Periphyton samples were collected from the stones at regular
intervals to compare periphytonic community structure and
to examine its temporal changes. Totally, 28 taxa of periphyton
were collected and identified. Most of the taxa belonged to
Bacillariophyta. In all locations the dominant species were
diatoms Navicula lanceolata, Craticula cuspidata, Amphora ovale.
Seasonal assessment of the distribution of periphyton shows that
in both water bodies more organisms were found in late summer.
The seasonal succession of the periphyton community was more
significant in the Nemunas River.