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vol. 7, nr. 2 (2006)
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Diatom monitoring of inland dune lake sediments in Puszcza Notecka Lakes (North Wielkopolska)
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Beata Messyasz, Maciej G±bka
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Department of Hydrobiology, Adam Mickiewicz University, ul. Umultowska 89, 61-614 Poznań, Poland |
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vol. 7 (2006), nr. 2,
pp. 439-445
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abstract:
Analysis of diatom assemblages was carried out in the surface sediment in both the midlake and the littoral zone of 8 dystrophic lakes from the Puszcza Notecka area. The species composition and density of diatoms were estimated. Moreover, physicochemical analysis in all samples was conducted. The sediment of each lake was characterised by a low pH, small amounts of calcium and organic matter. Among the 145 taxa identified, the most characteristic species of cosmopolitic diatoms were: Cymbella minuta, Cyclotella radiosa, Navicula radiosa, Gomphonema acuminatum. Furthermore, taxa like Achnanthes spp., Eunotia spp., Anomoeoneis spp., Frustularia rhomboides were used as indicators of acidity. More eutrophic conditions in the littoral zone as compared to the midlake part were evident.
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keywords:
diatoms, sediment, taxon ecology, humic lakes, chemistry of sediment
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original in:
Polish
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