University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Patrick Parigger
(2021):
Analyse der Walddynamik im Naturwaldreservat Niedergailwald, Kärnten.
Master / Diploma Thesis - Institut für Waldbau (WALDBAU),
BOKU-Universität für Bodenkultur,
pp 129.
UB BOKU
obvsg
- Abstract:
- This thesis presents a characterization of the Natural Forest Reserve (NFR) Niedergailwald, situated in the province of Carinthia. The field investigations were carried out in the year 1997 and 2015 with the angle-count method on 14 sample plots in order to analyze the forest dynamics. Seven sample points were added in 2015 to allow a stronger silvicultural characterization of the area. On each sample plot a fixed circular plot of 300 m² was set up to determine detailed information of the stand composition, site and deadwood parameters. Lying deadwood was measured with the line-intersection method. The natural regeneration was investigated on each sample plot on four sub-areas (1 m²). Further, a stereometric evaluation of aerial photographs was done, based on a time series analysis to document the change in the forest structure as well as occurring disturbances. The results indicate an average growing stock in the NFR with 792 ±251 m³/ha, the average number of stems with 1,541 ±964 per hectare and a mean deadwood volume of 34.01 ±30.64 m³/ha. Thus, since the initial field investigation the number of stems per hectare increased by 41.1 %, the basal area and growing stock increased by 55.9 % and 62.9 %, respectively. Regarding the natural forest dynamics the area of the NFR is currently in the optimum stage. The ratio of tree species has shifted in favor of European beech (Fagus sylvatica L.), which is currently the main tree species in Niedergailwald. From the analysis of the aerial photographs it can be concluded, that the area share of the eroded surface is continuously decreasing and occupies currently an area of 19,540.6 m². The comparison of the results from the field investigations in the year 1997 and 2015, as well as the findings of the time series analysis of the aerial photographs allows to draw conclusions on the natural forest dynamics and provides a forecast on the future natural development in the NFR Niedergailwald.
- Beurteilende*r: Vacik Harald