Нематоди у деревині сосни звичайної в осередках короїдів Рівненської області
Introduction According to some research, the nematodes have contributed to the deterioration of the health condition of Scots pine stands in recent years by clogging the tracheids of early wood. Entomophilic, phytophagous, saproxylic, and associated with fungi nematode species were found in drying S...
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| Date: | 2021 |
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| Main Author: | |
| Format: | Article |
| Language: | Ukrainian |
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Ukrainian Research Institute of Forestry and Forest Melioration named after G. M. Vysotsky (URIFFM)
2021
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| Online Access: | https://forestry-forestmelioration.org.ua/index.php/journal/article/view/327 |
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| Journal Title: | Forestry and Forest Melioration |
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Forestry and Forest Melioration| _version_ | 1856543451640758272 |
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| author | Andreieva, O. Yu. |
| author_facet | Andreieva, O. Yu. |
| author_sort | Andreieva, O. Yu. |
| baseUrl_str | |
| collection | OJS |
| datestamp_date | 2022-06-08T11:10:00Z |
| description | Introduction
According to some research, the nematodes have contributed to the deterioration of the health condition of Scots pine stands in recent years by clogging the tracheids of early wood. Entomophilic, phytophagous, saproxylic, and associated with fungi nematode species were found in drying Scots pine trees in Polissia in previous years. Since the phytophagous nematode was found only in drying trees in bark beetle foci, it cannot be argued that it was the nematodes that caused the weakening of those trees.
The aim of the research was to identify the species composition and distribution by ecological and trophic groups of nematodes isolated from the wood of Scots pine trees in the bark beetles' foci.
Materials and Methods
The study was carried out in Krichilske forestry of the Sarny State Forest Enterprise. Wood samples to determine the species composition, distribution, and density of nematode populations were taken from model trees - 3 trees of the 3rd and 6th categories of health condition from two sample plots, 12 model trees in total. Nematodes were isolated from wood samples in the laboratory using the Baermann method. The nematodes were identified by morphometric characteristics. The frequency of occurrence of nematode species was evaluated as the proportion of samples with the presence of particular species from all examined samples.
Results and Conclusions
In 55 % of the wood samples of Scots pine trees, 16 species of nematodes from 12 genera, 10 subfamilies, 9 families, 6 superfamilies, 4 suborders, and 3 orders were identified. No significant differences in the nematode species composition in the samples from dry poor and relatively poor fresh forest site conditions were found. The frequency of occurrence of nematodes in the trees of the 6th category of health condition is significantly higher than in those of the 3rd category. By population density in 100 g of wood, saproxylic, phytophagous, entomophilic, and associated with fungi nematode species were 53; 24.7; 12 and 10.3%, respectively. B. mucronatus was found in the stem part with transitional bark, B. chitwoodi with thin bark, B. eggersi with thin and thick bark, and entomohelminths with thick bark. |
| first_indexed | 2026-02-08T08:03:26Z |
| format | Article |
| id | oai:ojs2.forestry-forestmelioration.org.ua:article-327 |
| institution | Forestry and Forest Melioration |
| language | Ukrainian |
| last_indexed | 2026-02-08T08:03:26Z |
| publishDate | 2021 |
| 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-3272022-06-08T11:10:00Z Nematodes in the Scots pine wood in the bark beetles foci within Rivne region Нематоди у деревині сосни звичайної в осередках короїдів Рівненської області Andreieva, O. Yu. type of forest site conditions, tree health condition, ecological and trophic structure. тип лісорослинних умов, санітарний стан дерев, еколого-трофічна структура. Introduction According to some research, the nematodes have contributed to the deterioration of the health condition of Scots pine stands in recent years by clogging the tracheids of early wood. Entomophilic, phytophagous, saproxylic, and associated with fungi nematode species were found in drying Scots pine trees in Polissia in previous years. Since the phytophagous