Journal of Forest Science, 2019 (vol. 65), issue 9
Growth response of mixed beech forests to climate change, various management and game pressure in Central EuropeOriginal Paper
Stanislav Vacek, Anna Prokůpková, Zdeněk Vacek, Daniel Bulušek, Václav Šimůnek, Ivo Králíček, Romana Prausová, Vojtěch Hájek
J. For. Sci., 2019, 65(9):331-345 | DOI: 10.17221/82/2019-JFS 
The growth, structure and production of mixed beech (Fagus sylvatica L.) forests were analysed in the Broumovsko Protected Landscape Area, Czech Republic. The objective of the paper was to evaluate stand structure, timber production and dynamics of forests with historically different silvicultural practices in relation to climate conditions, management and game damage. The results indicate that scree forests (coppices and coppices with standards) were stands with high-rich species diversity and structure compared to herb-rich beech forests (high forests) with higher timber production....
Peculiarities of seasonal development and influence of ecological factors on the growth of thuja giant (Thuja Plicata Donn Ex D. Don) in the conditions of introduction in the right-bank forest-steppe of UkraineOriginal Paper
Iryna Ivashchenko, Svitlana Adamenko, Volodymyr Shlapak
J. For. Sci., 2019, 65(9):346-355 | DOI: 10.17221/52/2019-JFS
Generalization and analysis of experimental data concerning peculiarities of passing and duration of various phenological phases of Th. plicata, their consistency with the sums of effective temperatures is provided in the article. Conducted researches based on observations and mathematical processing allowed to reveal the regularity of passing of all vegetative and generative phases in the area of introduction and to reveal the dependence of these processes on ecological factors. It was found that the vegetation period of this species is 151 ± 3 days. Influence of nature and degree of temperature, air humidity and rainfall...
The effect of pollen performance on low seed fertility in a Greek population of Juniperus excelsaOriginal Paper
Eleftherios K. Karapatzak, Georgios Varsamis, Irene Koutseri, Ioannis Takos, Theodora Merou
J. For. Sci., 2019, 65(9):356-367 | DOI: 10.17221/42/2019-JFS
The Juniperus excelsa (Cupressaceae) forest in northern Greece has been facing a documented severe decline of natural regeneration over the last few years. In order to dissect the physiological components of the low regeneration, pollen originated from different sites as well as from trees of different height was investigated in terms of viability and in vitro germination capacity. In addition, embryo development and viability of the first year immature seeds were further assessed. Pollen was found to present high viability (61.5-93.2%) in all sites and tree height classes. However, pollen germination was quite low...
Forest management decision-making using goal programming and fuzzy analytic hierarchy process approaches (case study: Hyrcanian forests of Iran)Original Paper
Seyedeh Soma Etemad, Soleiman Mohammadi Limaei, Leif Olsson, Rasoul Yousefpour
J. For. Sci., 2019, 65(9):368-379 | DOI: 10.17221/46/2019-JFS
The aim of this study is to determine the optimum stock level in the forest. In this research, a goal programming method was used to estimate the optimal stock level of different tree species considering environmental, economic and social issues. We consider multiple objectives in the process of decision-making to maximize carbon sequestration, net present value and labour. We used regression analysis to make a forest growth model and allometric functions for the quantification of carbon budget. Expected mean price is estimated using wood price and variable harvesting costs to determine the net present value of forest harvesting. The fuzzy analytic...