Heavy metal distribution in the ecosystems of the upper course of the Jihlava river
2002
Spurny, P. | Mares, J. | Hedbavny, J. | Sukop, I. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Agronomicka Fakulta)
In October 1999, the concentrations of Hg, Cd, Pb, Cr, Cu, Zn and Ni were monitored in three localities of the upper course of the Jihlava river (Czech Republic). The river water, sediments of the riverbed, zoobenthos samples and body tissues (gills, gonads, skin, dorsal muscles) of the chub (Leuciscus cephalus) were analysed. At the same time the stability of the fish community was evaluated using electrofishing. In spite of the heavy pollution of the investigated river section (particularly with Pb, Cd, Hg, Cr and Cu), concentrations of mercury and lead in muscle tissues of the chubs were relatively low (i.e. 0.139 mg/kg and 0.636 mg/kg, respectively), whereas concentrations of cadmium, lead and zinc in the skin were relatively high (i.e. 0.132 mg/kg, 0.597 mg/kg and 87.30 mg/kg, respectively). Concentrations of cadmium ( 0.162 mg/kg) and lead ( 0.658 mg/kg) were high especially in gonads and concentrations of cadmium ( 0.204 mg/kg), lead ( 0.805 mg/kg) and zinc ( 63.83 mg/kg) were high in the gills. The index of diversity of the fish community was 1.175-1.743, equitability index 0.455-0.486, abundance 1,748.1-6,396.9 fish/ha and biomass 88.2-284.1 kg/ha.
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