NATURE © 2015: O.G. Chertov, A.S. Komarov, S.S. Bykhovets, J.S. Bhatti; ФНИ «XXI век» DIFFERENCE IN THE ECOLOGICAL STRATEGIES OF CONIFEROUS TREE SPECIES IN EUROPEAN AND CANADIAN BOREAL FORESTS: O.G. Chertov1 2 A MODELING ANALYSIS , A.S. Komarov2 1 University of Applied Sciences, Bingen, Germany; Institute of Physicochemical and Biological Problems in Soil Science, Russian Academy of Sciences, Puschino, Russia; 3 Canadian Forest Service, Northern Forestry Centre, Edmonton, Canada The role of net primary productivity (NPP) allocation to tree organs as a parameter reflecting the ecological strategy of trees is discussed. <...> The application of an individual-based spatially explicit simulation model of the tree-soil system (EFIMOD) to European and North American boreal forests reveals significant differences in ecological parameters (silvics) between, on one hand, North American jack pine (Pinus banksiana Lamb.) and black spruce (Picea mariana Mill.) of Canadian boreal forests and, on the other hand, European Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies L. [Karst.]). <...> The proportion of annual biomass increment reflected by NPP that is allocated to fine root production is higher in the North American coniferous species than in the European ones. <...> Simulation experiments were performed to investigate the influence of NPP allocation on the components of carbon balance and wood productivity. <...> The results showed considerable differences, which depended on the NPP allocation patterns, in tree growth rate, root development, and parameters of carbon balance. <...> On the other hand, trees with the European, more uniform, NPP allocation pattern showed higher growth rates compared with the Canadian trees even under the colder continental conditions of Central Canada. <...> NPP allocation index (NPP partitioning between leaves and fine roots) is proposed as a measure of tree stress tolerance, adaptation to severe climatic conditions, and ecological strategy. <...> Keywords: EFIMOD model, North-American and European coniferous tree species, NPP allocation pattern, carbon balance, turnover capacity, wood production. <...> Introduction Coniferous tree species are dominant in the boreal forest biome of the Northern hemisphere. <...> The evolutionary (genetically) determined allocation patterns of net primary productivity (NPP <...>