Has nitrogen availability decreased over much of the land surface in the past century? A model-based analysis
文献类型：期刊论文
| 作者 | Vitousek, Peter M.5; Cen, Xiaoyu3,4; Groffman, Peter M.1,2 |
| 刊名 | BIOGEOCHEMISTRY
 |
| 出版日期 | 2024-05-03 |
| 页码 | 14 |
| 关键词 | Carbon dioxide Climate change Disturbance Nitrogen Nitrogen-15 Phosphorus |
| ISSN号 | 0168-2563 |
| DOI | 10.1007/s10533-024-01146-y |
| 通讯作者 | Vitousek, Peter M.(vitousek@stanford.edu) |
| 英文摘要 | A recent publication (Mason et al. in Science 376:261, 2022a) suggested that nitrogen (N) availability has declined as a consequence of multiple ongoing components of anthropogenic global change. This suggestion is controversial, because human alteration of the global N cycle is substantial and has driven much-increased fixation of N globally. We used a simple model that has been validated across a climate gradient in Hawai 'i to test the possibility of a widespread decline in N availability, the evidence supporting it, and the possible mechanisms underlying it. This analysis showed that a decrease in delta 15N is not sufficient evidence for a decline in N availability, because delta 15N in ecosystems reflects both the isotope ratios in inputs of N to the ecosystem AND fractionation of N isotopes as N cycles, with enrichment of the residual N in the ecosystem caused by greater losses of N by the fractionating pathways that are more important in N-rich sites. However, there is other evidence for declining N availability that is independent of 15N and that suggests a widespread decline in N availability. We evaluated whether and how components of anthropogenic global change could cause declining N availability. Earlier work had demonstrated that both increases in the variability of precipitation due to climate change and ecosystem-level disturbance could drive uncontrollable losses of N that reduce N availability and could cause persistent N limitation at equilibrium. Here we modelled climate-change-driven increases in temperature and increasing atmospheric concentrations of CO2. We show that increasing atmospheric CO2 concentrations can drive non-equilibrium decreases in N availability and cause the development of N limitation, while the effects of increased temperature appear to be relatively small and short-lived. These environmental changes may cause reductions in N availability over the vast areas of Earth that are not affected by high rates of atmospheric deposition and/or N enrichment associated with urban and agricultural land use. |
| WOS关键词 | PHOSPHORUS ; GROWTH ; DENITRIFICATION ; EUTROPHICATION ; NITRIFICATION ; EXPLANATIONS ; FIXATION ; PATTERNS ; FORESTS ; TRENDS |
| 资助项目 | National Science Foundation |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001217395900001 |
| 出版者 | SPRINGER |
| 资助机构 | National Science Foundation |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/205819]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Vitousek, Peter M. |
| 作者单位 | 1.Cary Inst Ecosyst Studies, Millbrook, NY 12545 USA 2.CUNY, Adv Sci Res Ctr, Grad Ctr, New York, NY 10031 USA 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 4.Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 5.Stanford Univ, Dept Earth Syst Sci, Stanford, CA 94305 USA |
| 推荐引用方式 GB/T 7714 | Vitousek, Peter M.,Cen, Xiaoyu,Groffman, Peter M.. Has nitrogen availability decreased over much of the land surface in the past century? A model-based analysis[J]. BIOGEOCHEMISTRY,2024:14. |
| APA | Vitousek, Peter M.,Cen, Xiaoyu,&Groffman, Peter M..(2024).Has nitrogen availability decreased over much of the land surface in the past century? A model-based analysis.BIOGEOCHEMISTRY,14. |
| MLA | Vitousek, Peter M.,et al."Has nitrogen availability decreased over much of the land surface in the past century? A model-based analysis".BIOGEOCHEMISTRY (2024):14. |
入库方式： OAI收割
来源：地理科学与资源研究所
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