Дыхание почв лесных экосистем юга Дальнего Востока

Почвоведение. 2023. № 9. С. 1023–1033.

Иванов А. В., Zamolodchikov D., Сало М. В., Клндратова А. В., Пилецкая О. А., Брянин С. В.

 The Far East has been and remains the part of Russia least studied with respect to carbon fluxes. We reviewed the results of in situ measurements of carbon emission from the surface of forest soils obtained at 26 points in the southern part of the Far East on the territory of 4 constituent entities of Russia. The measurements were taken in different forest formations (larch, cedar, oak, ash, and elm forests), including forests in the permafrost zone. Information on seasonal and daily dynamics of emission is presented. Equations are presented for 14 sites to estimate the emission from the air temperature of the nearest weather station. Annual fluxes vary by measurement points in the range of 5.5–10.1 t C/ha, with a maximum value in the old-growth cedar-fir forest of southern Primorye. The contribution of the summer season to the annual flux is 49–81%. In the western part of the territory under consideration (Buryatia), carbon emission from the soil surface strongly depends on soil temperature and moisture. In over moistened soils, the emission is significantly affected by the groundwater level (R2 = 0.42). In Primorye forests, the soil moisture factor ceases to have a significant effect on the emission. Discussion of the results in the context of modern studies in other regions shows comparability of the survey estimates and possibility of their use for analysis of global trends and regularities.

Keywords: CO2 emissions, air temperature, температура воздуха, Soil organic carbon, soil temperature, forest formations, эмиссия СО2, органический углерод почвы, температура почвы, лесные формации