Nitrogen addition favors terrestrial ecosystem carbon sink: A global meta-analysis
文献类型：期刊论文
| 作者 | Liu, Junjie; Dai, Licong; Chen, Qiaoyan; Guo, Xiaowei
|
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2024 |
| 卷号 | 948 |
| 英文摘要 | Long-term atmospheric nitrogen (N) deposition has been known to enhance plant productivity by increasing available N in terrestrial ecosystems. However, the response of carbon process to N deposition in terrestrial ecosystems remains unclear, particularly about different climate regions and biomes. In this study, we synthesized 1281 pairwise observations from 218 published articles on experimental N addition globally, aiming to quantify the responses of the carbon process and its mechanisms to N addition. Our results revealed a significant overall increase in net ecosystem productivity (NEP) by 31.42 % following N addition treatment, owing to increased aboveground net primary productivity (ANPP, 16.46 %), belowground net primary productivity (BNPP, 27.74 %), and reduced soil respiration (Rs, R s ,-2.56 %), soil heterotrophic respiration (Rh, R h ,-6.24 %). Furthermore, the effects of N addition on NEP varied with biomes and climate regions. The positive effect of N addition on NEP was more pronounced in arid regions (28.67 %) compared to humid regions (21.92 %), primarily driven by a higher increase in vegetation productivity. Additionally, N addition exhibited a higher increase in NEP (33.95 %) in forest compared to grassland (31.80 %), resulting from a more reduction in respiratory processes. However, the positive effects of N addition on NEP diminished with increasing experimental duration. Furthermore, ANPP and BNPP displayed a convex relationship with N addition rates, with the optimum BNPP addition rate exceeding that of ANPP. In contrast, R s exhibited a concave response to addition rates. These findings suggest that carbon sink in terrestrial ecosystems could be enhanced under future atmospheric N deposition, especially in arid regions and forest ecosystems. Our study provided insight for predicting how N deposition influences terrestrial ecosystem carbon process. |
| 源URL | [http://210.75.249.4/handle/363003/61989]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 推荐引用方式 GB/T 7714 | Liu, Junjie,Dai, Licong,Chen, Qiaoyan,et al. Nitrogen addition favors terrestrial ecosystem carbon sink: A global meta-analysis[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,948. |
| APA | Liu, Junjie,Dai, Licong,Chen, Qiaoyan,&Guo, Xiaowei.(2024).Nitrogen addition favors terrestrial ecosystem carbon sink: A global meta-analysis.SCIENCE OF THE TOTAL ENVIRONMENT,948. |
| MLA | Liu, Junjie,et al."Nitrogen addition favors terrestrial ecosystem carbon sink: A global meta-analysis".SCIENCE OF THE TOTAL ENVIRONMENT 948(2024). |
入库方式： OAI收割
来源：西北高原生物研究所
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