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Hepatotoxic cyanobacteria in the shallow lake Müggelsee

  • Martin Welker
  • Sigrid Hoeg
  • Christian Steinberg
Chapter
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Part of the Developments in Hydrobiology book series (DIHY, volume 143)

Abstract

Since 1996 we have studied the occurrence of cyanobacterial hepatotoxins, microcystins (Mcyst), in the shallow lake Müggelsee. Intracellular (cell-bound) Mcyst’s were detectable from late summer to autumn in 2 years, and maximum concentrations of about 3 μg/1 of total cell-bound Mcyst were measured. The concentration of Mcyst’s was correlated to the biovolume of Microcystis sp. (R 2=0.560 in 1996 and R 2=0.483 in 1997; P <0.001). Between years, the ratio of Mcyst’ss per biovolume of Microcystis differed significantly (P <0,001; 0.913 μg/mm3 in 1996 and 0.171 μg/mm3 in 1997). The ratio of the detected Mcyst variants, Mcyst-LR and Mcyst-RR, was constant in all samples with Mcyst-LR:Mcyst-RR ≈ 1:2.9. One out of 22 strains of Microcystis sp. we isolated in 1997 contained Mcyst-LR and Mcyst-RR at a ratio of Mcyst-LR:Mcyst-RR=1:1.6. The Mcyst’ss found in lake samples were likely to have been produced by a number of a few strains that were present in the lake for extended periods of time in both years.

Key words

cyanobacteria Microcystis sp. Aphanizomenon sp. microcystin 

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Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • Martin Welker
    • 1
  • Sigrid Hoeg
    • 1
  • Christian Steinberg
    • 1
  1. 1.Institut für Gewässerökologie und Binnenfischerei (IGB)BerlinGermany

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