Phylogeny and biogeography of the invasive cyanobacterium Cylindrospermopsis raciborskii

Moreira, Cristiana; Fathalli, Afef; Vasconcelos, Vı́tor; Antunes, Agostinho

doi:10.1007/s00203-014-1052-5

Cited by 35 publications

(18 citation statements)

References 19 publications

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“…4), in agreement with other studies (Stüken et al, 2006;Moreira et al, 2015;Dokulil, 2015). Vegetative cells of C. raciborskii can survive at low temperatures (<12°C) and low light intensities, as found in Alte Donau Lake (Dokulil, 2015).…”

Section: Discussionsupporting

confidence: 92%

The success of the cyanobacterium Cylindrospermopsis raciborskii in freshwaters is enhanced by the combined effects of light intensity and temperature

et al. 2016

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Toxic cyanobacterial blooms in freshwaters are thought to be a consequence of the combined effects of anthropogenic eutrophication and climate change. It is expected that climate change will affect water mixing regimes that alter the water transparency and ultimately the light environment for phytoplankton. Blooms of the potentially toxic cyanobacterium Cylindrospermopsis raciborskii are expanding from tropical towards temperate regions. Several hypotheses have been proposed to explain this expansion, including an increase in water temperature due to climate change and the high phenotypic plasticity of the species that allows it to exploit different light environments. We performed an analysis based on eight lakes in tropical, subtropical and temperate regions to examine the distribution and abundance of C. raciborskii in relation to water temperature and transparency. We then conducted a series of short-term factorial experiments that combined three temperatures and two light intensity levels using C. raciborskii cultures alone and in interaction with another cyanobacterium to identify its growth capacity. Our results from the field, in contrast to predictions, showed no differences in dominance (>40% to the total biovolume) of C. raciborskii between climate regions. C. raciborskii was able to dominate the phytoplankton in a wide range of light environments (euphotic zone = 1.5 to 5 m, euphotic zone/mixing zone ratio <0.5 to >1.5). Moreover, C. raciborskii was capable of dominating the phytoplankton at low temperatures (<15°C). Our experimental results showed that C. raciborskii growing in interaction was enhanced by the increase of the temperature and light intensity. C. raciborskii growth in high light intensities and at a wide range of temperatures, suggests that any advantage that this species may derive from climate change that favors its dominance in the phytoplankton is likely due to changes in the light environment rather than changes in temperature. Predictive models that consider only temperature as a drive factor can therefore fail in predicting the expansion of this potentially toxic cyanobacterium.

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Section: Discussionsupporting

confidence: 92%

The success of the cyanobacterium Cylindrospermopsis raciborskii in freshwaters is enhanced by the combined effects of light intensity and temperature

et al. 2016

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“…raciborskii has been shown to produce hepatotoxic cylindrospermopsin and neurotoxic saxitoxins (Wood and Stirling, 2003;Molica et al, 2005). This species originates from tropical regions and currently expands its distribution in temperate regions, therefore it may be considered an invasive species in European waterbodies (Padisák, 1997;Moreira et al, 2015). In this study C. raciborskii was isolated from shallow hypereutrophic Manyas Lake but did not contain the mcyE gene.…”

Section: Discussionmentioning

confidence: 84%

Molecular detection of hepatotoxic cyanobacteria in inland water bodies of the Marmara Region, Turkey

et al. 2017

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Blooms of cyanobacteria are an increasingly frequent phenomenon in freshwater ecosystems worldwide as a result of eutrophication. Many species can produce hepatotoxins that cause severe health hazards to humans. The aim of this study was to identify the bloom forming cyanobacteria species by molecular methods and to amplify genes responsible for hepatotoxin biosynthesis from the environmental samples and isolated strains of cyanobacteria from Küçükçekmece Lagoon, Sapanca, İznik, Manyas and Taşkısı Lakes. A total of 10 bloom samples and 11 isolated strains were examined and Microcystis spp., Planktothrix spp., Nodularia spumigena, Anabaenopsis elenkinii, Sphaerospermopsis aphanizomenoides, Cylindrospermopsis raciborskii were identified. Hepatotoxin genes were detected in 60% of the bloom samples and 45% of the strains. Two Microcystis strains were obtained from Küçükçekmece Lagoon. While the strain assigned to Microcystis flosaquae was non-toxic, Microcystis aeruginosa strain produced microcystin. According to PCR results, the M. aeruginosa and Planktothrix agardhii bloom samples of Küçükçekmece Lagoon contained the microcystin synthetase gene E (mcyE) indicative of microcystin production, however, no microcystin was detected by HPLC. The mcyE gene was also found in Microcystis wesenbergii isolated from Taşkısı Lake, and in all Planktothrix rubescens bloom samples from Sapanca Lake. To our knowledge, this is the first detailed study for identifiying different toxic cyanobacteria species and their hepatotoxin production from several waterbodies in Turkey using molecular methods.

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“…One such species is Cylindrospermopsis raciborskii, a nitrogen-fixing toxic cyanobacterium spreading in temperate regions across the world that is capable of altering local ecosystem processes when dominant (Padisák, 1997;Isvánovics et al, 2000). Recent phylogenetic evidence has suggested that the species originated in the American tropics (Moreira et al, 2015) and its distribution was once thought to be restricted to the tropics and subtropics, where it co-occurs with other bloom-formers such as Microcystis aeruginosa and Anabaena sp. (Marinho & Huszar, 2002;Molica et al, 2005;Soares et al, 2009;Moisander et al, 2012).…”

Section: Introductionmentioning

confidence: 98%

Effects of temperature and nitrogen availability on the growth of invasive and native cyanobacteria

2015

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Rising temperatures are expected to favour the growth of bloom-forming cyanobacteria in temperate lakes, but may also change the composition of cyanobacterial communities. To predict future community and bloom dynamics, it is therefore important to understand how bloom-forming species respond to temperature. Cylindrospermopsis raciborskii (Woloszynska) Seenayya & Subba Raju is an invasive, toxin-producing, nitrogen-fixer that may benefit from warming. To understand how changing temperatures will influence its ability to compete against native North American bloom-formers, we characterized the thermal reaction norms and temperature traits of three C. raciborskii strains, four strains of Microcystis aeruginosa (Kützing) Kützing and one strain of Anabaena flos-aquae (Lyng.) Brèb. C. raciborskii strains had higher optimum temperatures and survived higher temperatures than toxic M. aeruginosa strains, but had no apparent advantage over the non-toxic M. aeruginosa strain or A. flosaquae. M. aeruginosa strains and A. flos-aquae tolerated lower temperatures than C. raciborskii, suggesting that fitness differences at low temperature may be important in limiting the latter's spread. Furthermore, we found that nutrient availability strongly influenced thermal reaction norm shape: nitrogen deprivation lowered growth rates and decreased both low-and high-temperature tolerance, but did not affect the optimum temperature in C. raciborskii.

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Phylogeny and biogeography of the invasive cyanobacterium Cylindrospermopsis raciborskii

Cited by 35 publications

References 19 publications

The success of the cyanobacterium Cylindrospermopsis raciborskii in freshwaters is enhanced by the combined effects of light intensity and temperature

The success of the cyanobacterium Cylindrospermopsis raciborskii in freshwaters is enhanced by the combined effects of light intensity and temperature

Molecular detection of hepatotoxic cyanobacteria in inland water bodies of the Marmara Region, Turkey

Effects of temperature and nitrogen availability on the growth of invasive and native cyanobacteria

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