High-resolution maps of vegetation nitrogen density on the Tibetan Plateau: An intensive field-investigation
文献类型：期刊论文
| 作者 | Li, Xin2,3; Xu, Li3; Li, Mingxu3; He, Nianpeng1,2,3 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-12-15 |
| 卷号 | 904页码:9 |
| ISSN号 | 0048-9697 |
| 关键词 | Tibetan Plateau Nitrogen Density Storage Machine learning |
| DOI | 10.1016/j.scitotenv.2023.167233 |
| 通讯作者 | Xu, Li(xuli@igsnrr.ac.cn) ; He, Nianpeng(henp@igsnrr.ac.cn) |
| 英文摘要 | Nitrogen (N) is a vital macronutrient in plant growth and development that plays a crucial role in the regulation of numerous physiological processes. The Tibetan Plateau is among the most species-diverse vegetation zones in the world, and is sensitive to climate change; however, research on vegetation N in the region remains limited. This study used field grid-sampling of 2040 plant communities to investigate the spatial variation and driving factors of vegetation N on the Tibetan Plateau. The results yielded an average N content, density and storage in vegetation of 8.48 mg g(-1), 27.02 g m(-2), and 29.84Tg, respectively. The ratio-based optimal partitioning hypothesis appears to be more suitable than the isometric allocation hypothesis to explain variation in vegetation N on the Tibetan Plateau. Variation in vegetation N density, was influenced by several environmental factors of which the most significant was radiation. Based on these results, a Random Forest model was used to predict a N density distribution map at 1 km resolution, achieving an accuracy (R-2) of 0.72 (aboveground N density), 0.61 (belowground N density), and 0.69 (total vegetation N density). Trends for high densities were predicted in the southeast and low densities in the northwest of the region. Our findings and maps could be used to provide key N cycle parameters, contributing to future remote sensing, radar analyses, modeling and ecological management. |
| WOS关键词 | BIOMASS ALLOCATION ; PLANT NITROGEN ; USE EFFICIENCY ; LEAVES ; ROOTS ; PHOSPHORUS ; RESPONSES ; VARIABILITY ; GRADIENTS ; CLIMATE |
| 资助项目 | Natural Science Foundation of China[32171544] ; Natural Science Foundation of China[42141004] ; Natural Science Foundation of China[31988102] ; second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK060602] ; National Science and Technology Basic Resources Survey Program of China[2019FY101300] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001085037000001 |
| 资助机构 | Natural Science Foundation of China ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Science and Technology Basic Resources Survey Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/199330]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Xu, Li; He, Nianpeng |
| 作者单位 | 1.Northeast Forestry Univ, Ctr Ecol Res, Harbin 150040, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 10049, Peoples R China 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xin,Xu, Li,Li, Mingxu,et al. High-resolution maps of vegetation nitrogen density on the Tibetan Plateau: An intensive field-investigation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,904:9. |
| APA | Li, Xin,Xu, Li,Li, Mingxu,&He, Nianpeng.(2023).High-resolution maps of vegetation nitrogen density on the Tibetan Plateau: An intensive field-investigation.SCIENCE OF THE TOTAL ENVIRONMENT,904,9. |
| MLA | Li, Xin,et al."High-resolution maps of vegetation nitrogen density on the Tibetan Plateau: An intensive field-investigation".SCIENCE OF THE TOTAL ENVIRONMENT 904(2023):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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