Article
Forestry
Giorgi Kozhoridze, Nataliya Korolyova, Rastislav Jakus
Summary: Forest pest infestation is a significant cause of tree mortality and woodland loss. This study used remotely sensed climate and ecological data to analyze the susceptibility of Norway spruce forests to bark beetle outbreak. The research found that the surface temperature of stands subsequently attacked by beetles was higher than intact stands in the year prior. Furthermore, the study linked above-average tree mortality to summer warming, winter temperature declines, and windstorms. The use of remotely sensed temperature data can help predict landscape-scale susceptibility to bark beetle outbreak and improve forest disturbance management.
FOREST ECOLOGY AND MANAGEMENT
(2023)
Article
Forestry
Agnieszka Kaminska, Maciej Lisiewicz, Bartlomiej Kraszewski, Krzysztof Sterenczak
Summary: The spruce bark beetle infestation in the Polish part of the Bialowieza Forest is considered the largest in history, nearly eliminating Norway spruce as a major forest tree species. Host and environmental factors influenced the timing of spruce mortality, with the dynamics varying across the study area under the unprecedented outbreak of I. typographus.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Forestry
Cihan Cilbircioglu, Marta Kovac, Milan Pernek
Summary: Research in the Black Sea Mountains of Turkey found 9 different species of phoretic mites on bark beetles collected from dead wood and tree bark of Black Pine, Scotch Pine, and Norway Spruce. These mites, including Dendrolaelaps quadrisetus and Proctolaelaps hystricoides, were identified for the first time within the Turkish fauna.
Article
Forestry
Jiri Korecky, Jaroslav Cepl, Nataliya Korolyova, Jan Stejskal, Marek Turcani, Rastislav Jakus
Summary: This study identified genetic markers associated with higher resistance to bark beetle infestation in Norway Spruce. The researchers found that a small proportion of mature trees were able to survive severe bark beetle outbreaks, suggesting a genetic basis for resilience. By analyzing genomic data, they identified 12 markers significantly associated with tree survival. These findings may aid in identifying trees with higher resistance to bark beetle infestation.
Article
Forestry
Maarten de Groot, Nikica Ogris
Summary: This study developed a predictive model for the sanitary felling of Norway spruce due to bark beetles. The model identified various factors that are correlated with sanitary felling and can be used to predict the future occurrence. A combination of occurrence model and quantitative model was used to perform a prediction for the next year.
Article
Entomology
Nina Sramel, Andreja Kavcic, Marija Kolsek, Maarten de Groot
Summary: The study tested five commercially available pheromone lures for monitoring Ips typographus outbreaks in Europe, with IT Ecolure Extra (R), Ipsowit (R), and Pheroprax (R) showing the best effectiveness. The cost of pheromones is relatively low compared to personnel costs. An index was created to assess the cost-efficiency of the pheromones, providing guidelines for future research in selecting the right pheromone for monitoring bark beetle populations.
JOURNAL OF APPLIED ENTOMOLOGY
(2021)
Article
Forestry
S. Karvemo, L. Huo, P. Ohrn, E. Lindberg, H. J. Persson
Summary: In recent decades, Norway spruce forests in Europe have suffered from large-scale tree mortality caused by the spruce bark beetle, which is influenced by storm-felling events and periods of drought due to climate change. This study compared the infestation patterns and configuration of the bark beetles after a storm and a drought in southern Sweden, finding differences in infestation occurrence and size related to forest structures and climate. The study highlights the importance of understanding the drivers behind bark beetle infestations triggered by different factors to develop more accurate outbreak predictions.
FOREST ECOLOGY AND MANAGEMENT
(2023)
Article
Forestry
Agata Zakrzewska, Dominik Kopec
Summary: This study develops an automatic workflow for detecting dead trees and trees in poor condition of Picea abies using Middle Wave Infrared spectral range obtained from the aircraft. By analyzing temperature data, different health conditions of trees can be accurately distinguished. The results confirm the effectiveness of fusing thermal and laser scanning data.
