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	Experimental Warming Aggravates Degradation-Induced Topsoil Drought in Alpine Meadows of the Qinghai-Tibetan Plateau
	Xue, Xian; You, Quangang; Peng, Fei; Dong, Siyang; Duan, Hanchen
刊名	LAND DEGRADATION & DEVELOPMENT
	2017-11-01
卷号	28期号:8页码:2343-2353
关键词	active layer degradation heat and water flux manipulative experiment soil texture
ISSN号	1085-3278
DOI	10.1002/ldr.2763
通讯作者	Xue, Xian(xianxue@lzb.ac.cn)
英文摘要	Climatic warming is presumed to cause topsoil drought by increasing evapotranspiration and water infiltration, and by progressively inducing land degradation in alpine meadows of the Qinghai-Tibetan Plateau. However, how soil moisture and temperature patterns of degraded alpine meadows respond to climate warming remains unclear. A 6-year continuous warming experiment was carried out in both degraded and undegraded alpine meadows in the source region of the Yangtze River. The goal was to identify the effects of climatic warming and land degradation on soil moisture (), soil surface temperature (T-sfc), and soil temperature (T-s). In the present study, land degradation significantly reduced by 45-61% at a depth of 0-100cm (p<0001) and increased the annual mean T-sfc by 08 degrees C. Warming with an infrared heater (radiation output of 150Wm(-2)) significantly increased the annual mean T-sfc by 25 degrees C (p<0001) and significantly increased by 47% at a depth of 40-60cm. Experimental warming in degraded land reversed the positive effects of the infrared heater and caused the yearly average to decrease significantly by 37-81% at a depth of 0-100cm. Our research reveals that land degradation caused a significant water deficit near the soil surface. Experimental warming aggravated topsoil drought caused by land degradation, intensified the magnitude of degradation, and caused a positive feedback in the degraded alpine meadow ecosystem. Therefore, an immediate need exists to restore degraded alpine meadow grasslands in the Qinghai-Tibetan Plateau in anticipation of a warmer future. Copyright (c) 2017 John Wiley & Sons, Ltd.
收录类别	SCI
WOS关键词	3-RIVERS HEADWATER REGION ; ACTIVE-LAYER THICKNESS ; CLIMATE-CHANGE ; VEGETATION DYNAMICS ; DRIVING FORCES ; CHINA ; PERMAFROST ; DESERTIFICATION ; GRASSLAND ; ECOSYSTEM
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS类目	Environmental Sciences ; Soil Science
语种	英语
出版者	WILEY
WOS记录号	WOS:000414626400002
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557628
专题	寒区旱区环境与工程研究所
通讯作者	Xue, Xian
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, Key Lab Desert & Desertificat, 320 West Donggang Rd, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Xue, Xian,You, Quangang,Peng, Fei,et al. Experimental Warming Aggravates Degradation-Induced Topsoil Drought in Alpine Meadows of the Qinghai-Tibetan Plateau[J]. LAND DEGRADATION & DEVELOPMENT,2017,28(8):2343-2353.
APA	Xue, Xian,You, Quangang,Peng, Fei,Dong, Siyang,&Duan, Hanchen.(2017).Experimental Warming Aggravates Degradation-Induced Topsoil Drought in Alpine Meadows of the Qinghai-Tibetan Plateau.LAND DEGRADATION & DEVELOPMENT,28(8),2343-2353.
MLA	Xue, Xian,et al."Experimental Warming Aggravates Degradation-Induced Topsoil Drought in Alpine Meadows of the Qinghai-Tibetan Plateau".LAND DEGRADATION & DEVELOPMENT 28.8(2017):2343-2353.

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