Template-Type: ReDIF-Article 1.0
Author-Name: Azadeh ABDOLLAHNEJAD
Author-Name: Dimitrios PANAGIOTIDIS
Author-Workplace-Name: Department of Forest Management, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
Author-Name: Peter SUROVÝ
Author-Workplace-Name: Department of Forest Management, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
Title: Forest canopy density assessment using different approaches - Review
Abstract: 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 density assessment.
Keywords: satellite sensors, vegetation index, classification methods, pixel based, spectral analyses
Journal: Journal of Forest Science
Pages: 107-116
Volume: 63
Issue: 3
Year: 2017
DOI: 10.17221/110/2016-JFS
File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/110/2016-JFS.html
File-Format: text/html
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Handle: RePEc:caa:jnljfs:v:63:y:2017:i:3:id:110-2016-JFS

Template-Type: ReDIF-Article 1.0
Author-Name: Josef Gallo
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
Author-Name: Rostislav Linda
Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
Author-Name: Ivan Kuneš
Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
Title: Growth performance and resistance to ground late frosts of Fagus sylvatica L. plantation treated with a brassinosteroid compound
Abstract: 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 treatment over the control treatment. Neither did the application treatment have a significant positive effect on the resistance of beech to late frosts. The severe frost damage was most intense at 30 cm above ground, and rapidly declined with increased height.
Keywords: European beech, brassinolide, frost events, vitality of trees, forest plantations
Journal: Journal of Forest Science
Pages: 117-125
Volume: 63
Issue: 3
Year: 2017
DOI: 10.17221/67/2016-JFS
File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/67/2016-JFS.html
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Handle: RePEc:caa:jnljfs:v:63:y:2017:i:3:id:67-2016-JFS

Template-Type: ReDIF-Article 1.0
Author-Name: Pavol ELIÁŠ
Author-Workplace-Name: Department of Ecology, Faculty of European Studies and Regional Development, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic
Author-Name: Patrícia MARINIČOVÁ
Title: Ecological functions of vegetation as potentials of ecosystem services (floodplain alder forest in the Tríbeč microregion)
Abstract: 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 ecosystem services. The forage, melliferous and therapeutic potential were estimated and calculated by Jurko's methods of ecological and socio-economic evaluations of vegetation. Aboveground biomass (production potential) of the forest understorey community was relatively high (seasonal maximum standing crop 59.03 g.m-2 in dry mass). The result of evaluation of the forage potential of the alder forest was higher than 50%, it means medium forage quality community. The melliferous potential was evaluated close to 190% (= high potential). The share of medicinal plants in the studied plant community was higher than 30%, referred to as extremely rich therapeutic potential. The analyses confirmed that the forest community represents high potentials for providing production ecosystem services.
Keywords: biomass, black alder forest, herbaceous understorey, provisioning and production services, western Slovakia
Journal: Journal of Forest Science
Pages: 126-135
Volume: 63
Issue: 3
Year: 2017
DOI: 10.17221/58/2016-JFS
File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/58/2016-JFS.html
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Handle: RePEc:caa:jnljfs:v:63:y:2017:i:3:id:58-2016-JFS

Template-Type: ReDIF-Article 1.0
Author-Name: Michal HRIB
Author-Workplace-Name: Department of Forestry and Wood Economics, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, 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: Karel MATĚJKA
Author-Workplace-Name: IDS, Prague, Czech Republic
Author-Name: Jiří VIEWEGH
Author-Workplace-Name: Štěpánovice, Czech Republic
Title: Effect of black walnut (Juglans nigra) on the understorey vegetation - a case study of South Moravian forests (Czech Republic)
Abstract: 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 species for the variables nitrogen, soil reaction and temperature. In addition, total cover is significantly higher under walnut. Other differences are visible from the detrended correspondence analysis ordination. The study also confirmed that in the stands of black walnut the preference of some species is suppressed, for example Brachypodium sylvaticum and Poa nemoralis in alluvial forests and Melica uniflora in hilly forests.
Keywords: Ellenberg's indicator values, herb layer, indigenous species, ordination, relevés
Journal: Journal of Forest Science
Pages: 136-148
Volume: 63
Issue: 3
Year: 2017
DOI: 10.17221/68/2016-JFS
File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/68/2016-JFS.html
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Handle: RePEc:caa:jnljfs:v:63:y:2017:i:3:id:68-2016-JFS

Template-Type: ReDIF-Article 1.0
Author-Name: Marie ZAHRADNÍKOVÁ
Author-Workplace-Name: Department of Forest Protection and Entomology, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic
Author-Name: Petr ZAHRADNÍK
Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic
Title: The influence of evaporated pheromone upon the trapping of the spruce bark beetle - Ips typographus (L.) (Coleoptera: Curculionidae: Scolytinae) - Short communication
Abstract: 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 PP1/152(4) in a fully randomized design. The highest trapping was achieved by the variant using three pheromone dispensers, and the lowest trapping was achieved by the two pheromone dispenser variant. There was no statistically significant difference between the three variants. The results suggest that the efficacy of pheromone traps cannot be increased solely through an increase in the number of pheromone dispensers.
Keywords: pheromone trap, pheromone dispenser, increased efficacy, forest protection
Journal: Journal of Forest Science
Pages: 149-152
Volume: 63
Issue: 3
Year: 2017
DOI: 10.17221/1/2016-JFS
File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/1/2016-JFS.html
File-Format: text/html
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Handle: RePEc:caa:jnljfs:v:63:y:2017:i:3:id:1-2016-JFS