1. Institute of Geological Sciences, University of Wrocław, Wroclaw, Poland
2. Department of Environmental Protection, Wroclaw University of Science and Technology, Wroclaw, Poland
3. Institute of Biology, Division of Environmental Biology, Jan Kochanowski University in Kielce, Kielce, Poland
4. Department of Earth and Atmospheric Sciences, GEOTOP/UQAM, Montréal, Canada