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vol. 1, nr. 3 (2003)
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Structure of the biocenosis in three Polesie Lubelskie region (Eastern Poland) shallow lakes of different trophy
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Stanisław Radwan1, Wojciech Płaska1, Joanna Sender1, Wojciech Zwolski1, Władysława Wojciechowska2
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1 Department of Hydrobiology and Ichthyobiology, University of Agriculture, Akademicka str. 13, 20-950 Lublin |
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2 Department of Hydrobiology and Botany, Catholic University in Lublin, Norwida str. 4, 20-950 Lublin |
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vol. 1 (2003), nr. 3,
pp. 501-512
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abstract:
The structure of phytoplankton, emergent macrophytes, zooplankton (Rotifera, Cladocera, Copepoda) and zoobenthos was studied in three trophically different shallow lakes: slightly eutrophic Lake Uściwierz, eutrophic Lake Rotcze, dystrophic Lake Moszne, located in the Polesie Lubelskie Region (eastern Poland). The samples were collected in 2000 and 2001. 69 species of algae were found in the investigated lakes. The highest number of species - 38 occurred in the eutrophic lake, while the lowest - 22 species in the dystrophic lake. However, in the dystrophic lake the density of phytoplankton was the highest (1485 ind. ml-1) and the lowest in the eutrophic lake (208 ind. ml-1). The largest number of species of emergent macrophytes was found in the slightly eutrophic lake - 6, and the lowest in the eutrophic lake - 2. Phragmitetum was a dominant plant community in every lake. Zooplankton and zoobenthos reached the highest diversity in the eutrophic lake � 46 species of zooplankton and 30 taxa of zoobenthos, and the lowest in the dystrophic lake � 24 species of zooplankton and 6 taxa of zoobenthos. The highest density of zoobenthos was found in the slightly eutrophic lake and achieved 1786 ind. m-2, and the lowest in the dystrophic lake (467 ind. m-2). Zooplankton density was clearly differentiated in investigated lakes. The highest density of Rotatoria (1279 ind. l-1) was found in the dystrophic lake, and Cladocera and Copepoda in the eutrophic lake (398 ind. l-1). The lowest density of Rotatoria occurred in the slightly eutrophic lake (53 ind. l-1) and crustacean plankton in the dystrophic lake (41 ind. l-1).
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keywords:
shallow lakes, emergent macrophytes, phytoplankton, zooplankton, zoobenthos
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original in:
English
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