Template-Type: ReDIF-Article 1.0 Author-Name: Jan Mondek Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Workplace-Name: Forest Management Institute in Brandýs nad Labem, Branch České Budějovice, Rudolfov, Czech Republic Author-Name: Martin Baláš Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and its role in the Czech forests Abstract: The presented study summarizes the results concerning the effects of cultivation of Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) in the Czech Republic. It focuses on more recent results, published especially in the last decades, it includes also older relevant data. It describes the intensity of production as well as non-production forest functions in the conditions of the Czech Republic. It analyses the research results concerning the volume and value production in comparison with native tree species, also documents effects on soil and herb vegetation diversity in forest ecosystems, and from point of view of stability and cultivation in the last period. Main target is defined by the comparison with the Norway spruce, which can be with advantages substituted partly by this species, with favourable impact on amount and value of the timber production, on the forest soil and ground vegetation biodiversity status. Also the stability of forest stands can be supported considerably. This species represents important alternative to the Norway spruce in lower and middle altitudes and it can contribute considerably to the competitiveness of the Czech forestry. Keywords: literature review, introduction, production, environment Journal: Journal of Forest Science Pages: 41-50 Volume: 65 Issue: 2 Year: 2019 DOI: 10.17221/9/2019-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/9/2019-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201902-0001.txt Handle: RePEc:caa:jnljfs:v:65:y:2019:i:2:id:9-2019-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Vít Šrámek Author-Name: Kateřina Neudertová Hellebrandová Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: Věra Fadrhonsová Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Title: Interception and soil water relation in Norway spruce stands of different age during the contrasting vegetation seasons of 2017 and 2018 Abstract: Interception, soil moisture and soil water potential were observed in four Norway spruce stands of different age in two subsequent vegetation seasons 2017 and 2018. Vegetation season 2018 can be characterized as being abnormally hot and dry with only 66% of precipitation in comparison with normal conditions. The interception of spruce increased with the stand age and its dimensions, ranging between 16 and 48% in 2017 and in the majority of stands even increasing in 2018. The soil moisture significantly decreased during the vegetation season 2018, with soil water potential close to the permanent wilting point (-1.5 MPa) for a substantial part of the monitored period. Differences between individual stands were observed in terms of the soil water potential (SWP) development which does not follow the interception patterns suggesting that the stand transpiration is a driving factor responsible for the soil water budget. In all stands, with the exception of the oldest one, the SWP of the upper soil horizon was less than 1.5 MPa for more than 80 days. In such extreme conditions the drought would negatively influence any Norway spruce stand regardless of its age or structure. Keywords: water balance, precipitation, throughfall, soil moisture, drought episodes Journal: Journal of Forest Science Pages: 51-60 Volume: 65 Issue: 2 Year: 2019 DOI: 10.17221/135/2018-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/135/2018-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201902-0002.txt Handle: RePEc:caa:jnljfs:v:65:y:2019:i:2:id:135-2018-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Ali Jahani Title: Forest landscape aesthetic quality model (FLAQM): A comparative study on landscape modelling using regression analysis and artificial neural networks Abstract: Today, the landscape aesthetic quality assessment is more technical and quantitative in environmental management. We aimed at developing artificial neural network (ANN) modelling and multiple regression (MLR) analysis approaches to predict the perceptional aesthetic quality of forest landscapes. The methodology, followed in this paper, can be divided into six distinct parts: (i) selection of representative study sites, (ii) mapping of landscape units, (iii) quantification of naturalness indicators, (iv) visibility analysis, (v) assessment of human perceptions, (vi) ANN and MLR modelling and sensitivity analysis. The results of ANN modelling, especially its high accuracy (R2 = 0.871) in comparison with MLR results (R2 = 0.782), introduced the forest landscape aesthetic quality model (FLAQM) as a comparative model for an assessment of forest landscape aesthetic quality. According to sensitivity analysis, the values of livestock density, tree harvesting, virgin forest, animal grazing, and tree richness were identified as the most significant variables which influence FLAQM. FLAQM can be used to compare the classes of aesthetic quality of forests. Keywords: ANN, landscape unit, multiple regression, assessment, sensitivity analysis, environmental management Journal: Journal of Forest Science Pages: 61-69 Volume: 65 Issue: 2 Year: 2019 DOI: 10.17221/86/2018-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/86/2018-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201902-0003.txt Handle: RePEc:caa:jnljfs:v:65:y:2019:i:2:id:86-2018-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Martin Hais Author-Workplace-Name: Department of Ecosystem