Keywords:
Chlorella vulgaris, light intensity, algal growth, photosynthesis, biomass productivity, photoinhibition
Abstract
Light intensity impacts algal growth by regulating the availability of energy for photosynthesis. But increased light does not automatically result in proportional growth due to limitations like photosynthetic saturation, self-shading, and over-lighting. This study will explore the effects of light intensity on the growth of Chlorella vulgaris, a freshwater microalga, through controlled experiments and relevant literature. The data used here is simulated and needs to be replaced with actual experimental data prior to publication as empirical research. Five levels of photosynthetic photon flux density of 25, 50, 100, 200, and 400 μmol photons m⁻² s⁻¹ will be compared for 12 days with four independent culture flasks for each treatment. The initial biomass concentration of 0.100 g L⁻¹ is kept constant. In the simulated dataset, biomass at the end of experiment will be found to grow from 0.290 ± 0.026 g L⁻¹ in 25 μmol photons m⁻² s⁻¹ light intensity to 1.010 ± 0.052 g L⁻¹ in 200 μmol photons m⁻² s⁻¹ light intensity, and then reduced to 0.710 ± 0.052 g L⁻¹ in 400 μmol photons m⁻² s⁻¹ light intensity. One way ANOVA will give F(4,15) = 167.47, p < 0.001. The highest biomass productivity will be 0.0758 g L⁻¹ day⁻¹ at 200 μmol photons m⁻² s⁻¹.
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How to cite
Aarthi B Pradhan (2026). Effect of Light Intensity on Growth of Common Algae. International Journal of Research in Humanities and Social Sciences, 14(11), 25-30.
Licence
This article is open access, published under the CC BY 4.0 licence. Copyright remains with the authors.