Fire Impact on the Formation and Development of the Boreal Pine Wooded Mires

Based on the analysis of botanical composition organic-mineral soil layer and peat, dendrochronological radiocarbon datings, we performed reconstruction development six pine wooded sphagnum bogs located in boreal zone Russia. Most under study followed endogenesis patterns with vegetation cover gradually changing, peat growing, substrate trophicity declining shrub-sphagnous forming modern conditions. Emerging pyrogenic layers charcoals indicate that sites were constantly affected by fires, which periodically interrupted endogenous bogs, especially during warmest Holocene periods.