Template-Type: ReDIF-Article 1.0 Author-Name: Helena CVRČKOVÁ Author-Name: Pavlína MÁCHOVÁ Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: Lucie POLÁKOVÁ Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: Olga TRČKOVÁ Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Title: Evaluation of the genetic diversity of selected Fagus sylvatica L. populations in the Czech Republic using nuclear microsatellites Abstract: Fagus sylvatica Linnaeus (European beech), the ecologically and economically most important broadleaved tree species in the Czech Republic, was strongly reduced in the past. Today there are efforts to increase the proportion of beech to ensure optimal forest tree species composition. When extensively reintroducing beech, it is important to acquire more detailed knowledge of genetic diversity. Thirteen important beech populations in different stands in the territory of the Czech Republic were genotyped using 12 polymorphic nuclear microsatellite markers. The genotypic data from adult trees imply genetic differences between the populations. The estimated genetic diversity expressed as Shannon's information index ranged from 1.73 to 1.92. Thirteen beech populations showed excess homozygotes, as indicated by positive fixation index (F) values (F = 0.005-0.115). The pairwise FST values indicated low genetic differentiation between the 13 Czech beech populations, because they were greater than zero, that means they confirmed the presence of population structuring in Czech European beech. Not significant linear correlations were observed between genetic and geographic distances of the 13 beech populations studied on the basis of microsatellite markers. Twelve microsatellite markers were verified as highly polymorphic and suitable for genotyping of European beech populations. Keywords: DNA analysis, European beech populations, gene reserves, genetic distance, genetic variability, simple sequence repeats Journal: Journal of Forest Science Pages: 53-61 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/88/2016-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/88/2016-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201702-0001.txt Handle: RePEc:caa:jnljfs:v:63:y:2017:i:2:id:88-2016-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Aidin PARSAKHOO Author-Workplace-Name: Department of Forestry, Faculty of Forest Science, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran Author-Name: Mohsen MOSTAFA Author-Workplace-Name: Department of Forestry, Faculty of Forest Science, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran Author-Name: Shaban SHATAEE Author-Workplace-Name: Department of Forestry, Faculty of Forest Science, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran Author-Name: Majid LOTFALIAN Author-Workplace-Name: Department of Forestry, Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran Title: Decision support system to find a skid trail network for extracting marked trees Abstract: Careful planning of skid trails as wood extraction routes in forests is an ongoing task and necessary for minimizing the environmental damage. The main objective of this study is to find skid trails to extract marked trees from stand sites to landing sites using a GIS-based decision support system (DSS) and network analysis techniques, where environmental information is incorporated into the objective. The techniques were applied in a stand where single trees are felled in near-to-nature conditions. This system is called a single tree selection cutting method. Parameters considered for mapping the terrain stability include slope, soil and stream network. The analytical hierarchy process was used to estimate the weights of these parameters. Routing between marked trees and log landing was done using a GPS-tracking survey and then the analysis was done using new route and service area tools in GIS. The service area tool shows accessibility of marked trees by skid trails. Results showed that on average the length of the route decreased by 6.65 and 19.22% with the use of a new route tool in compartments 29 and 4, respectively. In conclusion, DSS techniques increased accessibility of marked trees and decreased the length of the route. Keywords: routing, slope stability, log landing, skidding, timber harvesting Journal: Journal of Forest Science Pages: 62-69 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/36/2016-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/36/2016-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201702-0002.txt Handle: RePEc:caa:jnljfs:v:63:y:2017:i:2:id:36-2016-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Majid LOTFALIAN Author-Workplace-Name: Department of Forestry, Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran Author-Name: Fatemeh SHEIKHMOONESI Author-Workplace-Name: Psychiatry and