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Does damming streams alter the water use strategies of riparian trees? A case study in a subtropic climate
Zhao, Pei1,3; Cornelis, Wim2; Tang, Xiangyu3; Zhao, Peng4; Tang, Jialiang3
2020-01-02
Source PublicationLAND DEGRADATION & DEVELOPMENT
ISSN1085-3278
EISSN1099-145X
PagesDOI: 10.1002/ldr.3500
SubtypeArticle; Early Access
Contribution Rank3
AbstractUnderstand 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.
Keywordhydrological modification land degradation plant water use riparian ecosystem stable isotopes
DOI10.1002/ldr.3500
Indexed BySCI
WOS KeywordHYDROLOGIC REGIME ; DAM CONSTRUCTION ; FLOW REGULATION ; TURKWEL RIVER ; TANA RIVER ; SOIL-WATER ; SAN-PEDRO ; FLOODPLAIN ; VEGETATION ; RESERVOIR
Language英语
WOS Research AreaEnvironmental Sciences & Ecology ; Agriculture
WOS SubjectEnvironmental Sciences ; Soil Science
WOS IDWOS:000505150100001
PublisherWILEY
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/33760
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorTang, Xiangyu
Affiliation1.Shangluo Univ, Dept Geog, Shangluo 726000, Shaanxi, Peoples R China;
2.Univ Ghent, Dept Environm, B-9000 Ghent, Belgium;
3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China;
4.Sichuan Agr Univ, Coll Forestry, Chengdu 611130, Sichuan, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
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.
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