This paper reports on studies conducted during 2005 in the ecosystem of the Solina–Myczkowce mountain complex of mesotrophic reservoirs on the San River, SE Poland. Of the 1,950 t of dissolved silica calculated to flow into the reservoirs in the course of the year, c. 20% of the load was retained in the reservoirs. However, most of this retention took place in the lower Myczkowce Reservoir. Far-reaching depletion to below 10 μM L−1 of silicate was noted during the summer in the epilimnetic waters of the two reservoirs. In turn, the hypolimnion was seen to go through an enrichment process connected with sedimentation and releases from sediment. The observed depletion causes a decrease in the DSi:DIP ratio in the euphotic zone of the reservoirs, with simultaneous growth of non-siliceous algae expressed as chl a concentration.
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The research gained financial support from Poland’s Ministry of Science, via grant no. 2 PO4G 0842.
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Koszelnik, P., Tomaszek, J.A. Dissolved Silica Retention and Its Impact on Eutrophication in a Complex of Mountain Reservoirs. Water Air Soil Pollut 189, 189–198 (2008). https://doi.org/10.1007/s11270-007-9567-x