Home – Home – Jornals – Siberian Journal of Forest Science 2022 number 5

In a comparative vein, the existing and potentially possible methodological methods for delimiting zonal-provincial associations of forest-bog and peat-bog complexes are analyzed. It is shown that on geomorphological differences of locations under conditions of continuous interaction with climate elements, soils and vegetation, their relatively autonomous development in time and space is carried out. On the example of the northern part of the Ob and Tom interfluve, in accordance with the criteria of such relative autonomy, natural indicator variations in the taxation and phytocenotic structure of indigenous marsh forests and, for comparison, dry valley pine forests are characterized. In the ranks of their modern typological and morphosculptural organization, causal relationships of ecosystem diversity and productivity with water and mineral growing conditions are considered, which clearly affect the composition of the age generations of the «mother» forest stands, undersized undergrowth and juvenile renewal groups. On the basis of the dimensions of the positive elements of the phytogenic micro- and mesorelief, large-hillock and cushion-like surfaces of oligotrophic and mesotrophic pine forests with mossy-lichen-shrub vegetation are typified, in peat deposits of which permafrost aquicludes and ice lenses-migratory are regularly localized. In especially moistened eutrophic pine forests with grass-mossy and low-grass vegetation, the phytogenic relief is considered in the system of different-height, scattered and merged tussocks, as well as near-stem mounds, which are formed by frameworks of skeletal roots draped with coniferous-leaf litter, grass rags, green Bryidae Engl. and hypnum Hypnales W. R. Buck et Vitt tows mosses. Taking into account these and a number of other factors, the trend of ambiguous settlement of self-sowing and pine Pinus L. undergrowth under the canopy of «mother» forest stands is estimated. Phytocenotic and inventory indication of pine forests, based on the system-sampling method of assessment, expands the understanding of the comparative range of variability in the structure of both marsh and upland pine forests that have reached the climax or approached the stages of self-development.

Here we analyzed the data on the burning of the territory of the national park «Krasnoyarsk Stolby» annually recorded in the protected area and the buffer zone as part of long-term observations of natural processes. Information on fires was summarized starting from 1942 onwards and converted into the ArcGis database. A digital model of the fire history in the national park has been obtained, which includes 176 fire sites (610 tax. divisions), 40 (58 tax. divisions) of which are known by repeated fires. A retrospective analysis of the actual burning of forests in this territory for the period from 1942 to 2020 was carried out. The frequency of fires and burnout areas differ significantly for different functional zones of the national park, depending on the protection regime. The most frequently combustible (2.4 events per year) are sites with a recreational use regime, where the interval between fires not exceeding 2 years. The largest burned sites were in the strict strictly protected zone in 1956 and 2002. Ground fires of low and medium intensity became predominant over the entire period. In terms of area coverage, the most extensive fires occurred in the period from 1997 to 2006 with 1744 hectares covered by fires, including repeated fires in the same areas in different years. The joint analysis of the maps of the burning of the territory and the data on forest types showed that most fires for all considered period took place in stands where the dominant species was Scots pine Рinus sylvestris L. (59 %). The strictly protected zone of the national park is the least protected from major fires in the future, due to the high class of natural fire hazard in recent years because of the massive drying up of conifer stands (mainly fir) and a high degree of accumulation of forest fuel due to the long absence of fires in the protected area as a whole.

The results of long-term studies of taxonomic diversity and ecological and trophic features of the mycobiota of urban birch forests of Krasnoyarsk, which are subjected to an average degree of recreational load, are presented. 234 species of macromycetes have been identified, of which only less than half are found regularly, most of them are detected rarely or singly. The main part of the mycobiota, rich in single-species taxa, is made up of fungi of the order Agaricales Underw.; in terms of the number of species in the family spectrum, the families Russulaceae Lotsy, Agaricaceae Chevall., and Inocybaceae Jülich. are the leaders. The generic spectrum is dominated by Russula Pers., Inocybe (Fr.) Fr. and Mycena (Pers.) Roussel. The ecological and trophic structure of the mycobiota is dominated by xylotrophs, mycorrhiza formers, and humus saprotrophs. Widely specialized xylosaprotrophs predominate over xyloparasites, which are rarely found on living trees. Among the mycorrhiza-forming species, the proportion of representatives of the Russulaceae and Inocybaceae families is high. Among the humus saprotrophs, there are species characteristic of both forests and open habitats. The presence of a large number of synanthropic species in the dominant taxonomic and ecological-trophic groups of macromycetes indicates a pronounced impact of recreational pressure on the formation of mycobiota in urban forests. On the fallen birch, Hericium coralloides (Scop.) Pers, listed in the Red Data Book of Krasnoyarsk Krai, is regularly found. Several more rare species of fungi subject to protection were identified in the study area in previous years.

