A. Cicak et al., Health state of forest tree species and selected groups of fungi and animals in surroundings of a magnesium factory (central Slovakia), EKOL BRATIS, 18(2), 1999, pp. 211-222
Health state of forest tree species and occurrence of selected groups of fu
ngi and animals were investigated in surroundings of a magnesium factory in
three zones of immissions load A, B, C and D (control). The average defoli
ation of oaks and hornbeams in the zone C confirms including these stands i
nto the zone of the chronic damage. A significantly lower degree of damage
was recorded in the zone D. The forest stands in the zones A, B and C suffe
r from lack of mycorrhitic symbionts. This is manifested by their unfavoura
ble health state. The moth larvae occurred on oaks and hornbeams in all zon
es in the latent state. Their abundance in the zones A, B and C was higher
than in the zone D. In ail sampling dates, yearn of investigation and zones
a higher reduction of the leaf area by phyllophagous insects was always re
corded in hornbeams than in oaks. Higher abundance of beetles in the zones
A and B than in C and D can be explicated by their higher concentration on
the remnants of living branches in the basal part of the dying trees. Among
the birds, the highest bioindicative value have the breeding species, in w
hich the species number increases from the zone A to the zone D. In the zon
es A, B and C, the only bird species (Pants major) nested in the nest boxes
.