Реакція радіального приросту сосни звичайної на низові пожежі в молодняках Житомирського Полісся
Introduction Forest fires pose a critical environmental threat, particularly to Scots pine (Pinus sylvestris L.) stands in the Polissia region of Ukraine. Since 2022, full-scale military aggression has drastically increased both the frequency of forest fires and the total burned area. Surface fires...
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| Date: | 2026 |
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| Format: | Article |
| Language: | Ukrainian |
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Ukrainian Research Institute of Forestry and Forest Melioration named after G. M. Vysotsky (URIFFM)
2026
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| Online Access: | https://forestry-forestmelioration.org.ua/index.php/journal/article/view/484 |
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| Journal Title: | Forestry and Forest Melioration |
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Forestry and Forest Melioration| _version_ | 1866573085711269888 |
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| author | Koval, I. M. Andreieva, O. Yu. Voron, V. P. Melnyk, Ye. Ye. Sydorenko, S. H. Volchenko, A. K. |
| author_facet | Koval, I. M. Andreieva, O. Yu. Voron, V. P. Melnyk, Ye. Ye. Sydorenko, S. H. Volchenko, A. K. |
| author_sort | Koval, I. M. |
| baseUrl_str | https://forestry-forestmelioration.org.ua/index.php/journal/oai |
| collection | OJS |
| datestamp_date | 2026-05-29T18:31:45Z |
| description | Introduction
Forest fires pose a critical environmental threat, particularly to Scots pine (Pinus sylvestris L.) stands in the Polissia region of Ukraine. Since 2022, full-scale military aggression has drastically increased both the frequency of forest fires and the total burned area. Surface fires cause cambium damage, reduce radial growth, and may lead to tree mortality. Dendrochronological analysis provides an effective tool for assessing the impact of fire on tree vitality. This study aimed to evaluate the response of radial growth in young Scots pine stands to a spring surface fire in Zhytomyr Polissia under current climatic conditions and military-induced pressures.
Materials and Methods
The study was conducted in a 30-year-old Scots pine stand under fresh relatively poor site conditions (B?) in Korostyshiv forestry, Zhytomyr region. A surface fire occurred in April 2022. Two temporary sample plots were established: an unburned control plot (TPP-1) and a burned plot (TPP-2). Mean tree height was 15.8 m on the burned plot and 14.7 m on the control plot, while mean diameter was 18.3 cm and 17.9 cm, respectively. Relative density of stocking was 0.3 on the burned plot following fire-induced mortality and sanitary felling, and 0.7 on the control plot. Fifteen increment cores per plot were collected at breast height (1.3 m) in September 2024 using a Pressler increment borer. Earlywood, latewood, and annual ring widths were measured with a precision of 0.001 mm. Cross-dating and chronology development followed standard dendrochronological procedures. Meteorological data from the Zhytomyr weather station for the period 1995–2024 were analysed using the hydrological year approach. Statistical analysis included descriptive statistics and polynomial regression analysis.
Results
In the fire year (2022), total radial growth on the burned plot decreased by 34% compared to the control plot (0.96 mm vs. 1.46 mm). Latewood width decreased by 28% (0.25 mm versus 0.35 mm), while earlywood width decreased by 27% (0.83 mm versus 1.13 mm). Hydrothermal conditions in 2022 were close to optimal, with precipitation exceeding the long-term average by 7% and air temperature by 0.6°C, which partially mitigated immediate fire stress. However, the severe drought of 2023 (precipitation deficit of 32% and air temperature 14% above the long-term average) prolonged the recovery period. By 2024, earlywood width on the burned plot exceeded that of the control plot by 23% (1.02 mm versus 0.78 mm). This increase was associated with a 57% reduction in stand density following sanitary fellings (from 0.7 to 0.3). Post-fire variability in radial growth increased substantially: earlywood variance on the burned plot reached 0.88 in 2024 compared to 0.22 on the control plot. In 1% of sampled trees, the annual ring for 2022 was absent. Regression analysis revealed significant relationships between radial increment and health condition (R2 = 0.44, ? = 0.66), as well as stem diameter (R2 = 0.69, ? = 0.83). Trees with larger diameters demonstrated greater fire resistance due to thicker bark and improved cambial protection.
Conclusions
The surface fire of April 2022 caused substantial physiological stress in the 30-year-old Scots pine stand, resulting in a 34% reduction in total radial growth during the fire year. Favourable moisture conditions in 2022 reduced the immediate impact of fire stress; however, the severe drought of 2023 prolonged the recovery process. By the second year after the fire, surviving trees exhibited increased earlywood growth, exceeding control values by 23%, due to reduced competition following a 57% reduction in stand density. Post-fire variability in annual ring width increased markedly, indicating considerable individual variation in fire response. Stem diameter and health condition were identified as statistically significant predictors of post-fire radial growth. Trees with larger diameters demonstrated greater resilience to fire. Overall, surviving trees on the burned plot successfully restored radial growth by the second year following the fire.
7 Figs., 3 Tables, 25 Refs. |
| doi_str_mv | 10.33220/1026-3365.148.2026.143 |
| first_indexed | 2026-05-30T01:00:11Z |
| format | Article |
| id | oai:ojs2.forestry-forestmelioration.org.ua:article-484 |
| institution | Forestry and Forest Melioration |
| keywords_txt_mv | keywords |
| language | Ukrainian |
| last_indexed | 2026-05-30T01:00:11Z |
| publishDate | 2026 |
| publisher | Ukrainian Research Institute of Forestry and Forest Melioration named after G. M. Vysotsky (URIFFM) |
| record_format | ojs |
| spelling | oai:ojs2.forestry-forestmelioration.org.ua:article-4842026-05-29T18:31:45Z Scots pine radial growth response to surface fire in young stands in Zhytomyr Polissia Реакція радіального приросту сосни звичайної на низові пожежі в молодняках Житомирського Полісся Koval, I. M. Andreieva, O. Yu. Voron, V. P. Melnyk, Ye. Ye. Sydorenko, S. H. Volchenko, A. K. dendrochronology Pinus sylvestris L. pyrogenic impact earlywood latewood annual wood stand health condition дендрохронологія Pinus sylvestris L. пірогенний вплив рання деревина пізня деревина річна деревина санітарний стан Introduction Forest fires pose a critical environmental threat, particularly to Scots pine (Pinus sylvestris L.) stands in the Polissia region of Ukraine. Since 2022, full-scale military aggression has drastically increased both the frequency of forest fires and the total burned area. Surface fires cause cambium damage, reduce radial growth, and may lead to tree mortality. Dendrochronological analysis provides an effective tool for assessing the impact of fire on tree vitality. This study aimed to evaluate the response of radial growth in young Scots pine stands to a spring surface fire in Zhytomyr Polissia under current climatic conditions and military-induced pressures. Materials and Methods The study was conducted in a 30-year-old Scots pine stand under fresh relatively poor site conditions (B?) in Korostyshiv forestry, Zhytomyr region. A surface fire occurred in April 2022. Two temporary sample plots were established: an unburned control plot (TPP-1) and a burned plot (TPP-2). Mean tree height was 15.8 m on the burned plot and 14.7 m on the control plot, while mean diameter was 18.3 cm and 17.9 cm, respectively. Relative density of stocking was 0.3 on the burned plot following fire-induced mortality and sanitary felling, and 0.7 on the control plot. Fifteen increment cores per plot were collected at breast height (1.3 m) in September 2024 using a Pressler increment borer. Earlywood, latewood, and annual ring widths were measured with a precision of 0.001 mm. Cross-dating and chronology development followed standard dendrochronological procedures. Meteorological data from the Zhytomyr weather station for the period 1995–2024 were analysed using the hydrological year approach. Statistical analysis included descriptive statistics and polynomial regression analysis. Results In the fire year (2022), total radial growth on the burned plot decreased by 34% compared to the control plot (0.96 mm vs. 1.46 mm). Latewood width decreased by 28% (0.25 mm versus 0.35 mm), while earlywood width decreased by 27% (0.83 mm versus 1.13 mm). Hydrothermal conditions in 2022 were close to optimal, with precipitation exceeding the long-term average by 7% and air temperature by 0.6°C, which partially mitigated immediate fire stress. However, the severe drought of 2023 (precipitation deficit of 32% and air temperature 14% above the long-term average) prolonged the recovery period. By 2024, earlywood width on the burned plot exceeded that of the control plot by 23% (1.02 mm versus 0.78 mm). This increase was associated with a 57% reduction in stand density following sanitary fellings (from 0.7 to 0.3). Post-fire variability in radial growth increased