气候变化领域集成服务门户(CCPortal): Nitrogen rather than phosphorous addition alters the asymmetric responses of primary productivity to precipitation variability across a precipitation gradient on the northern Tibetan Plateau

CCPortal

DOI	10.1016/j.scitotenv.2023.167856
	Nitrogen rather than phosphorous addition alters the asymmetric responses of primary productivity to precipitation variability across a precipitation gradient on the northern Tibetan Plateau
	Yu, Jialuo; Hou, Ge; Shi, Peili; Zong, Ning; Peng, Jinlong
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
卷号	907
英文摘要	Understanding the response of alpine grassland productivity to precipitation fluctuations is essential for assessing the future changes of ecosystem services. However, the underlying mechanism by which grassland productivity responds to wet and dry years after nitrogen (N) or/and phosphorus (P) nutrient addition remains unclear. In this study, we investigated the dynamics of plant communities based on eight-year N or/and P addition gradient experiments in four grassland types across a precipitation gradient on the north Tibetan Plateau. The asymmetry index (AI) was used to evaluate the responses of aboveground net primary productivity (ANPP) to precipitation fluctuations where AI > 0 indicates a greater increase of ANPP in wet years compared to the decline in dry years, and AI < 0 indicates a greater decline of ANPP in dry years compared to the increase in wet years. Our results showed that the AI values at community level in four natural grasslands were non-significant trend across the precipitation gradient, and showed slightly negative asymmetry, suggesting that the increase of ANPP in wet years was less than the decrease in dry years. N addition resulted in a significant decrease in community-level AI values with increasing mean annual precipitation (MAP), indicating that improved nutrient availability may favor the recovery of productivity in drier grasslands in wet years. At the functional group level, nutrient addition resulted in a significant decrease in the AI values of grasses and legumes and an increase in the AI values of forbs as MAP increased. Furthermore, the coupling of nutrients with precipitation can influence the productivity responses to precipitation changes by affecting soil nutrient availability and species richness. This research provides new insights into better predicting vegetation activity on N deposition rates and precipitation changes exacerbated in the context of climate change.
关键词	Asymmetric responses Aboveground net primary productivity Nutrition addition Functional groups Precipitation gradient Tibetan plateau
英文关键词	SEMIARID ECOSYSTEMS; CLIMATE; GRASSLANDS; LIMITATION; DROUGHT; BIOMASS; BIODIVERSITY; STABILITY; DYNAMICS; EVENTS
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001106105100001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283729
作者单位	Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Yu, Jialuo,Hou, Ge,Shi, Peili,et al. Nitrogen rather than phosphorous addition alters the asymmetric responses of primary productivity to precipitation variability across a precipitation gradient on the northern Tibetan Plateau[J],2024,907.
APA	Yu, Jialuo,Hou, Ge,Shi, Peili,Zong, Ning,&Peng, Jinlong.(2024).Nitrogen rather than phosphorous addition alters the asymmetric responses of primary productivity to precipitation variability across a precipitation gradient on the northern Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,907.
MLA	Yu, Jialuo,et al."Nitrogen rather than phosphorous addition alters the asymmetric responses of primary productivity to precipitation variability across a precipitation gradient on the northern Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 907(2024).