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学科主题: 生物科学::普通生物学
题名: Variations of N2O fluxes in response to warming and cooling in an alpine meadow on the Tibetan Plateau
作者: Hu, YG (Hu, Yigang)1, 2; Zhang, ZH (Zhang, Zhenhua)1, 3; Wang, Q (Wang, Qi)4; Wang, SP (Wang, Shiping)4, 5; Zhang, ZS (Zhang, Zhishan)2; Wang, ZR (Wang, Zengru)1, 2; Xu, GP (Xu, Guangping)6; Du, MY (Du, Mingyuan)7; Dijkstra, FA (Dijkstra, Feike A.)8
通讯作者: Hu, YG
关键词: SOIL-ATMOSPHERE EXCHANGE ; NITROUS-OXIDE EMISSIONS ; RECIPROCAL TRANSLOCATION EXPERIMENT ; COLORADO SHORTGRASS STEPPE ; CLIMATE-CHANGE ; CARBON-DIOXIDE ; SPECIES COMPOSITION ; ELEVATION GRADIENT ; FOREST SOIL ; FREEZE-THAW
刊名: CLIMATIC CHANGE
发表日期: 2017
DOI: 10.1007/s10584-017-1987-z
卷: 143, 期:1-2, 页:129-142
收录类别: SCI
合作性质: 国际
文章类型: Article
类目[WOS]: Environmental Sciences; Meteorology & Atmospheric Sciences
研究领域[WOS]: Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
英文摘要: Little is known about the impacts of climate change especially for cooling on N2O emissions from alpine meadows on the Tibetan Plateau. Along a slope of Qilian mountains, China, we transferred intact soil cores covering different vegetation types (graminoid, shrub, forb, and sparse vegetation) downhill (warming) and uphill (cooling) across a 600-m elevation gradient to examine the responses of soil-atmosphere N2O exchange rates to climate warming and cooling. N2O fluxes were measured during two growing seasons from May to October in 2008 and 2009. The Tibetan alpine meadow acted as a net N2O source at an average rate of 5.2 mu g m(-2) h(-1) (ranging from 2.0 to 11.5 mu g m(-2) h(-1)). In situ N2O emission generally decreased with elevation increase except for sparse vegetation, but significant differences were only found between graminoid and other three vegetations in 2008 and between graminoid and shrub vegetation in 2009. Warming averagely increased mean N2O fluxes by 219% (ranging from 126 to 287%) while cooling decreased it by 75% (ranging from 57 to 95%) across four vegetation types over the variation of soil temperature from 1.3 to 5.5 A degrees C. However, opposite effects were also observed in some cases due to modification of variations in soil moisture. Soil temperature and moisture had a positive effect on N2O fluxes and explained 48 and 26% of the variation in mean N2O fluxes across the four vegetation types, respectively. No relationship was found between mean N2O fluxes and aboveground biomass. Our results suggest that more N2O-N would be released from soil in a warmer future and that less N2O emission during cool and dry years is expected in the Tibetan alpine meadow.
语种: 英语
WOS记录号: WOS:000404605300010
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/8048
Appears in Collections:图书馆_期刊论文

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

Recommended Citation:
Hu, YG ,Zhang, ZH ,Wang, Q ,et al. Variations of N2O fluxes in response to warming and cooling in an alpine meadow on the Tibetan Plateau[J]. CLIMATIC CHANGE,2017,143(1-2):129-142.
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