Open Journal of Air Pollution

Volume 5, Issue 2 (June 2016)

ISSN Print: 2169-2653   ISSN Online: 2169-2661

Google-based Impact Factor: 0.88  Citations  

Environmental Pollution Bioindication Based on Ficus benjamina L. Leaf Reflectance in the City of Abidjan, Côte d’Ivoire

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DOI: 10.4236/ojap.2016.52006    2,105 Downloads   3,094 Views  


The air in African cities is increasingly polluted mainly due to human activities. A bioindication technical of urban air quality based on active remote sensing might be an alternative to existing physico-chemical methods. Reflectance measurements in the visible spectrum have been carried out at the adaxial and abaxial sides of Ficus benjamina L. leaves in the city of Abidjan, Côte d’Ivoire, with a precision digital camera. Leaves were collected in industrial zones and in parks. The impact of air pollution on leaf physiological as well as structural characteristics in these two contrasts urban environments was determined by Dorsiventral Leaf Reflectance Correlation (DRLC) and dorsiventral leaf reflectance asymmetry quantitatively defined with Normalized Dorsiventral Asymmetry Index (NDAI). Species leaf susceptibility to air pollution from season to season was determined by NDAI seasonal variation. Leaf reflectance measurements allowed the estimation of environmental stress level among industrial areas and parks. NDAI and DLRC were significantly higher in industrial zones compared to parks. NDAI values were found significantly higher for major rainy season compared to major dry season, indicating probably that F. benjamina leaf structure changes were increased from one season to another. Thereby, assessment of urban air quality can be done using leaves reflectance in the visible spectrum.

Cite this paper

Tra Bi, Z. , Barima, Y. , Angaman, D. , Khavanin Zadeh, A. and Traoré, K. (2016) Environmental Pollution Bioindication Based on Ficus benjamina L. Leaf Reflectance in the City of Abidjan, Côte d’Ivoire. Open Journal of Air Pollution, 5, 55-63. doi: 10.4236/ojap.2016.52006.

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