Authors
Izabela Jabłońska-Barna
Department of Applied Ecology, Faculty of Environmental Sciences and Fisheries, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
Ewa Szarek-Gwiazda
Institute of Nature Conservation, Polish Academy of Sciences, Krakow, Poland
Paraskeva Michailova
Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria