Experimental Warming Increases Seasonal Methane Uptake in an Alpine Meadow on the Tibetan Plateau

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	Experimental Warming Increases Seasonal Methane Uptake in an Alpine Meadow on the Tibetan Plateau
	Lin, Xingwu 1; Wang, Shiping 2,4; Hu, Yigang 5; Luo, Caiyun 3; Zhang, Zhenhua 3; Niu, Haishan 6; Xie, Zubin 1
	2015-03-01
发表期刊	ECOSYSTEMS
卷号	18 期号:2 页码:274-286
文章类型	Article
摘要	Increased understanding of the response of soil methane (CH4) uptake in alpine meadow ecosystems to warming and grazing could reduce uncertainty in estimates of the soil-atmospheric CH4 budget. To determine the effects of warming and grazing on soil CH4 uptake at different timescales (that is, daily, monthly, seasonal, and annual), we conducted a controlled warming and grazing experiment [that is, no warming with no grazing (NWNG), no warming with grazing (NWG), warming with no grazing (WNG), and warming with grazing (WG)] in an alpine meadow on the Tibetan plateau from 2006 to 2009. Soil CH4 uptake was mainly affected by warming and sample date and their interaction. Warming treatment regardless of grazing significantly increased seasonal average CH4 uptake by 31-39% during the growing season (from May to September) and by 162% during the non-growing season (from October to April next year) in 2007-2008, whereas only WNG increased seasonal average CH4 uptake by 87-138% compared with NWNG during the non-growing seasons in 2006-2007 and 2008-2009. Warming in WNG and WG increased annual CH4 uptake by 50-87% compared with NWNG or NWG. Moreover, warming regardless of grazing and warming with grazing (compared with NWNG) significantly increased the contribution to annual uptake of CH4 uptake during the non-growing season in 2007-2008 and 2008-2009. However, moderate grazing did not significantly influence soil CH4 uptake, although grazing with warming decreased CH4 uptake by 43% during the growing season in 2006. Soil moisture explained 16-25% of the CH4 variation during the growing season, but there was no significant relationship between soil CH4 uptake and soil moisture during the non-growing season. Our results suggest that more attention should be paid to the stimulating effect of warming on soil CH4 uptake during the non-growing season due to its greater response to warming and different stimulating mechanisms compared to responses during the growing season in the alpine meadow.; Increased understanding of the response of soil methane (CH4) uptake in alpine meadow ecosystems to warming and grazing could reduce uncertainty in estimates of the soil-atmospheric CH4 budget. To determine the effects of warming and grazing on soil CH4 uptake at different timescales (that is, daily, monthly, seasonal, and annual), we conducted a controlled warming and grazing experiment [that is, no warming with no grazing (NWNG), no warming with grazing (NWG), warming with no grazing (WNG), and warming with grazing (WG)] in an alpine meadow on the Tibetan plateau from 2006 to 2009. Soil CH4 uptake was mainly affected by warming and sample date and their interaction. Warming treatment regardless of grazing significantly increased seasonal average CH4 uptake by 31-39% during the growing season (from May to September) and by 162% during the non-growing season (from October to April next year) in 2007-2008, whereas only WNG increased seasonal average CH4 uptake by 87-138% compared with NWNG during the non-growing seasons in 2006-2007 and 2008-2009. Warming in WNG and WG increased annual CH4 uptake by 50-87% compared with NWNG or NWG. Moreover, warming regardless of grazing and warming with grazing (compared with NWNG) significantly increased the contribution to annual uptake of CH4 uptake during the non-growing season in 2007-2008 and 2008-2009. However, moderate grazing did not significantly influence soil CH4 uptake, although grazing with warming decreased CH4 uptake by 43% during the growing season in 2006. Soil moisture explained 16-25% of the CH4 variation during the growing season, but there was no significant relationship between soil CH4 uptake and soil moisture during the non-growing season. Our results suggest that more attention should be paid to the stimulating effect of warming on soil CH4 uptake during the non-growing season due to its greater response to warming and different stimulating mechanisms compared to responses during the growing season in the alpine meadow.
关键词	Warming Grazing Ch4 Uptake Alpine Meadow Tibetan Plateau Climate Change
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]	GREENHOUSE-GAS FLUXES ; CLIMATE-CHANGE ; BIOGEOCHEMICAL CONTROLS ; N AVAILABILITY ; CARBON-DIOXIDE ; FOREST SOIL ; CONSUMPTION ; CH4 ; STEPPE ; N2O
收录类别	SCI
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:000350880400008
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/5576
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China 4.Chinese Acad Sci, Excellence Ctr, Beijing 100101, Peoples R China 5.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lin, Xingwu,Wang, Shiping,Hu, Yigang,et al. Experimental Warming Increases Seasonal Methane Uptake in an Alpine Meadow on the Tibetan Plateau[J]. ECOSYSTEMS,2015,18(2):274-286.
APA	Lin, Xingwu.,Wang, Shiping.,Hu, Yigang.,Luo, Caiyun.,Zhang, Zhenhua.,...&Xie, Zubin.(2015).Experimental Warming Increases Seasonal Methane Uptake in an Alpine Meadow on the Tibetan Plateau.ECOSYSTEMS,18(2),274-286.
MLA	Lin, Xingwu,et al."Experimental Warming Increases Seasonal Methane Uptake in an Alpine Meadow on the Tibetan Plateau".ECOSYSTEMS 18.2(2015):274-286.

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