Presence of potential toxin-producing cyanobacteria in an oligo-mesotrophic lake in Baltic lake district, Germany: An ecological, Genetic and toxicological survey

Pawan K. Dadheech, Géza B. Selmeczy, Gábor Vasas, Judit Padisák, Wolfgang Arp, Kálmán Tapolczai, Peter Casper, Lothar Krienitz

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Massive developments of potentially toxic cyanobacteria in Lake Stechlin, an oligo-mesotrophic lake in the Baltic Lake District of Germany raised concerns about toxic contamination of these important ecosystems. Field samples in the phase of mass developments of cyanobacteria were used for genetic and toxicological analyses. Microcystins and microcystin genes were detected in field samples of the lake for the first time. However, the toxins were not produced by the dominant taxa (Dolichospermum circinale and Aphanizomenon flos-aquae) but by taxa, which were present only in low biomass in the samples (Microcystis cf. aeruginosa and Planktothrix rubescens). The phytoplankton successions during the study period revealed an increase of cyanobacterial populations. The findings contribute to the changes that have been investigated in Lake Stechlin since the mid-1990s. The possible reasons behind these developments may be climate change, special weather conditions and an increased nutrient pool.

Original languageEnglish
Pages (from-to)2912-2931
Number of pages20
JournalToxins
Volume6
Issue number10
DOIs
Publication statusPublished - 2014

Keywords

  • Aphanizomenon
  • Cyanotoxins
  • Dolichospermum
  • Lake Stechlin
  • Microcystin
  • Microcystis
  • Planktothrix

ASJC Scopus subject areas

  • Toxicology
  • Health, Toxicology and Mutagenesis

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