Template-Type: ReDIF-Article 1.0 Author-Name: Kritsadapan Palakit Author-Workplace-Name: Department of Forest Management, Faculty of Forestry, Kasetsart University, Bangkok, Thailand Author-Name: Khwanchai Duangsathaporn Author-Workplace-Name: Department of Forest Management, Faculty of Forestry, Kasetsart University, Bangkok, Thailand Author-Name: Nathsuda Pumijumnong Author-Workplace-Name: Faculty of Environment and Resource Studies, Mahidol University, Nakhon Pathom, Thailand Author-Name: Supasit Sriarkarin Author-Workplace-Name: Department of Forest Management, Faculty of Forestry, Kasetsart University, Bangkok, Thailand Author-Name: Thanyaporn Bungbai Author-Workplace-Name: Department of Forest Management, Faculty of Forestry, Kasetsart University, Bangkok, Thailand Author-Name: Pichit Lumyai Author-Workplace-Name: Department of Forest Management, Faculty of Forestry, Kasetsart University, Bangkok, Thailand Title: Tree-ring based climate reconstruction and growth-climate analysis of Pinus kesiya Royle ex Gordon in Doi Khuntan National Park, northern Thailand Abstract: Tree-ring analysis is a valuable tool for understanding long-term climate patterns and their influence on tree growth. This study investigates the climate-growth relationships of Khasi pine (Pinus kesiya Royle ex Gordon) in Doi Khuntan National Park, northern Thailand (at elevations of 850 to 1 035 m a.s.l.), to reconstruct past climate and inform forest management. Using 48 cross-dated increment cores, we developed an 83-year chronology (1936-2018). Standard dendrochronological methods and regression models were applied. The radial growth of P. kesiya was primarily influenced by moisture availability, showing significant positive correlations with March rainfall (r = 0.39, P < 0.01) and April-July relative humidity (r = 0.45, P < 0.01). Growth was negatively correlated with April-July mean temperature (r = -0.47, P < 0.01), indicating that warmer wet seasons induce stress. False-rings served as complementary intra-annual drought proxies, linked to cool-dry transitional periods. Multiple regression models explained 40.6% of radial growth variance and 65.6% of false-ring frequency variance. Reconstructed climate series revealed significant warming trends since the 1930s, most pronounced in April extreme minimum temperature, which increased by +0.98 °C over the study period (Mann-Kendall test, P < 0.01). These findings highlight the vulnerability of montane pine forests to increasing temperatures and atmospheric dryness, providing a multi-proxy baseline for climate change adaptation. Keywords: dendrochronology, false ring, intra-annual ring, Khasi pine, montane forest Journal: Journal of Forest Science Pages: 174-187 Volume: 72 Issue: 4 Year: 2026 DOI: 10.17221/78/2025-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/78/2025-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202604-0001.txt Handle: RePEc:caa:jnljfs:v:72:y:2026:i:4:id:78-2025-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Alexandra Porcsin Author-Workplace-Name: Faculty of Forestry, Institute of Natural Resources and Forest Management, University of Sopron, Sopron, Hungary Author-Name: Tamás Ábri Author-Workplace-Name: Department of Plantation Forestry, Forest Research Institute, University of Sopron, Püspökladány, Hungary Author-Name: Helga Déri Author-Workplace-Name: Department of Apiculture and Bee Biology, Institute for Farm Animal Gene Conservation, Gödöllő, Hungary Author-Name: Edit Zajácz Author-Workplace-Name: Department of Apiculture and Bee Biology, Institute for Farm Animal Gene Conservation, Gödöllő, Hungary Author-Name: Bence Bolla Author-Workplace-Name: Department of Forest Ecology, Forest Research Institute, University of Sopron, Budapest, Hungary Author-Name: Katalin Szakálosné Mátyás Author-Workplace-Name: Faculty of Forestry, Institute of Natural Resources and Forest Management, University of Sopron, Sopron, Hungary Author-Name: Károly Rédei Author-Workplace-Name: Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary Author-Name: Zsolt Keserű Author-Workplace-Name: Department of Plantation Forestry, Forest Research Institute, University of Sopron, Püspökladány, Hungary Title: Soil temperature and weather factors as key drivers of flowering phenology and nectar production in black locust (Robinia pseudoacacia L.) in Hungary Abstract: The black locust (Robinia pseudoacacia L.) is the second most planted tree species worldwide, and the most common in Hungary. Phenotypic traits, particularly flowering patterns, are well-established indicators of the species' response to climate change. This study examined four forest subcompartments across three Hungarian regions: Northern-Central, Eastern and Southern-Central. The aim was to identify climatic factors correlating with the onset and duration of the flowering period. Additionally, the relationships between these factors and nectar weight and sugar concentration were defined. Results indicate a strong negative correlation between precipitation levels and flowering time: lower accumulated and average precipitation during the spring months of the preceding year was associated with a delayed flowering period in the following year (r = -0.922, r = -0.918, P = 0.05). However, when examining the 14-day period (r = 0.829) before blooming or examining from 1 January (r = 0.929, r = 0.890), the results indicate that other environmental factors may play a more dominant role. Furthermore, the number of chill and heat days was found to affect the starting date (R2 = 0.819, R2 = 0.765). Keywords: apiculture, cultivars, flowering date, phenological plasticity, weather factors Journal: Journal of Forest Science Pages: 202-211 Volume: 72 Issue: 4 Year: 2026 DOI: 10.17221/6/2026-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/6/2026-JFS.html