The nutrition peculiarities of algae Nitzschia palea (Kutz.) W. Sm. (Bacillariophyta) and Mychonastes homosphaera (Skuja) Kalina et Punc. (Chlorophyta)

The nutrition peculiarities of algae Nitzschia palea (Kütz.) W. Sm. and Mychonastes homosphaera (Skuja) Kalina et Punc. from cyanobacterial-algal cenoses of Propashchaya Yama cave (Republic of Bashkortostan) are considered in the paper. Comparative analysis of these species strains growth in light and in darkness on mineral and organic medium was made. It was revealed, that Nitzschia palea (Kütz.) W. Sm. and Mychonastes homosphaera (Skuja) Kalina et Punc. in light feed on autotrophically, in darkness - heterotrophically.