Journal of Forest Science, 2006 (vol. 52), issue 5
Geometridae (Insecta: Lepidoptera) in stands of substitute species with the dominant position of birch
E. Kula
J. For. Sci., 2006, 52(5):197-207 | DOI: 10.17221/4502-JFS 
The species spectrum of Geometridae, their seasonal and population dynamics and importance for the stability of birch stands in the air-polluted area of the Krušné hory Mts. was derived from a light trap [224 species of imagoes, particularly Cabera pusaria (L.), and Cyclophora albipunctata (Hufn.)] and the method of shaking off from birch crowns [52 species of larvae, particularly C. pusaria (L.), Operophtera fagata (Scharp.), Alcis repandata (L.), Biston betularius (L.), and C. albipunctata (Hufn.)]. O. fagata (Scharp.) has an economic importance for birch stands and newly established...
Spring phenology of European beech (Fagus sylvatica L.) in a submountain beech stand with different stocking in 1995-2004
B. Schieber
J. For. Sci., 2006, 52(5):208-216 | DOI: 10.17221/4503-JFS
Two spring phenophases (bud-burst and leaf unfolding) of a parent stand and naturally regenerated undergrowth of European beech were observed in conditions under different stand density over the last 10 years. The results proved the unequal onset of phenophases of the parent stand individuals in relation to their sociological status. In the case of codominant and dominant trees the delay of 2-5 days was observed in comparison with subdominant trees. The influence of the parent stand structure on the onset of the undergrowth phenophases was also observed. The onset of phenophases differed by 2-20 days among individuals grown under different density...
Growth of mountain pine (Pinus mugo Turra) in relation to the use of other tree species
Z. Špinlerová, M. Martinková
J. For. Sci., 2006, 52(5):217-225 | DOI: 10.17221/4504-JFS
In summit parts of the Orlické hory Mts., massive dieback of forests occurred during an air pollution/ecological disaster in the 70s to the 80s of the 20th century. Destroyed stands were cut down and deforested areas were planted by more resistant species including mountain pine (Pinus mugo Turra). The aim of the paper was to assess effects of mountain pine on the prosperity of other tree species. Four localities with mountain pine stands were selected at altitudes from 1,000 to 1,115 m. In 2003-2005, growth analyses of shrubs were carried out there and basic parameters of stands were determined such as: height; cover of mountain...
Actual status of the beech bark necrotic disease in NorthWestern Bulgaria
A. Cicák, I. Mihál, Ch. Tsakov, P. Petkov
J. For. Sci., 2006, 52(5):226-232 | DOI: 10.17221/4505-JFS
In this paper we present recent findings about the beech bark necrotic disease in selected localities situated in the mountain ranges Vitosha and Stara planina in Bulgaria. The resulting values of necrotic disease expressed by the necrotisation index (ISN) ranged from 0.72 to 1.12. In Slovakia such low values of ISN were obtained only for seven out of 52 examined localities. The ISN results are more favourable than the results obtained using the same methods for four localities situated in Northern Hungary (ISN values ranging from 1.11 to 1.18). The results of monitoring...
Optimization of digital terrain model for its application in forestry
M. Klimánek
J. For. Sci., 2006, 52(5):233-241 | DOI: 10.17221/4506-JFS
Digital terrain model (DTM) represents a very important geospatial data type. In the CzechRepublic, the most common digital contour data sources are the Primary Geographic Data Base (ZABAGED), the Digital Ground Model (DMÚ25) and eventually the Regional Plans of Forest Development (OPRL). In constructing regular raster DTM, the initial process requires interpolation between the points in order to estimate values in a regular grid pattern. In this study, constructions of DTM from the above-mentioned data were tested using several software products: ArcEditor 9.0, Atlas 3.8, GRASS 6.1, Idrisi 14.02 and TopoL 2001. Algorithm parameters can be optimized...