The size variability of some Black Sea diatom species
The heterogeneity of cell size spectrum of the culture <i>Ditylum brightwellii</i>, <i>Thalassiosira parva</i>, which were cultivated at the same conditions and <i>Skeletonema costatum</i>, <i>Chaetoceros affinis</i>, which were adapted to the different light conditions was determined. The coefficient of variation of <i>D. brightwellii</i> and <i>Th. parva</i> was 26 and 22 % percent, respectively. The heterogeneity of cell sizes of cultures adapted to different light conditions was varied from 20 to 30% percent, on average. It was established, that light intensity lead to grow in sizes of some diatom species, but the coefficient of variation at high light is smaller.