Effect of Fires on the Ecosystems of Subtaiga – Forest-Steppe Pine Forests in the South-Western Pribaikalia
Yu. N. KRASNOSHCHEKOV, M. D. EVDOKIMENKO, Yu. S. CHEREDNIKOVA
V. N. Sukachev Institute of Forest, SB RAS, 660036, Krasnoyarsk, Akademgorodok
Keywords: subtaiga – forest-steppe pine forests, surface fire of forest floor – humus type, pyrogenic successions of vegetation, soil morphology, organogenic pyrogenic saoil horizons, ash chemical composition of forest floor, physicochemical properties of soil
Abstract
Data of the experimental investigation of postfire digression of the subtaiga – forest-steppe pine forests in the South-Western Pribaikalia are analyzed. It was established that the surface fire of forest floor – humus type are the major destructive factor in the dynamics of pine forests. The action of the surface fire is accompanied by tree dryout, while the vitality of the trees that survived in fire depends on the severity of fire damage. Characterization of the lower plant storeys and its dynamics under the effect of middle-intensity fire events are presented. A negative effect of surface fire on the changes of the stand, qualitative fractional composition of organogenic soil horizons and their chemical composition was demonstrated.
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