干旱区生态环境知识资源中心(Arid): Spatiotemporal origin of soil water taken up by vegetation

Arid

DOI	10.1038/s41586-021-03958-6
	Spatiotemporal origin of soil water taken up by vegetation
	Miguez-Macho, Gonzalo; Fan, Ying
通讯作者	Miguez-Macho, G (corresponding author), Univ Santiago de Compostela, Fac Phys, Nonlinear Phys Grp, CRETUS, Galicia, Spain. ; Fan, Y (corresponding author), Rutgers State Univ, Dept Earth & Planetary Sci, New Brunswick, NJ 08854 USA.
来源期刊	NATURE
ISSN	0028-0836
EISSN	1476-4687
出版年	2021
英文摘要	Vegetation modulates Earth's water, energy and carbon cycles. How its functions might change in the future largely depends on how it copes with droughts(1-4). There is evidence that, in places and times of drought, vegetation shifts water uptake to deeper soil(5-7) and rock(8,9) moisture as well as groundwater(10-12). Here we differentiate and assess plant use of four types of water sources: precipitation in the current month (source 1), past precipitation stored in deeper unsaturated soils and/or rocks (source 2), past precipitation stored in groundwater (source 3, locally recharged) and groundwater from precipitation fallen on uplands via river-groundwater convergence toward lowlands (source 4, remotely recharged). We examine global and seasonal patterns and drivers in plant uptake of the four sources using inverse modelling and isotope-based estimates. We find that (1), globally and annually, 70% of plant transpiration relies on source 1, 18% relies on source 2, only 1% relies on source 3 and 10% relies on source 4; (2) regionally and seasonally, source 1 is only 19% in semi-arid, 32% in Mediterranean and 17% in winter-dry tropics in the driest months; and (3) at landscape scales, source 2, taken up by deep roots in the deep vadose zone, is critical in uplands in dry months, but source 4 is up to 47% in valleys where riparian forests and desert oases are found. Because the four sources originate from different places and times, move at different spatiotemporal scales and respond with different sensitivity to climate and anthropogenic forces, understanding the space and time origins of plant water sources can inform ecosystem management and Earth system models on the critical hydrological pathways linking precipitation to vegetation. Global inverse modelling of plant water acquisition depth and isotope-based plant water use estimates demonstrate globally prevalent use of precipitation from distant sources, and that water-stressed ecosystems are well suited to using past and remote precipitation.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000704947000005
WOS关键词	SEMIARID ECOSYSTEMS ; CO2 ; VARIABILITY ; SHALLOW ; SYSTEMS ; PLANTS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364221
作者单位	[Miguez-Macho, Gonzalo] Univ Santiago de Compostela, Fac Phys, Nonlinear Phys Grp, CRETUS, Galicia, Spain; [Fan, Ying] Rutgers State Univ, Dept Earth & Planetary Sci, New Brunswick, NJ 08854 USA
推荐引用方式 GB/T 7714	Miguez-Macho, Gonzalo,Fan, Ying. Spatiotemporal origin of soil water taken up by vegetation[J],2021.
APA	Miguez-Macho, Gonzalo,&Fan, Ying.(2021).Spatiotemporal origin of soil water taken up by vegetation.NATURE.
MLA	Miguez-Macho, Gonzalo,et al."Spatiotemporal origin of soil water taken up by vegetation".NATURE (2021).