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DOI	10.1016/j.scitotenv.2024.174826
	Nitrogen addition favors terrestrial ecosystem carbon sink: A global meta-analysis
	Liu, Junjie; Dai, Licong; Chen, Qiaoyan; Guo, Xiaowei
通讯作者	Guo, XW
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	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.
英文关键词	Nitrogen deposition Net ecosystem productivity Soil respiration Terrestrial ecosystem meta-analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001275511300001
WOS关键词	SOIL RESPIRATION ; TROPICAL FOREST ; DEPOSITION ; CO2 ; PRODUCTIVITY ; TEMPERATE ; BIOMASS ; GROWTH ; SEQUESTRATION ; PATTERNS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405529
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],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).