P. Skrivan et al., FACTORS AFFECTING THE CONTENT OF HEAVY-METALS IN BULK ATMOSPHERIC PRECIPITATION, THROUGHFALL AND STEMFLOW IN CENTRAL BOHEMIA, CZECH-REPUBLIC, Water, air and soil pollution, 85(2), 1995, pp. 841-846
Content of coppers, manganese, lead, and zinc in samples of bulk preci
pitation, throughfall and stem-flow has been studied in a forest area
in central Bohemia. The sampling localities are situated on two types
of bedrock granite and cenomanian sandstones. The content in bulk prec
ipitation reflects the impact of fossil fuel emission sources and the
vehicular sources of lead. The deposition rate of elements in throughf
all, in comparison with that of the deposition on an open land, exhibi
ts increased values in essential microelements (in Mn approx. 45 times
, Zn-5 times, Cu and Cd - 2 times), with significant seasonal fluctuat
ions. The value of the same ratio for ecotoxic lead is 0.23. The enhan
ced flux of elements in throughfall is ascribed mainly to the metaboli
c processes of the trees. Differences in the chemical composition of t
hroughfall and stemflow collected on stands with different kind of bed
rock are ascribed to various degree of accessibility of the micronutri
ents and various intensity of their vegetation uptake.