Moderate grazing has little effect on global warming potential in the temperate steppes of northern China

doi:10.1016/j.atmosenv.2018.07.055

	Moderate grazing has little effect on global warming potential in the temperate steppes of northern China
	Hou, Longyu 1; Li, Yang 2; Shi, Huiqiu 1; Tian, Dashuan 3; Wang, Bingxue 3; Li, Linghao 1; Zhang, Lihua 1
刊名	ATMOSPHERIC ENVIRONMENT
	2018-10-01
卷号	190 页码:342-348
关键词	Greenhouse gas Global warming potential Summer grazing Temperate steppe
ISSN号	1352-2310
DOI	10.1016/j.atmosenv.2018.07.055
通讯作者	Li, Linghao(llinghao@ibcas.ac.cn) ; Zhang, Lihua(zhanglihua@ibcas.ac.cn)
英文摘要	Grazing has been reported to significantly affect the flux of three greenhouse gases (GHGs: CO2, CH4 and N2O) in grasslands, but its effect on total global warming potential (GWP) is still unclear. To assess the effect of grazing on GWP, we simultaneously measured the flux of these three GHGs using static chambers in meadow, typical, and desert steppes under no grazing (NG) and summer grazing (SG) conditions during the 2012-14 growing seasons. We aimed to examine the impact of grazing on total GWP across different steppes and to assess the relative contribution of different environmental factors to changes in GWP. Our results showed that total GWP values were almost entirely negative in all steppe environments and displayed high spatio-temporal variability. Net ecosystem exchange was the most important predictor of total GWP in all three steppes, and the positive GWP induced by N2O emission was approximately equal to the negative GWP induced by CH4 uptake. Steppe type and sampling year-but not grazing treatment-were found to affect GWP. Air temperature and precipitation were the major factors driving total GWP change under the no grazing treatment. In contrast, soil temperature, soil moisture, and precipitation explained a significant percentage of variation in total GWP under the summer grazing treatment. Our study suggests that moderate grazing does not change the role of temperate steppe's function in mitigating climate change; however, multi-year GWP data are necessary for extrapolation to a regional scale.
资助项目	National Key Research and Development Project[2016YFC0500601] ; National Natural Science Foundation of China[31500393]
WOS关键词	GREENHOUSE-GAS FLUXES ; SEMIARID GRASSLAND ; CONTINENTAL STEPPE ; GROWING-SEASON ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; NITROUS-OXIDE ; N2O FLUXES ; CH4 ; CO2
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000444659400033
资助机构	National Key Research and Development Project ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/52921]
专题	中国科学院地理科学与资源研究所
通讯作者	Li, Linghao; Zhang, Lihua
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Inst Bot Shaanxi Prov, Xian Bot Garden Shaanxi Prov, Xian 710061, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Hou, Longyu,Li, Yang,Shi, Huiqiu,et al. Moderate grazing has little effect on global warming potential in the temperate steppes of northern China[J]. ATMOSPHERIC ENVIRONMENT,2018,190:342-348.
APA	Hou, Longyu.,Li, Yang.,Shi, Huiqiu.,Tian, Dashuan.,Wang, Bingxue.,...&Zhang, Lihua.(2018).Moderate grazing has little effect on global warming potential in the temperate steppes of northern China.ATMOSPHERIC ENVIRONMENT,190,342-348.
MLA	Hou, Longyu,et al."Moderate grazing has little effect on global warming potential in the temperate steppes of northern China".ATMOSPHERIC ENVIRONMENT 190(2018):342-348.