气候变化领域集成服务门户(CCPortal): Asymmetric responses of methane uptake to climate warming and cooling of a Tibetan alpine meadow assessed through a reciprocal translocation along an elevation gradient

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DOI	10.1007/s11104-016-2791-7
	Asymmetric responses of methane uptake to climate warming and cooling of a Tibetan alpine meadow assessed through a reciprocal translocation along an elevation gradient
	Hu, Yigang; Wang, Qi; Wang, Shiping; Zhang, Zhenhua; Dijkstra, Feike A.; Zhang, Zhishan; Xu, Guangping; Duan, Jichuang; Du, Mingyuan; Niu, Haishan
通讯作者	Wang, SP (通讯作者)
发表日期	2016
ISSN	0032-079X
EISSN	1573-5036
起始页码	263
结束页码	275
卷号	402 期号:1-2
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.
关键词	GREENHOUSE-GAS FLUXES TEMPERATURE SENSITIVITY N2O FLUXES SOIL CONSUMPTION ECOSYSTEM CH4 EMISSION PLATEAU TRANSPLANT
英文关键词	Climate change; Reciprocal translocation; Methane uptake; Asymmetry; Alpine meadow; Tibetan plateau
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:000374404100018
来源期刊	PLANT AND SOIL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258838
推荐引用方式 GB/T 7714	Hu, Yigang,Wang, Qi,Wang, Shiping,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]. 中国科学院青藏高原研究所,2016,402(1-2).
APA	Hu, Yigang.,Wang, Qi.,Wang, Shiping.,Zhang, Zhenhua.,Dijkstra, Feike A..,...&Niu, Haishan.(2016).Asymmetric responses of methane uptake to climate warming and cooling of a Tibetan alpine meadow assessed through a reciprocal translocation along an elevation gradient.PLANT AND SOIL,402(1-2).
MLA	Hu, Yigang,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".PLANT AND SOIL 402.1-2(2016).