Effect of temperature on the growth and bromatological composition of four microalgae isolated from coastal environments

Abstract

Temperature is a very important factor for the development of many micro and macroscopic
organisms, including microalgae. This factor is responsible for regulating the synthesis of
multiple macromolecules essential for their growth in natural and controlled environments.
In this study, we evaluated the effect of temperature on the growth and bromatological
composition of four microalgae (Asterionellopsis glacialis, Chaetoceros diversus,
Cryptomonas sp. and Tetraselmis suecica) isolated in coastal environments. The optimal
growth temperature was observed from 20 °C to 28 °C for three of the microalgae studied
and only C. diversus showed tolerance to 30 °C. The highest biomass and protein
concentration were obtained from A. glacialis and C. diversus. Cryptomonas sp. and T.
suecica showed the highest concentrations of carbohydrates, while the highest proportion
of lipids was observed in C. diversus and T. suecica. This work suggests the use of A.
glacialis and C. diversus for controlled cultivation and the obtaining of valuable molecules
with potential biotechnological use.