Original paper

The effect of the hydrological regime on primary production in the main stream and the side arms of the River Danube

Ertl, Milan


The effect of the hydrological regime on the production of phytoplankton in the main channel of the River Danube and in the side arms situated in the floodplain was studied during four consecutive years. Negative correlation has been found between annual averages of discharge and primary production. In the side arms the highest production rate of phytoplankton was connected with a slow and constant current. When the arms were stagnant, a decrease of primary production was observed.


phytoplanktonhydrologicalmain channelRiver Danube