The impact of chemical contaminants on biocenosis (ecotoxycological studies) Magdalena Wróbel, Agnieszka Stojanowska, Martyna Nosarzewska, Radosław Rutkowski and Justyna Rybak E3S Web Conf., 100 (2019) 00088 Published online: 10 June 2019 DOI: 10.1051/e3sconf/201910000088