Features of carbon storage in larch stands in the lower Angara region

Abstract

The purpose of this work was to establish the features of the dynamics of carbon sequestration in the stands of Siberian larch (Larix sibirica Ledeb.) in the Lower Angara region. The results obtained can be used in developing a methodology for assessing the stocks of carbon sequestration in the phytomass of forest stands and forming a regulatory framework for assessing the sequestration potential of forest areas. Based on the materials of 10 trial plots with felling and measurement of 392 model trees, as well as natural census materials in the amount of 858 taxation sections, an analysis was made of the structure of the Siberian larch forest in the Lower Angara region. The age structure of the forest area, the features of the distribution of forest stocks in the forest area, the structure of the density of forest stands included in different age groups have been established. Mathematical models of the dynamics of the main taxation indicators of larch forests are obtained. The process is fairly accurately approximated by the Weibull function. The transition to the stock of deposited carbon was carried out using the conversion-volume method. Conversion coefficients were used that connect the fractional ratios of phytomass to the stock of forest stands (Ph/m) with the age of the latter. Conversion factors were then applied to establish stocks of sequestered carbon. The dynamics of stocks of deposited carbon with a high degree of adequacy corresponds to a mathematical model based on the Richards function.