Data from 14 stands of Scots Pine (Pinus sylvestris) at two locations in Siberia have been compiled by Dr. Olga Krankina of Oregon State University, U.S.A. These plots represent one of the main dominant tree species in Siberian forests, growing in stands of relatively high density and productivity. The data reported previously in Gabeev (1990) were gathered from stands studied under the former U.S.S.R. International Biological Programme in Tomsk Region, Western Siberia (approximately 58 N 83 E; 54-year mean precipitation = 501.2 mm). Above-ground measurements were obtained using standard allometric forestry methods, and below-ground data were originally reported in considerable detail by size class and depth. Data reported previously by Buzykin (1978) are from a study of carbon and nutrient cycling in the forests of the Angara River basin, Irkutsk Region, near Lake Baikal (approximately 53 N 103 E). Here Scots Pine (Pinus sylvestris) is the dominant tree species on about 26 percent of the forested area. The three study sites represent the three most common site conditions found in this area. Trees were measured by standard allometric methods on 0.3-0.4 hectare plots, and understory was determined from 20 x 0.25 hectare plots at each site for three successive years. Data on litterfall are mean values, 1968-1974, and were originally reported separately for needles, bark, branches, cones, and other litter. Below-ground biomass was determined by excavation of entire root systems, and root turnover was estimated for different size classes. Both authors have published extensively in the Russian literature.
Components of net primary productivity (NPP) and standing biomass, above- and below-ground, are available for each stand of Pinus sylvestris. The range of above-ground biomass was 5000-32700 g/m2 (25-163 tC/ha, assuming mean carbon content of 50 percent for wood and 45 percent for foliage); below-ground coarse roots ranged between 974 and 6430 g/m2 (5-32 tC/ha at 50 percent carbon content). Above-ground NPP averaged 905 g (438 gC)/m2/year and 765 g (374 gC)/m2/year for the Tomsk and Irkutsk studies, respectively; the corresponding mean figures for total NPP were 1018 g (489 gC)/m2/year and 1695 g (792 gC)/m2/year. Abstract from http://www-eosdis.ornl.gov/NPP/other_files/ssp_des.html.