Population biology, ecological topics, and conservation of the flora of Austria

Distribution, vegetation context, and reproductive ecology of two endemic Dianthus species: D. neilreichii and D. blandus.

The impact of the invasive tree Robinia pseudoaccia on dry grasslands in the UNESCO World Heritage Site Wachau.

The plant communities in an oak forest and an oak-hornbeam forest in the border area of the Pannonian climate regarding shifts in their phenology.

The pollination biology in the dimorphic orchid Dactylorhiza sambucina (in co-operation with University of Life Sciences).