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A Study on the Response Characteristics of Carbon Flux Exchange in Chinese Fir Forests to Vapor Pressure Deficit

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  • Zhenxiang Liu

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Yongqian Wang

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Luming Sun

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Jing Jiang

    (Feixi County Meteorological Bureau, Hefei 231200, China)

  • Lan Jiang

    (Feidong County Meteorological Bureau, Hefei 231699, China)

  • Mengtao Wang

    (Fuyang Meteorological Bureau, Fuyang 236300, China)

  • Jingjing Ye

    (Mingguang Meteorological Bureau, Chuzhou 239400, China)

  • Zhiqing Cheng

    (College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

Abstract

Forest carbon exchange is affected by various environmental variables, among which photosynthetically active radiation, temperature, saturated water vapor pressure deficit, and soil moisture content dominate. The global atmospheric temperature has risen significantly in recent decades, and the saturated water vapor pressure deficit has also increased, which has had a widespread and lasting impact on terrestrial carbon sinks. Here, using flux data from Mazongling in Jinzhai County from July 2020 to June 2023, the relationship between saturated water vapor pressure deficit and forest carbon flux was investigated on the basis of carbon flux changes in the forest ecosystem in response to environmental factors. Results revealed that vapor pressure deficit (VPD) and net ecosystem productivity (NEP) exhibited a quadratic relationship at the daily and monthly scales. When the VPD was greater than 1.2 kPa at the monthly scale, the NEP of the fir forest ecosystem decreased with increasing VPD. At the daily scale, the impact of the VPD on NEP was studied by month and season. The results revealed that the threshold value at which the VPD affected NEP differed across different months and seasons. Therefore, the VPD is an important factor in forest ecosystems and should be considered in the assessment of ecosystem carbon sinks. It also has far-reaching significance in the carbon cycle and ecological sustainable development.

Suggested Citation

  • Zhenxiang Liu & Yongqian Wang & Luming Sun & Jing Jiang & Lan Jiang & Mengtao Wang & Jingjing Ye & Zhiqing Cheng, 2024. "A Study on the Response Characteristics of Carbon Flux Exchange in Chinese Fir Forests to Vapor Pressure Deficit," Sustainability, MDPI, vol. 16(24), pages 1-18, December.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:24:p:10906-:d:1542521
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    References listed on IDEAS

    as
    1. Zihao Man & Shengquan Che & Changkun Xie & Ruiyuan Jiang & Anze Liang & Hao Wu, 2021. "Effect of Climate Change on CO 2 Flux in Temperate Grassland, Subtropical Artificial Coniferous Forest and Tropical Rain Forest Ecosystems," IJERPH, MDPI, vol. 18(24), pages 1-18, December.
    2. Kosaku Masuda & Isao T. Tokuda & Norihito Nakamichi & Hirokazu Fukuda, 2021. "The singularity response reveals entrainment properties of the plant circadian clock," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
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