Carbon pool of tree litter of pine forests in the subtaigaforest-steppe region of Central Siberia for the growing season of 2022

Due to the increasing relevance of work on the assessment of the carbon budget of forest-covered territories, today one of the main problems is the clarification of data on the reserves of deposited carbon by different forest components. The aim of the study is to assess the dynamics of phytomass input and carbon pool of above-ground litter in pine stands on the territory of the subtaiga-forest-steppe region of Central Siberia. Trial areas based on the modality of the stand species composition and forest growing conditions have been laid on the territory of the educational and experimental forestry belonging to Reshetnev Siberian State University of Science and Technology (SibGU), which is located in the suburban area of Krasnoyarsk city. The taxational description of the studied plantings was carried out, as well as collecting morphological information regarding the incoming tree litter for the growing season of 2022. The analysis and processing of the data obtained during the field and cameral periods were made, such as: the absolutely dry mass of each component of the litter fractions, the stocks of litter and carbon per area unit, the tree litter proportion from the mass of the forest litter and the growth stage of the tree litter accumulation. The results of the study showed that the share of the active fraction was 77.9%, while the inactive fraction was 22.1%; the predominance in the total mass was revealed in the needles of the common pine (Pinus predominance in the total mass was revealed in the needles of the common pine (Pinus sylvestris L.) up to 61%; the mass of deposited carbon of the litter varied on the sample areas from 1.0±0.12 t C ha^–1 to 1.6±0.26 t C ha^–1. Uneven accumulation in terms of components and duration of the process was also noted. The results obtained will be used to refine the data when assessing the carbon-depositing function of forests on the territory of the subtaiga-forest-steppe region of Central Siberia.

1. Abramova E.R., Brianin S.V. Decomposition of sediment in post-pyrogenic larch forests of the Tukuringra Range (Upper Priamurye). Siberian Forest Journal, 2018, no. 2, pp. 71–77. (In Russ.)

2. Bazilevich N.I. et al. Methods for studying the biological cycle in different natural areas. M.: Mysl, 1978. 185 p. (In Russ.)

3. Baietto A., Hernández J., del Pino A. Comparative Dynamics of Above-Ground Litter Production and Decomposition from Eucalyptus grandis Hill ex Maiden and Pinus taeda L., and Their Contribution to Soil Organic Carbon. Forests, 2021, vol. 12, no. 3, рр. 349.

4. Fedorov B.G. The Russian carbon balance: a monograph. M.: Scientific Adviser Limited Liability Company, 2017. 82 p. (In Russ.)

5. Ivanova E.A. Formation and decomposition of woody debris in forest ecosystems under background conditions and under aerotechnogenic pollution. Voprosy lesnoy nauki, 2021, no. 4 (3), pp. 1–52. (In Russ.)

6. Jasińska J., Sewerniak P., Puchałka R. Litterfall in a Scots Pine Forest on Inland Dunes in Central Europe: Mass, Seasonal Dynamics and Chemistry/ Forests. 2020. vol. 11, no. 6. p. 678.

7. Karpachevskii L.O. Forest and forest soils. M.: Forest Industry, 1981. 264 p. (In Russ.)

8. Kuznetsov M.A. Effect of decomposition conditions and composition of litter on litter characteristics and stock in a mid-mediterranean bilberry-sphagnum spruce forest. Forest Science, 2010, no. 6, pp. 54–60. (In Russ.)

9. Kuznetsov M.A., Osipov A.F. The vegetation litter as a component of the biological carbon cycle in waterlogged coniferous communities of the Middle Taiga. Bulletin of the Institute of Biology of the Komi Scientific Centre of the Ural Branch of the Russian Academy of Sciences, 2011, no. 9, pp. 10–12. (In Russ.)

10. Kuznetsova A.I. Influence of vegetation on soil carbon stocks in forests. Voprosy lesnoy nauki, 2021, vol. 4, no. 4, рр. 41–95. (In Russ.)

11. Lianguzova I.V. et al. Spatial distribution of ground cover and forest litter stocks in background and defoliation pine forests of the Kola Peninsula. Plant resources, 2020, vol. 56, no. 4, рр. 335–350. (In Russ.)

12. Likhanova N.V. The role of plant debris in the formation of forest litter in logged areas of middle taiga spruce forests. IVUZ. Journal of Forestry, 2014, no. 3, pp. 52–66. (In Russ.)

13. Malysheva N.V., Moiseev B.N., Filipchuk A.N. Methods for estimating the carbon balance in forest ecosystems and how they can be used to calculate annual carbon deposition. MSUL Bulletin, 2017, no. 1, pp. 4–13. (In Russ.)

14. Nazarenko A.E., Krasnoiarova B. A. Cost estimation of ecosystem services of carbon sequestration by ecosystems of Altai Krai as a component of transition to sustainable development. Geopolitics and eco-geodynamics of regions, 2018, vol. 4 (14), no. 3, рр. 89–99. (In Russ.)

15. Osipov A.F. Organic carbon stocks and fluxes in a mature bilberry pine forest ecosystem of the Middle Taiga. Siberian Forest Journal, 2017, no. 2, pp. 70–80. (In Russ.)

16. Reshetnikova T.V. Forest litter as a depot of biogenic elements. Krasnoyarsk State Agrarian University Bulletin, 2011, no. 12, pp. 75–82. (In Russ.)

17. Rodin L.E., Remezov N.P., Bazilevich N.I. Methodological guidelines for the study of dynamics and biological cycling in phytocenoses. L.: Nauka, 1967. 145 p. (In Russ.)

18. Solodovnikov A.N. Peculiarities of initial decomposition of pine needles in lingonberry pine forests in the middle taiga subzone of Karelia. Proceedings of the Karelian Research Center of the Russian Academy of Sciences, 2019, no. 11, pp. 97– 106. (In Russ.)

19. Stetsenko A.V., Safonov G.V. Investment in Russia's Forests: Methodological Foundations. M.: MAKS Press, 2010. 134 p. (In Russ.)

20. Tsykunov I.A. Accumulation of forest litter in pine stands. Forest Science and Forestry: A Republican Interdepartmental Collection, 1974, no. 8, рр. 52–55. (In Russ.)

21. Węgiel A., Polowy K. Aboveground Carbon Content and Storage in Mature Scots Pine Stands of Different Densities. Forests, 2020, vol. 11, no. 2, p. 240.

22. Zamolodchikov D.G., Grabovskii V.I., Kraev G.N. Dynamics of the Russian forest carbon budget over the last two decades. Forest Science, 2011, no. 6, pp. 16– 28. (In Russ.)

23. Zemskov F.I. Detritogenesis in forest biogeocenoses of urbanized areas: Ph. 219 p. (In Russ.)

24. Zhukova A.I., Grigorev I.V., Grigoreva O.I., Lediaeva A.S. Forest Resource Science: Training Manual. SPb.: SPb GLTA, 2008. 205 p. (In Russ.)