Comparison of diatom communities at the natural and anthropogenic character stations in the littoral zone of the urban lake Jeziorak mały
2010
Zębek, E., University of Warmia and Mazury in Olsztyn, Olsztyn (Poland)
Net phytoplankton at the natural and anthropogenic character stations in the littoral zone of the urban lake Jeziorak Mały (Mazurian Lakeland) were studied between April and October of 2002 and 2003. The relationships between selected physicochemical water parameters and numbers of diatoms, coefficients of similarity, dominant taxa and species diversity were analyzed. The anthropogenic stations, separators (A) and the stations with stony-gravel substrates (B), had higher trophy than the natural stations overgrown by vascular plants (C). At stations A and B, the high orthophosphate, silicon and calcium concentrations favored an increase in the abundance, biomass and species diversity of the diatoms. However at stations C, the high water temperature and low oxygen content could limit the development of diatoms. The largest differentiation (the lowest coefficient of similarity) of their species composition recorded between the stations A and B, which result in the plant periphyton might influence the diatom community.
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