Scots Pine NPP Dataset (Siberia)- data from 14 boreal forest stands in eastern Russia

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.

美国俄勒冈州立大学的奥尔加·克兰基娜（Olga Krankina）博士汇编了西伯利亚两个地点共14个欧洲赤松（Pinus sylvestris）林分的数据。这些样地代表了西伯利亚森林中的主要优势树种之一，林分密度与生产力均处于较高水平。此前发表于Gabeev（1990）的数据集，采集自前苏联国际生物计划在西西伯利亚托木斯克地区开展的林分研究（坐标约为北纬58°、东经83°；54年平均降水量为501.2毫米）。该研究采用标准森林异速生长方法开展地上部分测量，地下数据最初按径级与深度进行了详细报道。Buzykin（1978）此前报道的数据，源自贝加尔湖附近伊尔库茨克地区安加拉河流域的森林碳与养分循环研究（坐标约为北纬53°、东经103°），该区域内欧洲赤松为优势树种，覆盖约26%的森林面积。本次研究的三个样地代表了该区域最常见的三类立地条件：研究人员在0.3至0.4公顷的样地中采用标准异速生长方法测定树木参数，并在每个样地设置20个0.25公顷的林下样地，连续三年调查林下植被状况。凋落物数据为1968-1974年的平均值，最初按针叶、树皮、枝条、球果及其他凋落物类别分别报道。地下生物量通过挖掘完整根系系统测定，并针对不同径级估算了根系周转率。两位作者均在俄罗斯学术文献中发表过大量研究成果。本数据集包含各欧洲赤松林分的净初级生产力（Net Primary Productivity, NPP）组分以及地上、地下现存生物量数据：地上生物量范围为5000~32700 g/m²（按木材平均碳含量50%、叶片45%计算，对应25~163 tC/ha）；地下粗根生物量介于974~6430 g/m²（按50%碳含量计算，对应5~32 tC/ha）。托木斯克与伊尔库茨克研究的地上净初级生产力平均值分别为905 g（438 gC）/m²/年与765 g（374 gC）/m²/年；总净初级生产力的对应平均值分别为1018 g（489 gC）/m²/年与1695 g（792 gC）/m²/年。本数据集摘要源自http://www-eosdis.ornl.gov/NPP/other_files/ssp_des.html。