Modelling of growth of Porphyridium cruentum in connection with two interdependent factors: Light and temperature

Abstract Starting from results obtained at the laboratory scale on Porphyridium cruentum cultures under non-limited nutrient conditions, equations have been developed which allow of the estimation of the algal growth-rate according to variations of temperature and light intensity. These two factors, which are generally considered as being independents, are in fact closely related. At least two of the coefficients that determine the growth-rate response to the light intensity may be expressed as a function of temperature. The growth model established allows estimation of the growth rate of Porphyridium cruentum within the ranges of temperature 5–35°C and light intensities 0 to 1100 μmol photons m −2 s −1 .

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