Blooms of toxic cyanobacterium Nodularia spumigena in Norwegian fjords during Holocene warm periods

Robert Konkel , Anna Toruńska-Sitarz , Marta Cegłowska , Žilvinas Ežerinskis , Justina Šapolaitė , Jonas Mažeika , Hanna Mazur-Marzec


In paleoecological studies, molecular markers are being used increasingly often to reconstruct community structures, environmental conditions and ecosystem changes. In this work, nodularin, anabaenopeptins and selected DNA sequences were applied as Nodularia spumigena markers to reconstruct the history of the cyanobacterium in the Norwegian fjords. For the purpose of this study, three sediment cores collected in Oslofjorden, Trondheimsfjorden and Balsfjorden were analyzed. The lack of nodularin in most recent sediments is consistent with the fact that only one report on the sporadic occurrence and low amounts of the cyanobacterium in Norwegian Fjords in 1976 has been published. However, analyses of species-specific chemical markers in deep sediments showed that thousands of years ago, N. spumigena constituted an important component of the phytoplankton community. The content of the markers in the cores indicated that the biomass of the cyanobacterium increased during the warmer Holocene periods. The analyses of genetic markers were less conclusive; they showed the occurrence of microcystin/nodularin producing cyanobacteria of Nostocales order, but they did not allow for the identification of the organisms at a species level.
Author Robert Konkel (FOG/IO/DMarB)
Robert Konkel,,
- Division of Marine Biotechnology
, Anna Toruńska-Sitarz (FOG/IO/DMarB)
Anna Toruńska-Sitarz,,
- Division of Marine Biotechnology
, Marta Cegłowska
Marta Cegłowska,,
, Žilvinas Ežerinskis
Žilvinas Ežerinskis,,
, Justina Šapolaitė
Justina Šapolaitė,,
, Jonas Mažeika
Jonas Mažeika,,
, Hanna Mazur-Marzec (FOG/IO/DMarB)
Hanna Mazur-Marzec,,
- Division of Marine Biotechnology
Journal seriesToxins, ISSN 2072-6651, (N/A 100 pkt)
Issue year2020
Publication size in sheets0.55
Article number257
Keywords in Englishnodularin, anabaenopeptins, genetic markers, Holocene climate optimum, sediment cores, Norwegian fjords
ASJC Classification3005 Toxicology; 2307 Health, Toxicology and Mutagenesis
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 16-04-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.136; WoS Impact Factor: 2018 = 3.895 (2) - 2018=4.009 (5)
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