The goal of conference was to stress the issues with large scale damages after disturbances and present improvements for mitigating damages caused after these events. Options for improvement in the field of organization of work after the disturbance, technical part of restoration (logging) and biological part of restoration (artificial and natural regeneration) ere presented.
C.06 Editorial board membershipCOBISS.SI-ID: 3477926
In 2006 a hurricane blew down 125 ha of mostly mature even-aged spruce stands on the Jelovica plateau. Two post-windthrow inventories of regeneration were executed two and five years after the windthrow. Presence, abundance and composition of natural regeneration were surveyed on 81 plots of 16 m2 each. The proportion of plots without natural regeneration decreased from 30 % in 2008 to 11 % in 2011. The average abundance of regeneration was 7,955 individuals per hectare in 2008 and 9,660 individuals per hectare in 2011. In tree species composition spruce predominated with 46 %, but the proportion of broad leaves increased substantially in the observation period. Additionally, the impact of site and stand factors on regeneration was examined; influential factors of natural regeneration occurrence were investigated using a binary logistic regression, while influential factors of changes in regeneration density were examined using a generalized linear regression model. Among many influential factors, the analyses exposed the distance to the nearest stand, aspect/sun exposure, and the portion of leaf-litter on a plot.
F.17 Transfer of existing technologies, know-how, methods and procedures into practiceCOBISS.SI-ID: 3616166
In Central Europe wind was recognized as the main abiotic factor of forest stand dynamics. It mostly causes low-severity disturbances, but also disturbances of moderate severity are frequent, whereas high-severity disturbances are rare. However, one such disturbance happened at the broader area of the mountain pass Črnivec in the year 2008. In the study, Kendall tau-b correlation coefficient and binary logistic regression were used to find out whether the data from permanent sample plots (PSP) can be used to analyze the occurrence of a windthrow on a study site. Various stand and site factors were statistically significantly associated with the damage level in aparticular stand. The highest damage level within the development phases was recorded in mature stands, whereas no damage was documented in regeneration, thicket stage and pole stage stands. Stands with a higher share of conifers were more severely damaged than those with a lower share of conifers. The most severe damages were found in stands with ( 25 % of broadleaves in stand volume, while in stands with the share of broadleaves Ž 75 % no damage was registered. The explanatory model of windthrow occurrence at PSP level included seven variables: altitude, exposition, slope, bedrock type, and stand volume of spruce, fir and beech, respectively. Additionally, the acquired results were discussed and some forest management guidelines were proposed.
F.17 Transfer of existing technologies, know-how, methods and procedures into practiceCOBISS.SI-ID: 3713702
In our research we analyzed the development of forest stands affected by natural disturbance. We focused on the comparison of vegetation development on salvaged (felling and salvage logging were performed) and non-salvaged (felling and salvage logging were not performed) parts of the damaged forest stands. We measured characteristics of the regeneration on 45 plots in seven study sites in S and W Slovenia. The results indicate differences between the both treatments; under certain conditions, doing nothing after a disturbance can represent a better choice for the development of vegetation and prevention of unfavorable biotic and abiotic processes after a natural disturbance.
F.18 Transfer of new know-how to direct users (seminars, fora, conferences)COBISS.SI-ID: 3616422
Windthrow damaged 16.5 ha of deciduous forests in Žagar's gorge (Žagarjev graben), GGE Notranji Bohinj, in 1991. In 1996, sleet damaged another 2.6 ha of these forests. We have presented four facilities according to the renovation process and the care done. We have marked out 101 surfaces (10 x 10 m) altogether. We have registered all trees higher than 20 cm and evaluated their veiling according to the altitude class and tree species. We have also registered general orographic features and distance from the forest edge for every surface. The purpose of the research has been to compare successfulness of natural and artificial renovation and to analyse dependence of young trees density from orographic factors and veiling. We have used Kruskal-Wallis test and Spearman correlation for the data analysis. At naturally renovated facilities, a beech tree predominated (4816 trees/ha in 2929 trees/ha), in artificially renovated facilities, spruce (2971 / treesha) and goat willow (2960 trees/ha), beech tree was on the second place (2044 trees/ha in 2862 trees/ha). Beech tree has been veiling the most of the surface except one facility where pussy willow was more successful. We have discovered different influences of orographic factors, veiling and distance from the forest edge to density. These influences have been different according to individual tree species and facilities. Several exceptional weather events are expected, therefore, we have suggested some guidelines for managing forests in the future.
D.10 Educational activitiesCOBISS.SI-ID: 4007078