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Hydrobiologia

, Volume 714, Issue 1, pp 85–92 | Cite as

Clay- and algae-induced effects on biomass, cell size and toxin concentration of a brackish-water cyanobacterium

  • Jonna Engström-ÖstEmail author
  • Sari Repka
  • Andreas Brutemark
  • Aija Nieminen
Primary Research Paper

Abstract

We studied if biomass, cell dimensions and microcystin concentration of the cyanobacterium Anabaena sp. (strain BIR 257; recently also referred to as Dolichospermum) change in the presence of turbidity caused by clay and a eukaryotic green algal species. Anabaena sp. was incubated in experimental lab bioassays, with added clay and the chlorophyte Brachiomonas submarina. A control was established containing a single species of Anabaena sp. Biomass of Anabaena, given as carbon concentration increased in response to clay addition, suggesting that Anabaena was stimulated by lower light conditions whereas B. submarina was not. Cell lengths increased most likely as a response to lower light conditions. Dissolved toxin concentration decreased in treatments containing clay. Increased clay turbidity may favour the cyanobacterium Anabaena sp. over its eukaryotic competitors in the future Baltic Sea, especially in low-salinity estuaries.

Keywords

Cyanobacteria Microcystin Carbon concentration Cell length Chlorophyte Turbidity Climate change 

Notes

Acknowledgments

We thank the staff at Tvärminne Zoological Station (University of Helsinki). Funding from the Academy of Finland (projects 125251, 255566), Maj and Tor Nessling Foundation, Walter och Andrée de Nottbecks Stiftelse and R & D Institute Aronia are acknowledged.

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Jonna Engström-Öst
    • 1
    Email author
  • Sari Repka
    • 2
  • Andreas Brutemark
    • 1
    • 3
  • Aija Nieminen
    • 4
  1. 1.Aronia Coastal Zone Research TeamYrkeshögskolan Novia & Åbo AkademiEkenäsFinland
  2. 2.Centre for Maritime Studies, Environmental Research and Regional DevelopmentUniversity of TurkuPoriFinland
  3. 3.Tvärminne Zoological StationHangöFinland
  4. 4.Section of Ecology, Department of BiologyUniversity of TurkuTurkuFinland

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