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学科主题: 生物科学::普通生物学
题名: Asymmetric responses of methane uptake to climate warming and cooling of a Tibetan alpine meadow assessed through a reciprocal translocation along an elevation gradient
作者: Hu, YG (Hu, Yigang)1, 5; Wang, Q (Wang, Qi)3, 11; Wang, SP (Wang, Shiping)3, 4; Zhang, ZH (Zhang, Zhenhua)1, 2; Dijkstra, FA (Dijkstra, Feike A.)6, 7; Zhang, ZS (Zhang, Zhishan)5; Xu, GP (Xu, Guangping)8; Duan, JC (Duan, Jichuang)9; Du, MY (Du, Mingyuan)10; Niu, HS (Niu, Haishan)11
通讯作者: Wang, SP
刊名: PLANT AND SOIL
发表日期: 2016
DOI: 10.1007/s11104-016-2791-7
卷: 402, 期:1-2, 页:263-275
收录类别: SCI
合作性质: 国际
文章类型: Article
英文摘要: A lacking of understanding about cooling effects on methane (CH4) fluxes and potential asymmetrical responses to warming and cooling causes uncertainty about climate change effects on the atmospheric CH4 concentration. We investigated CH4 fluxes in an alpine meadow on the Tibetan Plateau in response to climate warming and cooling.
A 2-year reciprocal translocation experiment was implemented to simulate climate warming (i.e. downward translocation) and cooling (i.e. upward translocation) along an elevation gradient with four different vegetation types (at 3200, 3400, 3600 and 3800 m elevation) during the growing season (May to October) in 2008 and 2009.
Although the effects of warming and cooling varied depending on vegetation type, elevation and timescale (i.e., daily and seasonally), warming increased average seasonal CH4 uptake by 60 %, while cooling reduced it by 19 % across all vegetation types, based on a 1.3-5.1 A degrees C difference in soil temperature at 20 cm depth. Soil temperature over the range of 4-10 A degrees C explained 11-25 % of the variation in average seasonal CH4 fluxes, while there was no relationship with soil moisture over the range of 13-39 % and soil NH4 (+)-N and NO3 N- content. Methane uptake was more sensitive to warming than to cooling.
Because of warming and cooling spells in the alpine region, warming effects on CH4 uptake would be over-estimated by 64 % if cooling effects on it are not considered. Our findings suggest that asymmetrical responses of CH4 fluxes to warming and cooling should be taken into account when evaluating the effects of climate change on CH4 uptake in the alpine meadow on the Tibetan plateau.
语种: 英语
WOS记录号: WOS:000374404100018
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7707
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 101001, Peoples R China
4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Key Lab Stress Physiol & Ecol Cold & Arid Reg, Lanzhou 730000, Peoples R China
6.Univ Sydney, Fac Agr & Environm, Dept Environm Sci, Camden 2570, NSW, Peoples R China
7.Univ Sydney, Fac Agr & Environm, Ctr Carbon Water & Food, Camden 2570, NSW, Peoples R China
8.Chinese Acad Sci, Guangxi Inst Bot, Guilin 541006, Peoples R China
9.Binhai Res Inst Tianjin, Tianjin 300457, Peoples R China
10.Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan
11.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Hu, YG ,Wang, Q ,Wang, SP ,et al. Asymmetric responses of methane uptake to climate warming and cooling of a Tibetan alpine meadow assessed through a reciprocal translocation along an elevation gradient[J]. PLANT AND SOIL,2016,402(1-2):263-275.
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