Journal of Forest Science, 2010 (vol. 56), issue 3
The survey of some factors affecting bark lesion development caused by Phytophthora cactorum on common beech and other broadleaved trees
V. Holub, K. Černý, V. Strnadová, M. Mrázková, B. Gregorová, Š. Gabrielová
J. For. Sci., 2010, 56(3):93-100 | DOI: 10.17221/104/2009-JFS 
The three experiments relating to the pathogenicity of Phytophthora cactorum to beech and other forest tree species were carried out. The experiments were aimed to confirm pathogenicity of the pathogen, to compare its pathogenicity with the other Phytophthora species isolated from woody plants in the Czech Republic (P. gonapodyides, P. cambivora, P. citricola s.l., P. cinnamomi, P. citrophthora), to confirm its substrate specificity and diverse pathogenicity to common forest tree species (common beech, pedunculate oak, sycamore, small-leaved lime, black alder, common ash) and to determine the influence...
Pinus pumila growth at different altitudes in the Svyatoi Nos Peninsula (Russia)
R. Gebauer, D. Volařík, T. Funda, I. Fundová, A. Kohutka, V. Klapetek, M. Martinková, O. A. Anenkhonov, A. Razuvaev
J. For. Sci., 2010, 56(3):101-111 | DOI: 10.17221/60/2009-JFS
Detailed research is necessary to better understand ecological adaptations of Pinus pumila (Pall.) Regel as a species, whose biological properties are vital for its survival. In the Svyatoi Nos Peninsula, three sites differing in altitude were selected. At all sites the growth form of P. pumila was determined. At the high and medium sites, the following parameters were measured: linear increment on terminal branches, leaf mass per area and the content of nitrogen per unit leaf area. Anatomical studies were carried out on shoots and four needle-year classes. It was found that needles were longer and narrower at the medium site when...
Application of digital elevation model for mapping vegetation tiers
D. Volařík
J. For. Sci., 2010, 56(3):112-120 | DOI: 10.17221/74/2009-JFS
The aim of this paper is to explore possibilities of application of digital elevation model for mapping vegetation tiers (altitudinal vegetation zones). Linear models were used to investigate the relationship between vegetation tiers and variables derived from a digital elevation model - elevation and potential global radiation. The model was based on a sample of 138 plots located from the 2nd to the 5th vegetation tier. Potential global radiation was computed in r.sun module in geographic information system GRASS. The final model explained 84% of data variability and employed variables were found to be sufficient for modelling...
Dioszeghyana schmidtii (Diószeghy 1935), and survey its presence and abundance (Lepidoptera: Noctuidae; Hadeninae)
M. Turčáni, J. Patočka, J. Kulfan
J. For. Sci., 2010, 56(3):121-129 | DOI: 10.17221/55/2009-JFS
Dioszeghyana schmidtii (Dighy 1935), is forest species protected by European Union. Its distribution has been studied essentially by the use of light traps. However, its biology and habitat preferences are not sufficiently known and thus its habitats may be damaged by forest management. We suggest the beating method in order to collect larvae as an useful way to record and to survey D. schmidtii. Larvae of the species can be collected by beating branches of its host plants (Quercus and Acer species) in the lower canopy (below 3 m). Optimal survey time would be the second half of May and the first half of...
Possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils
R. Klvač, P. Vrána, R. Jiroušek
J. For. Sci., 2010, 56(3):130-136 | DOI: 10.17221/71/2009-JFS
The paper discusses possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils. Within the study, measurements were made using manual penetrometer and Loadman II portable falling weight deflectometer. To eliminate the extreme values, Grubbs's test was used. The results indicate that Loadman II deflectometer may be used to measure both the bearing capacity and compaction of forest soils under the canopy as well as in transport lines. A significant difference was found between deflection of water-unaffected sites and water-affected sites (12.08 and 2.31 mm, respectively). Measurements...
Road network optimization using heuristic and linear programming
M. R. Ghaffariyan, K. Stampfer, J. sessions, T. Durston, M. Kuehmaier, Ch. Kanzian
J. For. Sci., 2010, 56(3):137-145 | DOI: 10.17221/12/2009-JFS
To minimize the cost of logging, it is necessary to optimize the road density. The aim of this study was to determine optimal road spacing (ORS) in Northern Austria. The stepwise regression method was used in modelling. The production rate of tower yarder was 10.4 m3/PSHo (Productive system hours) and cost of 19.71 €.m-3. ORS was studied by calculating road construction cost, installation cost and yarding cost per m3 for different road spacing. The minimum total cost occurred at 39.15 €.m-3 and ORS would be 474 m assuming uphill and downhill yarding. The optimal road density and yarding distance...