气候变化领域集成服务门户(CCPortal): Flooding constrains tree water use of a riparian forest in the lower Heihe River Basin, Northwest China

CCPortal

DOI	10.1016/j.scitotenv.2020.144069
	Flooding constrains tree water use of a riparian forest in the lower Heihe River Basin, Northwest China
	Yu, Tengfei; Feng, Qi; Si, Jianhua; Xi, Haiyang; Su, Yonghong; Mitchell, Patrick J.; Pinkard, Elizabeth A.
发表日期	2021
ISSN	0048-9697
EISSN	1879-1026
卷号	760
英文摘要	Riparian forests in floodplains are occasionally or regularly submerged by flooding. However, controversy exists regarding the effects of flooding on water use in riparian forests, and this controversy severely restricts our ability to better utilize limited water resources to restore damaged riparian forests in arid regions. The evapotranspiration (Et) and transpiration (T) of riparian P. euphratica forests in the arid regions of northwestern China were determined using eddy covariance and sap flow technology across a 3-year period. Fortunately, the flooding introduced by ecological water diversion was occurred in 2014 and 2016 but not in 2015. Our results showed that the magnitude and seasonal pattern of Et across 3 years was comparable (approximately 900 mm), but the T was higher in 2015 (431 mm) than in the other two years (288 mm in 2014 and 290 mm in 2016). The interannual patterns in the transpiration were consistent with the net ecosystem productivity at the site. Given the similar meteorological conditions (e.g. net radiation, temperature, relative humidity, and vapor pressure deficit) among the 3 years, two aspects may contributed to the suppressed tree water use and productivity under flooding: 1) the increased soil salinity reduce the roots water uptake from soil by increasing root water potential via osmotic adjustment; and 2) the depressed tree growth (e.g. the leaf area) via suspended water upward transport along soil-plant-atmosphere continuum. Although flooding is widely known beneficial for the regeneration, we suggest that it is not appropriate for the rejuvenation of phreatophyte (e.g., Populus spp.) in arid regions. Our results were drawn from only three years of measurement and therefore longer time series are needed to confirm or refine those conclusions. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Evapotranspiration; Transpiration; Flooding; Riparian forests; Phreatophytes; Populus euphratica
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS关键词	ENERGY-BALANCE CLOSURE ; POPULUS-EUPHRATICA ; TARIM RIVER ; SAP-FLOW ; TAMARIX-RAMOSISSIMA ; ARID REGION ; DESERT ; EVAPOTRANSPIRATION ; RESPONSES ; VEGETATION
WOS记录号	WOS:000607779400131
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239441
作者单位	[Yu, Tengfei; Feng, Qi; Si, Jianhua; Xi, Haiyang; Su, Yonghong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Alax Desert Ecohydrol Expt Res Stn, Lanzhou 730000, Peoples R China; [Yu, Tengfei; Feng, Qi; Si, Jianhua; Xi, Haiyang; Su, Yonghong] Chinese Acad Sci, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Peoples R China; [Mitchell, Patrick J.; Pinkard, Elizabeth A.] CSIRO Land & Water, 15 Coll Rd,Sandy Bay, Hobart, Tas 7005, Australia
推荐引用方式 GB/T 7714	Yu, Tengfei,Feng, Qi,Si, Jianhua,et al. Flooding constrains tree water use of a riparian forest in the lower Heihe River Basin, Northwest China[J]. 中国科学院西北生态环境资源研究院,2021,760.
APA	Yu, Tengfei.,Feng, Qi.,Si, Jianhua.,Xi, Haiyang.,Su, Yonghong.,...&Pinkard, Elizabeth A..(2021).Flooding constrains tree water use of a riparian forest in the lower Heihe River Basin, Northwest China.SCIENCE OF THE TOTAL ENVIRONMENT,760.
MLA	Yu, Tengfei,et al."Flooding constrains tree water use of a riparian forest in the lower Heihe River Basin, Northwest China".SCIENCE OF THE TOTAL ENVIRONMENT 760(2021).