Abstract:
Lichen have been widely used as bioindicator of air quality. The aims of this
study were to know the relationship between certain lichen with traffic volume
and influence of traffic volume to lichen diversity and accumulation of Pb and Cr
in lichen thalus. There were 20 species from 6 families found from all sampling
sites. The highest traffic volume was observed in Jl. Jend. Sudirman, Jl. Arifin
Ahmad and Jl. Adi Sucipto respectively. Lichen diversity increased with greater
volume of traffic, and was highest at Jl. Adi Sucipto (17 species), Jl. Arifin
Ahmad (12 species) and Jl. Jend. Sudirman (11 species). Dirinaria picta was
found in all sampling sites and has the highest presence percentage among the
observed lichens. The highest accumulation of Pb (4.48±0.18 ppm ) and Cr
(1.00 ±0.14 ppm) in D. picta thalus was found at Jl. Jend. Sudirman. The lowest
accumulation of Pb (2.03±0.03 ppm) and Cr (0.61±0.13 ppm) in D. picta thalus
was found at Jl. Adi. Sucipto. The analysis of Spearmans correlation showed the
positive correlation between traffic volume and accumulation of Pb and Cr on
lichen thalus at Jl. Jend. Sudirman and Jl. Arifin Ahmad, while negative
correlation was shown at Jl. Adi Sucipto. Spearman’s correlation showed negative
correlatiom for traffic volume and accumulation of Cr in lichen thalus in all
sampling sites.
