Planktic morphospecies of the cyanobacterial genus Anabaena = subg. Dolichospermum - 1. part: coiled types.

Komárek, Jiří; Zapomělová, Eliška

doi:10.5507/fot.2007.001

Cited by 98 publications

(61 citation statements)

References 15 publications

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“…The results of morphometric measurements of the fresh samples that were collected for the current study were similar to those presented by Li and Watanabe (2000). Komárek and Zapomělová (2007) noted morphological similarities among the four Anabaena species. According to these authors, the following are especially difficult to distinguish: A. circinalis, A. spiroides, and A. flos-aquae.…”

Section: Discussionmentioning

confidence: 99%

“…The subgenus Dolichospermum comprises species of two morphological types with coiled and straight trichomes (Komárek, Zapomělová 2007). Komárek and Zapomělová (2007) included a review of species with coiled trichomes in the first part of this list for practical reasons. In their article, morphospecies are included that occur in nature mainly with straight trichomes.…”

Section: Discussionmentioning

confidence: 99%

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Polyphasic characterization of the genus Anabaena from the Gulf of Gdańsk (Southern Baltic Sea). Application of DGGE in taxonomic studies on environmental samples

Siedlewicz

Forycka

Surosz

2012

Oceanological and Hydrobiological Studies

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The aim of this paper was a taxonomic verification of cyanobacteria of the genus Anabaena that occur in the Gulf of Gdańsk. Classical taxonomic methods were combined with modern molecular taxonomic methods (polyphasic approach). Analysis of the species diversity of cyanobacteria from the genus Anabaena was based on the microscopic analysis and on the analysis of 16S rRNA and ITS region. Comparison of the obtained results with sequences in GenBank showed 97.8-100% similarity for 16S rRNA and 98.8-100% similarity in the case of the ITS fragment. Similarity of the 16S rRNA and ITS sequence of 98.5% seems to be sufficient to determine the species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Polyphasic characterization of the genus Anabaena from the Gulf of Gdańsk (Southern Baltic Sea). Application of DGGE in taxonomic studies on environmental samples

Siedlewicz

Forycka

Surosz

2012

Oceanological and Hydrobiological Studies

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“…A previous study in 1986, considering the whole Lower Uruguay River and eight tributaries, The nostocacean Dolichospermum cf. pseudocompactum was previously known only from eutrophic lakes in Central Japan (Watanabe et al 2004, KomáreK & Zapomělová 2007 and from Jehay Douves, a small artificial lake in Belgium (WiLLaMe & hoFFMann 1999). D. pseudocompactum Uruguayan population Fottea 11(1): 225-234, 2011differs from the Japanese and Belgian ones in the diameter of the trichome coiling and in the akinete, which was bigger in the Uruguayan population (Table 3).…”

Section: Discussionmentioning

confidence: 99%

Planktic Cyanobacteria in the Lower Uruguay River, South America.

Ferrari¹,

Pérez²,

Dabezies³

et al. 2011

Fottea

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Abstract:The Uruguay River is the second most important river in the Río de la Plata Basin. Taxonomical composition, abundance and distribution of cyanobacteria collected at nine sampling stations in the Lower Uruguay River (Uruguay) were analyzed seasonally from 2006 to 2009. A total of 24 taxa were identified, including 13 Chroococcales, 4 Oscillatoriales and 7 Nostocales species. The genera Dolichospermum and Microcystis presented the highest number of species among the planktic water bloom-forming cyanobacteria. The highest densities of cyanobacteria were recorded in summer during a bloom, with 6.2×10 6 cells.ml -1 , and the most abundant species were Microcystis aeruginosa and Dolichospermum cf. pseudocompactum. In this case, the toxicity analyses by HPLC did not indicate the presence of microcystin-LR. Phytoplankton growth in the Uruguay River was found not to be nutrient-limited. The high correlation of cyanobacteria densities with nitrogen and phosphorous compounds is directly related to changes in flow. Cyanobacteria densities increased with summer high temperatures in low flow conditions. The ANOSIM analysis showed no significant differences between zones and sampling sites, but there were temporal significant differences in relation to seasonal samplings. Radiocystis fernandoi KoMáreK et KoMarKová-Legnerová was recorded for the first time in Uruguay and Dolichospermum cf. pseudocompactum (Watanabe) WacKLin et al. was recorded for the first time in South America.

