Template-Type: ReDIF-Article 1.0 Author-Name: E. Kula Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Title: Geometridae (Insecta: Lepidoptera) in stands of substitute species with the dominant position of birch Abstract: 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 beech stands. Thanks to the uneven time of hatching moths of an eudominant species C. pusaria (L.) the danger of defoliation of birch stands in summer is reduced in spite of the species gradation potential. Keywords: larvae, Betula pendula, Krušné hory Mts., method of shaking off, light catcher, Geometridae Journal: Journal of Forest Science Pages: 197-207 Volume: 52 Issue: 5 Year: 2006 DOI: 10.17221/4502-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4502-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200605-0001.txt Handle: RePEc:caa:jnljfs:v:52:y:2006:i:5:id:4502-JFS Template-Type: ReDIF-Article 1.0 Author-Name: B. Schieber Title: Spring phenology of European beech (Fagus sylvatica L.) in a submountain beech stand with different stocking in 1995-2004 Abstract: 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 of the parent stand. The onset and course of phenophases also differed between the years. The trend of the average onset of leafing in the period 1995-2004 shows a shift to earlier dates by about three days. Temperature summation of average daily temperatures with the base temperature of 8°C, in the framework of the model predicted bud-burst of beech, showed the lowest variability in comparison with other temperatures. Keywords: Fagus sylvatica, phenology, bud-burst, leafing, temperature sum Journal: Journal of Forest Science Pages: 208-216 Volume: 52 Issue: 5 Year: 2006 DOI: 10.17221/4503-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4503-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200605-0002.txt Handle: RePEc:caa:jnljfs:v:52:y:2006:i:5:id:4503-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Z. Špinlerová Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Author-Name: M. Martinková Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Title: Growth of mountain pine (Pinus mugo Turra) in relation to the use of other tree species Abstract: 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 pine, other tree species and herbs; radiation transmittance and temperature gradients. Results show the importance of the height of mountain pine stands in mitigating climatic changes in the ground layer of air, identification of the light compensation point for the mountain pine prosperity, the dependence of a growth type on outer and inner conditions of mountain pine including partly its age. Under given conditions, the present stands of mountain pine on top parts of the Orlické hory Mts. show their justification because they create a good protection for young seedlings, self-seeding and newly planted tree species. If forest spreads there, the markedly heliophilous mountain pine will recede similarly as in case of more than hundred-year-old mountain pine in the Sowie gory Mts. in Poland. Keywords: mountain pine (Pinus mugo Turra), growth analysis, upright and ascending growth type, relative insolation, temperature gradient, heliophilous species, self-seeding species prosperity Journal: Journal of Forest Science Pages: 217-225 Volume: 52 Issue: 5 Year: 2006 DOI: 10.17221/4504-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4504-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200605-0003.txt Handle: RePEc:caa:jnljfs:v:52:y:2006:i:5:id:4504-JFS Template-Type: ReDIF-Article 1.0 Author-Name: A. Cicák Author-Workplace-Name: Institute of Forest Ecology of the Slovak Academy of Sciences, Zvolen, Slovak Republic Author-Name: I. Mihál Author-Workplace-Name: Institute of Forest Ecology of the Slovak Academy of Sciences, Zvolen, Slovak Republic Author-Name: Ch. Tsakov Author-Workplace-Name: Forest Research Institute of the Bulgarian Academy of Sciences, Sofia, Bulgaria Author-Name: P. Petkov Author-Workplace-Name: Forest Research Institute of the Bulgarian Academy of Sciences, Sofia, Bulgaria Title: Actual status of the beech bark necrotic disease in NorthWestern Bulgaria Abstract: 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 of three selected biotic vectors of beech necrotic disease were follows: the focus of occurrence of the species Bucculatrix ulmella was in submountain beech forests. Considerable affinity to lower situated sites was found in Ectoedemia liebwerdella. We also found that the boundary of the occurrence of this species is approximately at 1,000 m a.s.l. The frequency values of Cryptococcus fagi were significantly influenced by the altitude. In four out of six localities we recorded the occurrence of three species of the genus Nectria: Nectria cosmariospora, Nectria galligena and Nectria coccinea. Keywords: beech, Fagus sylvatica L., bark necroses, biotic vectors, Nectria sp., Bulharka Journal: Journal of Forest Science Pages: 226-232 Volume: 52 Issue: 5 Year: 2006 DOI: 10.17221/4505-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4505-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200605-0004.txt Handle: RePEc:caa:jnljfs:v:52:y:2006:i:5:id:4505-JFS Template-Type: ReDIF-Article 1.0 Author-Name: M. Klimánek Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Title: Optimization of digital terrain model for its application in forestry Abstract: 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 in several ways. In this sense a comparison of the first and second derivative of DTM and its real appearance in the terrain and a cross-validation procedure or terrain data measurements to compute and minimize the root mean square error values (RMSE) proved to be the most useful operations. The ZABAGED contour data provided the best results, with software specific algorithms for interpolations of contour data (ArcGIS Desktop Topo to Raster, Idrisi Kilimanjaro TIN). Keywords: digital terrain model, geographic information system, spatial surface interpolation, software TopoL, Atlas, Idrisi, ArcGIS, GRASS, data of ZABAGED, DMÚ25, OPRL, mean square error Journal: Journal of Forest Science Pages: 233-241 Volume: 52 Issue: 5 Year: 2006 DOI: 10.17221/4506-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4506-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200605-0005.txt Handle: RePEc:caa:jnljfs:v:52:y:2006:i:5:id:4506-JFS