干旱区生态环境知识资源中心(Arid): Tree-ring delta O-18 identifies similarity in timing but differences in depth of soil water uptake by trees in mesic and arid climates

Arid

DOI	10.1016/j.agrformet.2021.108569
	Tree-ring delta O-18 identifies similarity in timing but differences in depth of soil water uptake by trees in mesic and arid climates
	Wang, Lu; Liu, Hongyan; Leavitt, Steven; Cressey, Elizabeth L.; Quine, Timothy A.; Shi, Jiangfeng; Shi, Shiyuan
通讯作者	Liu, HY (corresponding author), Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China.
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2021
卷号	308
英文摘要	Water availability and uptake by trees will be important to predict tree growth, especially in regions with increasingly drying climate. Tree-ring delta O-18 (delta O-18(TR)) can be influenced by moisture, so it may be a useful tool for tracking soil moisture content (SMC) variation with respect to the depth from which water is taken up and the timing of water uptake. Here we analyzed the relationship between delta O-18(TR) of conifers and monthly SMC at different depths (0-10 and 0-100 cm) at three dry and three humid sites in China. We found that SMC outperformed local precipitation amount in terms of strength of correlations with delta O-18(TR) in most months during the growing season. At the dry sites, delta O-18(TR) was significantly correlated with topsoil SMC (0-10 cm) but more weakly related to SMC at 0-100 cm during the main growing season (June-July-August), implying that the trees were primarily utilizing shallow water. Whereas humid sites had similar correlations at both depths, suggesting that these trees utilized water over depth. At both sites, the highest correlation between delta O-18(TR) and SMC occurred in months with the strongest monsoonal precipitation (June for the humid sites and July/August for the dry sites), which may indicate rapid cycling of precipitation into surface soils and then into tree roots. These findings are supported by the root distribution at the dry and humid sites, but are contrary to Walter's tree-grass two-layer model that stressed the uptake of deep soil water by trees in dry regions. In summary, our study suggests similar soil water-use seasonality but different water uptake depths of trees under dry and humid climates. This implies that delta O-18(TR) could be a reliable proxy for SMC variation, which may provide important evidence for understanding tree water-use adaptation to changing climate.
英文关键词	Soil moisture Tree-ring delta O-18 Water use strategy Root distribution Climate aridity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000692679900031
WOS关键词	PRECIPITATION RECONSTRUCTION ; RELATIVE-HUMIDITY ; SUMMER MONSOON ; STABLE-ISOTOPES ; OXYGEN ISOTOPES ; MOISTURE ; PLATEAU ; CHINA ; MOUNTAINS ; MORTALITY
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构	北京大学 ; 南京大学 ; University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368288
作者单位	[Wang, Lu; Liu, Hongyan] Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China; [Leavitt, Steven] Univ Arizona, Lab Tree Ring Res, Tucson, AZ 85721 USA; [Cressey, Elizabeth L.; Quine, Timothy A.] Univ Exeter, Dept Geog, Amory Bldg,Rennes Dr, Exeter EX4 4RJ, Devon, England; [Shi, Jiangfeng; Shi, Shiyuan] Nanjing Univ, Sch Geog & Ocean Sci, Nanjing 210023, Peoples R China
推荐引用方式 GB/T 7714	Wang, Lu,Liu, Hongyan,Leavitt, Steven,et al. Tree-ring delta O-18 identifies similarity in timing but differences in depth of soil water uptake by trees in mesic and arid climates[J]. 北京大学, 南京大学, University of Arizona,2021,308.
APA	Wang, Lu.,Liu, Hongyan.,Leavitt, Steven.,Cressey, Elizabeth L..,Quine, Timothy A..,...&Shi, Shiyuan.(2021).Tree-ring delta O-18 identifies similarity in timing but differences in depth of soil water uptake by trees in mesic and arid climates.AGRICULTURAL AND FOREST METEOROLOGY,308.
MLA	Wang, Lu,et al."Tree-ring delta O-18 identifies similarity in timing but differences in depth of soil water uptake by trees in mesic and arid climates".AGRICULTURAL AND FOREST METEOROLOGY 308(2021).