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Research project (§ 26 & § 27)
Duration : 2017-03-01 - 2018-12-31

The von Bertalanffy equation was developed in the 1940s and has since been the almost universal biologically motivated model to describe the ontogenetic growth of different species; it is characterized by the metabolic exponents a = 2/3, b = 1. West et al. (1997, 2001) suggested another pair of metabolic exponents (a = 2/3, b = 1) and provided biological reasoning for this choice. This project proposes biological reasoning for yet two other exponent pairs based on the ideas of Bertalanffy and West about metabolism and on a model of Parks (1982) about the dependency of growth on food intake.
Research project (§ 26 & § 27)
Duration : 2019-03-01 - 2021-02-28

Vienna is not only the capital of nearly two million inhabitants but also a hotspot of biodiversity. Thereby urban green areas and their management are highly relevant. The public transport operator Wiener Linien, is in charge of large areas along the traffic routes, which may be important as habitat and migration corridor for numerous plants and animals. Therefore, the question arises which diversity can be observed on those areas referring to the indicator groups plants, wild bees, butterflies and grasshoppers and how can the management of these areas be improved. To answer these questions the species composition of 20 sampling sites will be recorded and analysed. A set of measures for an optimized management of these areas will be developed along with stakeholders involved in the implementation.
Research project (§ 26 & § 27)
Duration : 2020-01-01 - 2022-12-31

Restoration of abandoned grassland is an important aspect of sustainable resource investment in conservation areas. Success of restoration varies with the degree and duration of former abandonment as well as with environmental conditions. We use permanent plots on grassland associations that differ in just these aspects and follow the annual changes in plant species comopistion. Such we can make assumptions about the time needed to gain a desired compositional condition of the respective grassland communities.

Supervised Theses and Dissertations