干旱区生态环境知识资源中心(Arid): Responses of two desert shrubs to simulated rainfall pulses in an arid environment, northwestern China

Arid

DOI	10.1007/s11104-018-3892-2
	Responses of two desert shrubs to simulated rainfall pulses in an arid environment, northwestern China
	Zhang, Cicheng 1,2; Li, Xiao-Yan 1,2; Wang, Yang 2; Wu, Huawu 3,4; Wang, Pei 1,2; Li, Wei 2; Bai, Yan 2; Li, Engui 2; Wang, Shuai 1; Miao, Chiyuan 1; Wu, Xiuchen 1,2
通讯作者	Wu, Xiuchen
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2019
卷号	435 期号:1-2 页码:239-255
英文摘要	Background and aimsDesert environments are characterized by limited and highly variable rainfall, which is an intermittent source of water critical to the evolution of the structure and functioning of desert ecosystems. The present study was the first to assess the effects of different amounts of rainfall received through discrete rainfall events and of their seasonality on two little-studied desert shrubs, namely Reaumurica soongorica and Nitria sphaerocarpa, in an arid inland river basin in north-western China.Materials and methodsPulse rainfall events were simulated at the following magnitudes (amount of water in millimeters per rainfall event): 0, 5, 10, 15, 25, and 40mm on two days in 2016, 24th June (early growing season) and 4th August (middle growing season), respectively. The rainfall effects were measured in terms of the following parameters: plant uptake of rainwater by plants as assessed by O-18 in the water within plant tissue, pre-dawn plant water potential, and the rates of photosynthesis and stomatal conductance.ResultsN. sphaerocarpa shows faster response to simulated pulse rainfall events than R. soongorica, and the response of both species was quicker in the middle- than in early- growing season. Water uptake increased non-linearly with the amounts of rainfall, reaching a plateau at about 25mm in R. soongorica and 20mm in N. sphaerocarpa. The accumulative carbon gain relative to the controlled experiment increased with the amounts of rainfall, the increase being greater in the middle growing season.ConclusionOur results clearly show that both the seasonality and the amounts of rainfall in discrete rainfall events took great impacts on response of plant ecophysiological activities and such responses are species dependent. The challenge ahead is to understand the consequences of long-term variability in rainfall for the physiology of desert plants and species dynamics in desert ecosystems.
英文关键词	Rainfall pulse O-18 Pre-dawn water potential Plant water uptake Reaumurica soongorica Nitria sphaerocarpa
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000458878100017
WOS关键词	WATER-USE STRATEGIES ; SUMMER PRECIPITATION ; STOMATAL CONDUCTANCE ; GAS-EXCHANGE ; SOIL-WATER ; PLANT ; ECOSYSTEM ; PHOTOSYNTHESIS ; GRASSLAND ; SENSITIVITY
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217991
作者单位	1.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; 2.Beijing Normal Univ, Fac Geog Sci, Sch Nat Resources, Beijing 100875, Peoples R China; 3.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Watershed Geog Sci, Nanjing 210008, Peoples R China; 4.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Nanjing, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Cicheng,Li, Xiao-Yan,Wang, Yang,et al. Responses of two desert shrubs to simulated rainfall pulses in an arid environment, northwestern China[J]. 北京师范大学,2019,435(1-2):239-255.
APA	Zhang, Cicheng.,Li, Xiao-Yan.,Wang, Yang.,Wu, Huawu.,Wang, Pei.,...&Wu, Xiuchen.(2019).Responses of two desert shrubs to simulated rainfall pulses in an arid environment, northwestern China.PLANT AND SOIL,435(1-2),239-255.
MLA	Zhang, Cicheng,et al."Responses of two desert shrubs to simulated rainfall pulses in an arid environment, northwestern China".PLANT AND SOIL 435.1-2(2019):239-255.