E. V. Novichonok^*, N. A. Galibina, K. M. Nikerova

Institute of Forest KarRC RAS

Pushkinskaya st. 11, Petrozavodsk, Republic of Karelia, 185910, Russia

*E-mail: enovichonok@inbox.ru

Received: 24.09.2024

Revised: 17.02.2025

Accepted: 14.03.2025

Monitoring the biomass and productivity of woody plants is one of the highest priorities in forest ecology due to their role in the global carbon balance. We evaluated annual needle production, distribution of needle biomass by age, and nitrogen and carbon content in needles of Pinus sylvestris trees growing in pine stands of different ages and in different forest conditions. The highest values of annual needle production of the dominant element were observed in 180-190-year-old bilberry pine forests on sandy and sandy loam podzols. The dominant element in clearcuts had a significantly lower annual production, amounting to 11.5%, compared to 40-50-, 80-100-, and 180-190-year-old stands. The proportion of needle biomass of different ages in total needle biomass per tree differed between young trees on clearcuts (up to 10 years old) and trees of greater age (40-50-, 80-100- and 180-190-year-old trees). In young trees at the clearcut, almost 90% of the needle mass comes from annual and current-year needles, whereas in older trees, it’s around 50%. These data should be considered when building models of gas exchange and carbon fluxes in stands of different ages due to the dependence of photosynthesis rate on the age of needles. The carbon content of needles increased with increasing tree age. The discussion focuses on the significance of accurately estimating carbon content in biomass to improve the estimation of carbon stocks in phytocenosis.

 Кeywords: Scots pine, nitrogen, carbon, needle biomass fraction, forest conditions, pine forests of different ages

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]]> https://jfsi.ru/en/8-1-2025-chertov/ Fri, 18 Apr 2025 07:53:06 +0000 https://jfsi.ru/?p=7378

O. G. Chertov

Isaev Centre for Forest Ecology and Productivity of the RAS

Profsoyuznaya st. 84/32 bldg. 14, Moscow, 117997, Russia

E-mail: ochertov@rambler.ru

Received: 10.02.2025

Revised: 20.03.2025

Accepted: 14.03.2025

The leading role of the «living matter of the biosphere» according to V. I. Vernadsky as a biological factor of soil formation, which leads to the accumulation of soil organic matter (SOM), is emphasized. SOM is the main solid-phase product of the influence of plants and soil biota in the process of soil formation. The unsatisfactory reflection of the SOM attributes in the existing soil classifications is noted. A structural change in the taxon names in the Russian soil classification is proposed, taking into account the types of SOM transformation. The concept and taxonomy of humus forms are proposed as a basic type of SOM transformation. This format of taxon names has been successfully used in soil mapping in forest inventory and in the forest typological researches. Such a taxonomy expands the information content and gives dynamism to the soil classification, which is especially important in conditions of increasing anthropogenic stress and a rapidly changing natural environment.

 Keywords: biosphere, biological factor of soil formation, SOM, soil classification, types of SOM transformation, classification taxon format

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]]> https://jfsi.ru/en/8-1-2025-soukhovolsky/ Fri, 11 Apr 2025 07:50:48 +0000 https://jfsi.ru/?p=7294

A. G. Soukhovolsky^1*, A. V. Kovalev², O. V. Tarasova³, E. P. Chertkova⁴, D. G. Zamolodchikov⁴

¹V. N. Sukachev Institute of Forest SB RAS

Akademgorodok 50/28, Krasnoyarsk, 660036, Russia

²Krasnoyarsk Scientific Center SB RAS, Akademgorodok 50, Krasnoyarsk, 660036, Russia

³Siberian Federal University, av. Svobodny, 79, Krasnoyarsk, 660041, Russia

⁴ Isaev Centre for Forest Ecology and Productivity of the RAS

Profsoyuznaya st. 84/32 bldg. 14, Moscow, 117997, Russia

^*E-mail: soukhovolsky@yandex.ru

Received: 02.01.2025

Revised: 06.02.2025

Accepted: 14.03.2025

The possibilities of quantitative assessment of aesthetic services of natural landscape in forests and parks are considered. An attempt to «weigh» the quality of aesthetic services and aesthetic properties of different landscapes is discussed. It is assumed that aesthetic characteristics of forest areas and parks are formed in the same ways as the characteristics of painting, and especially landscape painting. In this regard, objects of landscape painting are considered from an artistic point of view and for their quantitative assessment the possibility of quantitative assessment of paintings by famous artists is considered. To describe the color and brightness of works of art as a set of pixels of different colors and brightness, it is proposed to consider rank distributions by the color and brightness of these objects. It is shown that paintings of outstanding artists are characterized by rank distributions in the form of the Zipf-Pareto and Mandelbrot equations. By analogy with works of art, photographs of landscapes in the Altai Nature Reserve are considered. It is shown that all landscapes can be classified by the characteristics of the Zipf-Pareto rank distributions. The proposed approach allows one to approach the assessment of the aesthetic characteristics of landscapes.

