Template-Type: ReDIF-Article 1.0 Author-Name: Petr Soudek Author-Workplace-Name: Laboratory of Plant Biotechnologies, Institute of Experimental Botany of the Czech Academy of Sciences, Prague, Czech Republic Author-Name: Jan Rezek Author-Workplace-Name: Laboratory of Plant Biotechnologies, Institute of Experimental Botany of the Czech Academy of Sciences, Prague, Czech Republic Author-Name: Kateřina Moťková Author-Workplace-Name: Laboratory of Plant Biotechnologies, Institute of Experimental Botany of the Czech Academy of Sciences, Prague, Czech Republic Author-Name: Šárka Petrová Author-Workplace-Name: Laboratory of Plant Biotechnologies, Institute of Experimental Botany of the Czech Academy of Sciences, Prague, Czech Republic Author-Name: Pavlína Máchová Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: Adam Véle Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: Martin Fulín Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: Petr Hošek Author-Workplace-Name: Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany of the Czech Academy of Sciences, Prague, Czech Republic Title: Changes in volatile organic compounds (VOCs) content in resistant and non-resistant forest trees in response to bark beetle attack Abstract: Corrigendum in: J. For. Sci. 2026 Feb 27;72(2):106. doi: 10.17221/16/2026-JFSThe response of forest trees to bark beetle attack involves substantial changes in terpene content, which varies between resistant and non-resistant species. Terpenes serve as crucial chemical defences against pests, and their production can be influenced by prior attack history, water stress, and biotic interactions. Moreover, the effectiveness of terpenes in resisting bark beetle attack is influenced by their chemical composition. Different tree species produce different types and amounts of terpenes that can affect their overall resistance levels. In conifers, acyclic and cyclic monoterpenes and sesquiterpenes were significantly present in all samples. Acyclic monoterpenes, ketones, aldehydes, monocarboxylic acids and their esters, and aromatic and cyclic compounds have been identified in beech. A statistically significant decrease of compounds in infested trees was determined in pine (cis-β-ocimene, neo-allo-ocimene, terpinene-4-ol, and δ-cadinene), and fir (acetophenone, benzonitrile, phenol, and zonarene). In addition, increased benzaldehyde production was observed. However, in infested beech trees, only increased production of some aliphatic and aromatic compounds (2-butanone and 3,5-octadien-2-one, 2-methyl-4-pentenal and 2,4-hexadienal, octanoic acid, nonanoic acid, 3,4-dimethyl-2,5-furandione, acetophenone, benzeneacetaldehyde, 2-ethyl-1H-pyrrole, β-ionone-5,6-epoxide, β-cyclocitral, and geranyl acetone) was found. We investigated the changes in the terpene composition of surviving trees in bark beetle-infested stands of beech (Fagus sylvatica), pine (Pinus sylvestris), and fir (Abies alba). Our data showed that the distribution of different groups of volatile compounds varied according to the tree species. Keywords: Abies alba, Fagus sylvatica, monoterpenes, Pinus sylvestris, sesquiterpenes Journal: Journal of Forest Science Pages: 218-236 Volume: 71 Issue: 5 Year: 2025 DOI: 10.17221/4/2025-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4/2025-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202505-0001.txt Handle: RePEc:caa:jnljfs:v:71:y:2025:i:5:id:4-2025-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Luboš Staněk Author-Workplace-Name: Department of Engineering, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Author-Name: Jindřich Neruda Author-Workplace-Name: Department of Engineering, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Author-Name: Radomír Ulrich Author-Workplace-Name: Department of Engineering, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Title: Changes in the concentration of CO2 in forest soils resulting from the traffic of logging machines Abstract: The aim of the study was to find out whether and how the forest soil compaction resulting from the traffic of forest logging machines results in the increased soil air concentration of CO2, occurring over a longer period of time and in different seasons of the year. Changes in the soil air CO2 concentrations were monitored in two periods: in winter (cold period) and in summer (warm period). CO2 concentrations were measured in compacted and non-compacted soil using a certified measurement. In addition to the soil concentration of CO2, air temperature, soil temperature and soil moisture content were measured. The research was conducted in the Czech Republic. The obtained data was subjected to statistical analyses (Student's t-test; correlation analysis). The results of the study confirm the long-term influence of soil compaction by the traffic of forest machinery on the CO2 concentration in soil in both seasons (cold and warm). The concentration of CO2 in the air of compacted soil was always significantly higher in both periods than the CO2 concentration