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The profound effect of harmful cyanobacterial blooms: From food-web and management perspectives.

Authors
  • Šulčius, Sigitas1
  • Montvydienė, Danguolė2
  • Mazur-Marzec, Hanna3
  • Kasperovičienė, Jūratė2
  • Rulevičius, Rokas2
  • Cibulskaitė, Živilė4
  • 1 Laboratory of Algology and Microbial Ecology, Nature Research Centre, Akademijos str. 2, LT-08412 Vilnius, Lithuania. Electronic address: [email protected] , (Lithuania)
  • 2 Laboratory of Algology and Microbial Ecology, Nature Research Centre, Akademijos str. 2, LT-08412 Vilnius, Lithuania. , (Lithuania)
  • 3 Department of Marine Biotechnology, Institute of Oceanography, University of Gdańsk, al. Marszałka Piłsudskiego 46, PL-81-378 Gdynia, Poland. , (Poland)
  • 4 Laboratory of Ecology and Physiology of Hydrobionts, Verkių str. 98, LT 08406 Vilnius, Lithuania. , (Lithuania)
Type
Published Article
Journal
The Science of the total environment
Publication Date
Dec 31, 2017
Volume
609
Pages
1443–1450
Identifiers
DOI: 10.1016/j.scitotenv.2017.07.253
PMID: 28800687
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Sustainable and effective water management plans must have a reliable risk assessment strategies for harmful cyanobacterial blooms (HABs) that would enable timely decisions to be made, thus avoiding the trespassing of ecological thresholds, leading to the collapse of ecosystem structure and function. Such strategies are usually based on cyanobacterial biomass and/or on the monitoring of known toxins, which may, however, in many cases, under- or over-represent the actual toxicity of the HAB. Therefore, in this study, by the application of growth-inhibition assays using different bacteria, algae, zooplankton and fish species, we assessed the toxicological potential of two cyanobacterial blooms that differed in total cyanobacterial biomass, species composition and cyanopeptide profiles. We demonstrated that neither cyanobacterial community composition nor its relative abundance, nor indeed concentrations of known toxins reflected the potential risk of HAB based on growth-inhibition assays. We discuss our findings in the context of food-web dynamics and ecosystem management, and suggest that toxicological tests should constitute a key element in the routine monitoring of water bodies so as to prevent under-/over-estimation of potential HAB risk for both ecosystem and public health. Copyright © 2017 The Authors. Published by Elsevier B.V. All rights reserved.

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