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Moderate grazing has little effect on global warming potential in the temperate steppes of northern China
Hou, Longyu1; Li, Yang2; Shi, Huiqiu1; Tian, Dashuan3; Wang, Bingxue3; Li, Linghao1; Zhang, Lihua1
2018-10-01
Source PublicationATMOSPHERIC ENVIRONMENT
ISSN1352-2310
Volume190Pages:342-348
Corresponding AuthorLi, Linghao(llinghao@ibcas.ac.cn) ; Zhang, Lihua(zhanglihua@ibcas.ac.cn)
AbstractGrazing 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.
KeywordGreenhouse gas Global warming potential Summer grazing Temperate steppe
DOI10.1016/j.atmosenv.2018.07.055
WOS KeywordGREENHOUSE-GAS FLUXES ; SEMIARID GRASSLAND ; CONTINENTAL STEPPE ; GROWING-SEASON ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; NITROUS-OXIDE ; N2O FLUXES ; CH4 ; CO2
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Project[2016YFC0500601] ; National Natural Science Foundation of China[31500393]
Funding OrganizationNational Key Research and Development Project ; National Natural Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS SubjectEnvironmental Sciences ; Meteorology & Atmospheric Sciences
WOS IDWOS:000444659400033
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/52922
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLi, Linghao; Zhang, Lihua
Affiliation1.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
Recommended Citation
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.
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