Behavioral Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran Author-Name: Mahbobeh SABZI Author-Workplace-Name: Department of Forestry, Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran Author-Name: Mahbobeh ABASPOUR Author-Workplace-Name: Department of Forestry, Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran Author-Name: Saba PEYROV Author-Workplace-Name: Department of Forestry, Faculty of Natural Resources, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran Title: Prevalence of burnout among forest workers in Mazandaran, Iran Abstract: Burnout imposes consequences and costs on the organization and employees, such as frequent job and workplace replacement, frequent absenteeism and permissions, and reduced work quantity and quality. So it seems necessary to perform institutional interventions to reduce the staff burnout. The aim of the present study was to determine prevalence of burnout among forest workers in Mazandaran. This descriptive cross-sectional study was conducted on a sample of workers in the forests of Mazandaran province. Result showed that a significant proportion of workers had burnout in terms of the three dimensions of Maslach Burnout Inventory. 46.90% of respondents suffered from high emotional exhaustion, 43.36% had high depersonalization and 49.56% of respondents suffered from low personal accomplishment. In this study it was shown that people with bachelor or higher degree (compared to people with a lower education level) were in better conditions in terms of all three dimensions of burnout; they had higher personal accomplishment and higher emotional exhaustion and lower depersonalization. It was shown that burnout is highly prevalent among chainsaw operators and skidder drivers. Keywords: Maslach Burnout Inventory, emotional exhaustion, personal accomplishment, psychological stress Journal: Journal of Forest Science Pages: 70-74 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/111/2015-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/111/2015-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201702-0003.txt Handle: RePEc:caa:jnljfs:v:63:y:2017:i:2:id:111-2015-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Martin FULÍN Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Strnady, Czech Republic Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Petr NOVOTNÝ Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Strnady, Czech Republic Author-Name: Vilém PODRÁZSKÝ Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: František BERAN Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Strnady, Czech Republic Author-Name: Jaroslav DOSTÁL Author-Workplace-Name: Department of Forest Tree Species Biology and Breeding, Forestry and Game Management Research Institute, Strnady, Czech Republic Author-Name: Jan JEHLIČKA Author-Workplace-Name: Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Evaluation of the provenance plot "Hrubá Skála" (Northern Bohemia) with grand fir at the age of 36 years Abstract: The article aims to evaluate the research provenance plot established in 1980 in locality No. 214 - Hrubá Skála (in the north of the Czech Republic), where nine provenances of grand fir (Abies grandis (Douglas ex D. Don) Lindley) provided in the framework of the International Union of Forest Research Organizations project, and one provenance of grand fir, Norway spruce, silver fir and Douglas-fir from a standard commercial source are tested. We present the results of tree height, stem DBH, stem volume production and health status after 36 years. The results correspond with similar experiments in the Czech Republic and abroad and suggest that grand fir provenances from Vancouver Island (British Columbia, Canada) and the Washington (USA) State coastal region show the best production features, while the Oregon Cascades, Idaho and Montana provenances grow more slowly. Comparison with other tree species indicates that the production of grand fir at the investigated age exceeds the production of both Norway spruce and silver fir, and equalizes or gently exceeds even Douglas-fir. Keywords: Abies grandis, growth, qualitative traits, quantitative traits, IUFRO Journal: Journal of Forest Science Pages: 75-87 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/79/2016-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/79/2016-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201702-0004.txt Handle: RePEc:caa:jnljfs:v:63:y:2017:i:2:id:79-2016-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Rafael M. NAVARRO-CERRILLO Author-Workplace-Name: Department of Forestry Engineering, School of Forest Engineering, University of Cordoba, Córdoba, Spain Author-Name: Eduardo GONZÁLEZ-FERREIRO Author-Workplace-Name: Department of Agroforestry Engineering, School of Forest Engineering, University of Santiago de Compostela, Lugo, Spain Author-Name: Jorge GARCÍA-GUTIÉRREZ Author-Workplace-Name: Department of Computer Science Languages and Systems, School of Industrial Engineering, University of Seville, Sevilla, Spain Author-Name: Carlos J. CEACERO RUIZ Author-Workplace-Name: Department of Physiology, Anatomy and Cellular Biology, Faculty of Biology, Pablo de Olavide University, Sevilla, Spain Author-Name: Rocío HERNÁNDEZ-CLEMENTE Author-Workplace-Name: Department of Geography, College of Science, Swansea University, Swansea, UK Title: Impact of plot size and model selection on forest biomass estimation using airborne LiDAR: A case study of pine plantations in southern Spain Abstract: We explored the usefulness of LiDAR for modelling and mapping the stand biomass of two conifer species in southern Spain. We used three different plot sizes and two statistical approaches (i.e. stepwise selection and genetic algorithm selection) in combination with multiple linear regression models to estimate biomass. 43 predictor variables derived from discrete-return LiDAR data (4 pulses per m2) were used for estimating the forest biomass of Pinus sylvestris Linnaeus and Pinus nigra Arnold forests. Twelve circular plots - six for each species - and three different fixed-radius designs (i.e. 7, 15, and 30 m) were established within the range of the airborne LiDAR. The Bayesian information criterion and R2 were used to select the best models. As expected, the models that included the largest plots (30 m) yielded the highest R2 value (0.91) for Pinus sp. using genetic algorithm models. Considering P. sylvestris and P. nigra models separately, the genetic algorithm approach also yielded the highest R2 values for the 30-m plots (P. nigra: R2 = 0.99, P. sylvestris: R2 = 0.97). The results we obtained with two species and different plot sizes revealed that increasing the size of plots from 15 to 30 m had a low effect on modelling attempts. Keywords: airborne laser scanning, forest inventory, regression, survey design, genetic selection methods, Pinus sp Journal: Journal of Forest Science Pages: 88-97 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/86/2016-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/86/2016-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201702-0005.txt Handle: RePEc:caa:jnljfs:v:63:y:2017:i:2:id:86-2016-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Stefanos STEFANOU Author-Workplace-Name: Laboratory of Soil Science, Department of Agricultural Technology, Alexander Technological Educational Institute of Thessaloniki, Sindos - Thessaloniki, Greece Author-Name: Athanasios PAPAIOANNOU Author-Workplace-Name: Laboratory of Forest Soils, Department of Forestry and Natural Environment, Aristotle University of Thessaloniki, Finikas - Thessaloniki, Greece Author-Name: Dimosthenis SEILOPOULOS Author-Workplace-Name: Laboratory of Forest Soils, Department of Forestry and Natural Environment, Aristotle University of Thessaloniki, Finikas - Thessaloniki, Greece Author-Name: Agapi PAPAZAFEIRIOU Author-Workplace-Name: Thessaloniki, Greece Title: Investigating the variation of diameter and height of Populus sp. clone I-214 under various fertilization treatments in northern Greece - a case study Abstract: The study of young poplar tree characteristics like initial diameter and height as well as mineral fertilization that promotes the rapid growth of trees for biomass production was the aim of this research. In two forest nurseries of northern Greece, the growth of Populus sp. clone I-214 under five fertilization treatments per dosage was studied, i.e. (i) 120 kg (NH4)2SO4.ha-1, (ii) 200 kg (NH4)2SO4.ha-1, (iii) 150 kg (NH4)2SO4.ha-1 and 300 kg mixed fertilizer 11-15-15 (i.e. 11 kg N, 15 kg P2O5 and 15 kg K2O per 100 kg of fertilizer) per ha, (iv) 150 kg (NH4)2SO4.ha-1, 200 kg mixed fertilizer 16-20-0 (i.e. 16 kg N and 20 kg P2O5 per 100 kg of fertilizer) per ha and 100 kg K2SO4.ha-1, (v) no fertilization. Results showed that initial diameter was the variable that had the greatest effect on growth, while the fertilization with 150 kg (NH4)2SO4.ha-1 and 300 kg mixed fertilizer 11-15-15 per ha improved significantly diameter growth. Nevertheless, no specific pattern was found statistically for the best fertilization treatment concerning the height growth of young poplar trees. These findings could be taken into account for the best management practices for rapid poplar tree growth and biomass production under similar edaphoclimatic Mediterranean conditions. Keywords: biomass production, Entisols, fertilizers, general linear model multivariate procedure, young poplar trees Journal: Journal of Forest Science Pages: 98-105 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/95/2016-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/95/2016-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201702-0006.txt Handle: RePEc:caa:jnljfs:v:63:y:2017:i:2:id:95-2016-JFS