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“…Cyanobacteria taxonomic determination was carried out according to Anagnostidis (1999, 2005) and Komárek and Zapomělová (2007). Cyanobacteria abundance was determined by epifluorescence microscopy, since phycoerythrin and phycocyanin contained in CB, when examined under blue light excitation, fluoresce orange and red, respectively (Walsby and Avery, 1996;Ernst et al, 2006).…”

Section: Cyanobacteria Abundance and Isolationmentioning

confidence: 99%

Cyanobacterial dynamics and toxins concentrations in Lake Alto Flumendosa, Sardinia, Italy

et al. 2017

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Seasonal blooms of cyanobacteria (CB) are a typical feature of Lake Alto Flumendosa (Sardinia, Italy). The waters of this lake are used for drinking water supply, for agricultural and industrial uses, and fish farming activities. Since cyanotoxins are not monitored in edible organisms, diet could be a relevant route of human exposure. CB also represent a threat for the health of wild and domestic animals that use lake water for beverage. Therefore, to characterize the CB community and assess the risk for human and animal population, CB dynamic, mcyB+ fraction, and microcystins (MCs) concentration have been followed monthly for 18 months, in three stations. Results confirmed the presence of several toxigenic species. Planktothrix rubescens dominated between August 2011 and April 2012 (3.5×106 cells L-1), alternating with Woronichinia naegeliana (8×106 cells L-1) and Microcystis botrys (9×105 cells L-1). Dolichospermum planctonicum was always present at low densities (104 cells L-1). MCs were detected, at values well below the 1 µg L-1 threshold of WHO for drinking water. The molecular analysis of mcyB gene for P. rubescens indicated the presence of a persistent toxic population (average 0.45 mcyB/16S rDNA). Highly significant linear regressions were found between P. rubescens and the sum of the demethylated MC variants, and between M. botrys and the sum of MC-LR and MC-LA, also when co-occurring, suggesting that these two species were responsible for different MC patterns production. The regression lines indicated a quite stable MC cell quota. However, in some spotted samples very different values were obtained for both MC concentrations and cell quota (from 10-fold lower to 30-40-fold higher than the ‘average’) showing an unexpected significant variability in the rate of toxin production. The relatively low cell densities during the monitoring period is consistent with the low-to absent MC contamination level found in trout muscle; however, the analytical method was affected by low recovery, probably due to MC-protein binding. Our results show that, during the study period, no risk of exposure for the human and animal population occurred. However, the persistence of a complex CB community characterised by a significant toxic fraction suggests the need for periodic monitoring activity. Particularly, the hidden deep summer P. rubescens blooms, located where water is taken for drinking water supply, and M. botrys, able to produce the most toxic MC variants with high cell quota, should be kept under control. The documentation and interpretation of sudden changes in toxins concentrations deserve special attention. This is particularly relevant in proximity of fish farming plants and water catchment sites.

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Planktic morphospecies of the cyanobacterial genus Anabaena = subg. Dolichospermum - 1. part: coiled types.

Cited by 98 publications

References 15 publications

Polyphasic characterization of the genus Anabaena from the Gulf of Gdańsk (Southern Baltic Sea). Application of DGGE in taxonomic studies on environmental samples

Polyphasic characterization of the genus Anabaena from the Gulf of Gdańsk (Southern Baltic Sea). Application of DGGE in taxonomic studies on environmental samples

Planktic Cyanobacteria in the Lower Uruguay River, South America.

Cyanobacterial dynamics and toxins concentrations in Lake Alto Flumendosa, Sardinia, Italy

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