Water Use Strategies of Dominant Species (Caragana korshinskii and Reaumuria soongorica) in Natural Shrubs Based on Stable Isotopes in the Loess Hill, China

Yu, Zhongbo; Zhang, Mingjun; Qu, Deye; Duan, Wenguang; Wang, Jiaxin; Su, Pengyan; Guo, Rong

doi:10.3390/w12071923

Cited by 15 publications

(16 citation statements)

References 43 publications

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“…Lanzhou is a typical river valley city; the Yellow River runs through the city from west to east, and the southwest region has a higher altitude than the northeast. The altitude of most of the urban areas are between 1500 and 2500 m a.s.l., with beaded valley landforms alternating between canyons and basins [31]. Lanzhou is located in the temperate semi-arid continental monsoon climate zone, with an annual average temperature of 10.3 • C and an annual average precipitation of 324.9 mm, delivered mainly from July to September [31,32].…”

Section: Study Areamentioning

confidence: 99%

“…The altitude of most of the urban areas are between 1500 and 2500 m a.s.l., with beaded valley landforms alternating between canyons and basins [31]. Lanzhou is located in the temperate semi-arid continental monsoon climate zone, with an annual average temperature of 10.3 • C and an annual average precipitation of 324.9 mm, delivered mainly from July to September [31,32]. The Lanzhou section of the Yellow River is 152 km long, 45 km of which flows through urban areas.…”

Section: Study Areamentioning

confidence: 99%

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Recharge and Infiltration Mechanisms of Soil Water in the Floodplain Revealed by Water-Stable Isotopes in the Upper Yellow River

et al. 2021

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The stable isotopes (δD and δ18O) in soil water allow tracing of the flow and transportation of water in the soil. However, there are few studies on the use of soil water stable isotopes to explore the soil water in the floodplain, especially in determining the soil water source and infiltration mechanism. The Bayesian mixing model (MixSIAR) was integrated with the line conditioned excess (lc-excess) of stable isotopes (δD and δ18O) in precipitation, soil water (0–150 cm), river water, and groundwater to determinate the source and recharge mechanisms of two different soil profile types in the floodplain of the upper Yellow River in Lanzhou, China. The results showed that soil water below 80 cm was affected by river water recharge, affecting soil water content and stable isotopic composition at S1 sampling points (profile parallel to river water); this effect was not observed at S2 (profile is higher than the river water) sampling points. The isotopic compositions of the soil water sources at the two sampling points (S1: δD = −77.41‰, δ18O = −11.01‰; S2: δD = −74.02‰, δ18O = −10.56‰) were depleted more than those in the long-term amount-weighted precipitation isotopes (δD = −56.30‰, δ18O = −8.17‰). The isotope signatures of soil water sources are similar to the isotope characteristics of some high-intensity precipitation events (≥30 mm/day), indicating that soil water originates from a fraction of the total precipitation. The piston flow (60%) and the preferential flow (40%) coexist, but soil moisture and rainfall intensity will affect the sequence of the two infiltration methods. This study provides insights for understanding the hydrological process of the upper Yellow River and evaluating groundwater quality and protecting the floodplain environment.

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Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Recharge and Infiltration Mechanisms of Soil Water in the Floodplain Revealed by Water-Stable Isotopes in the Upper Yellow River

et al. 2021

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“…Due to the dry climate, strong evaporation and deeply buried groundwater (>120 m) in hillside habitat, thus it is difficult for vegetation to absorb and use the groundwater. Considering this, soil water at different depths is considered as a potential water source for hillside habitat [34]. The interaction between river water and groundwater in the floodplain habitat is relatively strong, leading to a similar isotopic value between river and groundwater, so they are regarded as the same water source in the floodplain habitat [29].…”

Section: Division Of Plant Water Sourcesmentioning

confidence: 99%

“…It was found that shallow soil water was the main source of water for T. ramosissima, and in low soil moisture months, T. ramosissima increased the use of deep soil water and river water [33]. Other studies on the water sources of plants in Lanzhou City have mainly focused on the foothills and hillside habitats [31,34]. Nevertheless, there were fewer comparative studies on different habitats.…”

Section: Introductionmentioning

confidence: 99%

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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“…[40]. Research on plant water uptake by using stable isotope technology and related mathematical models mainly focused on arid and semi-arid areas [14,[47][48][49][50]. However, only a few studies have been conducted on plant water use in subtropical humid areas.…”

Section: Introductionmentioning

confidence: 99%

Soil Water Use Strategies of Dominant Tree Species Based on Stable Isotopes in Subtropical Regions, Central China

Zhu

Wang

et al. 2022

Water

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Water is a crucial factor affecting plant growth and ecosystem processes. In the subtropical region, global climate change leads to frequent seasonal droughts. How plant water strategies and the adaptability of forest ecosystems change is an urgent issue to be discussed. In this study, four sample plots (P. massoniana for Plot 1, C. lanceolata for Plot 2, Q. acutissima for Plot 3, C. funebris and I. corallina for Plot 4) were selected in the Taizishan Mountain area of Hubei, China, including three forest types (coniferous forest, broad-leaved forest and coniferous broad-leaved mixed forest) and five dominant tree species. The δD and δ18O isotope compositions in plant and soil water were analysed, and the water use strategies of dominant species were predicted by using the MixSIAR model. The water absorption depth and proportion of the five species were significantly different in different seasons. In plot 4, I. corallina and C. funebris derived (58.8 ± 14.0% and 55.7 ± 23.4%, respectively) water from 10–40 cm soil in wet season, but C. funebris shifted to derive water from deep soil in dry season. This result indicates that the mixing of C. funebris and I. corallina can effectively prevent water competition in dry season with water deficit. From wet season to dry season, the depth of water utilisation of the P. massoniana, C. lanceolata, Q. acutissima and C. funebris with deep roots converted from shallow to deep soil, suggesting that the four species had significant dimorphic root systems and strong ecological plasticity.

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Water Use Strategies of Dominant Species (Caragana korshinskii and Reaumuria soongorica) in Natural Shrubs Based on Stable Isotopes in the Loess Hill, China

Cited by 15 publications

References 43 publications

Recharge and Infiltration Mechanisms of Soil Water in the Floodplain Revealed by Water-Stable Isotopes in the Upper Yellow River

Recharge and Infiltration Mechanisms of Soil Water in the Floodplain Revealed by Water-Stable Isotopes in the Upper Yellow River

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

Soil Water Use Strategies of Dominant Tree Species Based on Stable Isotopes in Subtropical Regions, Central China

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