substantially: earlywood variance on the burned plot reached 0.88 in 2024 compared to 0.22 on the control plot. In 1% of sampled trees, the annual ring for 2022 was absent. Regression analysis revealed significant relationships between radial increment and health condition (R2 = 0.44, ? = 0.66), as well as stem diameter (R2 = 0.69, ? = 0.83). Trees with larger diameters demonstrated greater fire resistance due to thicker bark and improved cambial protection. Conclusions The surface fire of April 2022 caused substantial physiological stress in the 30-year-old Scots pine stand, resulting in a 34% reduction in total radial growth during the fire year. Favourable moisture conditions in 2022 reduced the immediate impact of fire stress; however, the severe drought of 2023 prolonged the recovery process. By the second year after the fire, surviving trees exhibited increased earlywood growth, exceeding control values by 23%, due to reduced competition following a 57% reduction in stand density. Post-fire variability in annual ring width increased markedly, indicating considerable individual variation in fire response. Stem diameter and health condition were identified as statistically significant predictors of post-fire radial growth. Trees with larger diameters demonstrated greater resilience to fire. Overall, surviving trees on the burned plot successfully restored radial growth by the second year following the fire. 7 Figs., 3 Tables, 25 Refs. Оцінено особливості реакції радіального приросту сосни звичайної (Pinus sylvestris L.) у 30-річних молодняках Житомирського Полісся на низову пожежу 2022 р. Дослідження проведено в умовах свіжого субору (В2) на пошкоджених вогнем і непошкоджених (контроль) соснових насадженнях. Керни деревини відібрано буравом Преслера. Ширину шарів ранньої, пізньої та річної деревини виміряно з точністю до 0,001 мм. Виявлено, що в рік пожежі річний радіальний приріст зменшився на 34 %, приріст ранньої деревини  – на 27 %, а пізньої – на 28 %. Посушливі умови 2023 р. посилили післяпожежний стрес і сповільнили відновлення стану дерев. На другий рік після пожежі зафіксовано збільшення приросту ранньої деревини внаслідок зменшення відносної повноти деревостану та покращення умов живлення дерев. Виявлено статистично значущий зв’язок між індексами приросту, діаметром дерев і категоріями їхнього санітарного стану. Дерева, які залишилися живими в пошкодженому низовою пожежею молодому сосняку, змогли відновити радіальний приріст на другий рік після пожежі. Ukrainian Research Institute of Forestry and Forest Melioration named after G. M. Vysotsky (URIFFM) 2026-05-29 Article Article application/pdf https://forestry-forestmelioration.org.ua/index.php/journal/article/view/484 10.33220/1026-3365.148.2026.143 Forestry and Forest Melioration; No. 148 (2026): Forestry and Forest Melioration; 143-153 Лісівництво і Агролісомеліорація; № 148 (2026): Лісівництво і Агролісомеліорація; 143-153 2663-4147 1026-3365 10.33220/1026-3365.148.2026 uk https://forestry-forestmelioration.org.ua/index.php/journal/article/view/484/437 http://creativecommons.org/licenses/by/4.0 |
| spellingShingle | дендрохронологія Pinus sylvestris L. пірогенний вплив рання деревина пізня деревина річна деревина санітарний стан Koval, I. M. Andreieva, O. Yu. Voron, V. P. Melnyk, Ye. Ye. Sydorenko, S. H. Volchenko, A. K. Реакція радіального приросту сосни звичайної на низові пожежі в молодняках Житомирського Полісся |
| title | Реакція радіального приросту сосни звичайної на низові пожежі в молодняках Житомирського Полісся |
| title_alt | Scots pine radial growth response to surface fire in young stands in Zhytomyr Polissia |
| title_full | Реакція радіального приросту сосни звичайної на низові пожежі в молодняках Житомирського Полісся |
| title_fullStr | Реакція радіального приросту сосни звичайної на низові пожежі в молодняках Житомирського Полісся |
| title_full_unstemmed | Реакція радіального приросту сосни звичайної на низові пожежі в молодняках Житомирського Полісся |
| title_short | Реакція радіального приросту сосни звичайної на низові пожежі в молодняках Житомирського Полісся |
| title_sort | реакція радіального приросту сосни звичайної на низові пожежі в молодняках житомирського полісся |
| topic | дендрохронологія Pinus sylvestris L. пірогенний вплив рання деревина пізня деревина річна деревина санітарний стан |
| topic_facet | dendrochronology Pinus sylvestris L. pyrogenic impact earlywood latewood annual wood stand health condition дендрохронологія Pinus sylvestris L. пірогенний вплив рання деревина пізня деревина річна деревина санітарний стан |
| url | https://forestry-forestmelioration.org.ua/index.php/journal/article/view/484 |
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