Ridge-pool complexes of bogs in the middle taiga

Abstract

Ridge-pool complex is typical for oligotrophic bogs of the middle taiga of Western Siberia. Vegetation monitoring shows that with a constant species composition of ecosystem vegetation, productivity (reserves of phytomass, mortmass and production) changes on average by 10-20 % due to weather conditions. In hot years, the production was 650-1100 g/m per year, while the reserves of live phytomass were 1200-2230 g/m, depending on the type of ecosystem. In cool and humid conditions, net primary production decreased to 660-830 g/m per year, while the stocks of live phytomass in different bog ecosystems were 1300-1600 g/m. On elevated relief elements in pine-shrub-sphagnum plant communities of ridges in hot years in the lake complex, the production reached a high value - 990 g/m per year. The more watered ecosystems of the basin of the lake complex remained the most productive (830 g/m per year). On lower relief elements in the ecosystems of hollows, the greatest contribution to the formation of total production is made by the underground organs of grasses, which make up more than 50-60 % of all production. The stocks of phytomass and net primary production in the hollows of these complexes are higher than in the hollows of the ridge-hollow complexes.