Rainfall interception using the revised Gash analytical model for Pinus sylvestris var. mongolica in a semi-humid region of NE China

Deng, Junliang; Yu, Yafan; Shao, Jie; Lu, Shuaiyu; Liu, Fangyu; Li, Zhiqiang; Shi, Xiaoliang

doi:10.1016/j.ecolind.2022.109399

Cited by 8 publications

(2 citation statements)

References 68 publications

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“…Although increased gs could enhance CO2 uptake and subsequent photosynthesis and growth [57,63], the current precipitation levels in these regions cannot meet the water needs of P. sylvestris. Canopy interception accounted for about 36.0% of P [9,21], making this phenomenon much harsher. Surprisingly, in mature and young forests, the transpiration rate remained consistent, which was contrary to the hydraulic limitation hypothesis and our third hypothesis.…”

Section: Quantification the Mechanisms Of Plant Water Transport Regul...mentioning

confidence: 99%

“…Climate projections for the next decade indicate increased dryness in this region [4,5], potentially impacting global forest ecosystems and ecosystem services [6], reducing terrestrial net productivity [7], and altering carbon dynamics [8]. China grapples with desertification in vast areas (approximately 2.61 billion ha) due to high human population density and limited natural resources [9,10]. Mu Us (107°20-111°30E, 37°30-39°20N), and Horqin (118°35-123°30E, 42°21-42°21N) deserts in Northern China face soil erosion and sand drift issues [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Variations in Hydraulic Regulation of Whole-Tree Transpiration in Mongolian Pine Plantations: Insights From Semiarid Deserts in Northern China

Deng,

Wan,

Bao

et al. 2024

Preprint

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Seasonal precipitation variance significantly alters soil water content, potentially inducing water stress and affecting plant transpiration in semiarid deserts. This study explored the effects of environmental variables and hydraulic conductance on whole-tree transpiration (ET) in Mongolian pines (Pinus sylvestris var. mongolica) across different forest stages in the semiarid deserts of northern China. We measured ET using sap flow in mature (MMP), half-mature (HMP), and young (YMP) Mongolian pine plantations. Measurements included soil-leaf water potential difference (ΔΨ), atmospheric conditions, and soil moisture contents on sunny days, both in dry and wet periods. Seasonally variable rainfall distinctly affected soil moisture, correlating ET with photosynthetically active radiation (PAR) and vapor pressure deficit (VPD). Notable nocturnal sap flow occurred during the growing season. During the dry periods, both stomatal and hydraulic conductance influenced ET, whereas during the wet periods, stomatal conductance primarily regulated it. Discrepancies between predicted and measured ET were noticed: compared to the predicted ET, measured ET was lower during dry periods while higher during wet periods. Hydraulic conductance (KT) increased with tree height (H) and ΔΨ, although tall trees exhibited lower KT rates, suggesting that hydraulic compensation had occurred. This compensation, observed between 11:00 and 13:00, aligned with increased hydraulic resistance during dry periods. Decreasing hydraulic conductance intensified leaf water stress in dry periods, especially during the time when PAR and VPD were heightened, potentially increasing stomatal sensitivity to drought, promoting water conservation and plant survival. A linear relationship between predawn and midday leaf water potentials was noticed, indicating extreme anisohydric behavior across forest stages during both dry and wet periods. Although both stomatal and hydraulic conductance influenced ET during the dry period, MMP and YMP were more susceptible to drought conditions. Understanding these dynamics could help evaluate semiarid desert ecological functions for water conservation amidst uneven seasonal precipitation in Northern China.

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Section: Quantification the Mechanisms Of Plant Water Transport Regul...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seasonal Variations in Hydraulic Regulation of Whole-Tree Transpiration in Mongolian Pine Plantations: Insights From Semiarid Deserts in Northern China

Deng,

Wan,

Bao

et al. 2024

Preprint

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Responses of canopy hydrometorological parameters to oak dieback in the Mediterranean sparse forest, Iran

Sadeghi,

Panahandeh,

Van Stan

et al. 2023

Agricultural and Forest Meteorology

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Changes of Rainfall Partitioning and Canopy Interception Modeling after Progressive Thinning in Two Shrub Plantations on the Chinese Loess Plateau

Niu

Fan

et al. 2023

Journal of Hydrology

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Rainfall interception using the revised Gash analytical model for Pinus sylvestris var. mongolica in a semi-humid region of NE China

Cited by 8 publications

References 68 publications

Seasonal Variations in Hydraulic Regulation of Whole-Tree Transpiration in Mongolian Pine Plantations: Insights From Semiarid Deserts in Northern China

Seasonal Variations in Hydraulic Regulation of Whole-Tree Transpiration in Mongolian Pine Plantations: Insights From Semiarid Deserts in Northern China

Responses of canopy hydrometorological parameters to oak dieback in the Mediterranean sparse forest, Iran

Changes of Rainfall Partitioning and Canopy Interception Modeling after Progressive Thinning in Two Shrub Plantations on the Chinese Loess Plateau

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