Ecological and cenotic approach to zoning of the forest fund of suburban forests of Barnaul

Abstract

The species composition of pine plantations in the forest fund of the Barnaul Forestry, which is part of the suburban territory of Barnaul, was studied on a forest typological basis. A total of 165 species of vascular plants have been identified, of which 3 species form a stand, 26 species of undergrowth, and 136 species of living ground cover. 39 synanthropic plant species (23.6 % of the total flora) were found in the lower tiers of the forest, including 14 anthropophytic species in the undergrowth, 5 anthropophytic and 20 apophytic species in the living ground cover. A richer floral composition is characteristic of the grass forest type, compared with the fresh forest type, which is associated with different forest growing conditions. Anthropogenic factors lead to an increase in the species composition of pine plantations near the city limits – more intensively in the grass forest (r = -0.74), less intensively in the fresh forest (r = -0.39). As we move away from the city limits, the ratio of ecological and cenotic components changes in pine plantations: the share of the forest component increases, the share of the synanthropic component decreases. Among the synanthropic plants of the lower tiers, aggressive species (Malus baccata (L.) Borkh., Acer negundo L.) are noted, which strongly transform the forest environment, preventing the renewal of the main breed. The value of the index of synanthropization of the species composition of pine plantations varies with distance from the city limits: 0,28–0,29 – 0–4 km; 0,12–0,20 – 4–11 km; 0,03–0,07 – 15–43 km, therefore, the forest fund of the forestry can be divided into 3 zones – high, moderate and weak anthropogenic transformation. We recommend using the data obtained for complex zoning of the territory of the Barnaul forestry in order to preserve suburban forests.