nematode was found only in drying trees in bark beetle foci, it cannot be argued that it was the nematodes that caused the weakening of those trees. The aim of the research was to identify the species composition and distribution by ecological and trophic groups of nematodes isolated from the wood of Scots pine trees in the bark beetles' foci. Materials and Methods The study was carried out in Krichilske forestry of the Sarny State Forest Enterprise. Wood samples to determine the species composition, distribution, and density of nematode populations were taken from model trees - 3 trees of the 3rd and 6th categories of health condition from two sample plots, 12 model trees in total. Nematodes were isolated from wood samples in the laboratory using the Baermann method. The nematodes were identified by morphometric characteristics. The frequency of occurrence of nematode species was evaluated as the proportion of samples with the presence of particular species from all examined samples. Results and Conclusions In 55 % of the wood samples of Scots pine trees, 16 species of nematodes from 12 genera, 10 subfamilies, 9 families, 6 superfamilies, 4 suborders, and 3 orders were identified. No significant differences in the nematode species composition in the samples from dry poor and relatively poor fresh forest site conditions were found. The frequency of occurrence of nematodes in the trees of the 6th category of health condition is significantly higher than in those of the 3rd category. By population density in 100 g of wood, saproxylic, phytophagous, entomophilic, and associated with fungi nematode species were 53; 24.7; 12 and 10.3%, respectively. B. mucronatus was found in the stem part with transitional bark, B. chitwoodi with thin bark, B. eggersi with thin and thick bark, and entomohelminths with thick bark. Метою досліджень було визначення видового складу та розподілу за еколого-трофічними групами нематод, виділених із деревини дерев сосни звичайної в осередках короїдів. У 55 % зразків деревини дерев сосни звичайної визначено 16 видів нематод із 12 родів 10 підродин 9 родин 6 надродин 4 підрядів 3 рядів. Значущих відмінностей видового складу нематод у зразках із типів лісорослинних умов А1 і В2 не виявлено. Заселеність нематодами дерев VI категорії санітарного стану була достовірно більшою, ніж дерев ІІІ категорії. За щільністю в 100 г деревини сапроксилобіонти (сапроксильні), фітогельмінти (фітофаги), ентомогельмінти (ентомофільні) й мікоксилобіонти (пов’язані з грибами) становили 53; 24,7; 12 і 10,3 % відповідно. B. mucronatus виявлено на ділянках стовбура з перехідною корою, B. chitwoodi – з тонкою корою, B. eggersi – з тонкою та грубою корою, а ентомогельмінтів – лише на ділянках із грубою корою. Ukrainian Research Institute of Forestry and Forest Melioration named after G. M. Vysotsky (URIFFM) 2021-12-23 Article Article application/pdf https://forestry-forestmelioration.org.ua/index.php/journal/article/view/327 10.33220/1026-3365.139.2021.132 Forestry and Forest Melioration; No. 139 (2021): Forestry and Forest Melioration; 132-138 Лісівництво і Агролісомеліорація; № 139 (2021): Лісівництво і Агролісомеліорація; 132-138 2663-4147 1026-3365 10.33220/1026-3365.139.2021 uk https://forestry-forestmelioration.org.ua/index.php/journal/article/view/327/301 http://creativecommons.org/licenses/by/4.0 |
| spellingShingle | тип лісорослинних умов санітарний стан дерев еколого-трофічна структура. Andreieva, O. Yu. Нематоди у деревині сосни звичайної в осередках короїдів Рівненської області |
| title | Нематоди у деревині сосни звичайної в осередках короїдів Рівненської області |
| title_alt | Nematodes in the Scots pine wood in the bark beetles foci within Rivne region |
| title_full | Нематоди у деревині сосни звичайної в осередках короїдів Рівненської області |
| title_fullStr | Нематоди у деревині сосни звичайної в осередках короїдів Рівненської області |
| title_full_unstemmed | Нематоди у деревині сосни звичайної в осередках короїдів Рівненської області |
| title_short | Нематоди у деревині сосни звичайної в осередках короїдів Рівненської області |
| title_sort | нематоди у деревині сосни звичайної в осередках короїдів рівненської області |
| topic | тип лісорослинних умов санітарний стан дерев еколого-трофічна структура. |
| topic_facet | type of forest site conditions tree health condition ecological and trophic structure. тип лісорослинних умов санітарний стан дерев еколого-трофічна структура. |
| url | https://forestry-forestmelioration.org.ua/index.php/journal/article/view/327 |
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