干旱区生态环境知识资源中心(Arid): Sap flow dynamics of xerophytic shrubs differ significantly among rainfall categories in the Loess Plateau of China

Arid

DOI	10.1016/j.jhydrol.2020.124815
	Sap flow dynamics of xerophytic shrubs differ significantly among rainfall categories in the Loess Plateau of China
	Wang, Di 1; Gao, Guangyao 1,2; Li, Junran 3; Yuan, Chuan 4; Lu, Yihe 1,2; Fu, Bojie 1,2
通讯作者	Gao, Guangyao
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	585
英文摘要	Global climate change is likely to change the timing, frequency and magnitude of precipitation events, studying the response of sap flow (SF) of plants to rainfall events is thus important for understanding the response of ecosystems to global climate change. Here, we conducted a comprehensive study on the SF, rainfall events, meteorological factors and soil water content (SWC) for two typical xerophytic shrub stands (Caragana korshinskii and Salix psammophila) on the Loess Plateau of China for two rainy seasons (June-September) in 2015 and 2016. The rainfall events were classified into three rainfall categories using the K-means clustering based on the rainfall amount (RA), rainfall duration (RD) and rainfall intensity (RI) (category I: lowest mean RA, RD and RI, category II: moderate mean RA, RI and highest mean RD and category III: highest mean RA, RI and moderate mean RD). The results showed that the response of SF at both C. korshinskii and S. psammophila stands to rainfall events differed within the three categories. The occurrence of rainfall events significantly decreased daily SF of C. korshinskii in three rainfall categories, whereas the daily SF of S. psammophila is more strongly influenced by rainfall category II. Maximum decreases in daily SF between the pre-rainfall and the rainfall weather condition of the two stands both occurred in rainfall category II. Daily rainfall SF at both stands was strongly correlated with daily SR, RH and VPD, regardless of the rainfall categories. Diurnal variation of hourly SF at both stands also differed among the days with similar RA and RD in the same rainfall category. It can be inferred that SF of C. korshinskii is more susceptible to rainfall events than S. psammophila. Rainfall characteristics (RA, RD and RI) and rainfall distribution should be fully considered when assessing the response of SF of shrubs to rainfall events.
英文关键词	Sap flow Rainfall category Inter-specific variation Xerophytic shrub Drylands
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000544230000070
WOS关键词	AREA TENGGER DESERT ; HORQIN SANDY LAND ; STOMATAL CONDUCTANCE ; SOIL-WATER ; HYDRAULIC CONDUCTANCE ; ENVIRONMENTAL-FACTORS ; CARAGANA-MICROPHYLLA ; PRECIPITATION PULSES ; SALIX-PSAMMOPHILA ; ARID REGION
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319658
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Univ Tulsa, Dept Geosci, Tulsa, OK 74104 USA; 4.Yunnan Univ, Inst Int Rivers & Ecosecur, Kunming 650091, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Wang, Di,Gao, Guangyao,Li, Junran,et al. Sap flow dynamics of xerophytic shrubs differ significantly among rainfall categories in the Loess Plateau of China[J],2020,585.
APA	Wang, Di,Gao, Guangyao,Li, Junran,Yuan, Chuan,Lu, Yihe,&Fu, Bojie.(2020).Sap flow dynamics of xerophytic shrubs differ significantly among rainfall categories in the Loess Plateau of China.JOURNAL OF HYDROLOGY,585.
MLA	Wang, Di,et al."Sap flow dynamics of xerophytic shrubs differ significantly among rainfall categories in the Loess Plateau of China".JOURNAL OF HYDROLOGY 585(2020).