Concentrations of trace metals in dominant aquatic plants of the Lake Provala (Vojvodina, Yugoslavia)

The trace metal (Fe, Mn, Zn, Cu, Ni, Pb, Cd, Sr, and Cr) contents in the mo st common submerged and floating aquatic plants Ceratophyllum demersum L., Myriophyllum spicatum I,., and Nymphoides flava Hill. of Provala Lake were evaluated. Considerable higher contents of iron, manganese, zinc, nickel, l ead and strontium were found in submerged species than in the floating ones . The presence of cadmium and lead in plant tissues points to a certain deg ree of lake water pollution.