IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Effects of warming and nitrogen fertilization on GHG flux in an alpine swamp meadow of a permafrost region
Chen, Xiaopeng1,2; Wang, Genxu1; Zhang, Tao3; Mao, Tianxu4; Wei, Da1; Song, Chunlin1,2; Hu, Zhaoyong1,2; Huang, Kewei1,2
2017
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
EISSN1879-1026
Volume601Pages:1389-1399
SubtypeArticle
AbstractUncertainties in the seasonal changes of greenhouse gases (GHG) fluxes in wetlands limit our accurate understanding of the responses of permafrost ecosystems to future warming and increased nitrogen (N) deposition. Therefore, in an alpine swamp meadow in the hinterland of the Qinghai-Tibet Plateau, a simulated warming with N fertilization experiment was conducted to investigate the key GHG fluxes (ecosystem respiration [Re], CH4 and N2O) in the early (EG), mid (MG) and late (LG) growing seasons. Results showed that warming (6.2 degrees C) increased the average seasonal Re by 30.9% and transformed the alpine swamp meadow from a N2O sink to a source, whereas CH4 flux was not significantly affected. N fertilization (4 g N m(-2) a(-1)) alone had no significant effect on the fluxes of GHGs. The interaction of warming and N fertilization increased CH4 uptake by 69.6% and N2O emissions by 26.2% compared with warming, whereas the Re was not significantly affected. During the EG, although the soil temperature sensitivity of the Re was the highest, the effect of warming on the Re was the weakest. The primary driving factor for Re was soil surface temperature, whereas soil moisture controlled CH4 flux, and the N2O flux was primarily affected by rain events. The results indicated: (i) increasing N deposition has both positive and negative feedbacks on GHG fluxes in response to climate warming; (ii) during soil thawing process at active layer, low temperature of deep frozen soils have a negative contribution to Re in alpine ecosystems; and (iii) although these alpine wetland ecosystems are buffers against increased temperature, their feedbacks on climate change cannot be ignored because of the large soil organic carbon pool and high temperature sensitivity of the Re. (C) 2017 Elsevier B.V. All rights reserved.
KeywordSimulated Warming Nitrogen Addition Greenhouse Gas Seasonal Variation
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.scitotenv.2017.06.028
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordQINGHAI-TIBETAN PLATEAU ; FREEZE-THAW CYCLES ; SOIL RESPIRATION ; ECOSYSTEM RESPIRATION ; N2O FLUXES ; CLIMATE-CHANGE ; TEMPERATURE SENSITIVITY ; MICROBIAL COMMUNITIES ; TIANSHAN MOUNTAINS ; METHANE EMISSIONS
Language英语
Quartile2区
TOP
WOS SubjectEnvironmental Sciences
WOS IDWOS:000406294900136
Funding OrganizationNational Basic Research Program of China(2013CBA01807) ; National Natural Science Foundation of China(41271224 ; National Science and Technology Support Program of China(2014BAC05B01) ; 91547203 ; 41671206)
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18960
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorWang, Genxu
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Guizhou Univ, Inst New Rural Dev, Guiyang 550025, Guizhou, Peoples R China
4.Guizhou Univ, Coll Forestry, Guiyang 550025, Guizhou, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Chen, Xiaopeng,Wang, Genxu,Zhang, Tao,et al. Effects of warming and nitrogen fertilization on GHG flux in an alpine swamp meadow of a permafrost region[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,601:1389-1399.
APA Chen, Xiaopeng.,Wang, Genxu.,Zhang, Tao.,Mao, Tianxu.,Wei, Da.,...&Huang, Kewei.(2017).Effects of warming and nitrogen fertilization on GHG flux in an alpine swamp meadow of a permafrost region.SCIENCE OF THE TOTAL ENVIRONMENT,601,1389-1399.
MLA Chen, Xiaopeng,et al."Effects of warming and nitrogen fertilization on GHG flux in an alpine swamp meadow of a permafrost region".SCIENCE OF THE TOTAL ENVIRONMENT 601(2017):1389-1399.
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