In this paper, the problems in measuring the absorption spectra of benthic diatom were considered.When measuring the spectra of cultures of benthic microalgae, there are errors associated with light scattering and associated with the subsidence of cells. It is shown that the use of portable spectrophotometers when orienting the optical path in a vertical position does not affect the measurement of absorption spectra in the PAR region. It is reported that it is necessary to take into account the fluorescence spectra of the culture due to the presence of a large proportion of fluorescence in the red region.
Cylindrotheca closterium, microalgae, benthic diatoms, diatom Cylindrotheca closterium
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