in the air of non-compacted soil (control). Thus, the negative influence of soil compaction was clearly demonstrated as a result of a single pass of forestry machines over the soil surface. Keywords: carbon dioxide, compacted soil, forest ecosystems, soil disturbance, soil moisture, soil temperature Journal: Journal of Forest Science Pages: 250-267 Volume: 71 Issue: 5 Year: 2025 DOI: 10.17221/6/2025-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/6/2025-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202505-0002.txt Handle: RePEc:caa:jnljfs:v:71:y:2025:i:5:id:6-2025-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Petr Maděra Author-Workplace-Name: Department of Forest Botany, Dendrology and Geobiocoenology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Author-Name: Fabio Attorre Author-Workplace-Name: Department of Environmental Biology, Sapienza - University of Rome, Rome, Italy Author-Name: Kay Van Damme Author-Workplace-Name: Department of Forest Botany, Dendrology and Geobiocoenology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Title: New knowledge in dragon tree research Abstract: Dragon trees, arborescent members of the genus Dracaena (Asparagaceae), provide a wide range of ecosystem services and have been ethnobotanically important plants since ancient times. Currently, their relictual distribution is fragmented, populations are isolated and often under threat. We provide a brief overview of scientific studies and the state of knowledge on dragon trees published since 2020, when the last review was published. More than 120 papers dealing with dragon trees have appeared, indicating a significant interest in their research, cultural uses and conservation. The most intensively investigated species are Dracaena cochinchinensis, D. cinnabari, D. draco and D. cambodiana. Almost half of the papers deal with the chemical composition of resin and its bioactivity, in addition to studies on ecology, conservation and genetics. Only a few studies are devoted to taxonomy and ethnobotany. Keywords: anatomy, bioactivity, conservation, dragon tree group, morphology, phylogeny, phylogeography, resin, tree age estimation, threat Journal: Journal of Forest Science Pages: 205-217 Volume: 71 Issue: 5 Year: 2025 DOI: 10.17221/9/2025-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/9/2025-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202505-0003.txt Handle: RePEc:caa:jnljfs:v:71:y:2025:i:5:id:9-2025-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Budi Mulyana Author-Workplace-Name: Faculty of Forestry, Universitas Gadjah Mada, Yogyakarta, Indonesia Author-Name: Andrea Vityi Author-Workplace-Name: Faculty of Forestry, University of Sopron, Sopron, Hungary Author-Name: András Polgár Author-Workplace-Name: Faculty of Forestry, University of Sopron, Sopron, Hungary Title: Life cycle assessment of bioenergy production from short-rotation coppice plantation in Hungary Abstract: A short-rotation coppice (SRC) system for bioenergy production is vital to supporting climate change mitigation by absorbing CO2 from the atmosphere and storing carbon as biomass. However, SRC's operation also released some greenhouse gas emissions, affecting the environment. This study aims to assess the potential environmental impacts through the life cycle assessment method in bioenergy production from the SRC system. Data was collected through a literature review and database, and the impact categories were then analysed using Sphera LCA for Experts Education License software (Version 9.2.1.68, 2020). In managing plantations for bioenergy production, plants during one rotation (15 years) will be harvested every 3 years (harvesting cycle). Then, there will be five harvesting cycles during a single rotation. The result showed that the first cycle had the highest environmental impacts because the inputs (fuel, lubricant, electricity, fertiliser, and pesticides) in this cycle were higher than others. The highest contribution comes from the first and end cycles as 3 200 and 2 700 kg CO2 eq, respectively. Meanwhile, cycles 2, 3, and 4 contribute to the carbon footprint as 2 500 kg CO2 eq for each cycle. Based on input, fuel consumption has resulted in higher environmental impacts than lubricants, fertilisers, and electricity consumption. In conclusion, energy consumption (fuel, lubricant, and electricity) and agrochemicals (fertilisers and pesticides) have released emissions and affected the environment. In the future, fuel and agrochemical consumption should be reduced to minimise the negative environmental impacts in the short-rotation coppice system. Keywords: carbon footprint, climate change mitigation, environmental impacts, fast-growing species, forest plantation Journal: Journal of Forest Science Pages: 237-249 Volume: 71 Issue: 5 Year: 2025 DOI: 10.17221/10/2025-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/10/2025-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202505-0004.txt Handle: RePEc:caa:jnljfs:v:71:y:2025:i:5:id:10-2025-JFS