Authors
Bogusław Szulc
Faculty of Biology and Environmental Protection, Enviromental Research Station in Spała, University of Łódź, Spała, Poland
Tomasz Jurczak
Department of Applied Ecology, University of Łódź, Łódź, Poland
Katarzyna Szulc
European Regional Centre for Ecohydrology of the Polish Academy of Sciences, Łódź, Poland
Zbigniew Kaczkowski
Department of Applied Ecology, University of Łódź, Łódź, Poland