Succession of Vegetation after the High Intensity Firein a Pine Forest with Lichens
G. A. IVANOVA1, V. A. IVANOV2, N. M. KOVALEVA1, S. G. CONARD3, S. V. ZHILA1, P. A. TARASOV2
1V. N. Sukachev Institute of Forest, SB RAS, 660036, Kransnoyarsk, Akademgorodok, 50/28
2Siberian State Technological University, 60049, Kransnoyarsk, Mira ave., 82
3US Forest Service, Rocky Mountain Research Station, 5775 W US Highway 10, Missoula, MT, 59808, USA
Keywords: лесной пожар, сукцессия, сосняки, лесовозобновление, лесные горючие материалы, forest fire, succession, pine stand, reforestation, fuel loads
Abstract
The impact of experimental high intensity fire on components of an ecosystem and post fire succession was studied in middle taiga of pine forest over 20 years. About 44 % of forest fuel loads burned down during the fire. The emission of carbon was about 18 t C/he. The trees died for the first three years after the fire and there was essential accumulation of fuel loads. Twenty years later the fuel loads exceeded that before the fire by four times, which opened up possibilities for repeat high-intensity fires. The initial stage of post fire succession is specified by forest growth conditions and occurs with change of dominants of herbaceous-dwarf shrub cover in the pine forest. The agrochemical and hydro-thermal soil indicators changed after fire, which promoted natural regeneration of pine trees enough for formation of forest stand.
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