| Annual methane emissions from degraded alpine wetlands in the eastern Tibetan Plateau | |
Zhang, Han1,2; Yao, Zhisheng2; Ma, Lei2,3; Zheng, Xunhua2,3; Wang, Rui2; Wang, Kai2; Liu, Chunyan2; Zhang, Wei2; Zhu, Bo4 ; Tang, Xiangyu4; Hu, Zhenghua1; Han, Shenghui2
| |
| Corresponding Author | Zheng, Xunhua(xunhua.zheng@post.iap.ac.cn) |
| 2019-03-20 | |
| Source Publication | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| ISSN | 0048-9697 |
| Volume | 657Pages:1323-1333 |
| Abstract | Grazing-oriented drainage of alpine/boreal wetlands has been broadly implemented to meet the increasing demand for animal products. However, the annual methane (CH4) emissions from alpine fens degraded due to drainage for grazing have not been well characterized clue to a lack of year-round observations. In this study, the year-round CH4 fluxes from a degraded alpine fen that is typical in the Tibetan Plateau (TP) were measured. The temperature sensitivity of the CH4 emissions during the nongrowing season (NGS) was different between the microsites with and without CH4 uptake during the growing season (GS), showing apparent activation energy of 59-61 vs. 22-43 kJ mol(-1) (or variation folds induced by the 10-degree change (i.e., Q(10)): 2.61-2.74 vs. 1.38-1.91). The CH4 emissions amounted to 0.2-63.3 kg C ha(-1) yr(-1) (with 0.8 to 41.4 kg C ha(-1) and 0.9 to 21.9 kg C ha(-1) in the GS and NGS, respectively), which were significantly (P < 0.05) related to the distances to the drainage ditch or water tables across the six microsites. As a key factor, the water table determined the role of the CH4 emissions during freezing/thawing. For cool/cold/alpine wetlands with no CH4 uptake in the GS, a mean factor of 1.52 (within a range of 1.00-2.44 at the 95% confidence interval), corresponding to an NGS contribution of 34% (ranging from 0 to 59%), was recommended to upscale the GS emissions to annual totals. Degradation of the native peat marshes in the Zoige region (originally the largest area of alpine wetlands) due to intentional drainage has greatly reduced the quantities of CH4 emissions. Additional studies are still needed to minimize the large uncertainties in CH4 emissions estimates for the changes in alpine wetlands in this region and for the entire TP. (C) 2018 Elsevier B.V. All rights reserved. |
| Keyword | Methane Nongrowing season Wetland drainage Alpine peat lands Tibetan Plateau Annual flux multiplier |
| DOI | 10.1016/j.scitotenv.2018.11.443 |
| Indexed By | SCI |
| WOS Keyword | ATMOSPHERE EXCHANGE ; NORTHERN PEATLAND ; CARBON-DIOXIDE ; NITROUS-OXIDE ; CH4 EMISSIONS ; GAS EMISSIONS ; FLUXES ; BOREAL ; ZOIGE ; N2O |
| Language | 英语 |
| Funding Project | Ministry of Science and Technology of China[2016YFA0602303] ; Ministry of Science and Technology of China[2012CB417100] ; National Natural Science Foundation of China[41603075] ; National Natural Science Foundation of China[41375152] ; National Natural Science Foundation of China[41321064] |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS Subject | Environmental Sciences |
| WOS ID | WOS:000455903400129 |
| Funding Organization | Ministry of Science and Technology of China ; National Natural Science Foundation of China |
| Publisher | ELSEVIER SCIENCE BV |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/24979 |
| Collection | 山地表生过程与生态调控重点实验室 |
| Corresponding Author | Zheng, Xunhua |
| Affiliation | 1.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Coll Appl Meteorol, Nanjing 210044, Jiangsu, Peoples R China 2.Chinese Acad Sci, State Key Lab Atmospher Boundary Layer Phys & Atm, Inst Atmospher Phys, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Han,Yao, Zhisheng,Ma, Lei,et al. Annual methane emissions from degraded alpine wetlands in the eastern Tibetan Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,657:1323-1333. |
| APA | Zhang, Han.,Yao, Zhisheng.,Ma, Lei.,Zheng, Xunhua.,Wang, Rui.,...&Han, Shenghui.(2019).Annual methane emissions from degraded alpine wetlands in the eastern Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,657,1323-1333. |
| MLA | Zhang, Han,et al."Annual methane emissions from degraded alpine wetlands in the eastern Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 657(2019):1323-1333. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Annual methane emiss（8802KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment