Ecologically correct forest management in city forests is impossible without full inventarisation of their biodiversity. Vegetation classification by the Braun-Blanquet method could be important step in the direction of the complex data base creation about city forests biodiversity as an essential part of ecological monitoring and planning of the forest management. The main aim of this research was comparative study of two forest areas with different level of disturbances in Novosibirsk city and their classification by the Braun-Blanquet method. In course of the detailed description 42 full geobotanical relèves were made as a basis for the classification. Depending on the level of the anthropogenic disturbances six syntaxa of the association and subassociation rank were described in city forests. Four of them were described first time. Natural forest vegetation of the area is presented by the two associations from Brachypodio pinnati-Betuletea pendulae class - Calamagrostio arundinaceae-Betuletum pendulae in mesic habitats and Trollio asiaticae-Populetum tremulae in moist habitats. Growing anthropogenic pressure in the modern megapolis leads to deep changes in the forest community structure and composition. Syntaxonomically this transformation could be described in two new subassociations Calamagrostio arundinaceae-Betuletum pendulae aceretosum negundi and Trollio asiaticae-Populetum tremulae aceretosum negundi respectively. They differ by the poor combination of the class diagnostic species and the presence of ruderal and meadow species including aggressive alien species. In case of the excessive anthropogenic pressure and soil eutrophication ruderal, nitrophylous and alien species start to dominate in community composition, especially in shrub layer. Such forests were described in frame of the new association Pino-Aceretum negundi with two subassociations typicum and impatientosum parviflorae, belonging to Robinietea class - spontaneous forests vegetation in city parks. Forests of this class are described in Siberia for the first time. So, vegetation classification of city forests by the Braun-Blanquet method gives possibilities to distinguish different stages of the anthropogenic transformation and to estimate recent forest conditions and their potential of recovering.
Mire areas with unusual structure were found and studied in the south-east of West Siberia. They are
represented by a series of parallel ribbons in river valleys; the central parts of the mires are formed by complexes
of mesotrophic pools with Carex species and forested peat beds. The mire areas are characterized by higher
species diversity and by presence of rare and endangered species. Description is given.
Ecological-phytocoenotic position of annual halophytic Suaeda in the south-east of the West Siberian Plain was analyzed. The place of plant communities dominant by Suaeda species in Braun-Blanquet classification was
determined. Five associations and two communities were characterized. New association Suaedetum kulundensis and community of Suaeda tuvinica were described.
Individual morphogenesis and ontogenetc structure of coenopopulations were studied; current status of Bupleurum scorzonerifolium coenopopulations in Buryatia was assessed by a complex of characters.
Biomorphological structure of Baikalo-Lensky State Nature Reserve flora and its separate floristic complexes was analyzed by means of K. Raunkier’s and I.G. Serebryakov’s approaches. Some biomorphs reflecting
extreme climatic conditions, as well as some ecobiomorphs reflecting edaphotopic conditions of the leading floristic complexes were considered.
Cell structure of the leaf blade mesophyll was studied in 4 species of grasses of the genus Festuca (F. gigantea, F. pratensis, F. pseudovina and F. valesiaca) distributed in different natural and climatic conditions of Siberia. The
main shapes of cell chlorenchyma were identified. General and distinguishing features of spatial organization of assimilatory tissue of the leaves were revealed and characterized in Festuca species under study.
The results of study of flavonoid content and composition of Bistorta officinalis Delabre from natural habitats in Siberia are given. Plants growing in the conditions of increased insolation at a height of 1500–2000 m and
higher contain more flavonoids than plants of meadow communities in the plain, which indirectly confirms their protective function. A range of variations of the flavonoid content in mass flowering period amounts to 1.13–5.61 % (in flowers) and 0.69–5.10 % (in leaves). Flavonol aglycons were studied by HPLC methods in the plants collected in the Altai.
Algae were studied in the eutrophic peat bog (Plesetsk Region, Arkhangelsk Oblast). One hundred sixteen
species represented by 120 specific and intraspecific algal taxa were identified. The division Chlorophyta
prevailed. Spectra of life forms, ecological groups and morphotypes of algae were determined. Both typically
edaphophilous and hydrophilous species (history of the biotope) take part in formation of soil flora of the bog.
Sixteen species of maple are promising for introduction in Siberia. The diversity of forms was studied.
Literature and Russian and foreign web-based information on woody plants were analyzed. Four hundred and fifty four subspecies,
variants and forms of interest as ornamentals were identified for 12 species. Biological, ornamental and ecological characteristics of them and figures are given.
