The attempt was made to determine the effect of water flow rate on Zooplankton density, trophic structure and the role of phosphorus regeneration by Zooplankton in phosphorus sedimentation in four impoundments with a water exchange from less than 10 hours to 8-12 days. Formation of stagnant environments together with the increasing time of water exchange in impoundments created good conditions for development of Zooplankton communities. As a result, the rate of phosphorus regeneration was higher and the turnover time of the total and seston phosphorus was shorter in impoundments than in streams above impoundments. A hypothesis that the stations with a long time of water exchange could be a kind of a trap for nutrients excluded from cycling in running waters is validated.

You do not currently have access to this content.