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Annual dynamics and production of rotifers in an eutrophication gradient in the Baltic Sea

  • Sif Johansson
Conference paper
Part of the Developments in Hydrobiology book series (DIHY, volume 14)

Abstract

Spatial and temporal fluctuations in rotifer abundance have been monitored along a trophic gradient in the northern Baltic. The most common rotifer was Synchaeta spp., which had one abundance peak in June and one in September–October. Only during the latter period was the abundance significantly higher in the eutrophic basin compared to the reference area. The annual production of Synchaeta spp. was about double in the eutrophic basin. A positive correlation between Synchaeta spp. biomass and phytoplankton biomass was obtained during the autumn, but not during the early summer peak, although the phytoplankton community was dominated by the same species. Keratella quadrata, K. cochlearis and K. cruciformis were most abundant in August–September, and all three species had increased abundance in the eutrophic basin.

Keywords

rotifers annual fluctuation eutrophication 

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Copyright information

© Dr W. Junk Publishers, The Hague 1983

Authors and Affiliations

  • Sif Johansson
    • 1
  1. 1.Askö Laboratory, Institute of Marine EcologyUniversity of StockholmStockholmSweden

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