Understanding the winning strategies used by the bloom-forming cyanobacterium Cylindrospermopsis raciborskii

Burford, Michele A.; Beardall, John; Willis, Anusuya; Orr, Philip T.; Magalhães, Valéria Freitas de; Rangel, Luciana M.; Azevedo, Sandra M.F.O.; Neilan, Brett A.

doi:10.1016/j.hal.2015.10.012

Cited by 162 publications

(119 citation statements)

References 123 publications

Supporting

Mentioning

100

Contrasting

Unclassified

Order By: Relevance

“…In this context, the importance of light as a critical factor for determining the initial growth and expansion of C. raciborskii has significant implications in the context of changing climates. The species is increasingly being found in freshwater water bodies around the world, indicating no climate restrictions (Burford et al, 2016), except for extreme polar regions. According to our data, although temperature regulates C. raciborskii growth in general, there is no clear temperature limitation controlling its expansion, and changing stratification dynamics in temperate lakes, due to climate change, may therefore present opportunities for the future success of this species.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2016

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

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

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Although the N 2 -fixation rate of R. raciborskii is lower than ammonium and nitrate uptake rates and accounts for less than 10% of total N assimilation by this organism, N 2 -fixation by R. raciborskii plays a vital role in regulating the physiological adaptation of this organism in N-fluctuating environments. These facultative characteristics also provide competitive growth advantages for R. raciborskii under conditions where combined N concentrations fluctuate (Moisander et al, 2012;Burford et al, 2016). These facultative characteristics also provide competitive growth advantages for R. raciborskii under conditions where combined N concentrations fluctuate (Moisander et al, 2012;Burford et al, 2016).…”

Section: Introductionmentioning

confidence: 95%

Physiological responses of the freshwater N₂‐fixing cyanobacterium Raphidiopsis raciborskii to Fe and N availabilities

Yeung

Fujii

et al. 2019

Environmental Microbiology

Self Cite

View full text Add to dashboard Cite

Summary The cyanobacterium Raphidiopsis raciborskii is of environmental and social concern in view of its toxicity, bloom‐forming characteristics and increasingly widespread occurrence. However, while availability of macronutrients and micronutrients such as N and Fe are critically important for the growth and metabolism of this organism, the physiological response of toxic and non‐toxic strains of R. raciborskii to varying Fe and N availabilities remains unclear. By determining physiological parameters as a function of Fe and N availability, we demonstrate that R. raciborskii growth and N2‐fixing activity are facilitated at higher Fe availability under N2‐limited conditions with faster growth of the CS‐506 (cylindrospermopsin‐producing) strain compared with that of CS‐509 (the non‐toxic) strain. Radiolabelled Fe uptake assays indicated that R. raciborskii acclimated under Fe‐limited conditions acquires Fe at significantly higher rates than under Fe replete conditions, principally via unchelated Fe(II) generated as a result of photoreduction of complexed Fe(III). While N2‐fixation of both strains occurred during both day and night, the CS‐506 strain overall exhibited higher N2‐fixing and Fe uptake rates than the CS‐509 strain under N‐deficient and Fe‐limited conditions. The findings of this study highlight that Fe availability is of significance for the ecological advantage of CS‐506 over CS‐509 in N‐deficient freshwaters.

show abstract

“…Therefore, it appears that its northward spread continues. Different theories explaining this phenomenon have been put forward including global warming, phenotypic plasticity or the occurrence of physiologically different ecotypes (Bonilla et al 2016;Burford et al 2016).…”

Section: Distribution In Polandmentioning

confidence: 99%

“…This feature is not only geographically-diversified ) but particular strains from the same region can also vary in this respect (Chonudomkul et al 2004). Furthermore, particular populations may be constituted of non-toxic and toxic strains cooccurring within the same habitat while toxin-positive strains may also vary in levels of biosynthesized toxin (Willis et al 2016).…”

Section: Potential Toxicitymentioning

confidence: 99%

“…Over the years, numerous experimental and in-field studies on C. raciborskii have been conducted by Australian, Asian, North and South American and European research teams (for reviews see Bonilla et al 2012;Antunes et al 2015;Burford et al 2016). Investigations in Poland have contributed to a general understanding of C. raciborskii in the temperate zone although a number of unknowns remain that require further attention.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the occurrence and toxicity of Cylindrospermopsis raciborskii in Poland

Rzymski

Brygider

Kokociński

2017

Limnological Review

View full text Add to dashboard Cite

Abstract:Cylindrospermopsis raciborskii which belongs to the order of Nostocales has continuously been at the centre of interest of various research groups owing to its great ecological plasticity, wide distribution and potential to produce different metabolites known to be harmful for humans and animals. Over recent decades, Polish strains of C. raciborskii have also been studied with regard to these issues. The present paper is a brief review of the present state of knowledge respecting the occurrence and toxicity of this species with emphasis on Polish strains, and indicates potential directions for future research.

show abstract

Understanding the winning strategies used by the bloom-forming cyanobacterium Cylindrospermopsis raciborskii

Cited by 162 publications

References 123 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

Physiological responses of the freshwater N₂‐fixing cyanobacterium Raphidiopsis raciborskii to Fe and N availabilities

On the occurrence and toxicity of Cylindrospermopsis raciborskii in Poland

Contact Info

Product

Resources

About

Understanding the winning strategies used by the bloom-forming cyanobacterium Cylindrospermopsis raciborskii

Cited by 162 publications

References 123 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

Physiological responses of the freshwater N2‐fixing cyanobacterium Raphidiopsis raciborskii to Fe and N availabilities

On the occurrence and toxicity of Cylindrospermopsis raciborskii in Poland

Contact Info

Product

Resources

About

Physiological responses of the freshwater N₂‐fixing cyanobacterium Raphidiopsis raciborskii to Fe and N availabilities