Keywords: forests, parks, photographs, landscape, aesthetic characteristics, painting, color, brightness, pixels, rank distribution

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A. V. Lebedev^1,2*, N. V. Ivanova³, D. Yu. Gosteva¹, V. V. Gostev¹, I. G. Krinitsyn^2,4, M. P. Shashkov⁵

¹Russian State Agrarian University – Moscow Timiryazev Agricultural Academy

Russia, 12742 Moscow, Timiryazevskaya, 49

²Kologrivsky Forest State Nature Reserve

Russia, 157440 Kostroma region, Kologriv, Nekrasova st., 48

³Institute of Mathematical Problems of Biology, Branch of Keldysh Institute of Applied Mathematics, Russian Academy of Sciences

Russia, 142290 Moscow region, Pushchino, Prof. Vitkevich st., 1

⁴Center for International Cooperation of the Ministry

of Education of the Russian Federation

 Russia, 115093 Moscow, Bolshaya Serpukhovskaya st., 25, 14 

⁵Karaganda Buketov University

Kazakhstan, 100024 Karaganda, Universitetskaya st., 28

*E-mail: avl1993@mail.ru 

Received: 22.12.2024

Revised: 04.02.2025

Accepted: 14.03.2025

Catastrophic windthrows lead to dramatic damages in the structure of forest stands, the consequences of which are complex and long-term in scope. The aim of the study was to assess changes in carbon stocks of deadwood and the structure of even-aged and uneven-aged old-growth forest stands in the Kologrivsky Forest Nature Reserve after the storm of 2021 using ground-based data. A total of 15 sample plots were established on areas of different wind damages in the Kologrivsky cluster of the Reserve in July 2022 to evaluate the storm impact on forest stands. A visual forest inventory was carried out to estimate the growing part of the stand that survived the catastrophic impact. The fallen fraction of the stand was studied on transects in the same sample plots. The trunk diameter of each deadwood trunk was measured, the species was identified, and the decomposition stage was assessed during this survey. Three different ways for the deadwood carbon stock evaluation on transects were used. These methods were based on the basic wood density at different stages of decomposition and how the carbon content in deadwood changes with its volume. The greatest diversity of decomposition stages and tree species diversity in the deadwood were found in mixed linden-spruce stands. Trunks of the first decomposition stage were dominated in structure of deadwood in the even-aged fir-spruce, spruce, birch, and aspen stands, while the fraction of other stages was relatively low. Birch and aspen showed the highest resistance to storm winds, while spruce was less resistant. The proportion of windfall spruce deadwood was 79%, and birch and aspen were 34% of the stock on average before the windthrow. The largest carbon stock in deadwood was found in pure and near-pure even-aged mature and overmature spruce stands in the Sekha and Ponga river basins, reaching 65.3–68.8 tonnes C per ha in some areas.

Keywords: successions, southern taiga, uneven-aged and even-aged forest stands, stages of deadwood decomposition

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P. N. Shulpina¹, O. P. Bazhenova¹, V. V. Kaganov²  

¹ Omsk State Agrarian University named after P. A. Stolypin, Russia, 644008 Omsk, Institutskaya Square, 1 

² Isaev Centre for Forest Ecology and Productivity of the Russian Academy of Sciences, Russia, 117997 Moscow, st. Profsoyuznaya, 84/32 

E-mail: gjkbyrf1008@mail.ru 

Received: 30.09.2024

Revised: 05.02.2025

Accepted: 18.02.2025

Relevance and objectives. Modern climate change attracts close attention to the study of climate-regulating functions of forest ecosystems. Of particular importance in this regard are coniferous forests, which are widespread in our country and form a significant share (up to 80%) of forest plantations. For the first time in the conditions of the Omsk region, carbon reserves in Siberian larch stands growing on the territory of the carbon polygon (Omsk) and forest fund lands were studied. The purpose of the work is a comparative assessment of carbon reserves in the pools of phytomass of the stand, forest litter and soil organic matter in Siberian larch stands (Larix sibirica Ledebur) growing in different areas of the southern forest-steppe of the Omsk region. Materials and methods. The article is based on the research materials conducted in 2022–2023 on the territory of larch stands in various areas of the southern forest-steppe of the Omsk region – at the carbon testing ground of Omsk State Agrarian University (Omsk) and near the village of Kordon. Two test plots were laid out on each site. Carbon stocks in the pools under consideration were calculated according to the Methodological Guidelines for the Quantitative Determination of the Volume of Greenhouse Gas Absorption from 2017. Results. The average long-term and current climatic parameters in the study areas did not differ significantly. The age of the forest stands is 63–70 years. The key factor in the difference in growing conditions between the objects under consideration was the difference in soil type. On the territory of the carbon testing site, the soil is meadow-chernozem, shallow, low-humus, heavy loamy, while near the village of Kordon it is gray forest solodized, shallow, heavy loamy. Differences in soil types determined the difference in the taxation parameters of the larch stands and the difference in carbon reserves in the pools of phytomass and soil organic matter. Carbon reserves in the phytomass of forest stands varied from 47.3 t C ha^-1 to 100.6 t C ha^-1. The organic carbon reserve in the 0–50 cm layer on the territory of the testing site was 122.2 t C ha^-1, while in the soils near the village of Kordon it was 118.8 t C ha^-1. Kordon – 108.1 t C ha^-1. Conclusion. The revealed differences in the taxation indices of even-aged larch stands and carbon reserves in the pools of stand and soil phytomass are mainly due to differences in soil types. The stock of stem wood in larch stands near the village of Kordon on gray forest soil is significantly higher than on meadow-chernozem soil of the Omsk State Agrarian University testing ground. Higher reserves of soil carbon in the 0–50 cm layer, on the contrary, are characteristic of the testing ground territory.

Keywords: larch stands, carbon reserves, phytomass, litter, soil, Omsk region

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