Home – Home – Jornals – Flora and Vegetation of Asian Russia 2025 number 2

Environmental monitoring of urban and suburban forests is the basis for their conservation, rational use and improvement. Suburban forests of the City of Barnaul, represented by pine plantations of the Barnaul ribbon pine forest, are subject to long-term anthropogenic load. The purpose of this work is to identify the floristic composition of suburban pine forests of the City of Barnaul on a forest typological basis and compare them by studying individual partial floras (PF). The material was collected in forest communities on 36 sample plots (SP) located within the Barnaul Forestry at different distances from the city limits of Barnaul. The sample plots are 50 50 m (0.25 ha) in size and are laid in pine plantations related to the most common forest types in the forest fund: fresh and grassy pine forest. During the growing season of 2023-2024, geobotanical descriptions were carried out on each PP with the determination of the species composition and its projective cover. Comparative analysis of partial floras of pine stands showed that forest communities of grass forest are richer in the number of families, genera and species than communities of fresh forest. With increasing distance from the city (0-15 km), the taxonomic richness of the aboriginal fraction of PF decreases in stands of both forest types, and levels out in intact forest areas (15-34 km). The increase in the number of taxa in PF near the city limits is associated with the active introduction of non-forest elements - meadow and synanthropic ones. The basis of communities is formed by the following: by the nature of latitudinal distribution - boreal-nemoral and boreal species; by longitudinal distribution - species with the Eurasian range; in relation to moisture - mesophytes; by cenotic confinement - forest edge and forest. The participation of adventive taxa in the composition of the grass and fresh pine forest PF is indicative - species, genera and families, the share of which decreases sharply with distance from the city limits. The most aggressive transforming species is Acer negundo which penetrated into grass forest communities where it formed a dense undergrowth preventing the natural regeneration of the main forest-forming species - Pinus sylvestris .