Reconstruction of Stand History and Impact Evaluation of an Invasive Bark Beetle in Siberian Fir Forests with the Help of Spatial Structure Analysis = Реконструкция истории древостоев и оценка воздействия инвазивного короеда в пихтовых лесах с помощью анализа пространственной структурыReconstruction of Stand History and Impact Evaluation of an Invasive Bark Beetle in Siberian Fir Forests with the Help of Spatial Structure Analysis = Реконструкция истории древостоев и оценка воздействия инвазивного короеда в пихтовых лесах с помощью анализа пространственной структуры The most devastating insect invasion of forest ecosystems in Russia is the recent mass reproduction of the four-eyed fir bark beetle (Polygraphus proximus Blandf.) in southern Siberian fir (Abies sibirica Ledeb.) forests. The objective of our research was to study the spatial
structure of fir forests and their change under the impact of the four-eyed fir bark beetle in its
secondary (invasive) distribution range. We selected two fir stands located near the villages
of Itatka and Malinovka in the Tomsk region. Both stands represent natural ripe succession
forests on sites that previously experienced logging activities, which were triggered by settlement activities in the second half of the nineteenth century. We used Field-Map technology
for gathering non-spatial and spatial stand data. The analysis showed that height, diameter and
radial increment of fir trees, killed or severely weakened by attacks of the four-eyed fir bark
beetle, were significantly lower than that of healthy individuals. The social status of fir trees,
seriously attacked or already killed by Polygraphus proximus was indicated by the Ui index as
moderately suppressed. In contrast to the distribution pattern of living firs, the pattern of dead
or severally weakened firs killed by the four-eyed fir bark beetle was significantly clumped
over short distances (sample plots (SP) Itatka and Malinovka). This finding coincides with
visual observations in other stands, that dead trees are grouped to some extent. However, the
hypothesis of spatial independence of the tree positions of living and dead firs was accepted
for both plots.
Funding: The research was funded by the Russian Foundation for Basic Research and the
government of Tomsk region, grant No. 16-44-700782, and carried out as part of a state assignment of the Center for Forest Ecology and Productivity of the Russian Academy of Sciences
(No. АААА-А18-118052400130-7).
For citation: Debkov N.M., Gradel A., Aleinikov A.A. Reconstruction of Stand History and
Impact Evaluation of an Invasive Bark Beetle in Siberian Fir Forests with the Help of Spatial
Structure Analysis. Lesnoy Zhurnal [Russian Forestry Journal], 2020, no. 3, pp. 24–41. DOI:
10.37482/0536-1036-2020-3-24-41 Итого: 0.00руб. Электронное издание «Reconstruction of Stand History and Impact Evaluation of an Invasive Bark Beetle in Siberian Fir Forests with the Help of Spatial Structure Analysis = Реконструкция истории древостоев и оценка воздействия инвазивного короеда в пихтовых лесах с помощью анализа пространственной структуры» (бесплатно). Скачать номера в формате PDF. |