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Heavy grazing reduces grassland soil greenhouse gas fluxes: A global meta-analysis
Tang, Shiming1,2; Wang, Kun3; Xiang, Yangzhou4; Tian, Dashuan1; Wang, Jinsong1; Liu, Yanshu5; Cao, Bo6; Guo, Ding7; Niu, Shuli1,8
2019-03-01
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume654Pages:1218-1224
Corresponding AuthorTian, Dashuan(tiands@igsnrr.ac.cn) ; Niu, Shuli(sniu@igsnrr.ac.cn)
AbstractGrazing degrades worldwide grasslands and possibly suppresses soil greenhouse gas (GHG: CO2, CH4 and N2O) fluxes. However, the global patterns of these three gas fluxes in response to grazing and the general mechanisms remain poorly understood. Here, we performed a meta-analysis of 63 independent grazing studies that measured soil GHG fluxes across global grasslands. Our results revealed that light and moderate grazing had no significant effect on soil CH4 uptake, N2O and CO2 emission, but heavy grazing consistently reduced them. The magnitudes of their responses to grazing were regulated by grazing duration and precipitation. In comparison with CO2 emission, soil CH4 uptake and N2O emission were reduced much more under heavier grazing, longer grazing duration or less precipitation. The decrease in soil CO2 emission was possibly caused by grazing-induced reduction in root biomass and soil moisture, while the decline in soil CH4 uptake and N2O emission was due to decreased soil moisture and substrate availability. Overall, this study provides the first large-scale evaluation on three main soil GHG fluxes in response to grazing, highlighting grazing inhibition of GHG emission but at the cost of plant productivity and soil fertility. We call for future efforts to identify an appropriate grazing intensity that is optimal to balance these complicated impacts. (C) 2018 Elsevier B.V. All rights reserved.
KeywordGrazing Grassland Soil respiration Methane uptake Nitrous oxide Meta-analysis
DOI10.1016/j.scitotenv.2018.11.082
WOS KeywordCARBON SEQUESTRATION ; NITROUS-OXIDE ; PLANT DIVERSITY ; STOCKING RATES ; TYPICAL STEPPE ; ECOSYSTEM ; INTENSITY ; COMMUNITY ; RESPONSES ; METHANE
Indexed BySCI
Language英语
Funding ProjectState Key Laboratory of Grassland Agro-ecosystems (Lanzhou University) ; National Natural Science Foundation of China[31625006] ; National Natural Science Foundation of China[31470528] ; National Key R&D Program of China[2016YFC0501802] ; Ministry of Science and Technology of the People's Republic of China[2016YFC0501803] ; Thousand Youth Talents Plan
Funding OrganizationState Key Laboratory of Grassland Agro-ecosystems (Lanzhou University) ; National Natural Science Foundation of China ; National Key R&D Program of China ; Ministry of Science and Technology of the People's Republic of China ; Thousand Youth Talents Plan
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000458630100113
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/49470
Collection中国科学院地理科学与资源研究所
Corresponding AuthorTian, Dashuan; Niu, Shuli
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Inner Mongolia Univ, Sch Ecol & Environm, Dept Ecol, 235 West Coll Rd, Hohhot 010021, Peoples R China
3.China Agr Univ, Grassland Dept Anim Sci & Technol Coll, Beijing 100193, Peoples R China
4.Guizhou Inst Forest Inventory & Planning, Guiyang 550003, Guizhou, Peoples R China
5.Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China
6.Orient Landscape Arts Beijing Co, Inst Ecol Planning & Design, Beijing 100015, Peoples R China
7.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Gansu, Peoples R China
8.Univ Chinese Acad Sci, Dept Resources & Environm, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Tang, Shiming,Wang, Kun,Xiang, Yangzhou,et al. Heavy grazing reduces grassland soil greenhouse gas fluxes: A global meta-analysis[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,654:1218-1224.
APA Tang, Shiming.,Wang, Kun.,Xiang, Yangzhou.,Tian, Dashuan.,Wang, Jinsong.,...&Niu, Shuli.(2019).Heavy grazing reduces grassland soil greenhouse gas fluxes: A global meta-analysis.SCIENCE OF THE TOTAL ENVIRONMENT,654,1218-1224.
MLA Tang, Shiming,et al."Heavy grazing reduces grassland soil greenhouse gas fluxes: A global meta-analysis".SCIENCE OF THE TOTAL ENVIRONMENT 654(2019):1218-1224.
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