Forests, with a large coverage of lands area, represent important ecosystem.
They have greater ability to absorb atmospheric pollutant, including
radionuclides compared to other vegetation types. Thus it is important to
monitor radionuclides concentration in forest ecosystems. The results of the
first gamma-spectrometric measurements in 16500 ha large region of
South-western Serbia are presented. It is investigated activity
concentrations of 40K, 137Cs and 210Pb in different deciduous and evergreen
trees in the region. For all investigated isotopes, it was observed tendency
that the smallest activity concentrations in average were found in tree
stem, than in leaves, while the highest ones were in soil. Statistical
analysis did not show any differences between activity concentrations of
leaves and needles, showing that both leaves and needles could be equally
well used as a biomonitors.
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