Korelasi Kepadatan Lalu Lintas dengan Kadar Timbal (Pb) dan Klorofil Talus Liken di Patumbak, Deli Serdang

Nadia Rouli Sinaga; Ashar Hasairin

doi:10.36312/biocaster.v6i4.1651

Authors

Nadia Rouli Sinaga Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan, Jalan William Iskandar Ps. V, Deli Serdang, Sumatera Utara 20221, Indonesia
Ashar Hasairin Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan, Jalan William Iskandar Ps. V, Deli Serdang, Sumatera Utara 20221, Indonesia

DOI:

https://doi.org/10.36312/biocaster.v6i4.1651

Keywords:

Traffic Density, Chlorophyll, Lichens, Parmotrema perlatum, Lead (Pb)

Abstract

This study aimed to analyze the relationship between traffic density and both lead (Pb) levels and chlorophyll content in the lichen thallus growing on mango trees (Mangifera indica) in the Patumbak Industrial Area, Deli Serdang Regency. The study employed a quantitative method with a descriptive-correlational approach. Lead (Pb) levels were analyzed using an Atomic Absorption Spectrophotometer (AAS), while chlorophyll content was analyzed using a spectrophotometer. The relationship between variables was analyzed using the Spearman correlation test. The results showed that the lichen species found at all study sites was Parmotrema perlatum. Spearman correlation analysis indicated that traffic density did not have a significant relationship with lead (Pb) levels in the lichen thallus (rs = 0.105; p = 0.787), but it did have a strong, significant negative relationship with chlorophyll content (rs = -0.791; p = 0.011). Based on these findings, it can be concluded that traffic density is not significantly related to lead (Pb) levels but is significantly and negatively related to chlorophyll content in the lichen thallus; the higher the traffic density, the lower the chlorophyll content in the lichen thallus. The study identified Parmotrema perlatum as the lichen species present at all designated observation points across the study sites.

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