Journal of Forest Science, 2019 (vol. 65), issue 2

Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and its role in the Czech forestsReview

Jan Mondek, Martin Baláš

J. For. Sci., 2019, 65(2):41-50 | DOI: 10.17221/9/2019-JFS  

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...

Interception and soil water relation in Norway spruce stands of different age during the contrasting vegetation seasons of 2017 and 2018Original Paper

Vít Šrámek, Kateřina Neudertová Hellebrandová, Věra Fadrhonsová

J. For. Sci., 2019, 65(2):51-60 | DOI: 10.17221/135/2018-JFS  

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...

Forest landscape aesthetic quality model (FLAQM): A comparative study on landscape modelling using regression analysis and artificial neural networksOriginal Paper

Ali Jahani

J. For. Sci., 2019, 65(2):61-69 | DOI: 10.17221/86/2018-JFS  

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...

Potential of Landsat spectral indices in regard to the detection of forest health changes due to drought effectsOriginal Paper

Martin Hais, Kateřina Neudertová Hellebrandová, Vít Šrámek

J. For. Sci., 2019, 65(2):70-78 | DOI: 10.17221/137/2018-JFS  

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...

Influence of morphometric parameters of relief on macro- and microstructure of wood Pinus silvestris L. in the North of the Russian plainShort Communication

Nikolay A. Neverov, Vladimir V. Belyaev, Zinaida B. Chistova, Yuri G. Kutinov, Vadim V. Staritsyn, Elena V. Polyakova, Alexander L. Mineev, Olga N. Tyukavina

J. For. Sci., 2019, 65(2):79-85 | DOI: 10.17221/123/2018-JFS  

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)....