Study of Chlorophyll-a Distribution of Microalgae at Tasik Aman and Tasik Harapan in Penang Island Malaysia using Landsat Image

Fairooz Johan, Mohd Zubir Mat Jafri, Lim Hwee San, Wan Maznah Wan Omar


Abstract.  Environment study is vitally important in order to understand deeply about flora and fauna living in the Earth. Microalgae species has the uniqueness and specialty dominant producer in most freshwater and marine environment. Thus, microalgae are important as a principal energy base for many aquatic food webs in ecology and also have many benefits in human life such as medicine, cosmetic and food. Generally, chlorophyll-a is the pigment found in all photosynthesis plants including microalgae, and it is a very important as a parameter for estimation of lakes primary productivity in microalgae ecosystem. Chlorophyll of microalgae can be detected by using satellite remote sensing in the form of lakes colour. Variation of lakes colour reveals difference category of microalgae productive areas (i.e. distribution and where microalgae). In this study, satellite remote sensing image and dataset (i.e. Landsat 7) are used to measure the current state of chlorophyll-a distribution of microalgae at Tasik Aman and Tasik Harapan, Universiti Sains Malaysia (USM) in Penang Malaysia with the aid of PCI Geomatica software packaging. The Landsat 7 image and dataset in month May until June 2013 are used. From Landsat 7, its shows the existence of chlorophyll-a concentration of microalgae variability on that period is valid for this area. The result indicated that Landsat 7 approach is suitable used for studying chlorophyll-a concentration in this area but for mapping it is not suitable because Landsat has low resolution.

Keywords: microalgae, chlorophyll-a, remote sensing

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