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1

Cyanobacteria and cyanotoxins in Polish freshwater bodies

100%
Kobos J., Blaszczyk A., Hohlfeld N., Torunska-Sitarz A., Krakowiak A., Hebel A., Sutryk K., Grabowska M., Toporowska M., Kokocinski M., Messyasz B., Rybak A., Napiorkowska-Krzebietke A., Nawrocka L., Pelechata A., Budzynska A., Zagajewski P., Mazur-Marzec H.
Oceanological and Hydrobiological Studies
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2013
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tom 42
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nr 4
2

Blooms of toxin-producing Cyanobacteria – a real threat in small dam reservoirs at the beginning of their operation

80%
Pawlik-Skowronska B., Toporowska M.
Oceanological and Hydrobiological Studies
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2011
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tom 40
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nr 4
3

Relationship between cyanobacterial bloom composition and anatoxin-a and microcystin occurrence in the eutrophic dam reservoir [SE Poland]

80%
Pawlik-Skowronska B., Skowronski T., Pirszel J., Adamczyk A.
Polish Journal of Ecology
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2004
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tom 52
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nr 4
Long-lasting cyanobacterial blooms were observed over summer periods 2001–2003 in the highly eutrophic dam reservoir (Zemborzycki Reservoir near Lublin, SE Poland) loaded with nitrogen and phosphorus by the river Bystrzyca. Chlorophyll a content and water transparence reached in summer periods 2002–2003 average values 115–129 µg l⁻¹ and 0.5 m, respectively. The blooms consisted of eight taxa of Cyanobacteria occurring in different proportions: Aphanizomenon flos-aquae, Anabaena circinalis, Anabaena spiroides, Anabaena flos-aquae, Planktothrix agardhii, Microcystis aeruginosa, Microcystis viridis, Microcystis wesenbergii. At decreased average water temperature and increased concentration of dissolved ammonium-nitrogen in summer 2003, compared with two earlier years, a replacement of dominant Aph. flos-aquae to P. agardhii was observed. The total abundance of potential microcystin producers was positively correlated with the content of these hepatotoxins in the reservoir water. First time in Poland, mass occurrence of Anabaena strains producing anatoxin-a was observed. Anatoxin-a concentration in the reservoir water was positively correlated with total abundance of 3 taxa of Anabaena. It was no such correlation with Aph. flos-aquae.
4

Detection and identification of potentially toxic cyanobacteria in Polish water bodies

61%
Glowacka J., Szefel-Markowska M., Waleron M., Lojkowska E., Waleron K.
Acta Biochimica Polonica
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2011
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tom 58
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nr 3
The main goal of this study was to determine the distribution of potentially toxic cyanobacteria in 39 selected Polish water bodies. From the water bodies with blooms and also from those in which blooms were not visible 87 samples were investigated. For the first time samples from ponds localized in villages with high agricultural activities were included. Lakes for which microcystin concentrations had been determined before were included as a reference for the research. The detection of cyanobacteria was conducted by microscopic observation as well as by PCR amplification of the rpoC1 gene fragment. Cyanobacteria were present in 75 out of 87 samples. The presence of potentially toxic cyanobacteria was detected by amplification of the mcyB and mcyE genes, which are involved in the biosynthesis of microcystins. Both genes were detected in 7 out of 9 blooms investigated. In the case of samples collected from water bodies in which blooms were not observed, the mcyB and mcyE genes were detected in 20 out of 36. In order to identify the cyanobacteria occurring in selected reservoirs, 16S plus ITS clone libraries were constructed. The method allowed distinguishing 18 different genotypes. After sequence analysis, cyanobacteria belonging to genera Microcystis, Planktothrix, Anabaena, Pseudanabaena, Synechocystis, Synechococcus and Woronichinia were identified. Results confirmed the usefulness of the rpoC1 and mcy genes for monitoring water bodies and detection of potentially toxic cyanobacteria. Application of molecular markers allowed detecting potentially toxic cyanobacteria before the bloom was visible. This is the first comprehensive study concerning cyanobacteria present in different types of Polish water bodies performed using molecular markers.
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