File-Format: text/html File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/6/2026-JFS.pdf File-Format: Application/pdf X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202604-0002.txt Handle: RePEc:caa:jnljfs:v:72:y:2026:i:4:id:6-2026-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Vít Šrámek Author-Workplace-Name: Department of Forest Ecology, Forestry and Game Management Research Institute, Prague, Czech Republic Author-Name: Kateřina Neudertová Hellebrandová Author-Workplace-Name: Department of Forest Ecology, Forestry and Game Management Research Institute, Prague, Czech Republic Author-Name: Věra Fadrhonsová Author-Workplace-Name: Department of Forest Ecology, Forestry and Game Management Research Institute, Prague, Czech Republic Title: Hydrological risks of clear-cuts after the bark beetle outbreaks and related forest management decisions in Central Europe Abstract: The review synthesises current knowledge on the hydrological and hydrochemical risks associated with large-scale clear-cutting following unprecedented bark beetle outbreaks in Central Europe. By analysing 107 sources published primarily between 2000 and 2026, we evaluate the divergent impacts of natural forest dieback versus intensive salvage logging. The rapid loss of Norway spruce [Picea abies (L.) Karst.] canopy has fundamentally altered the microclimate, shifting the energy balance from latent to sensible heat flux, which results in ground temperature increases of up to 5.2 °C. Hydrological consequences include a 16-48% reduction in interception and a cessation of transpiration, leading to an increase in annual water yield by 6-21% and potentially accelerated peak discharges, particularly in headwater catchments where maximum flows can increase by over 50%. The synthesis highlights a critical 'nitrate pulse' exceeding 50 mg.L-1 in managed areas, contrasting with higher hydrochemical resilience in unmanaged stands. We emphasise that forest management must ensure sufficient soil protection during the logging and wood transportation, which can reduce hydraulic conductivity by over 40%. The role of logging residues is important because they cover and protect the soil environment. The study concludes that utilising pioneer species and spontaneous succession in combination with timely artificial reforestation represents a superior strategy for stabilising the microclimate and restoring hydrological functions. Keywords: catchment management, ecohydrology, forest disturbance, Ips typographus, microclimate buffering, nitrogen leaching, salvage logging, soil compaction Journal: Journal of Forest Science Pages: 161-173 Volume: 72 Issue: 4 Year: 2026 DOI: 10.17221/19/2026-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/19/2026-JFS.html File-Format: text/html File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/19/2026-JFS.pdf File-Format: Application/pdf X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202604-0003.txt Handle: RePEc:caa:jnljfs:v:72:y:2026:i:4:id:19-2026-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Zemin Zhao Author-Workplace-Name: Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China Author-Name: Fuzhong Wu Author-Workplace-Name: Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China Author-Name: Yan Peng Author-Workplace-Name: Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China Author-Name: Qiqian Wu Author-Workplace-Name: College of Forestry and Biotechnology, Zhejiang Agricultural and Forestry University, Hangzhou, China Author-Name: Qiao Yang Author-Workplace-Name: Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China Author-Name: Chaoxiang Yuan Author-Workplace-Name: Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China Author-Name: Xiangyin Ni Author-Workplace-Name: Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China Author-Name: Kai Yue Author-Workplace-Name: Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China Title: Hydrology and carbon pool characteristics regulate dissolved carbon export in a subtropical forest headwater stream Abstract: Headwater streams are key pathways for carbon (C) transfer from terrestrial to aquatic ecosystems. Sediments and plant litter constitute major C pools in streams, yet their roles in regulating dissolved carbon (DC) exports remain poorly understood. Here, we investigated dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) concentrations and export through monthly sampling over one year in a subtropical forest headwater stream. DOC export peaked during the wet season (98.9 ± 171.8 kg.h-1), whereas DIC export showed no significant seasonal variation. During the wet season, C pool characteristics were more strongly related to DOC dynamics, whereas during the dry season they were more closely associated with DIC dynamics. DOC concentrations in sediments and plant litter were positively related to stream DOC concentrations, while higher total carbon (TC) storage showed weak relationships with DC exports. These results indicate that C pool characteristics influence stream C dynamics mainly through C quality rather than pool size, and that different C pools exert different effects on DOC and DIC dynamics. However, hydrological variables - especially stream discharge - exerted the strongest control on DC export. Together, these findings indicate that hydrology controls C export, whereas C pools regulate the composition of DC in headwater streams. Keywords: carbon storage, decay classes, dynamic, litter, sediment Journal: Journal of Forest Science Pages: 188-201 Volume: 72 Issue: 4 Year: 2026 DOI: 10.17221/68/2025-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/68/2025-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202604-0004.txt Handle: RePEc:caa:jnljfs:v:72:y:2026:i:4:id:68-2025-JFS