The combined effects of warming and drying suppress CO2 and N2O emission rates in an alpine meadow of the eastern Tibetan Plateau

doi:10.1007/s11284-012-0950-8

	The combined effects of warming and drying suppress CO2 and N2O emission rates in an alpine meadow of the eastern Tibetan Plateau
	Shi, Fusun 1; Chen, Huai 2; Chen, Huafeng 3; Wu, Yan 1; Wu, Ning 1
刊名	ECOLOGICAL RESEARCH
	2012-07
卷号	27 期号:4 页码:725-733
关键词	Warming Drying CO2 N2O Eastern Tibetan Plateau
ISSN号	0912-3814
DOI	10.1007/s11284-012-0950-8
产权排序	1
文献子类	Article
英文摘要	The eastern Tibetan Plateau has become increasingly warmer and drier since the 1990s. Such warming and drying has a great impact on ecosystem processes on the eastern Tibetan Plateau. To determine their combined effects on CO2 and N2O emission rates, we conducted a field manipulative experiment in an alpine meadow of the eastern Tibetan Plateau during the growing season of 2009. The experiment showed that warming manipulation increased soil temperature by 1 A degrees C, and drying manipulation decreased soil water content by 6.8 %. We found that by counteracting the effect of low temperature in the area, experimental warming significantly increased soil microbial biomass, the number of bacteria, fungi, actinomycetes, ammonifying bacteria, nitrobacteria and denitrifying bacteria, and facilitated the emission rates of CO2 and N2O by 33.4 and 31.5 %, respectively. However, decreased precipitation further aggravated soil water stress and inhibited the numbers of these organisms, and reduced the emission rates of CO2 and N2O by 47.4 and 37.9 %, respectively. So decreased soil water content tended to offset the positive effect of warming. Compared to the positive effects of warming, decreased soil water content was shown in our study to have even greater impact on the eastern Tibetan Plateau during the growing season. Therefore, inhibition of CO2 and N2O emission rates (32.3 and 29.3 %, respectively) by warming and drying will intensify if the combined effects of these climatic trends persist in the region.
学科主题	Environment ; Ecology
URL标识	查看原文
WOS关键词	SOIL RESPIRATION ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; NITROUS-OXIDE ; COMMUNITY STRUCTURE ; TALLGRASS PRAIRIE ; METHANE FLUXES ; ECOSYSTEM ; FOREST ; GRASSLAND
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SPRINGER JAPAN KK
WOS记录号	WOS:000306845600007
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/29840]
专题	成都生物研究所_生态研究
通讯作者	Wu, Ning
作者单位	1.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China; 2.NW Agr & Forest Univ, Coll Forestry, Lab Ecol Forecasting & Global Change, Yanglin 712100, Peoples R China; 3.NE Forestry Univ, Minist Educ, Key Lab Forest Plant Ecol, Harbin 150040, Peoples R China
推荐引用方式 GB/T 7714	Shi, Fusun,Chen, Huai,Chen, Huafeng,et al. The combined effects of warming and drying suppress CO2 and N2O emission rates in an alpine meadow of the eastern Tibetan Plateau[J]. ECOLOGICAL RESEARCH,2012,27(4):725-733.
APA	Shi, Fusun,Chen, Huai,Chen, Huafeng,Wu, Yan,&Wu, Ning.(2012).The combined effects of warming and drying suppress CO2 and N2O emission rates in an alpine meadow of the eastern Tibetan Plateau.ECOLOGICAL RESEARCH,27(4),725-733.
MLA	Shi, Fusun,et al."The combined effects of warming and drying suppress CO2 and N2O emission rates in an alpine meadow of the eastern Tibetan Plateau".ECOLOGICAL RESEARCH 27.4(2012):725-733.