Abstract
According to experimental data for two spеcies of diatoms Phaeodactylum tricornutum and Skeletonema costatum, a mathematical description of the combined effect of light and temperature on the change in the intracellular ratio of organic carbon to chlorophyll a was carried out. The equation allows estimating the relative content of chlorophyll in algae in a wide range of temperature and light conditions. According to the results of calculations, the power relationship between temperature and organic carbon and chlorophyll was determined. The highest values of the relative content of chlorophyll were observed at high light intensity and low temperature, the minimum ones were at high temperature and low light intensity. At high density of the light flux, the effect of temperature on the specific content of chlorophyll in algae is more pronounced than at low irradiance.
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