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Fig. 4


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Diurnal changes in planktonic copepod biomass (fresh weight = FW) in lake Syczyńskie in August 2006 and 2007 (sampling points abbreviations as in Fig. 1; asterisks show statistical significance in differences as compared to previous hour, *p < 0.05, **p < 0.01; SD = standard deviation, samples marked with the same letters are not significantly different − results of Tukey's post hoc test).

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