Carbon deposition in forests of the ural federal district

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Abstract

A collection of published data concerning forest-forming species of Ural and adjacent regions in a number of 1230 plots of forest biomass (stems, branches, foliage, roots, and understory) and 245 plots of annual primary production was used to derive regression equations. The first-group equations describe the dependence of forest biomass on mass-forming factors — stand age and stem volume per hectare, the second-group ones — the dependence of primary production not only on the above-mentioned parameters, but also on foliage, roots, and understory biomass. Thus, these equations are compatible and recursively related. The first equations are tabulated on the basis of the National Forest Inventory System (NFIS) data organized in the form of matrices of distribution of forested areas of the Ural Federal District (UFD) according to stand age and stem volume per hectare. The second-group equations were tabulated using not only the latter values but also the fraction biomass values obtained at the first stage. The carbon pool in UFD is 2679 million tons and annual carbon deposition (without soil respiration) is 165 million tons (6.2% of the total carbon pool). The maps of distribution of carbon pool and carbon deposition per hectare over the area of 150 forest farms of UFD show the zonal “productivity profile” — consequent increase in these parameters along the direction from forest-tundra to the Ural mountain taiga forests and the subsequent decrease southward to the zone of steppe.

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