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(80-28) Bioconcentration features of mercury in mushrooms in Trojmiejski Landscape Park, Poland. Gucia, Magdalena*,1, Falandysz, Jerzy1, Kawano, Masahide2, Frankowska, Aneta1, Bielawski, Leszek1, 1 Department of Environmental Chemistry and Ecotoxicology,University of Gdansk, 18 Sobieskiego St., Gdansk, Poland2 Department of Environmental Analytical Chemistry, Ehime University, 3-5-7 Tarumi, Matsuyama, Japan ABSTRACT- Mercury was quantified using CV-AAS in the fruiting bodies of 9 edible and 5 inedible species of higher mushrooms and underlying soil substrate collected in 1996 at the area of Trojmiejski Landscape Park in northern part of Poland. In total 204 samples separately of the caps and stalks and 102 samples of soil substrate (0-10 cm layer) were examined. The mercury content of underlying soil substrate to 14 mushroom species varied between 5.2±2.6 and 890±530 ng/g dry wt (total range between 2.3 and 1700). Amongst of the edible species Agaric (Agaricus arvensis), Brown Birch Scaber Stalk (Leccinum scabrum), Parasol Mushroom (Macrolepiota procera), King Bolete (Boletus edulis) and Yellow-cracking Bolete (Xerocomus subtomentosus) contained elevated mercury concentrations ranging between 1600±930 and 6800±4000 ng/g dry wt. in the caps, and their stalk concentrations were 2.6±1.1 to 1.7±1.0 times smaller, respectively. Some of the mushroom species investigated had evidently higher mercury levels when compared to the background sites elsewhere in northern part of Poland. The values of the bioconcentration factor (BCF) of mercury in the caps of a such species as A. arvensis, Parasol Mushroom and Brown Birch scaber Stalk were between 150±58 and 230±150, resp., and for inedible Claviata excipulformis was 910±330. Linear regression coefficients of the Hg caps and stalks to Hg soil concentrations showed positive relationship for A. arvensis and Brown Birch scaber Stalk (p<0.05) and negative for the caps of (Amanita phalloides) and (Lactarius torminosus) (p>0.05), while for other species no clear trend was found. Key words: mercury, mushrooms , accumulation, pollution |
