Cyanotoxins: producing organisms, occurrence, toxicity, mechanism of action and human health toxicological risk evaluation

Archives of Toxicology, Journal Year: 2017, Volume and Issue: 91(3), P. 1049 - 1130

Published: Jan. 21, 2017

Language: Английский

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Fluorescence probes for real-time remote cyanobacteria monitoring: A review of challenges and opportunities

Water Research, Journal Year: 2018, Volume and Issue: 141, P. 152 - 162

Published: May 10, 2018

Language: Английский

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Analysis of Microcystins in Cyanobacterial Blooms from Freshwater Bodies in England

Toxins, Journal Year: 2018, Volume and Issue: 10(1), P. 39 - 39

Published: Jan. 11, 2018

Cyanobacterial blooms in freshwater bodies England are currently monitored reactively, with samples containing more than 20,000 cells/mL of potentially toxin-producing species by light microscopy resulting action the water body owner. Whilst significantly reducing risk microcystin exposure, there is little data describing levels these toxins present cyanobacterial blooms. This study focused on quantitative LC-MS/MS analysis microcystins samples, collected across during 2016 and found to contain cyanobacteria. More 50% contained quantifiable concentrations microcystins, approximately 13% exceeding WHO medium health threshold 20 μg/L. Toxic were confirmed over a nine-month period, clear increase late summer, but no apparent geographical patterns. No statistical relationships between total toxin environmental parameters. Complex profiles determined profile clusters unrelated species, although dominance MC-RR was from sites associated lower rainfall. 100% above μg/L limit cell densities or scum, showing current regime suitable for public health. Conversely, only 18% density having μg/L, potential reactive closures unnecessarily impact upon socio-economics local population. In future, routine bloom would provide beneficial confirmatory approach microscopic assessment, aiding both needs users industry.

Language: Английский

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Measures and Approaches in Trait-Based Phytoplankton Community Ecology – From Freshwater to Marine Ecosystems

Frontiers in Marine Science, Journal Year: 2019, Volume and Issue: 6

Published: Feb. 12, 2019

Trait-based approaches to investigate (short- and long-term) phytoplankton dynamics community assembly have become increasingly popular in freshwater marine science. Although the nature of pelagic habitat main taxa ecology are relatively similar both systems, lines research evolved, at least part, separately. We compare contrast adopted ecosystems with respect functional traits. note differences study goals relating trait use that assess those relate ecosystem processes biogeochemical cycling affect type characteristics assigned as traits taxa. Specific relevant for ecological function examined relation herbivory, amplitude environmental change spatial temporal scales study. Major identified, including shorter time scale regular compared open oceans well sampling done by researchers based on site-accessibility. Overall, we encourage researcher better motivate, why they apply trait-based analyses their studies make process-driven approaches, which more common studies. further propose fully comparative conducted along gradient spanning brackish systems or geographic gradients. Such will benefit from combined strength fields.

Language: Английский

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A Review of Cyanophage–Host Relationships: Highlighting Cyanophages as a Potential Cyanobacteria Control Strategy

Toxins, Journal Year: 2022, Volume and Issue: 14(6), P. 385 - 385

Published: May 31, 2022

Harmful algal blooms (HABs) are naturally occurring phenomena, and cyanobacteria the most commonly HABs in freshwater systems. Cyanobacteria (cyanoHABs) negatively affect ecosystems drinking water resources through production of potent toxins. Furthermore, frequency, duration, distribution cyanoHABs increasing, conditions that favor growth predicted to increase coming years. Current methods for mitigating generally short-lived resource-intensive, have negative impacts on non-target species. Cyanophages (viruses specifically target cyanobacteria) potential provide a highly specific control strategy with minimal species propagation environment. A detailed review (primarily up 2020) cyanophage lifecycle, diversity, factors influencing infectivity is provided this paper, along discussion host relationships seven prominent cyanoHAB-forming genera North America, including: Synechococcus, Microcystis, Dolichospermum, Aphanizomenon, Cylindrospermopsis, Planktothrix, Lyngbya. Lastly, affecting application cyanophages as cyanoHAB discussed, including efficacy considerations, optimization, scalability large-scale applications.

