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Organic carbon in vegetal biomass of forests in Kyiv region

Carbon sequestrative capacity of forest plant communities is one of the main criteria for the potential for low-carbon development of the country and the fulfillment of international obligations in the context of the Paris climate agreement. The information basis of the research is formed by information from the database of IA "Ukrderzhlisproekt", which contains the detailed biometric characteristics of forest stands located in the research region. Another component is represented by a system of mathematical models for quantitative assessment of live biomass and forest dead organic matter. As a result, in this research we have determined the quantitative values of organic carbon content in live biomass and dead organic matter of forests of Kyiv region. In total, the amount of carbon accumulated in vegetal biomass of the region's forests equals 61.8 million tons, of which 60 % is accounted for by pine stands. The share of carbon accumulated in dead organic matter is 10.5 %. The highest density of sequestered carbon per unit area is typical for ash and oak stands with indicators of 10.08 and 9.921 kg∙(m2)-1, respectively. More than 40 % of organic carbon is accumulated in vegetal biomass of stands of I site index class, which mainly grow in relatively poor forest conditions. Recreational, health-improving and protective forests of the region are characterized by the highest indicators of organic carbon density per unit area – 10.53 and 10.49 kg∙(m2)-1, respectively. Among the objects of the nature reserve fund, the dominant positions in the volume of the studied indicator belong to nature reserves – 82.7 %, national nature parks account for another 8 %. In the total structure of carbon capacity of dead organic matter (6.5 million tons) more than 60% belongs to forest litter. At the same time, carbon content in dead organic matter of coniferous stands equals 4.1 million tons, or 62.9 %. The results of the research will serve as an information basis for the formation of a strategy for regional low-carbon development.