Situation of natural forest renewal on clearing corridors and in conversion stocks (National Park Gesäuse: Gstatterbodener boiler, in tube)

The focus of this thesis is on the representation of the rejuvenation ratios of selected areas in the northeastern part of the Gesäuse National Park (in the pipe, Gstatterbodener Kessel). Due to particularly intensive historical use, the area is to be mentioned as a problem area with regard to natural forest renewal. 17 vegetation images of forest clearing corridors allow a clear floristic differentiation of deep to medium-mountain outdoor vegetation on forest sites. In doing so, the same local characteristics as in the plant sociological classification of forest societies are striking. It can be distinguished from the facies of a spruce-tannenwald site, from clay spruce-tannen-beech forest sites (Cardamino-trifoliae-Fagetum) and from Carbonatschutt Fichten-Tannen-Buchenwalden (Helleboro nigri-Fagetum). The denser herb layer of the sites with a clay top layer proves to be particularly obstructive to the apparition of trees. Furthermore, surveys were carried out in conversion forest areas. Conversion stock 1 represents an old spruce stock with existing rejuvenation, which has been further cleared to strengthen the woods of the herb layer in its growth. Conversion stock 2 is a spruce pole wood. Here, a large part of the spruce was cut while protecting all mixed hardwood individuals. The resulting crown and branch material should provide a bite protection for existing hardwood rejuvenation at least in the first months after the procedure. Spruce dominates in the study area in the tree layer to a very special extent. Many stocks lack hardwood seed trees completely. The potentially natural main tree species fir is also largely absent from the two study areas. In the course of the studies, the influence of a near (about 30 m) seed tree turns out to be particularly significant. In a near mother tree, there are consistently high numbers of individuals for beech, mountain maple or ash in the herb layer. However, these individuals are also subject to very strong bites throughout, which makes height growth through accessibility by the aeses of deer and deer normally impossible. Since spruce is usually little to not bite, it gains dominance in the shrub layer. While the enrichment with hardwood in the course of forest renewal is slightly higher than in the old populations, the dominance of spruce is problematic. The fact is that the potentially natural forest society, a spruce-tap beech forest, is not achievable in the coming forest generation in the majority of the two research areas. But it is precisely the results of this thesis regarding the strong adhesion in the surrounding of existing mother trees that show how important a higher proportion of hardwood would be in the current shrub layer. In the case of fructification of future holdings enriched with hardwood at least throughout, hardwood rejuvenation would increase exponentially. In the subsequent herds (with improved tree species mixture) to rely on comprehensive hardwood rejuvenation, so that due to the high number of rejuvenation individuals some of the shell deer are overlooked again and again, in the end it seems to me to be the best and easiest way to reduce the influence due to selective bite in the distant future. Currently, measures are undoubtedly recommended for the research areas to increase the proportion of fir, beech, mountain maple, ash and ash in the emerging forest generation. The planting of fir (drawn from autochthonous seeds) is already a concrete management goal. A further reduction of the shell deer density to alleviate the bite pressure should be sought in any case. However, with regard to areas particularly cleared by semen trees, be questioned whether it is realistic, the shell game stands so far