Long-term study on the seasonal water uptake of Platycladus orientalis in the Beijing mountain area, northern China

Deng, Wenping; Jia, Guodong; Liu, Yuanqiu; Chen, Qi; Huang, Jianhui; Wen, Linsheng; Zhangling,; Liu, Xiaojun; Jia, Jianbo; Songli, Peng

doi:10.1016/j.agrformet.2021.108531

Cited by 13 publications

(7 citation statements)

References 57 publications

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“…Therefore, Q. variabilis preferentially obtains water from deep soil at night and simultaneously draws water from the surface and deep soil layers during drought. This water‐use pattern of Q. variabilis favourable regulates the rhizosphere water and improves the photosynthetic rate by increasing carbon absorption (Wenping et al, 2021). The periodic night fluctuations of the SWC in the shallow layer during drought also indicate a possible HR phenomenon (Figure 2).…”

Section: Discussionmentioning

confidence: 99%

Increased uptake of deep soil water promotes drought resistance in mixed forests

Liu

Ye²,

Jiang

et al. 2023

Plant Cell & Environment

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The intensity and frequency of droughts are projected to rise in recent years and adversely affect forests. Thus, information on plant water use and acclimation during and after droughts is crucial. This study used the stable isotope and thermal dissipation probes to detect the water‐use adaptation of mixed forests to drought using a precipitation gradient control experiment in the field. The results showed that Platycladus orientalis and Quercus variabilis mainly absorbed stable water from deep soil layers during the drought (32.05% and 28.2%, respectively). The synergetic nocturnal sap flow in both species replenished the water loss, but P. orientalis experienced a greater decline in transpiration acclimation to drought. The transpiration of Q. variabilis remained high since it was mainly induced by radiation. After short‐term exposure to drought, P. orientalis majorly obtained shallow soil water, confirming its sensitivity to shallow water. Contrarily, Q. variabilis mainly absorbed stable water from deep soil layers regardless of the soil water content. Therefore, these findings suggest that Q. variabilis cannot physiologically adjust to extreme drought events, possibly limiting their future distributions and altering the composition of boreal forests.

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Section: Discussionmentioning

confidence: 99%

Increased uptake of deep soil water promotes drought resistance in mixed forests

Liu

Ye²,

Jiang

et al. 2023

Plant Cell & Environment

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“…As the applicability of tracers and mixing models varies in space and time (Barbeta et al, 2021;Deng et al, 2021), this study has evaluated the accuracy of four tracers, two xylem water deuterium bias correction methods, and four mixing models, and recommended 2 H 18 O with MixSIAR as the best method for plant water source partitioning in areas with climate and vegetation similar to this study. In particular, the proposed framework evaluates and selects methods considering multiple uncertainty components, and can provide useful technical information for plant water source partitioning and other similar studies.…”

Section: How To Select Plant Water Source Partitioning Methods?mentioning

confidence: 99%

Untangling the Uncertainties in Plant Water Source Partitioning With Isotopes

Gai,

Shi,

2023

Water Resources Research

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Plant water source partitioning suffers from multiple uncertainty sources including tracers, depleted xylem water deuterium, and mixing models, but the uncertainties have rarely been systematically evaluated. Taking apple trees of different ages as example, we combined four tracers of different characteristics (2H, 3H, 17O, and 18O), two xylem water deuterium bias correction methods (soil water excess and stem relative water content), and four mixing models (IsoSource, SIAR, MixSIR, and MixSIAR) to quantify the total uncertainty and the uncertainty of each component. For the total uncertainty, the contributions of the mixing models were the largest (37%), followed by those of tracers (28%) and interaction of tracers and models (27%), while the contributions of other sources were the smallest (8%). In particular, the xylem water deuterium bias correction methods had an uncertainty of 2%, implying its minor role in deviating plant water source partitioning. After evaluating the performance of the three components with four target functions, we recommend tracer combination of 2H18O with MixSIAR as the best framework for water source partitioning of apple trees on the Loess Plateau. The decomposed uncertainties and recommended methods provide technical support and promote understanding of variable results in plant water source partitioning.

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“…Variations of SWC and isotopes in shallow soil may be influenced by precipitation recharge and soil evaporation (Rossatto et al, 2012;Tiemuerbieke et al, 2018;Wang et al, 2017). Some previous studies have also found that SWC and isotope composition in deep soils showed lower temporal variability than that in shallow soils in some arid areas (Deng et al, 2021;Penna et al, 2013;Yang et al, 2014).…”

Section: The Variation Of Plant Water-source Utilizationmentioning

confidence: 96%

Water use patterns of dominant species of riparian wetlands in arid areas

Zhu

Lin

et al. 2023

Hydrological Processes

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Water resource shortage in arid areas is the main cause of ecological problems. Understanding plant water use patterns is essential for understanding soil–plant interactions and assessing the adaptability of plants in ecosystems with limited water resources. Riparian wetlands are functional transition areas connecting aquatic ecosystems and terrestrial ecosystems. Wetland vegetation restoration is of great significance to water conservation and ecological balance. Using isotope tracing method, our study clarified the water use patterns of dominant plants in typical riparian wetlands in arid areas. The results showed that the dominant herbal species of Salsola affinis mainly used 0–60 cm soil water (48.96%). Salsola affinis, which continuously obtains water from shallow soil, may be difficult to survive in extreme drought conditions. If it withered significantly aged in the dry season, it would have a negative ecological impact. The dominant tree species of Salix matsudana Koidz mainly used 20–100 cm soil water (43.99%) and groundwater (23.16%). With increasing water stress, S. matsudana Koidz had a greater degree of ecological plasticity and can use water from deeper soils. However, S. matsudana Koidz can continuously obtained water from deep soil and groundwater, which may weaken the water and soil conservation capacity of the wetland. In addition, the lc‐excess value of soil water showed that the soil evaporation intensity of grassland was higher than that of forest land, and the surface evaporation depth reached 60 cm. Our findings will help better understand the impact of vegetation restoration plan (artificial forest land and natural grassland) on the hydrological process of riparian wetland in arid areas, and provide reference for plant species selection and water resources management.

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Long-term study on the seasonal water uptake of Platycladus orientalis in the Beijing mountain area, northern China

Cited by 13 publications

References 57 publications

Increased uptake of deep soil water promotes drought resistance in mixed forests

Increased uptake of deep soil water promotes drought resistance in mixed forests

Untangling the Uncertainties in Plant Water Source Partitioning With Isotopes

Water use patterns of dominant species of riparian wetlands in arid areas

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