Journal of Forest Science, 2017 (vol. 63), issue 3

Forest canopy density assessment using different approaches - ReviewReview

Azadeh ABDOLLAHNEJAD, Dimitrios PANAGIOTIDIS, Peter SUROVÝ

J. For. Sci., 2017, 63(3):107-116 | DOI: 10.17221/110/2016-JFS  

Crown canopy is a significant regulator of forest, affecting microclimate, soil conditions and having an undeniable role in a forest ecosystem. Among the different materials and approaches that have been used for the estimation of crown canopy, satellite based methods are among the most successful methods regarding cost-saving efforts and different kinds of options for measuring the crown canopy. Different types of satellite sensors can result in different outputs due to their various spectral and spatial resolution, even when using the same methodologies. The aim of this review is to assess different remote sensing methods for forest crown canopy...

Growth performance and resistance to ground late frosts of Fagus sylvatica L. plantation treated with a brassinosteroid compoundOriginal Paper

Josef Gallo, Martin Baláš, Rostislav Linda, Ivan Kuneš

J. For. Sci., 2017, 63(3):117-125 | DOI: 10.17221/67/2016-JFS  

We measured the initial growth performance of a young plantation of European beech treated with a brassinosteroid compound prior to planting and compared it with a control treatment: we assessed heights, root collar diameters and mortality rate during the period 2012-2015. The trees showed posterior damage by ground frost after a substantial late frost event on the night of 4-5 May 2014. Therefore, we evaluated the post-stress vitality of trees, subsequent height increment from spring to August, and the height range of the damage. Mean height, root collar diameter, and mortality rate did not show any significantly better performance in the brassinosteroid...

Ecological functions of vegetation as potentials of ecosystem services (floodplain alder forest in the Tríbeč microregion)Original Paper

Pavol ELIÁŠ, Patrícia MARINIČOVÁ

J. For. Sci., 2017, 63(3):126-135 | DOI: 10.17221/58/2016-JFS  

Ecological functions of a black alder riparian forest (Aegopodio-Alnetum glutinosae) as capacities for the provision of ecosystem services were analysed and indicated by an inductive (bottom-up) approach. In July 2015, species richness and diversity of the forest stand were analysed in Hlboká valley, near Husárka water reservoir, Tríbeč Mountains, western Slovakia, by phytocoenological relevé, aboveground biomass of the herb layer and litter mass were estimated by a harvest method. The quantitative data obtained for the forest vegetation were used for estimation of capacities (potentials) of the floodplain forest to provide non-market...

Effect of black walnut (Juglans nigra) on the understorey vegetation - a case study of South Moravian forests (Czech Republic)Original Paper

Michal HRIB, Vilém PODRÁZSKÝ, Karel MATĚJKA, Jiří VIEWEGH

J. For. Sci., 2017, 63(3):136-148 | DOI: 10.17221/68/2016-JFS  

The article analyses the influence of black walnut on forest phytocoenosis in South Moravian forests and assesses how its representation may affect the understorey vegetation of the forest ecosystems. In July 2014, 31 relevés were processed in the South Moravian forests. These were stands of pure black walnut (Juglans nigra) as well as black walnut with small-leaved lime (Tilia cordata), along with neighbouring autochthonous stands (pure ash - European and narrow-leaved), oak (summer oak), or their mixtures. Ellenberg's indicator values reveal differences in the plant communities under black walnut comparing those under native tree...

The influence of evaporated pheromone upon the trapping of the spruce bark beetle - Ips typographus (L.) (Coleoptera: Curculionidae: Scolytinae) - Short communicationShort Communication

Marie ZAHRADNÍKOVÁ, Petr ZAHRADNÍK

J. For. Sci., 2017, 63(3):149-152 | DOI: 10.17221/1/2016-JFS  

This article examines the relative efficacy of releasing a larger pheromone plume volume and the relative efficacy of the number of pheromone dispensers within baited traps in trapping the spruce bark beetle. Pheromone plume is released from a standard pheromone dispenser, and a higher volume of pheromone was provided by an increased number of pheromone dispensers. A field trial with 30 pheromone baited traps was conducted in 2013 that used three dispenser variants over ten replications. Ten traps were baited with one pheromone dispenser, ten with two dispensers and ten with three dispensers. The pheromone dispensers were placed according to EPPO standard...