| dc.description.abstract | Accumulation of lead (Pb) on Lichenes thalus influenced by differences in the count
of motor vehicles and physical factors inherent in the garden city of Medan. The aim
of the study is to examine factors affecting the accumulation of lead content (Pb) and
other types Lichenes in Medan city park. This study was conducted in March 2010.
The research location is determined by using purposive sampling method, in the three
parks in the Beringin Park, Ahmad Y ani Park, and Bunga Teladan Park. Lichenes
species diversity existing in the three parks of Medan, consists of three types of tribes
Physciaceae with body type of thalus Cructose are Dirinaria Picta, Dirinaria
aplanata, and Pixine cocoes. At the park's biggest influence is the Beringin Park
motorized pedicab (Betor) with regression equation Y = (-0.059) + 000157x and a
private car with a value of Y = (-0.059) + 0.0009428x, at the Ahmad Yani Park is a
private car with a value of Y = 0.011 + 0.000150lx, and at the Bunga Teladan Park of
motorized pedicab (betor) with a value of Y = (-0.099) + 0.000535x to increment the
accumulated content of Pb in the body thalus Lichenes. Accretion physical
parameters that affect the accumulation of lead (Pb) in Beringin Park regrasi the
temperature with the equation Y = (-0.059) + 0.002x, Ahmad Y ani Park of moisture
with the value Y = 0.011 + 0.0003243x, and light intensity with the value Y = 0.011
+ 0.0009387x, while in Bunga Teladan Park of temperature with the value Y = (-
0.099) + 0.005 x, and humidity, with a value of Y = (-0.099) + 0.0001543 x. | en_US |
