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Gewählte Master / Diploma Thesis:

Julia Virgolini (2020): Diversität und Ökologie von spontanem Vegetationsaufkommen auf Kiesdächern in Wien.
Master / Diploma Thesis - Institut für Botanik (Botany), BOKU-Universität für Bodenkultur, pp 80. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Abstract:
What grows on flat gravel roofs of Vienna? Even though green roofs are very popular these days, only little attention is given to urban spontaneous vegetation growing on flat gravel roofs (FGR). There are only few studies from the last century concerning FGR vegetation and they strongly differ in both quality and amount of research. Cities are recognised as biodiversity hotspots, but flat gravel roofs are rarely included in vegetation records and are therefore an underexplored plant habitat. In 2017, a total of 72 FGR, differing in age, site, height and management were examined in Vienna. On the observed roofs ranging from one to over a hundred years old, a very heterogenous vegetation was detected. This master thesis documents the current vegetation found on the observed FGR in Vienna. In addition, the influencing factors regarding the quality and quantity of vegetation appearance will be analysed. In total 217 different species out of 54 plant families were found, which accounts for up to 10 % of Vienna’s wild flora. Two thirds were native species with some plants being on the Austrian red list. Also alien species and invasive species could be found. About 70% of the recorded vegetation were therophytes and hemikryptophytes. Most of the woody plants growing on Vienna’s FGR do not make it further than a juvenile stage. Correlation analyses showed that age along with substrate depth have the highest impact on phytodiversity in this extreme urban environment. Furthermore, the management intensity highly affects the vegetation occurrence on FGR and therefore provides a basis of recommendation for promoting these valuable ecological wild greens.

Beurteilende(r): Bernhardt Karl Georg
1.Mitwirkender: Lapin Katharina

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