Nitrogen addition, rather than altered precipitation, stimulates nitrous oxide emissions in an alpine steppe

NWIPB OpenIR

	Nitrogen addition, rather than altered precipitation, stimulates nitrous oxide emissions in an alpine steppe
	Yang, Yang; Xiao, Yuanming; Li, Changbin; Wang, Bo; Gao, Yongheng; Zhou, Guoying
	2021
发表期刊	ECOLOGY AND EVOLUTION
卷号	11 期号:21
摘要	Anthropogenic-driven global change, including changes in atmospheric nitrogen (N) deposition and precipitation patterns, is dramatically altering N cycling in soil. How long-term N deposition, precipitation changes, and their interaction influence nitrous oxide (N2O) emissions remains unknown, especially in the alpine steppes of the Qinghai-Tibetan Plateau (QTP). To fill this knowledge gap, a platform of N addition (10 g m(-2) year(-1)) and altered precipitation (+/- 50% precipitation) experiments was established in an alpine steppe of the QTP in 2013. Long-term N addition significantly increased N2O emissions. However, neither long-term alterations in precipitation nor the co-occurrence of N addition and altered precipitation significantly affected N2O emissions. These unexpected findings indicate that N2O emissions are particularly susceptible to N deposition in the alpine steppes. Our results further indicated that both biotic and abiotic properties had significant effects on N2O emissions. N2O emissions occurred mainly due to nitrification, which was dominated by ammonia-oxidizing bacteria, rather than ammonia-oxidizing archaea. Furthermore, the alterations in belowground biomass and soil temperature induced by N addition modulated N2O emissions. Overall, this study provides pivotal insights to aid the prediction of future responses of N2O emissions to long-term N deposition and precipitation changes in alpine ecosystems. The underlying microbial pathway and key predictors of N2O emissions identified in this study may also be used for future global-scale model studies.
关键词	climate change functional gene greenhouse gas nitrification Qinghai-Tibetan Plateau
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60695
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Yang, Yang,Xiao, Yuanming,Li, Changbin,et al. Nitrogen addition, rather than altered precipitation, stimulates nitrous oxide emissions in an alpine steppe[J]. ECOLOGY AND EVOLUTION,2021,11(21).
APA	Yang, Yang,Xiao, Yuanming,Li, Changbin,Wang, Bo,Gao, Yongheng,&Zhou, Guoying.(2021).Nitrogen addition, rather than altered precipitation, stimulates nitrous oxide emissions in an alpine steppe.ECOLOGY AND EVOLUTION,11(21).
MLA	Yang, Yang,et al."Nitrogen addition, rather than altered precipitation, stimulates nitrous oxide emissions in an alpine steppe".ECOLOGY AND EVOLUTION 11.21(2021).