Biology, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic Author-Name: Kateřina Neudertová Hellebrandová Author-Workplace-Name: Department of Forest Ecology, Forestry and Game Management Research Institute, Strnady, Czech Republic Author-Name: Vít Šrámek Author-Workplace-Name: Department of Forest Ecology, Forestry and Game Management Research Institute, Strnady, Czech Republic Title: Potential of Landsat spectral indices in regard to the detection of forest health changes due to drought effects Abstract: Because of climatic variability that has been increasing in last decades a higher drought risk seriously influences the forest vitality from regional to global scale. Despite there are of many studies that describe the spectral response of forest stands to the water stress, there is still a lack of information concerning the full understanding of forest reaction to the water deficiency over a longer time period. We hypothesize that the various severity and/or frequency of drought periods will result in different spectral responses of forest stands. The forest response was detected using two spectral vegetation indices (normalized difference moisture index - NDMI, wetness) which are widely used for the detection of forest health changes. These indices were calculated on the basis of Landsat (TM, ETM+ and OLI) imagery which includes 105 scenes from the 2005-2016 period. The area of our interest includes 300 forest stands (dominated with Norway spruce) in the Czech Republic, Moravia. These stands were identified as damaged by drought that occurred during the 2012-2017 period. To document the climatic water deficiency, two climatic indices were calculated (AWBPE, standardized precipitation evapotranspiration index). Despite high correlation of both spectral indices, the NDMI has high sensitivity to the drought events. However, both indices significantly decreased in reaction to the drought events. In case of the 2012 drought event the decrease was one year delayed, probably due to the lower severity of drought effect. The both groups of spectral and climatic indices bring valuable information in regard to the description and understanding of drought effect on the spruce forest stands. Keywords: meteorologiacal modeling, remote sensing, Norway spruce, spectral trajectories, forest disturbances Journal: Journal of Forest Science Pages: 70-78 Volume: 65 Issue: 2 Year: 2019 DOI: 10.17221/137/2018-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/137/2018-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201902-0004.txt Handle: RePEc:caa:jnljfs:v:65:y:2019:i:2:id:137-2018-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Nikolay A. Neverov Author-Workplace-Name: Federal Center for Integrated Arctic Research named after N.P. Laverov, Russian Academy of Sciences, Arkhangelsk, Russia Author-Name: Vladimir V. Belyaev Author-Workplace-Name: Federal Center for Integrated Arctic Research named after N.P. Laverov, Russian Academy of Sciences, Arkhangelsk, Russia Author-Name: Zinaida B. Chistova Author-Workplace-Name: Federal Center for Integrated Arctic Research named after N.P. Laverov, Russian Academy of Sciences, Arkhangelsk, Russia Author-Name: Yuri G. Kutinov Author-Workplace-Name: Federal Center for Integrated Arctic Research named after N.P. Laverov, Russian Academy of Sciences, Arkhangelsk, Russia Author-Name: Vadim V. Staritsyn Author-Workplace-Name: Federal Center for Integrated Arctic Research named after N.P. Laverov, Russian Academy of Sciences, Arkhangelsk, Russia Author-Name: Elena V. Polyakova Author-Workplace-Name: Federal Center for Integrated Arctic Research named after N.P. Laverov, Russian Academy of Sciences, Arkhangelsk, Russia Author-Name: Alexander L. Mineev Author-Workplace-Name: Federal Center for Integrated Arctic Research named after N.P. Laverov, Russian Academy of Sciences, Arkhangelsk, Russia Author-Name: Olga N. Tyukavina Author-Workplace-Name: Department of Biology, Ecology and Biotechnology, Faculty of Natural Sciences and Technology, North (Arctic) Federal University named after M.V. Lomonosov, Arkhangelsk, Russia Title: Influence of morphometric parameters of relief on macro- and microstructure of wood Pinus silvestris L. in the North of the Russian plain Abstract: Pine grows in a variety of environmental conditions which form several of technical properties of wood. The purpose of this study is an analysis of the morphology and the structure (i.e., the annual ring width, the latewood content, the tracheid wall thickness of the early- and latewood) of pine wood growing in areas with different relief and soil condition. The annual ring width and the latewood content don't have a pronounced dependence on the relief. The tracheid wall thickness of early wood has a high degree of correlation with aspect, photosynthetically active radiation (PAR) and diurnal anisotropic heating - DAH (r = -0.81 to -0.88). The tracheid wall thickness latewood is highly correlated with topographic wetness index and profile curvature (r = 0.88). The relief parameters PAR and DAH, which characterize the distribution of insolation, have a high degree of correlation with the tracheid wall thickness of early wood. In the conditions of the middle taiga subzone the flat relief influences the microstructure of pine wood due to redistribution of heat and moisture. Keywords: pine, relief, morphology and structure of wood, Arkhangelsk region Journal: Journal of Forest Science Pages: 79-85 Volume: 65 Issue: 2 Year: 2019 DOI: 10.17221/123/2018-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/123/2018-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201902-0005.txt Handle: RePEc:caa:jnljfs:v:65:y:2019:i:2:id:123-2018-JFS