Study on the Effect of Monochromatic Light on the Growth of the Red Tide Diatom Skeletonema Costatum

Hongli Miao, Lina Sun, Qingzhen Tian, Shanshan Wang, Jing Wang

College of information science and engineering, Ocean University of China, Laoshan District, Qingdao, Shandong, China.

DOI: 10.4236/opj.2012.23022                

Abstract

Effects of light intensity and quality of three kinds of LED monochromatic lights (blue, green, and red) on the growth of Skeletonema costatum are investigated in batch culture conditions. Seven light intensities (20, 30, 40, 45, 50, 60 and 80 μmol·m^-2·s^-1) are used to evaluate the specific growth rate, spectrum absorption coefficient and saturated light intensity of LED monochromatic light. Results show that the growth rates of Skeletonema costatum increase with the enhanced light intensity; however, the light level beyond the saturation light intensity inhibited the growth of Skeletonema costatum. Compared with red and green light, the growth rate of Skeletonema costatum under blue light is higher within saturated light intensity, and saturated light intensity of LED monochromatic light is lower under blue light and higher under green light. It is concluded that under different monochromatic light, the saturated light intensity decreases and the growth rate increases with the increasing of spectrum absorption coefficient.

Keywords

Monochromatic Light; Saturated Light Intensity; Skeletonema Costatum; Growth Rate; Red Tide

Conflicts of Interest

The authors declare no conflicts of interest.

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