Phytoparameters and content of risk elements in Dryopteris dilatata (Hoffm.) A. Gray populations

Abstract

The research plots were established in damaged - by pollutants, fungi and bark beetle, and parallel damaged (control) spruce geobiocoenoses pertaining to company Forest of Spišská Nová Ves city Ltd. (locality Muráň - 1,100 m asl, group of forest types Fageta abietino-piceosa, Skeli-Humic Podzol; locality Hliníky - 950 m asl, group of forest types Abieti-Fageta inferiora, very acid Dystric Cambisol). The higher mean shoot length, weight and energy content were found in populations of Dryopteris dilatata species growing on locality Hliníky and in damaged spruce stand on locality Muráň. On the other hand the higher ash content was in shoots sampled on non-damaged plots. Content of risk elements ranged in following intervals (mg kg-1 of dry matter): Al (88.3-225.0), Pb (2.184-3.340), Ni (0.873-1379), Cr (<0.050-0.220), Cd (0.571-1.918), Hg (0.0312-O.0423). Limit value Hg (0.02 mg kg-1) was exceeded on all studied plots, while the normal value of Al (about 200 mg kg-1) only in case of population growing in damaged stand on locality Hliníky.