Seasonal and spatial variations of water use among riparian vegetation in tropical monsoon region of SW China

Wang, Pingyuan; Liu, Wenjie; Zhang, Jiao‐Lin; Yang, Bin; Singh, Ashutosh Kumar; Jian, Wu; Jiang, Xiaojin

doi:10.1002/eco.2085

Cited by 17 publications

(9 citation statements)

References 65 publications

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“…In the floodplain habitat, the SWC of three soil layers were higher, and the water absorption layer of T. ramosissima was relatively shallow (Figure 7). This result is consistent with the results of a previous study in tropical monsoon region in which shallow soil was the main water source during the rainy season [51]. Li et al [22] also observed that the soil water content was relatively high and the dominant depth of plant water uptake was relatively shallow in the riparian zone of arid regions.…”

Section: Discussionsupporting

confidence: 92%

Contrasting Water Use Strategies of Tamarix ramosissima in Different Habitats in the Northwest of Loess Plateau, China

Zhang

et al. 2020

Water

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As a species for ecological restoration in northern China, Tamarix ramosissima plays an important role in river protection, flood control, regional climate regulation, and landscape construction with vegetation. Two sampling sites were selected in the hillside and floodplain habitats along the Lanzhou City, and the xylems of T. ramosissima and potential water sources were collected, respectively. The Bayesian mixture model (MixSIAR) and soil water excess (SW-excess) were applied to analyze the relationship on different water pools and the utilization ratios of T. ramosissima to potential water sources in two habitats. The results showed that the slope and intercept of local meteoric water line (LMWL) in two habitats were smaller compared with the global meteoric water line (GMWL), which indicated the existence of drier climate and strong evaporation in the study area, especially in the hillside habitat. Except for the three months in hillside, the SW-excess of T. ramosissima were negative, which indicated that xylems of T. ramosissima are more depleted in δ2H than the soil water line. In growing seasons, the main water source in hillside habitat was deep soil water (80~150 cm) and the utilization ratio was 63 ± 17% for T. ramosissima, while the main water source in floodplain habitat was shallow soil water (0~30 cm), with a utilization ratio of 42.6 ± 19.2%, and the water sources were different in diverse months. T. ramosissima has a certain adaptation mechanism and water-use strategies in two habitats, and also an altered water uptake pattern in acquiring the more stable water. This study will provide a theoretical basis for plant water management in ecological environment protection in the Loess Plateau.

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Section: Discussionsupporting

confidence: 92%

Contrasting Water Use Strategies of Tamarix ramosissima in Different Habitats in the Northwest of Loess Plateau, China

Zhang

et al. 2020

Water

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“…CC BY 4.0 License. This finding has also been proven in riparian phreatophytic trees (Populus fremontii and Salix gooddingii) and riparian deep-rooted tree species (Busch et al, 1992;Bowling et al, 2017;Wang et al, 2019a). Even under shallow groundwater with high salinity, no river water was directly absorbed by riparian Eucalyptus coolabah alongside an ephemeral arid zone river in Australia (Costelloe et al, 2008).…”

Section: Introductionsupporting

confidence: 56%

Quantifying river water contributions to riparian trees along a losing river: Lessons from stable isotopes and iteration method

Ying²,

Song³

et al. 2022

Preprint

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Abstract. River water plays a critical role in riparian plant water use and riparian ecosystem restoration along losing rivers (rivers losing flow into underlying groundwater) under climate warming. How to quantify the contributions of river water to riparian plants under different water tables and the related responses of plant water use efficiency is a great challenge. In this study, experiments of stable isotopes (δ2H, δ18O and 222Rn) in different waters and leaf δ13C were conducted for riparian deep-rooted Salix babylonica (L.) during dry year (2019) and wet year (2021) along the Chaobai River in Beijing, China. The MixSIAR model in combination with an iteration method were proposed to quantify the proportional river water contribution (RWC) to riparian S. babylonica and its correlations with the depth of water table (WTD) as well as leaf δ13C. Results showed that riparian S. babylonica took up deep water (in 80−170 cm soil layer and groundwater) by 56.5 ± 10.8 %. River water that recharged riparian deep water was an indirect water source and contributed 20.3 % of water to riparian trees nearby the losing river. Significantly increasing river water acquisitions (by 7.0 %) but decreasing leaf δ13C (by −2.0 ‰) of riparian trees were observed as the WTD changed from 2.7 m in 2019 to 1.7 m in 2021 (p < 0.05). A short residence time (no more than 0.28 days) of groundwater indicated that there was rapid and frequent river recharge to riparian groundwater in 2021. It was found that the RWC to riparian S. babylonica was negatively correlated with the WTD but positively related to the leaf δ13C in linear functions (p = 0.000). The rising water table would stimulate riparian trees to maximize transpiration water consumptions and show a profligate water use strategy with increasing water extraction from the losing river. This study provides critical insights into understanding the mechanism of water cycle in Groundwater-Soil-Plant-Atmosphere Continuum, managing water resources and riparian afforestation along losing rivers.

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“…These changes could profoundly affect the regional territorial and aquatic ecosystems and the water security of the BRB. First, the Buyuan River is an important source of water for certain tree species characterized by deep and extensive root systems occupying the BRB (Wang et al, 2019). The river also supports large areas of tea gardens and rubber plantations.…”

Section: Resultsmentioning

confidence: 99%

Runoff responses to climate change in China's Buyuan River Basin

Lü

Jiang

et al. 2021

River Research & Apps

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Climate change has affected the dynamics of the water cycle and its consequent effects on water resources in many regions. The Buyuan River, the largest tributary of the Upper Mekong River, is one of the regions with the strongest climate change in the Mekong River Basin, and its cross‐border impact on water resources has received increasing attention. However, few studies have focused on the runoff responses to future climate change in the Buyuan River Basin (BRB). In this study, the MIKE SHE model was applied to estimate the runoff of the BRB, based on climate‐change scenarios from the Beijing Climate Center Climate System Model (BCC‐CSM1‐1) under two Representative Concentration Pathways (RCPs). The simulations predicted a slight decrease in the mean annual runoff of the BRB under the RCP4.5 and RCP8.5 scenarios (2020–2049) compared with the reference period (1959–2012), with an increase in the magnitude of inter‐annual variation, leading to increased deficit and surplus during dry and wet years. The simulations predicted the earlier maximum monthly runoff and a more evenly distributed annual distribution of the runoff under RCP4.5 and RCP8.5 scenarios as compared to the reference period. The arrival of the flood season in the BRB was advanced by a month under future climate‐change scenarios. The results showed that the average annual runoff of the BRB does not change significantly under future climate‐change scenarios. However, there are obvious changes in the inter‐annual and intra‐annual distribution of the runoff.

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Seasonal and spatial variations of water use among riparian vegetation in tropical monsoon region of SW China

Cited by 17 publications

References 65 publications

Contrasting Water Use Strategies of Tamarix ramosissima in Different Habitats in the Northwest of Loess Plateau, China

Contrasting Water Use Strategies of Tamarix ramosissima in Different Habitats in the Northwest of Loess Plateau, China

Quantifying river water contributions to riparian trees along a losing river: Lessons from stable isotopes and iteration method

Runoff responses to climate change in China's Buyuan River Basin

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