- Dynamics of the field layer vegetation as related to tree stand dynamics in the Carpathian subalpine spruce forest.

- Interaction between the fruit production of rowan Sorbus aucuparia and the population dynamics of Argyrestia conjugella in the subalpine spruce forest.

- Transport and localization of heavy metals in organs and tissues of hyperaccumulating plants - adaptation to metalliferous sites.

- Examination of natural and anthropogenic factors determining plant species distribution with geostatistical and gradient analysis.

- Impact of burrowing carnivores (badgers and foxes) on plant species diversity and soil properties.

- Influence of soil physicochemical properties and vegetation on soil microorganisms in areas affected by agricultural and industrial activities.

- Heavy metal contamination in Polish National Parks and other areas – assessment of air pollution using moss bioindicators.