Variations of N2O fluxes in response to warming and cooling in an alpine meadow on the Tibetan Plateau

	Variations of N2O fluxes in response to warming and cooling in an alpine meadow on the Tibetan Plateau
	Wang, Zengru 4,5; Xu, Guangping 8; Du, Mingyuan 3; Dijkstra, Feike A.2; Wang, Qi 7; Hu, Yigang 4,5; Zhang, Zhenhua 6; Wang, Shiping 1,7; Zhang, Zhishan 4,5
刊名	CLIMATIC CHANGE
	2017-07-01
卷号	143 期号:1-2 页码:129-142
英文摘要	Little is known about the impacts of climate change especially for cooling on N2O emissions from alpine meadows on the Tibetan Plateau. Along a slope of Qilian mountains, China, we transferred intact soil cores covering different vegetation types (graminoid, shrub, forb, and sparse vegetation) downhill (warming) and uphill (cooling) across a 600-m elevation gradient to examine the responses of soil-atmosphere N2O exchange rates to climate warming and cooling. N2O fluxes were measured during two growing seasons from May to October in 2008 and 2009. The Tibetan alpine meadow acted as a net N2O source at an average rate of 5.2 mu g m(-2) h(-1) (ranging from 2.0 to 11.5 mu g m(-2) h(-1)). In situ N2O emission generally decreased with elevation increase except for sparse vegetation, but significant differences were only found between graminoid and other three vegetations in 2008 and between graminoid and shrub vegetation in 2009. Warming averagely increased mean N2O fluxes by 219% (ranging from 126 to 287%) while cooling decreased it by 75% (ranging from 57 to 95%) across four vegetation types over the variation of soil temperature from 1.3 to 5.5 A degrees C. However, opposite effects were also observed in some cases due to modification of variations in soil moisture. Soil temperature and moisture had a positive effect on N2O fluxes and explained 48 and 26% of the variation in mean N2O fluxes across the four vegetation types, respectively. No relationship was found between mean N2O fluxes and aboveground biomass. Our results suggest that more N2O-N would be released from soil in a warmer future and that less N2O emission during cool and dry years is expected in the Tibetan alpine meadow.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]	Environmental Sciences ; Meteorology & Atmospheric Sciences
研究领域[WOS]	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
关键词[WOS]	SOIL-ATMOSPHERE EXCHANGE ; NITROUS-OXIDE EMISSIONS ; RECIPROCAL TRANSLOCATION EXPERIMENT ; COLORADO SHORTGRASS STEPPE ; CLIMATE-CHANGE ; CARBON-DIOXIDE ; SPECIES COMPOSITION ; ELEVATION GRADIENT ; FOREST SOIL ; FREEZE-THAW
收录类别	SCI
语种	英语
WOS记录号	WOS:000404605300010
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/7082]
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
作者单位	1.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 2.Univ Sydney, Sch Environm & Life Sci, Ctr Carbon Water & Food, Camden, NSW 2570, Australia 3.Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan 4.Chinese Acad Sci, Shapotou Desert Res & Expt Stn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 5.Key Lab Stress Physiol & Ecol Cold & Arid Reg Gan, Lanzhou 730000, Peoples R China 6.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 101001, Peoples R China 7.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China 8.Chinese Acad Sci, Guangxi Inst Bot, Guilin 541006, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zengru,Xu, Guangping,Du, Mingyuan,et al. Variations of N2O fluxes in response to warming and cooling in an alpine meadow on the Tibetan Plateau[J]. CLIMATIC CHANGE,2017,143(1-2):129-142.
APA	Wang, Zengru.,Xu, Guangping.,Du, Mingyuan.,Dijkstra, Feike A..,Wang, Qi.,...&Zhang, Zhishan.(2017).Variations of N2O fluxes in response to warming and cooling in an alpine meadow on the Tibetan Plateau.CLIMATIC CHANGE,143(1-2),129-142.
MLA	Wang, Zengru,et al."Variations of N2O fluxes in response to warming and cooling in an alpine meadow on the Tibetan Plateau".CLIMATIC CHANGE 143.1-2(2017):129-142.