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Response of Bare Soil Respiration to Air and Soil Temperature Variations According to Different Models: A Case Study of an Urban Grassland

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  • Egor A. Dyukarev

    (Institute of Monitoring of Climatic and Ecological System SB RAS, Tomsk 634055, Russia
    Laboratory of Ecosystem-Atmosphere Interactions in Forest-Bog Complexes, Yugra State University, Khanty-Mansiysk 628012, Russia)

  • Sergey A. Kurakov

    (Institute of Monitoring of Climatic and Ecological System SB RAS, Tomsk 634055, Russia)

Abstract

Soil respiration is an important component of the global carbon cycle and is highly responsive to disturbances in the environment. Human impacts on the terrestrial ecosystem lead to changes in the environmental conditions, and following this, changes in soil respiration. Predicting soil respiration and its changes under future climatic and land-use conditions requires a clear understanding of the processes involved. The observation of CO 2 fluxes was conducted at an urban grassland, where plants were removed and respiration from bare soil was measured. Nine soil respiration models were applied to describe the temperature dependence of heterotrophic soil respiration. Modified models were suggested, including a linear relationship of the temperature sensitivity and base respiration coefficients with soil temperature at various depths. We demonstrate that modification improves the simulated soil respiration. The exponential and logistic models with linear dependences on the model parameters from the soil temperatures were the best models describing soil respiration fluxes. Variability of the apparent temperature sensitivity coefficient ( Q 10 ) was demonstrated, depending on the model used. The Q 10 value can be extremely high and does not reflect the actual relationships between soil respiration and temperature. Our findings have important implications for better understanding and accurately assessing the carbon cycling characteristics of terrestrial ecosystems in response to climate change in a temporal perspective.

Suggested Citation

  • Egor A. Dyukarev & Sergey A. Kurakov, 2023. "Response of Bare Soil Respiration to Air and Soil Temperature Variations According to Different Models: A Case Study of an Urban Grassland," Land, MDPI, vol. 12(5), pages 1-20, April.
  • Handle: RePEc:gam:jlands:v:12:y:2023:i:5:p:939-:d:1130214
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    References listed on IDEAS

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    1. Ben Bond-Lamberty & Vanessa L. Bailey & Min Chen & Christopher M. Gough & Rodrigo Vargas, 2018. "Globally rising soil heterotrophic respiration over recent decades," Nature, Nature, vol. 560(7716), pages 80-83, August.
    2. Eric A. Davidson & Ivan A. Janssens, 2006. "Temperature sensitivity of soil carbon decomposition and feedbacks to climate change," Nature, Nature, vol. 440(7081), pages 165-173, March.
    3. Xiongwen Chen & Wilfred Post & Richard Norby & Aimée Classen, 2011. "Modeling soil respiration and variations in source components using a multi-factor global climate change experiment," Climatic Change, Springer, vol. 107(3), pages 459-480, August.
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    Cited by:

    1. Yanqi Liu & Qin Peng, 2023. "Response of Soil Respiration to Altered Snow Cover in a Typical Temperate Grassland in China," Agriculture, MDPI, vol. 13(11), pages 1-15, October.

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