Home – Home – Jornals – Contemporary Problems of Ecology 2005 number 5

Results of comprehensive of reserves and structure of above-ground and subterranean biomass, data on the chemical composition of dominant plant species of typical mountain-tundra landscapes of the northern Okhotsk Sea shores, Upper Kolyma upland and the Arctic coasts of Chukotka are presented. It is found that mountain tundra ecosystems of the extreme northeast of Asia are characterized by a considerable accumulation of dead plant residues, which is determined by a discrepancy between the supply of leaf-fall and the rate of its decomposition, low temperatures, peculiarities of the environment conditions and a specific biochemical composition of plants. It is demonstrated that the annual consumption of chemical elements varies from 8,5 to 16,6 kg/ha. In small-shrub-lichen tundras, the series of absorption of chemical elements are practically identical, despite the differences in the ratios of structural components of vegetable mass. Characteristics of pedogenesis peculiarities in various types of mountain tundras that differ in the expression of Al-Fe process are presented.