In the summer of 2013–2019 soil-geochemical studies were carried out as part of complex landscape-geographical expeditions on the territory of the Primorsky ridge. Studies of landscapes, sampling of soils and rocks were carried out in river basins, in the char of the Primorsky ridge, near settlements at its foot (Northeastern Priolkhonye). Particular attention was given to territories affected by forest fires of different years, which in recent decades have become a big problem for the nature of the Baikal region. Forest fires have a great influence on the appearance and properties of the landscape and its components. For example, in soil exposed to fire, organic horizons burn out, partially or completely. A decrease in the level of acidity and a decrease in the humus content in pyrogenic soils have been established. A noticeable increase in the concentration of Ca, Ma, Mn, Cr, Cu, Co, Ni in pyrogenic turbine horizons (Tpir, Hpir, AYpir) was revealed due to the «ash» effect of their concentration, as well as mixing of rocks enriched with macro- and microelements. On the southern slopes, after complete burning of woody vegetation, steppe plant communities formed. Restoring indigenous landscapes is difficult due to the dry climate and the high permeability of soils and rocks.

Lopatina Darya Nikolaevna, Candidate of Sciences (Geography), Researcher, V. B. Sochava Institute of Geography SB RAS, 1, Ulan-Batorskaya st., Irkutsk, 664033, Russian Federation, e-mail: daryaneu@mail.ru 

Belozertseva Irina Aleksandrovna, Candidate of Sciences (Geography), Head, Laboratory of Landscape Geochemistry and Soil Geography, V.B. Sochava Institute of Geography SB RAS, 1, Ulan-Batorskaya st., Irkutsk, 664033, Russian Federation, e-mail: belozia@mail.ru

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