干旱区生态环境知识资源中心(Arid): Modeling the physiological responses of a desert shrub to rainfall pulses in an arid environment in northwestern China

Arid

DOI	10.1016/j.jaridenv.2020.104277
	Modeling the physiological responses of a desert shrub to rainfall pulses in an arid environment in northwestern China
	Liu, Hu; Wu, Chuandong; Yu, Yang; Zhao, Wenzhi; Yang, Qiyue; Wang, Sijia; Liu, Jintao
通讯作者	Liu, H ; Zhao, WZ
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2020
卷号	183
英文摘要	A physically-based model for soil-plant-atmosphere continuum (SPAC) is parameterized and evaluated against field-measured physiological responses of a desert shrub, Haloxylon Ammodendron (HA), to rainfall pulses in a desert environment in northwestern China. Despite its simplicity, the model was successfully employed to assess the complexity and uncertainty involved in the physiological responses of HA following pulsed rainfall events. Through modelling efforts, we report a systematic evaluation of the non-linear relationship between the physiological responses of HA and pulse magnitude or antecedent moisture. The results show that following the rainfall pulses, the modeled daily transpiration and assimilation rates either stayed the same or decreased monotonically with water stress. However, the stomatal conductance (g(s)) and photosynthetic rate (A(n)) responses were relatively weaker when compared to the increase in water potential. We found that rainfall events with <5 mm cannot induce any substantial response of A(n) (Delta < 4 mu mol m(-2)s(-1)), and at least 13 mm of rain is required to increase A(n) by 10 mu mol m(-2)s(-1). Significant responses of water use efficiency (WUE) were not even discernible from viewing the simulation. Our analysis reproduced the judgements with a certain uncertainty that HA is basically a kind of drought resistant species, it tends to have a more conservative water-use strategy and thus a safer photosynthetic behavior. The inverse-texture hypothesis is much more clearly supported by the modeling experiments, suggesting that soil texture drives differences in the effects of pulses on the magnitude and sensitivity of the physiological responses of plants, and the interaction between rainfall and soil texture may lead to the preferred acquisition and use of pulsed precipitation by HA. The modelling work and findings in this study is likely to shed light on the quantitative understanding of the physiological behavior of other plants in water-limited environments.
英文关键词	Precipitation pulses Soil-plant-atmosphere continuum Physiological responses Desert environments Haloxylon ammodendron
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000572331700003
WOS关键词	LEAF GAS-EXCHANGE ; PLANT-ATMOSPHERE CONTINUUM ; WATER-USE EFFICIENCY ; HEIHE RIVER-BASIN ; HALOXYLON-AMMODENDRON ; PRECIPITATION PULSES ; STOMATAL CONDUCTANCE ; CARBON ASSIMILATION ; DROUGHT STRESS ; SOIL-WATER
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	兰州大学 ; 河海大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326472
作者单位	[Liu, Hu; Wu, Chuandong; Zhao, Wenzhi; Yang, Qiyue; Wang, Sijia] Chinese Ecosyst Res Network, Linze Inland River Basin Res Stn, Lanzhou 730000, Peoples R China; [Liu, Hu; Zhao, Wenzhi; Yang, Qiyue; Wang, Sijia] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol & River Basin Sci, Lanzhou 730000, Peoples R China; [Wu, Chuandong] Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China; [Yu, Yang] China Inst Water Resources & Hydropower Res, Dept Sediment Res, Beijing 100038, Peoples R China; [Wang, Sijia] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Liu, Jintao] Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hu,Wu, Chuandong,Yu, Yang,et al. Modeling the physiological responses of a desert shrub to rainfall pulses in an arid environment in northwestern China[J]. 兰州大学, 河海大学,2020,183.
APA	Liu, Hu.,Wu, Chuandong.,Yu, Yang.,Zhao, Wenzhi.,Yang, Qiyue.,...&Liu, Jintao.(2020).Modeling the physiological responses of a desert shrub to rainfall pulses in an arid environment in northwestern China.JOURNAL OF ARID ENVIRONMENTS,183.
MLA	Liu, Hu,et al."Modeling the physiological responses of a desert shrub to rainfall pulses in an arid environment in northwestern China".JOURNAL OF ARID ENVIRONMENTS 183(2020).