ISSN:
1573-5117
Keywords:
Cyanobacteria
;
waterbloom
;
toxicity
;
mouse bioassay
;
neurotoxin
;
hepatotoxin
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract During the period 1981–1995 331 phytoplankton samples from 153stations in different parts of Sweden were analysed regardingspecies composition and possible toxicity. Toxins were indicated in156 samples which gives a percentage of 47. The toxicity wasconfirmed by mouse bioassay. All samples were collected fromwater-blooming lakes, mainly containing taxa belonging to thecyanobacterial genera Anabaena, Aphanizomenon, Microcystis and Planktothrix. In addition to informationabout occurrence of neuro- or hepatotoxins, knowledge about thedistribution of water-blooming lakes in the country was obtained aswell as about their predominating taxa. Microcystisaeruginosa, Anabaena flos-aquae and Aphanizomenonflos-aquae were the most frequently occurring taxa in the lakes.Among the taxa observed, nine different cyanobacterial species withcertainty produce toxins. Microcystis spp. most frequentlyproduced toxic blooms (only hepatotoxins). Anabaena spp.,however, caused the majority of waterblooms. The Anabaenaflos-aquae-group produced neurotoxins [incl. anatoxin-a(s)],neurotoxins + hepatotoxins or only hepatotoxins. Aphanizomenon flos-aquae was only recorded as toxin-producing inthree Swedish lakes, which may be compared with the conditions inFinland, where it was toxic in 36 bloom samples. Aspects are givenon toxicity versus lake acidification and trophic conditions, aswell as on health effects on animals and humanbeings.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1003047019422
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