122
and 12, whose IAP values vary from 48 to 50. The third formed subzone (А 3 ) is
characterized by five investigated points – 4, 5, 6, 8, and 52. It mainly covers the
southeastern part of the area and is of a discontinuous shape, so its fragments are
located in the northwest (point 4). The IAP values of the points located in this subzone vary from 52 to 56.
It should be borne in mind that the zones of lichen indication of different degrees
of air quality are a reflection of its condition in a particular area over a long period
of time (Mayer et al. 2013; Sujetoviene 2015).
Slaby and Lisowska (2012) recorded identical results within their research conducted in Krakow. The subject of their research was the recolonization of epiphytic
lichens in the urban ecosystem as a consequence of air quality improvement. In
Fig. 4.7 Map of the spatial distribution of different zones of air quality in Prolom Spa (A 1 , A 2 , and
A 3 subzones of the “normal” zone)
S. Ristić et al.
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