Article
Forestry
Aleksei Trubin, Pavel Mezei, Khodabakhsh Zabihi, Peter Surovy, Rastislav Jakus
Summary: Research indicates that drought stress caused by climate change can weaken forest ecosystems, leading to extensive bark beetle infestations. Unprecedented tree cover loss in Siberian spruce forests in Russia is linked to a severe outbreak of the Eurasian spruce bark beetle at higher latitudes. The study found that a combination of average annual temperature and precipitation, as well as temperature and precipitation in June, were the most important drivers of annual tree-loss.
FOREST ECOLOGY AND MANAGEMENT
(2022)
Article
Forestry
Mihai-Leonard Duduman, Katerina Berankova, Rastislav Jakus, Jaromir Hradecky, Anna Jirosova
Summary: This study compares the efficiency and sustainability of different designs of pheromone dispensers for controlling and monitoring Ips duplicatus bark beetles. The results show that wick dispensers have higher pheromone release rates, while polyethene foil dispensers are suitable for monitoring the flight activity of this species.
Article
Virology
Yuyao Zhu, Anna Lu, Zheng Wang, Quan Lu, Chengming Yu, Huixiang Liu
Summary: In this study, a novel fungal virus, named ObEV1, was obtained from O. bicolor and its genome sequence was determined. ObEV1 belongs to the genus Betaendornavirus and is a novel mycovirus. This is the first report of a mycovirus in O. bicolor.
ARCHIVES OF VIROLOGY
(2022)
Article
Multidisciplinary Sciences
Alexandre Kuhn, Louis Hautier, Gilles San Martin
Summary: This study investigated the effectiveness of pheromone trapping during a severe outbreak, and found no evidence supporting its use in reducing economic losses when combined with sanitation felling. The use of baited crosstraps may even increase the occurrence of new attacks.
Article
Biochemistry & Molecular Biology
Dineshkumar Kandasamy, Rashaduz Zaman, Yoko N. Nakamura, Tao Zhao, Henrik Hartmann, Martin Andersson, Almuth Hammerbacher, Jonathan Gershenzon
Summary: In recent years, outbreaks of the Eurasian spruce bark beetle have caused significant damage to conifer forests in Europe. The ability of these insects to kill mature trees is attributed to mass attacks on the host tree and the presence of fungal symbionts. The role of chemical communication in maintaining the fungal symbiosis is poorly understood. This study shows that the fungal symbionts metabolize spruce resin monoterpenes and produce oxygenated derivatives that act as cues for the beetles to locate breeding sites with beneficial symbionts.
Article
Forestry
Vojtech Sotola, Jaroslav Holusa, Karel Kuzelka, Emanuel Kula
Summary: The study found that trap trees with a pheromone evaporator can be used to capture Ips duplicatus, especially in forests containing high numbers of the beetles.
Article
Forestry
Olli-Pekka Tikkasalo, Kersti Leppa, Samuli Launiainen, Mikko Peltoniemi, Raisa Makipaa, Katja T. Rinne-Garmston, Elina Sahlstedt, Giles H. F. Young, Aleksandra Bokareva, Annalea Lohila, Mika Korkiakoski, Pauliina Schiestl-Aalto, Aleksi Lehtonen
Summary: This study investigated the physiological response of suppressed trees when larger trees are removed as part of continuous cover forestry (CCF) practices. The researchers collected tree-ring samples from Norway spruce trees and measured changes in stable carbon and oxygen isotopic ratios of the wood to quantify the harvest response. The study found that the model predicted a similar but lower harvest response compared to the measurements, and considering mesophyll conductance was important for capturing the variation in carbon discrimination. Sensitivity analysis on the model indicated that carbon discrimination was sensitive to parameters related to CO2 transport through stomata to the mesophyll.
