Template-Type: ReDIF-Article 1.0 Author-Name: I. Kozak Author-Workplace-Name: Catholic University in Lublin, Faculty of Landscape Systems, Lublin, Poland Author-Name: V. Menshutkin Author-Workplace-Name: Catholic University in Lublin, Faculty of Landscape Systems, Lublin, Poland Author-Name: M. Jóźwina Author-Workplace-Name: Catholic University in Lublin, Faculty of Landscape Systems, Lublin, Poland Author-Name: G. Potaczała Author-Workplace-Name: Catholic University in Lublin, Faculty of Landscape Systems, Lublin, Poland Title: Computer simulation of fir forest dynamics in the Bieszczady Mountains in response to climate change Abstract: Results of investigation of fir forest dynamics in the Bieszczady Mountains using a FORKOME (FORest KOzak MEnshutkin) model in response to climate changes are presented. The model was verified in field trials in 1998-2001 in a fir forest in forest district Procisne in the Bieszczady Mountains (Poland). Prediction of tree biomass and tree number was made for the next 600 years. The simulation demonstrated beech domination when mean annual temperature increases by 2°C while with a decrease in temperature by 2°C fir becomes dominant in the examined area. Both one simulation run and Monte Carlo simulation showed comparable results in statistical analysis. The results of FORKOME model simulations enable to set a thesis that forest succession may be used for evaluating the level of climate-change influence on forest ecosystems. Presented results indicate great usefulness of the model while investigating various subjects, especially concerning climate changes, which may have both theoretical and practical importance. Keywords: forest, fir, computer model, climate changes, Bieszczady Journal: Journal of Forest Science Pages: 425-431 Volume: 48 Issue: 10 Year: 2002 DOI: 10.17221/11909-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11909-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200210-0001.txt Handle: RePEc:caa:jnljfs:v:48:y:2002:i:10:id:11909-JFS Template-Type: ReDIF-Article 1.0 Author-Name: J. Holuša Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: Ľ. Vidlička Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Title: Chrysopids and Hemerobiids (Plannipenia) of young spruce forests in the eastern part of the Czech Republic Abstract: Chrysopids and Hemerobiids were studied using Malaise traps in young spruce forests in the eastern part of the Czech Republic. A total of 12 species were found. The most abundant species were eurytopic Chrysopa carnea, Chrysopa perla, Hemerobius humulinus and Hemerobius pini associated with conifers. The seasonal flight activity of these species is discussed. Keywords: Chrysopidae, Hemerobiidae, Malaise trap, spruce forests, seasonal flight activity, Czech Republic Journal: Journal of Forest Science Pages: 432-440 Volume: 48 Issue: 10 Year: 2002 DOI: 10.17221/11912-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11912-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200210-0002.txt Handle: RePEc:caa:jnljfs:v:48:y:2002:i:10:id:11912-JFS Template-Type: ReDIF-Article 1.0 Author-Name: I. Kupka Author-Workplace-Name: Czech University of Agriculture, Faculty of Forestry, Prague, Czech Republic Title: Natural regeneration at different microclimatic sites in Zatec region Abstract: Natural regeneration is an important part of close-to-nature forestry. However, natural regeneration also has either natural or technological limits. Among the most important natural limits are a low sum of precipitation and site type. The study concentrates on Žatec region where the long term average sum of precipitation is only 440-450 mm per year. Dry periods during the vegetation time are quite frequent. The study was conducted on clear cut area, stand edge, shelterwood area and stand interior. The results showed the highest population densities in a shelterwood system, the lowest in the stand interior. On the other hand, the dry seedling biomass is lower for seedlings from shelterwood area than from clear cut area. Keywords: shelterwood system, clear cut system, natural regeneration, seedling population density, dry seedling biomass Journal: Journal of Forest Science Pages: 441-450 Volume: 48 Issue: 10 Year: 2002 DOI: 10.17221/11913-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11913-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200210-0003.txt Handle: RePEc:caa:jnljfs:v:48:y:2002:i:10:id:11913-JFS Template-Type: ReDIF-Article 1.0 Author-Name: J. Stanovský Author-Workplace-Name: Forestry Projections, Frýdek-Místek, incorporated company, Czech Republic Title: The influence of climatic factors on the health condition of forests in the Silesian Lowland Abstract: In the nineties of the 20th century, forest ecosystems in the Silesian Lowland were seriously disturbed by a large disaster with massive increase in the occurrence of biotic and abiotic harmful agents. The majority of old growth was cut there especially that with allochthonous spruce (Picea excelsa). Relations between the course of climatic factors (annual precipitation amount, annual average temperature) and the level of unregulated felling were studied. Keywords: Silesian Lowland, climatic factors, unregulated felling Journal: Journal of Forest Science Pages: 451-458 Volume: 48 Issue: 10 Year: 2002 DOI: 10.17221/11910-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11910-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200210-0004.txt Handle: RePEc:caa:jnljfs:v:48:y:2002:i:10:id:11910-JFS Template-Type: ReDIF-Article 1.0 Author-Name: S.P. Sah Author-Workplace-Name: Institute of Soil Science and Forest Nutrition, Göttingen University, Göttingen, Germany Author-Name: P.K. Jha Author-Workplace-Name: Institute of Soil Science and Forest Nutrition, Göttingen University, Göttingen, Germany Author-Name: N. Lamersdorf Author-Workplace-Name: Institute of Soil Science and Forest Nutrition, Göttingen University, Göttingen, Germany Title: Nutrient status of natural and healthy sissoo forest and declining plantation sissoo forest (Dalbergia sissoo, Roxb.) in Nepal Abstract: Sissoo (Dalbergia sissoo, Roxb.) is a nitrogen fixing leguminous tree species with natural habitat in the lowland region of Nepal called Terai up to an altitude of 1,000 m. For the last few years, this economically important tree species has been dying rapidly in the plantation forests. On the contrary, its status in the natural forest in riverine areas has been unknown yet. The paper compares the nutrient status of natural and healthy sissoo forest with declining plantation sissoo one. It is evident from this study that both stands do not differ very much with respect to their soil and plant nutrients. Therefore it was concluded that the waterlogging of soil was the main factor responsible for the decline of plantation sissoo forest. Keywords: sissoo forest, Dalbergia sissoo, health status, declining plantations, nutrients, soil texture, waterlogging, Nepal Journal: Journal of Forest Science Pages: 459-466 Volume: 48 Issue: 10 Year: 2002 DOI: 10.17221/11929-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/11929-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200210-0005.txt Handle: RePEc:caa:jnljfs:v:48:y:2002:i:10:id:11929-JFS