Global patterns and substrate-based mechanisms of the terrestrial nitrogen cycle
文献类型：SCI/SSCI论文
| 作者 | Niu S. L.; Classen, A. T.; Dukes, J. S.; Kardol, P.; Liu, L. L.; Luo, Y. Q.; Rustad, L.; Sun, J.; Tang, J. W.; Templer, P. H. |
| 发表日期 | 2016 |
| 关键词 | Leaching mineralisation nitrification nitrogen deposition nitrogen loss plant N uptake saturation soil N retention threshold forest ecosystems nitrate uptake atmospheric deposition phosphorus limitation temperate forests uptake kinetics carbon-dioxide new-england oak forest saturation |
| 英文摘要 | Nitrogen (N) deposition is impacting the services that ecosystems provide to humanity. However, the mechanisms determining impacts on the N cycle are not fully understood. To explore the mechanistic underpinnings of N impacts on N cycle processes, we reviewed and synthesised recent progress in ecosystem N research through empirical studies, conceptual analysis and model simulations. Experimental and observational studies have revealed that the stimulation of plant N uptake and soil retention generally diminishes as N loading increases, while dissolved and gaseous losses of N occur at low N availability but increase exponentially and become the dominant fate of N at high loading rates. The original N saturation hypothesis emphasises sequential N saturation from plant uptake to soil retention before N losses occur. However, biogeochemical models that simulate simultaneous competition for soil N substrates by multiple processes match the observed patterns of N losses better than models based on sequential competition. To enable better prediction of terrestrial N cycle responses to N loading, we recommend that future research identifies the response functions of different N processes to substrate availability using manipulative experiments, and incorporates the measured N saturation response functions into conceptual, theoretical and quantitative analyses. |
| 出处 | Ecology Letters |
| 卷 | 19 |
| 期 | 6 |
| 页 | 697-709 |
| 语种 | 英语 |
| ISSN号 | 1461-023X |
| DOI标识 | 10.1111/ele.12591 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43153]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Niu S. L.,Classen, A. T.,Dukes, J. S.,et al. Global patterns and substrate-based mechanisms of the terrestrial nitrogen cycle. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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