The woody and shrubby plants species composition and vital status at the territory of Krasnoyarsk Central Park were studied. The purpose of the work is to determine the tree and shrub species composition at the territory of the Central Park, to assess their vital status, to study the arboriflora structure and biodiversity, to identify dominant and single species, to give recommendations for improving the species composition and plantings quality. The studies were carried out in August 2021. The assessment of the species diversity, vital and sanitary condition of the park’s tree and shrub vegetation was carried out by the method of a complete enumeration of trees. The planting vital index determination was carried out using the generally accepted method of visual assessment of tree and shrub vegetation. It has been established that the Central Park arboriflora is represented by 86 species of plants, including: 39 species of trees, 46 species of shrubs and 1 species of vines. Arboriflora consists of 4470 plant (4133 trees, 337 shrubs), growing in the alley cropping, group planting, solitaires, boskets (total length 582 m) as well as hedge grow (50 m). The plantings vitality index is 1.99, which corresponds to a weakened or slightly damaged stands. The arboriflora structure was determined, its features were identified. The species that make the main contribution were identified. The most stable and weakened species of the park’s arboriflora were identified. Recommendations to stand developing of Krasnoyarsk Central Park were formulated based on the obtained results. It is advisable to apply park reconstruction proposals for urban spaces landscaping in similar environmental conditions.

Fossil wood that is ca 7 million years old from Bükkábrány (Hungary) was analyzed by thermogravimetry (TG), differential scanning calorimetry (DSC) and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) to evaluate alterations of its chemical composition. A wood sample of bald cypress ( Taxodium distichum (L.) Rich.) from West Hungary was taken as a reference. The fossil wood was characterized by higher contents of total carbon (58.05 %) and total nitrogen (0.44 %) compared to recent wood. TG of fossil wood showed a high heterogeneity of wood substance, significant loss of polysaccharides and enrichment by lignin including more thermally stable components (> 500 °C). The enthalpy change (∆H) of combustion (thermo-oxidation) for fossil wood was significantly higher than for recent wood (-18.17 kJ/g vs. -11.41 kJ/g). Py-GC/MS analysis of fossil wood showed a significant depletion of polysaccharide pyrolysis products and an increase in lignin pyrolysis products compared to recent wood. The pyrolytic H/L ratio indicates a preferential loss of polysaccharides in fossil wood. Polysaccharide pyrolysis products were rare and represented mainly by levoglucosan. Lignin also underwent substantial changes. A dramatic decrease in monomers, an increase in short side chain compounds and the presence of demethylated/demethoxylated compounds in the composition of lignin pyrolysis products are indicative of lignin alteration (degradation). Moreover, a high abundance of styrene, cresols, phenol and phenolic compounds was observed.

The article analyzes the scientific achievements and heritage of Anatoly Platonovich Abaimov, a well-known dendrologist and forester, who have made a great contribution to the study of larch Larix Mill. species in Siberia and the Far East, larch forests in the permafrost zone, as well as the features and patterns of the forest formation process in them. Anatoly P. Abaimov has substantiated the quantitative and qualitative morphological signs to distinguish larches Gmelin ( Larix gmelinii (Rupr.) Kuzen.) and Cajander ( L. cajanderi Mayr), described their ecological specialization and clinal geographical variability of morphological features, proved an introgressive hybridization between these larch species. He characterized in detail the forestry and taxation specificity, ecological functions and dynamics of Siberian larch formations under the influence of natural and anthropogenic factors. Anatoly P. Abaimov has marked the beginning of long-term Russian-Japanese cooperation in the field of assessing the global role of the permafrost forest ecosystems in the emission and absorption of greenhouse gases. The public and pedagogical activity of Anatoly P. Abaimov is characterized. A list of scientific papers and a list of dissertations defended under his supervision are given.