干旱区生态环境知识资源中心(Arid): Depth distribution of soil water sourced by plants at the global scale: A new direct inference approach

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DOI	10.1002/eco.2177
	Depth distribution of soil water sourced by plants at the global scale: A new direct inference approach
	Amin, Anam 1; Zuecco, Giulia 1; Geris, Josie 2; Schwendenmann, Luitgard 3; McDonnell, Jeffrey J.4,5; Borga, Marco 1; Penna, Daniele 6
通讯作者	Amin, Anam
来源期刊	ECOHYDROLOGY
ISSN	1936-0584
EISSN	1936-0592
出版年	2020
卷号	13 期号:2
英文摘要	The depth distribution of soil water contributions to plant water uptake is poorly known. Here we evaluate the main water sources used by plants at the global scale and the effect of climate and plant groups on water uptake variability and depth distribution. The global meta-analysis is based on isotope data (delta H-2 and delta O-18) extracted from 65 peer-reviewed papers published between 1990 and 2017. We applied a new direct inference method to quantify the overlap between xylem water and soil water sources used by plants. The median overlap between xylem water and soil water at different depths varied between 28% and 100%, but they were generally >50%. The shallow (0-10 cm) soil water overlap with xylem water was largest in cold regions (100% +/- 0%) and lowest at tropical sites (about 28%). Conversely, the median overlap between xylem water and deep soil water was largest in the arid and the tropical zones (>75%) and much smaller in the temperate and cold zones. Our results suggest that the isotopic composition of xylem water reflects mostly the signature of shallow soil water (<30 cm) in the cold and the temperate zones, whereas in the arid and the tropical zones, plants appear to exploit water in deeper soil layers. Our novel, simple statistically-based direct inference method performed well in determining these differences in water sources, and can be applied more widely to isotope-based plant water uptake studies.
英文关键词	climate deuterium excess direct inference global scale meta-analysis soil water stable isotopes xylem water
类型	Article
语种	英语
国家	Italy ; Scotland ; New Zealand ; Canada
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000505642200001
WOS关键词	STABLE-ISOTOPES ; SUMMER PRECIPITATION ; SEASONAL PATTERNS ; UNSATURATED ZONE ; TREES ; TRANSPIRATION ; OXYGEN ; GROUNDWATER ; HYDROGEN ; FORESTS
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
EI主题词	2020-01-06
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312395
作者单位	1.Univ Padua, Dept Land Environm Agr & Forestry, Padua, Italy; 2.Univ Aberdeen, Sch Geosci, Aberdeen, Scotland; 3.Univ Auckland, Sch Environm, Auckland, New Zealand; 4.Univ Saskatchewan, Global Inst Water Secur, Saskatoon, SK, Canada; 5.Univ Saskatchewan, Sch Environm & Sustainabil, Saskatoon, SK, Canada; 6.Univ Florence, Dept Agr Food Environm & Forestry, Florence, Italy
推荐引用方式 GB/T 7714	Amin, Anam,Zuecco, Giulia,Geris, Josie,et al. Depth distribution of soil water sourced by plants at the global scale: A new direct inference approach[J],2020,13(2).
APA	Amin, Anam.,Zuecco, Giulia.,Geris, Josie.,Schwendenmann, Luitgard.,McDonnell, Jeffrey J..,...&Penna, Daniele.(2020).Depth distribution of soil water sourced by plants at the global scale: A new direct inference approach.ECOHYDROLOGY,13(2).
MLA	Amin, Anam,et al."Depth distribution of soil water sourced by plants at the global scale: A new direct inference approach".ECOHYDROLOGY 13.2(2020).