Abstract
The abundance, biovolume and seasonal patterns of autotrophic picoplankton and larger phytoplankton were studied in 1993 in the shallow, dystrophic Lake Flosek and in the epilimnion of up to 5 m in two non-dystrophic, deep lakes: mesotrophic Lake Majcz and eutrophic Lake Mikotajskie. In all the three lakes picoplankton exhibited well visible seasonal patterns. In non-dystrophic lakes spring/early summer abundance peaks were observed while in Lake Flosek two abundance peaks occurred: a smaller one in spring and second, bigger, in autumn.
It was noticed that maximal picoplankton abundances did not coincided with abundance peaks of larger phytoplankton. The share of picoplankton in the total phytoplankton community in two less productive lakes (Flosek and Majcz) varied between 7 and 24% during picoplankton abundance peaks and about 5% during the rest of the vegetation season. In Lake Mikolajskie picoplankton’s share was noticeable only during the abundance peak (13–6%) while it was insignificant (about 1% of the total phytoplankton biovolume) during the rest of the season.
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Jasser, I. (1997). The dynamics and importance of picoplankton in shallow, dystrophic lake in comparison with surface waters of two deep lakes with contrasting trophic status. In: Kufel, L., Prejs, A., Rybak, J.I. (eds) Shallow Lakes ’95. Developments in Hydrobiology, vol 119. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5648-6_10
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DOI: https://doi.org/10.1007/978-94-011-5648-6_10
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