Effects of Hydrological and Physicochemical Factors on Phytoplankton Communities in Floodplain Lakes
Magdalena Grabowska1, Katarzyna Glińska-Lewczuk2, Krystian Obolewski3, Paweł Burandt2, Szymon Kobus2, Julita Dunalska4, Roman Kujawa5, Anna Goździejewska6, Andrzej Skrzypczak6
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1Department of Hydrobiology, Institute of Biology, University of Białystok, Świerkowa 20B, 15-950 Białystok, Poland
2Department of Land Reclamation and Management, University of Warmia and Mazury in Olsztyn,
Plac Łódzki 2, 10-719 Olsztyn, Poland
3Department of Ecology, Pomeranian University in Słupsk, Arciszewskiego 22 b, 76-200 Słupsk, Poland
4Department of Water Protection Engineering, University of Warmia and Mazury in Olsztyn,
Prawochenskiego 1, 10-719 Olsztyn, Poland
5Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn,
M. Oczapowskiego 5, 10-718 Olsztyn, Poland
6Department of Applied Ecology, University of Warmia and Mazury in Olsztyn,
M. Oczapowskiego 5, 10-957 Olsztyn, Poland
Pol. J. Environ. Stud. 2014;23(3):713-725
The fate of phytoplankton communities in different hydrological and hydrochemical conditions was studied in the middle basin of the Biebrza River (NE Poland). Our results showed that hydrological connectivity significantly influenced phytoplankton abundance in floodplain lakes: minimal abundance was stated in lotic and maximal in lentic waterbodies. Phytoplankton diversity and species richness were related to changes in water levels. During the low-water phase, phytoplankton biodiversity was the lowest in lentic and the highest in lotic lakes. High water levels promoted exchanges in species among waterbodies and the river, which increased biodiversity indices. We concluded that the isolation of any floodplain lake from the river channel deteriorates its trophic conditions. Thus, the decrease in phytoplankton biodiversity in floodplain lakes should be regarded as an indirect feedback of the hydrobionts on the hydrological factors.
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