干旱区生态环境知识资源中心(Arid): A multiple-temporal scale analysis of biophysical control of sap flow in Salix psammophila growing in a semiarid shrubland ecosystem of northwest China

Arid

DOI	10.1016/j.agrformet.2020.107985
	A multiple-temporal scale analysis of biophysical control of sap flow in Salix psammophila growing in a semiarid shrubland ecosystem of northwest China
	Hayat, Muhammad; Zha, Tianshan; Jia, Xin; Iqbal, Sundas; Qian, Duo; Bourque, Charles P-A; Khan, Alamgir; Tian, Yun; Bai, Yujie; Liu, Peng; Yang, Ruizhi
通讯作者	Zha, TS
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2020
卷号	288
英文摘要	With increased usage of plantations in the control of desertification and water shortages in the Mu Us Desert, water use by desert-dwelling shrubs, such as Salix psammophila has become a serious topic in the management of ecologically-important plants. However, our understanding of the unevenness in water consumption across multiple timescales is still limited for many desert shrub species. Interannual variation in water consumption and its environmental controls are scarcely documented. To attend to this deficit, sap-flow measurements were continuously collected in a region of the Mu Us Desert from 2012 to 2017 to investigate the biophysical controls on sap-flow and water-consumption dynamics in S. psammophila. Diurnally, sap flow per leaf area (J(s)) was shown to be controlled by shortwave radiation (R-s), peaking in summer about two hours ahead of R-s, and about three to five hours ahead of air temperature (T-a) and vapor pressure deficit (VPD), respectively. Seasonal patterns in J(s) varied with precipitation and subsequent changes in soil volumetric water content (VWC). Soil volumetric water content was observed to modify the influence of the other environmental variables on Js (i.e., T-a, R-s, and VPD), with J(s) being more responsive to the site variables, when VWC > 0.09 m(3) m(-3), and less responsive, when <0.09 m(3) m(-3). Furthermore, T-a and VPD were responsible for most of the variation observed in J(s) during the leaf-expansion stage. Meanwhile, VWC and leaf area index (LAI) became more important during the leaf-expanded stage, and R-s during the leaf-defoliation stage. Interannually, LAI and meteoric water input to soils was responsible for most of the variation observed in J(s). Reduction in Js sensitivity to biophysical factors under water-stressed conditions across temporal scales and the hysteresis effect point to species acclimatization to dry soil conditions. This study has the potential to help: (i) clarify the temporal dynamics in J(s) for S. psammophila across multiple timescales; and (ii) contribute to the sustainable management and control of desertification in the region under future climate change and projected increases in severe drought.
英文关键词	Biophysical factors Drought Hysteresis effect Multiple temporal scales Salix psammophila Sap flow
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000538107200005
WOS关键词	VAPOR-PRESSURE DEFICIT ; WATER-USE ; SOIL-MOISTURE ; ENVIRONMENTAL CONTROLS ; INTERANNUAL VARIATION ; CANOPY CONDUCTANCE ; DESERT REGION ; TRANSPIRATION RESPONSES ; STOMATAL CONDUCTANCE ; CARAGANA-KORSHINSKII
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324649
作者单位	[Hayat, Muhammad; Zha, Tianshan; Jia, Xin; Iqbal, Sundas; Bourque, Charles P-A; Khan, Alamgir; Tian, Yun; Bai, Yujie; Liu, Peng; Yang, Ruizhi] Beijing Forestry Univ, Sch Soil & Water Conservat, Yanchi Res Stn, Beijing 100083, Peoples R China; [Hayat, Muhammad; Zha, Tianshan; Jia, Xin; Iqbal, Sundas; Khan, Alamgir; Tian, Yun; Bai, Yujie; Liu, Peng; Yang, Ruizhi] Beijing Forestry Univ, Beijing Engn Res Ctr Soil & Water Conservat, Beijing, Peoples R China; [Qian, Duo] Beijing Vocat Coll Agr, Beijing 102442, Peoples R China; [Bourque, Charles P-A] Univ New Brunswick, Fac Forestry & Environm Management, 28 Dineen Dr, Fredericton, NB E3B 5A3, Canada
推荐引用方式 GB/T 7714	Hayat, Muhammad,Zha, Tianshan,Jia, Xin,et al. A multiple-temporal scale analysis of biophysical control of sap flow in Salix psammophila growing in a semiarid shrubland ecosystem of northwest China[J]. 北京林业大学,2020,288.
APA	Hayat, Muhammad.,Zha, Tianshan.,Jia, Xin.,Iqbal, Sundas.,Qian, Duo.,...&Yang, Ruizhi.(2020).A multiple-temporal scale analysis of biophysical control of sap flow in Salix psammophila growing in a semiarid shrubland ecosystem of northwest China.AGRICULTURAL AND FOREST METEOROLOGY,288.
MLA	Hayat, Muhammad,et al."A multiple-temporal scale analysis of biophysical control of sap flow in Salix psammophila growing in a semiarid shrubland ecosystem of northwest China".AGRICULTURAL AND FOREST METEOROLOGY 288(2020).