Distribution and dynamics of the drying areas of pine stands according to forest taxonomic indicators in the Drevlianskyi Nature Reserve

Authors

DOI:

https://doi.org/10.33730/2310-4678.1.2025.328369

Keywords:

infestation, phytosanitary condition, forest monitoring, phytopathological process, biotechnical measures

Abstract

The article presents the results of the distribution and dynamics of changes in the area of pine forest dieback centers in the Drevlianskyi Nature Reserve for the years 2017-2024 based on satellite data. In 2017, the total area of dieback centers was 553.54 ha, and by 2024, it increased by 431.22 ha (77.90%), reaching 984.76 ha. Among the nature conservation research departments (hereinafter referred to as NDRD), the largest area is occupied by the Narodytske department, where the area of dead trees increased by 250.82 ha (92.64%) — from 270.76 ha (48.91%) to 521.58 ha (52.97%). However, due to the fire in 2020 in the Motiikivskyi NDRD, the area of dieback centers decreased by 73.85 ha (61.38%) — from 120.31 ha (21.73%) to 46.46 ha (4.72%), as the fire almost completely destroyed the department’s territory. By the origin of the forest stand, the largest area of dieback centers is occupied by naturally-originated forests, where from 2017 to 2024, the area increased by 178.76 ha, or 56.80% — from 314.17 ha to 492.63 ha, which constitutes 50.03% of the total area of dieback centers. A significant area is occupied by pure pine forests (with a pine share of 10 units), where during the study period, the area increased from 440.99 ha (79.67%) to 613.25 ha (62.27%). Among the bonitet classes, the largest area is occupied by the I class, increasing from 209.51 ha (37.85%) to 429.33 ha (43.60%). The dieback process is influenced by the forest stand density. In stands with a density of 0.80, the dieback area increased by 164.54 ha, or 72.20% — from 227.89 ha to 392.43 ha. By age structure, the largest area is occupied by middle-aged stands, where the area increased from 454.27 ha (82.07%) to 751.30 ha (76.29%) during the study period. Within this age group, the largest area is occupied by stands of the IX age class (from 125.17 ha, or 22.61%, to 224.79 ha, or 22.82%). In terms of dieback area distribution by typological structure, the largest area is occupied by the fresh oak-pine subir (B2-dS), where the area increased by 171.20 ha (86.60%) — from 197.70 ha to 368.90 ha in 2017-2024. At the beginning of the pine forest dieback process, the largest area was occupied by fresh birch forest (A2-C) — 260.40 ha (47.04%), which increased to 336.80 ha, or by 34.20%. Such a significant change in area was influenced by the 2020 fire, which caused the greatest damage to deadwood sections in the A2-C conditions. Future research prospects involve monitoring the phytosanitary condition of forests, particularly pine forests, to study the changes in the area of dieback centers for planning biotechnical measures aimed at improving the ecological situation in the research region.

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Published

2025-02-24

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No. 1 (2025)

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