University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Sigrun Dietrich
(2023):
Vegetationskundliche Erfassung von Regenrückhaltebecken im Tullnerfeld (NÖ).
Master / Diploma Thesis - Institut für Botanik (Botany),
BOKU-Universität für Bodenkultur,
pp 107.
UB BOKU
obvsg
- Abstract:
- The secondary drainage ponds in Tullnerfeld, which were created during the expansion of the ÖBB western railway track, were mapped for vegetation in 2019. These habitats are subject to great dynamics due to fluctuating water levels, which is why the drainage ponds were mapped again in the vegetation period of 2021. The question was investigated to what extent vegetation changes had occurred over two years. By means of phytosociological surveys from May to August 2021, the species inventory was examined regarding plant communities, new species, Red List species and neophytes. Subsequently, vegetation dynamic analyses were carried out to show changes in the plant population. With respect to plant communities, there is a tendency towards an increase in reed and associated terrestrial species. The examination of the mean indicator values showed that there are no significant differences between the recording years 2019 and 2021. Furthermore, the number of permanently water-bearing drainage ponds has decreased. With the help of a canonical correspondence analysis, the water level was identified as the environmental variable with the greatest explanatory value for the variation in species composition. In addition, it was possible to investigate which species were deliberately planted at the beginning of the construction of the drainage ponds and which have settled by themselves. Based on the results, it can be said that only minor changes took place between 2019 and 2021, which are referred to as vegetation fluctuations. If we now look at the period from the greening of the drainage ponds (2003-2007) to the time of the mapping of 2021, a far more drastic transformation of the vegetation cover is evident. Due to their different characteristics, the secondary drainage ponds in Tullnerfeld represent valuable habitats and important retreat areas for many species.
- Beurteilende*r: Bernhardt Karl Georg