Does damming streams alter the water use strategies of riparian trees? A case study in a subtropic climate

doi:10.1002/ldr.3500

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Does damming streams alter the water use strategies of riparian trees? A case study in a subtropic climate
	Zhao, Pei 2,3; Cornelis, Wim 1; Tang, Xiangyu 2; Zhao, Peng 4; Tang, Jialiang 2
刊名	LAND DEGRADATION & DEVELOPMENT
	2020-01-02
页码	DOI: 10.1002/ldr.3500
关键词	hydrological modification land degradation plant water use riparian ecosystem stable isotopes
ISSN号	1085-3278
DOI	10.1002/ldr.3500
产权排序	3
文献子类	Article; Early Access
英文摘要	Understand the mechanism governing degradation of riparian forests in response to damming streams is needed for a comprehensive impact assessment of dams in relation to protection of river ecosystems. However, the ascription of riparian forest degradation to the hydrological changes induced by dams lacks of direct proof and the hypothesis that dam construction alters the water use strategy of riparian trees is yet to be tested. In this study, the water sources of riparian trees grown upstream and downstream of dams at SW China, were investigated by dual isotopes and a Bayesian model. We observed that xylem water in downstream Populus adenopoda had significantly lower line-conditioned excess values than upstream trees. The water source of upstream trees was barely subjected to evaporation. Upstream mature and young P. adenopoda trees both acquired more streamwater (47.2 +/- 9.8% and 44.8 +/- 7.9%) than groundwater (28.2 +/- 4.4% and 29.2 +/- 3.5%) or soil water (24.5 +/- 5.6% and 26.0 +/- 4.9%). Downstream mature and young P. adenopoda trees both largely used soil water (49.0 +/- 11.6% and 53.0 +/- 6.2%) as main water source. In contrast, Pterocarya stenoptera highly depended on streamwater, regardless of size and location, implying that damming had little effect on this species. Damming streams may increase water competition among downstream riparian trees, which could explain declines in growth rate, canopy dieback, tree death, and eventually downstream land degradation. We believe that this study is of significant value for research into riparian forest degradation resulting from hydrological changes, and in particular to apprehend the impact of small dams, which has barely been studied.
电子版国际标准刊号	1099-145X
WOS关键词	HYDROLOGIC REGIME ; DAM CONSTRUCTION ; FLOW REGULATION ; TURKWEL RIVER ; TANA RIVER ; SOIL-WATER ; SAN-PEDRO ; FLOODPLAIN ; VEGETATION ; RESERVOIR
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	WILEY
WOS记录号	WOS:000505150100001
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/33760]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Tang, Xiangyu
作者单位	1.Univ Ghent, Dept Environm, B-9000 Ghent, Belgium; 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China; 3.Shangluo Univ, Dept Geog, Shangluo 726000, Shaanxi, Peoples R China; 4.Sichuan Agr Univ, Coll Forestry, Chengdu 611130, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Pei,Cornelis, Wim,Tang, Xiangyu,et al. Does damming streams alter the water use strategies of riparian trees? A case study in a subtropic climate[J]. LAND DEGRADATION & DEVELOPMENT,2020:DOI: 10.1002/ldr.3500.
APA	Zhao, Pei,Cornelis, Wim,Tang, Xiangyu,Zhao, Peng,&Tang, Jialiang.(2020).Does damming streams alter the water use strategies of riparian trees? A case study in a subtropic climate.LAND DEGRADATION & DEVELOPMENT,DOI: 10.1002/ldr.3500.
MLA	Zhao, Pei,et al."Does damming streams alter the water use strategies of riparian trees? A case study in a subtropic climate".LAND DEGRADATION & DEVELOPMENT (2020):DOI: 10.1002/ldr.3500.