Language: Английский

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Understanding and predicting harmful algal blooms in a changing climate: A trait‐based framework

Limnology and Oceanography Letters, Journal Year: 2022, Volume and Issue: 8(2), P. 229 - 246

Published: Dec. 8, 2022

Abstract The worldwide proliferation of harmful algal blooms (HABs) both in freshwater and marine ecosystems make understanding predicting their occurrence urgent. Trait‐based approaches, where the focus is on functional traits, have been successful explaining community structure dynamics diverse but not applied extensively to HABs. existing trait compilations suggest that HAB taxa differ from non key traits determine responses major environmental drivers. Multi‐trait comparisons between HAB‐forming other phytoplankton taxa, as well within groups characterize interspecific intraspecific differences will help better define ecological niches different develop trait‐based mechanistic models, identify conditions would likely lead Building databases using them statistical models increase our ability predict occurrence, composition, severity under changing conditions, including anthropogenic global change.

Language: Английский

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Cyanotoxins: Which detection technique for an optimum risk assessment?

Water Research, Journal Year: 2017, Volume and Issue: 118, P. 227 - 238

Published: April 10, 2017

Language: Английский

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Defining Cyanobacterial Species: Diversity and Description Through Genomics

Critical Reviews in Plant Sciences, Journal Year: 2020, Volume and Issue: 39(2), P. 101 - 124

Published: March 3, 2020

Cyanobacteria were the first oxygenic photosynthersizers, evolving ∼3.5 bya, they have since radiated into one of most diverse and widely distributed phyla bacteria. Cyanobacterial diversification occurs through ecological adaptation, facilitated by asexual reproduction, homologous recombination horizontal gene transfer, selection pressures on ecotypes leading to speciation. Delimiting cyanobacterial species is, thus, fraught with difficulties a clear taxonomy has not yet been universally accepted. This review discusses diversity description cyanobacteria: covering traditional new methods define boundaries concluding focus advances made genomics. Examples from genera Raphidiopsis, Microcystis, Prochlorococcus are used throughout. Genome plasticity allows cyanobacteria rapidly adapt be resilient environmental changes, illustrating means their persistence, is an important aspect biology. Genomics revealed generalist specialist genome strategies, intraspecific diversity, evolution in response stimuli. New taxonomic definitions will need account for genetic variation, classification that relevant concept scientific endeavors. Capturing comparative genomics may provide path classification. demonstrated two case studies; comparison available genomes shows differing delineation Raphidiopsis Microcystis. In both genera, occur at ∼96% average nucleotide identity (ANI), where constrained, but speciation raciborskii, R. brookii, curvata occurred geographic isolation, whereas data Microcystis contain least 15 species, reflecting, extents, different ecotypes, which co-exist. Both studies question relative importance species-specific versus habitat specific pools as drivers inter- diversity.

Language: Английский

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Differences in cyanobacterial strain responses to light and temperature reflect species plasticity

Harmful Algae, Journal Year: 2017, Volume and Issue: 62, P. 84 - 93

Published: Jan. 7, 2017

Language: Английский

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Individual-based modelling of cyanobacteria blooms: Physical and physiological processes

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 792, P. 148418 - 148418

Published: June 11, 2021

Lakes and reservoirs throughout the world are increasingly adversely affected by cyanobacterial harmful algal blooms (CyanoHABs). The development spatiotemporal distributions of governed complex physical mixing transport processes that interact with physiological affecting growth loss bloom-forming species. Individual-based models (IBMs) can provide a valuable tool for exploring integrating some these processes. Here we contend advantages IBMs have not been fully exploited. main reasons lack progress in mainstreaming numerical modelling their complexity high computational demand. In this review, identify gaps challenges use CyanoHABs an overview should be considered simulating spatial temporal cyanobacteria. Notably, important cyanobacteria distributions, particular vertical passive movement, many existing lake ecosystem models. We following research addressed future studies IBMs: 1) effects movement relevant to accumulations, 2) feedbacks on environment; 3) inter intra-specific competition species nutrients light; 4) resolved temporal-spatial data calibration verification targets IBMs; 5) climate change impacts frequency, intensity duration CyanoHABs. well adapted incorporate as next generation

Language: Английский

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