Characterization of bio-optical properties in coral reef waters of Bidong Island

Abstract

Surface water samples were collected from 11 stations at Bidong Island during August-September 2013 to analyse the total concentration of chlorophyll, suspended particulates, colored dissolve organic matter (CDOM) and spectral absorption coefficient of dissolved and particulate material. Live coral covers were also determined on selected areas. The end of blue spectrum ( 440nm), light absorption by non-phytoplankton materials (CDOM and detritus) accounts for more than 54% of the total non-water absorption. In balance, a minimum of 16% out of total absorption came from phytoplankton components. During the southwest monsoon season, relatively low concentration of total chlorophyll (< 0.164 mg m- 3 ) were observed at outer stations of Bidong Island.