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orest and other plant communities on the Iški vintgar left bank
No full textBetween 2004 and 2013, we studied and in 2013 also mapped the vegetation (applying the standard Central-European phytocoenological method) on the left bank of the Iški vintgar gorge (the central river basin of the Iška River, Dinaric phytogeographical region, research area 170,3 ha), which had never been studied in detail till then. On the basis of analysis of numerous analytic and synoptic tables (analyzed also by mathematical and statistical methods (Podani, 2001), the following syntaxa were identified: Primulo carniolicae-Pinetum nigrae, Fraxino orni-Pinetum nigrae var. geogr. Primula carniolica rhododendretosum hirsuti var. Laserpitium krapfii, Thymopraecocis-Pinetum nigrae s. lat., Querco-Ostryetum carpinifoliae s. lat., Carici sempervirentis-Ostryetum carpinifoliae, Omphalodo-Fagetum s. lat., Rhododendro hirsuti-Fagetum s. lat., Rhododendro hirsuti-Ostryetum s. lat., Hacquetio epipactis-Fagetum s. lat., Arunco-Fagetum s. lat., Lamio orvalae-Fagetum s. lat., Seslerio autumnalis-Fagetum s. lat., Ostryo carpinifoliae-Fagetum s. lat., Ostryo carpinifoliae-Piceetum and other nonforest communities. The majority of these syntaxa were identified even down to the lower syntaxonomic units. The results of our vegetation investigations highlight extraordinary vegetational and ecological diversity of the Iški vintgar left bank, which is without comparison in its immediate and wider vicinity
Strokovne podlage k predlogu sprememb "Pravilnika o načinu vračila trošarine za energente, ki se porabijo za pogon kmetijske in gozdarske mehanizacije" (Uradni list, št. 21/2013, 54/2014) za gozdna zemljišča (na osnovi predloga Kmetijsko gozdarske zbornice Slovenije za povrnitev trošarine za gorivo, ki se nameni sanaciji gozdov) : strokovno mnenje
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Impact of free-ranging large herbivores on grassland ecosystems
No full textFree-ranging large herbivores are keystone species in terrestrial ecosystems, and have an important ecological role by affecting both the structure and the function of plant communities and other groups of organisms. Large herbivores often increase plant diversity especially in more productive grasslands such as temperate grasslands in Europe. Additionally, other important effects of ruminants are redistribution of nutrients by feeding and subsequent excretion of urine and dung, soil compaction and erosion via trampling and dispersal of seeds, respectively. In Europe, populations of several ruminants species are increasing both in number and geographical distribution, and problems connected with effects of grazing of red deer (Cervus elaphus L.) on grassland in some locations in Slovenia have been increasing as well. Several areas of the Inner Carniola and Kočevje regions have been overgrown with forest, and these areas have the highest density of red deer. Therefore, the pressure of red deer on the remaining grasslands is increasing and may cause important economic loss for land owners. Ungulates can affect the economic profitability of grasslands also indirectly, through the impact on species composition of grasslands and by altering the overall productivity of soil. For proper management of their populations both direct and indirect ecological impacts and value of free-ranging ungulates have to be known. Therefore, an overview of foreign and Slovene studies related to the impacts of free-ranging ruminants on grassland ecosystems is presented in the paper
Woody biomass production lags stem-girth increase by over one month in coniferous forests
No full textWood is the main terrestrial biotic reservoir for long-term carbon sequestration, and its formation in trees consumes around 15% of anthropogenic carbon dioxide emissions each year. However, the seasonal dynamics of woody biomass production cannot be quantified from eddy covariance or satellite observations. As such, our understanding of this key carbon cycle component, and its sensitivity to climate, remains limited. Here, we present high-resolution cellular based measurements of wood formation dynamics in three coniferous forest sites in northeastern France, performed over a period of 3 years. We show that stem woody biomass production lags behind stem-girth increase by over 1 month. We also analyse more general phenological observations of xylem tissue formation in Northern Hemisphere forests and find similar time lags in boreal, temperate, subalpine and Mediterranean forests. These time lags question the extension of the equivalence between stem size increase and woody biomass production to intra-annual time scales. They also suggest that these two growth processes exhibit differential sensitivities to local environmental conditions. Indeed, in the well-watered French sites the seasonal dynamics of stem-girth increase matched the photoperiod cycle, whereas those of woody biomass production closely followed the seasonal course of temperature. We suggest that forecasted changes in the annual cycle of climatic factors may shift the phase timing of stem size increase and woody biomass production in the future
Possibilities for Chemical Conversion of Beech Wood
No full textThis article presents chemical composition of beech wood as well as various possibilities for its chemical conversion. The useful components of beech biomass are primarily cellulose fibers, xylan and lignin. Some of the most important technological procedures for wood fractionation are described, as for example hydrolysis, fermentation, pyrolysis and extraction, together with marketable products which are produced in the processes. The greatest potential for the future is ascribed to the production of nanofibrilated cellulose, which is considered to become the raw material of the future. Recent research has indicated that beech wood and bark contain high added value bioactive compounds, while seeds are extremely reach source of high quality oil. Beech wood, including waste such as bark and sawdust, represent reach raw material which might be conveniently converted to different marketable products
IFSA Winter Meeting 2015: day at the Slovenian Forestry Institute: implementation and the results of the workshop at Slovenian Forestry Institute
Full text linkDrugo vmesno poročilo projekta ID:WOOD SEE/D/0227/1.2/X: perioda 1. 4. 2013 - 30. 6. 2013 : clustering knowledge, innovation and design in the SEE WOOD sector
Full text linkVpliv žledoloma na rast populacije šesterozobega in osmerozobega lubadarja v okolici Domžal v 2014 : raziskovalna naloga
Full text linkCharacteristics and geographical distribution of fiddleback figure in wood of Acer pseudoplatanus L. in Slovenia
No full textThe wavy grain of wood expressed in fiddleback figure usually enhances its commercial value. The goal of this study was to analyse fiddleback figure and other log characteristics in sycamore maple (Acer pseudoplatanus L.) and their contribution to the price of the timber. We studied sycamore maple logs at the annual auction of the highest quality wood assortments in Slovenj Gradec, Slovenia. Measurements were performed on the logs and wavy grain was analysed in 2013. In addition, data were used on logs auctioned between 2007 and 2012. Using the data collected at the auction in 2013 and a binary logistic regression model, the original sample was expanded considerably. The percentage of fi ddleback maple was 7.4 % at the auction in 2013. Larger volume of maple logs was on average linked to higher price; however, the presence of fiddleback figure in a log per se did not guarantee above average price. Prices of more than half of the fiddleback figured maple logs at the auction in 2013 were below average. On the other hand, large fiddleback logs achieved the highest prices. Trees with fiddleback figure proved to be evenly distributed throughout the entire population of sycamore maple in Slovenia. The geographic origin of sycamore maple did not influence the occurrence of fiddleback figure. The presented results appear to be representative of the occurrence of fiddleback figure in Acer pseudoplatanus throughout its entire distribution range