Soil water use sources and patterns in shrub encroachment in semiarid grasslands of Inner Mongolia

doi:10.1016/j.agrformet.2021.108579

	Soil water use sources and patterns in shrub encroachment in semiarid grasslands of Inner Mongolia
	Liu, Xin 1; Zhuang, Qianlai 2,3; Lai, Liming ; Zhou, Jihua ; Sun, Qinglin 1; Yi, Sangui 1; Liu, Benben 1; Zheng, Yuanrun
	2021
发表期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
卷号	308
摘要	Soil water sources for shrub encroachment in arid and semiarid regions have not been fully understood. This study used stable delta H-2 and delta O-18 isotope ratios of plants, soil water and precipitation, coupled with proportional similarity index of species to identify relations between shrub encroachment and water sources for four shrub and grass species at various shrub encroachment stages in a semiarid grassland of Inner Mongolia. We found that shallow rooted grasses (Agriophyllum squarrosum and Stipa bungeana) predominantly used shallow soil water (0-20 cm) during growing season. In contrast, deeply-rooted semi-shrubs (Artemisia ordosica and Artemisia sphaerocephala) used middle and deep soil water in July but shallow and middle soil depth water in May and September. Plants competition for soil water in different shrub encroachment stages were different depending on plant water use sources. The highest plant competition existed in the A. ordosica community in semi-fixed sandy land, followed by A. squarrosum community in shifting sandy land, A. ordosica community in fixed sandy land, and S. bungeana community in fixed sandy land. Competition for soil water and differences of water use sources of grass and shrub species were crucial in driving shrub encroachment in semiarid grasslands. Communities dominated by A. ordosica were not stable, with an increase in surface soil water availability, the dominance was replaced by S. bungeana. Our findings on the linkage between plant water use sources and patterns and shrub encroachment shall help future arid and semiarid grassland management under changing climate conditions.
关键词	Shrub encroachment Stable delta O-18 isotope Proportional similarity index Root vertical distribution Water use sources Hydrological niche
学科领域	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
DOI	10.1016/j.agrformet.2021.108579
收录类别	SCI
语种	英语
WOS关键词	WOODY PLANT ENCROACHMENT ; ISOTOPE MIXING MODELS ; STABLE-ISOTOPES ; USE STRATEGIES ; ECOSYSTEM ; DROUGHT ; DESERT ; DEPTH ; DESERTIFICATION ; FACILITATION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000692679900040
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1873-2240
资助机构	National Natural Science Foundation of China [41330749]
作者邮箱	zhengyr@ibcas.ac.cn
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26595
专题	中科院北方资源植物重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, Key Lab Resource Plants, West China Subalpine Bot Garden, 20 Nanxincun, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA 4.Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA
推荐引用方式 GB/T 7714	Liu, Xin,Zhuang, Qianlai,Lai, Liming,et al. Soil water use sources and patterns in shrub encroachment in semiarid grasslands of Inner Mongolia[J]. AGRICULTURAL AND FOREST METEOROLOGY,2021,308.
APA	Liu, Xin.,Zhuang, Qianlai.,Lai, Liming.,Zhou, Jihua.,Sun, Qinglin.,...&Zheng, Yuanrun.(2021).Soil water use sources and patterns in shrub encroachment in semiarid grasslands of Inner Mongolia.AGRICULTURAL AND FOREST METEOROLOGY,308.
MLA	Liu, Xin,et al."Soil water use sources and patterns in shrub encroachment in semiarid grasslands of Inner Mongolia".AGRICULTURAL AND FOREST METEOROLOGY 308(2021).

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