iForest - Biogeosciences and Forestry


Factors of soil CO2 emission in boreal forests: evidence from Central Siberia

Anastasia V Makhnykina (1-2)   , Ivan I Tychkov (2), Anatoly S Prokushkin (1-2), Anton I Pyzhev (2-3), Eugene A Vaganov (1-2-3)

iForest - Biogeosciences and Forestry, Volume 16, Issue 2, Pages 86-94 (2023)
doi: https://doi.org/10.3832/ifor4097-016
Published: Mar 19, 2023 - Copyright © 2023 SISEF

Research Articles

Soils of boreal forests are crucial carbon reserves. The response of soil carbon emission to climate change significantly affects the concentration of carbon dioxide in the atmosphere. Soil carbon emission models frequently show a nonlinear response to temperature, but soil moisture is an important limiting factor, often overlooked in energy limited ecosystems. We suggest a statistical model of soil CO2 emission constrained by soil moisture and temperature for different ecosystems in the boreal zone. We tested this modelling strategy using direct measurements of seasonal soil CO2 emission near the research observatory ZOTTO near the Bor settlement, Central Siberia, Russia, in 2012-2017. Soil moisture explained a significant amount of variability of soil emission: the adjusted R2 was twice higher than in the baseline model. Although the temperature-only model describes the annual variability of carbon dioxide emissions quite well, the addition of moisture measurement significantly refines the quality of prediction of the seasonal component dynamics. Models including both temperature and soil moisture could serve as a promising tool to analyze the carbon cycle in boreal forest ecosystems.


Boreal Forests, Soil CO2 Emission, Soil Temperature, Soil Moisture, Carbon Cycle, Climate Change, Exponential Model

Authors’ address

Anastasia V Makhnykina 0000-0002-2324-3975
Anatoly S Prokushkin 0000-0001-8721-2142
Eugene A Vaganov 0000-0001-9168-1152
V.N. Sukachev Institute of Forest, Siberian Branch of the Russian Academy of Sciences 660036, Krasnoyarsk (Russia)
Anton I Pyzhev 0000-0001-7909-3227
Eugene A Vaganov 0000-0001-9168-1152
Center for Forest Ecology and Productivity, Russian Academy of Sciences 117997, Moscow (Russia)

Corresponding author

Anastasia V Makhnykina


Makhnykina AV, Tychkov II, Prokushkin AS, Pyzhev AI, Vaganov EA (2023). Factors of soil CO2 emission in boreal forests: evidence from Central Siberia. iForest 16: 86-94. - doi: 10.3832/ifor4097-016

Academic Editor

Ana Rey

Paper history

Received: Mar 09, 2022
Accepted: Jan 02, 2023

First online: Mar 19, 2023
Publication Date: Apr 30, 2023
Publication Time: 2.53 months

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