Estimation of Carbon Stock in Forest Soils of Sakhalin Region

Mukhortova, L. V. & Shchepashchenko, D.G. ORCID: https://orcid.org/0000-0002-7814-4990 (2023). Estimation of Carbon Stock in Forest Soils of Sakhalin Region. In: Physical and Mathematical Modeling of Earth and Environment Processes—2022. PMMEEP 2022. Eds. Karev, V.I., pp. 295-304 Cham: Springer. 10.1007/978-3-031-25962-3_30.

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Abstract

Forests play a significant role in the uptake of atmospheric carbon dioxide and carbon sequestration for a long time. In forests, the long-term carbon depositing mainly takes place in two pools: in tree biomass and in soil organic matter that have different sensitivity to the natural and anthropogenic disturbances. Estimation of these pool sizes and ratio is the first step to the assessment of regional forest carbon budget and prognosis of its feedback to the climate change and disturbances. In this study, we estimated carbon stock in forest soils of Sakhalin region using the information system developed to assess a spatially distributed soil organic carbon with the high resolution (1 km2). It was found that soil organic matter of forest ecosystems in the region have accumulated about 1230.9 Mt C that is three folds higher than carbon stock in the tree biomass. Forest litter contributes not more than 10% in the northern forest ecosystems and up to 3–4% in the southern forests. Distribution of total carbon stock (live tree biomass + soil organic matter) between above- and belowground pools indicated that 80.0–82.5% of the carbon is allocated in the soil, and forest litter—the component the most vulnerable to disturbances, accounts not more than 5–6% of this stock.

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