Initial Studies on the Occurrence of Cyanobacteria and Microcystins in Irish Lakes

Karen M. Mooney, John T. G. Hamilton, Stewart D. Floyd, Robert H. Foy, Christopher T. Elliott

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


We report the results of a synoptic survey at 14 sites across the north of Ireland undertaken to determine the occurrence of cyanobacteria and their constituent microcystin cyanotoxins. Seven microcystin toxins were tested for, and five of which were found, with MC-LR, MC-RR, and MC-YR being the most prevalent. Gomphosphaeria spp and Microcystis aeruginosa were the most dominant cyanobacterial species encountered. Together with Aphanizomenon flos-aquae, these were the cyanobacteria associated with the highest microcystin concentrations. The occurrence of several microcystin toxins indicates that there may potentially be more than one cyanobacteria species producing microcystins at many sites. Total microcystin concentrations varied over three orders of magnitude dividing the sites into two groups of high (>1000 ngMC/μgChla, six sites) or low toxicity (<200 ngMC/μgChla, eight sites). © 2010 Wiley Periodicals, Inc. Environ Toxicol, 2010.
Original languageEnglish
Pages (from-to)566-570
Number of pages5
JournalEnvironmental Toxicology
Issue number5
Early online date05 Apr 2010
Publication statusPublished - Oct 2011

ASJC Scopus subject areas

  • Health, Toxicology and Mutagenesis
  • Toxicology
  • Management, Monitoring, Policy and Law


Dive into the research topics of 'Initial Studies on the Occurrence of Cyanobacteria and Microcystins in Irish Lakes'. Together they form a unique fingerprint.

Cite this