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Gewählte Master / Diploma Thesis:

Gabriele Wolfslehner (2011): Einfluss von Licht auf die Verjüngungsentwicklung von Buche (Fagus sylvatica L.), Traubeneiche (Quercus petraea LIEBL.) und Bergahorn (Acer pseudoplatanus L.).
Master / Diploma Thesis - Institut für Waldbau (WALDBAU), BOKU-Universität für Bodenkultur, pp 147. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
The influence of light on the regeneration of European beech, sycamore maple and sessile oak was studied in the Vienna forest. In order to characterize radiation reaching the saplings, hemispherical photographs were taken in forest stands of varying species composition and management regimes. Natural regeneration and species composition were examined at the sites where hemispherical photos were taken. The investigation revealed a significant correlation between relative radiation and basal area of regeneration at a stem height of 10 cm. The results indicated only a minor relationship between light and annual height increment of beech saplings, whereas saplings of oak and maple increased their annual length when exposed to more light. Annual length growth of beech and oak was highly related to tree height, whereas maple saplings showed large variation in length growth. In the present study, the specific leaf area of all tree species increased with decreasing radiation. However, greatest plasticity in terms of leaf area and light exposure was observed for beech. The analysis leads to the conclusion that interspecific competition will mainly affect regeneration processes. The dominance of maple in a mixed-species broadleaved stand will probably be replaced by beech whereas, in the near future, the percentage of maple will basically depend on canopy openings. In sessile oak dominated forests, regeneration of oak has proven to be dominant in quantity but not in height development. Therefore, sessile oak forests of high quality can only be achieved by constant management. In this context, intensive opening of canopy appears necessary to encourage height growth of young oaks.

Beurteilende(r): Hochbichler Eduard

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