDOUS MATERIALS,2025,496:139387. |
| APA | Guo, Yan,Yang, Yi,Li, You,Liao, Xiaoyong,&Li, Yonghua.(2025).Mapping hotspots and identifying drivers of lead bioaccumulation in Oryza sativa L. in tropical agroecosystems.JOURNAL OF HAZARDOUS MATERIALS,496,139387. |
| MLA | Guo, Yan,et al."Mapping hotspots and identifying drivers of lead bioaccumulation in Oryza sativa L. in tropical agroecosystems".JOURNAL OF HAZARDOUS MATERIALS 496(2025):139387. |
入库方式： OAI收割
来源：地理科学与资源研究所
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