A review on monitoring, forecasting, and early warning of harmful algal bloom

Aquaculture, Journal Year: 2024, Volume and Issue: 593, P. 741351 - 741351

Published: July 16, 2024

Language: Английский

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Microfluidic Device on Fused Silica for Raman Spectroscopy of Liquid Samples

Biosensors, Journal Year: 2025, Volume and Issue: 15(3), P. 172 - 172

Published: March 6, 2025

Water testing is becoming increasingly important due to dangerous phenomena such as Harmful Algal Blooms (HABs). Commonly, the content of a water sample measured for detection, monitoring and control these events. Raman spectroscopy technique molecular characterization materials in solid, liquid or gaseous form, which makes it an attractive method analysing materials' components. However, scattering weak optical process requires accurate system detection. In our work, we present, from design fabrication, microfluidic device on fused silica adapted optimise spectrum samples when using probe. The features portable rapid on-site continuous flow measurements avoiding use large, costly complex laboratory equipment. main manufacturing used was ultrafast laser-assisted etching (ULAE). Finally, effectiveness demonstrated by comparing spectra known species cyanobacteria with those obtained other conventional substrates analysis. results demonstrate that device, under conditions, exhibited lower standard deviation signal, reduced background noise avoided signal variations caused drying static measurements.

Language: Английский

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Management of cyanobacteria and cyanotoxins in drinking water: A comprehensive review on occurrence, toxicity, challenges and treatment approaches

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 976, P. 179260 - 179260

Published: April 9, 2025

Language: Английский

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Toward a Predictive Understanding of Cyanobacterial Harmful Algal Blooms through AI Integration of Physical, Chemical, and Biological Data

ACS ES&T Water, Journal Year: 2023, Volume and Issue: 4(3), P. 844 - 858

Published: Nov. 30, 2023

Freshwater cyanobacterial harmful algal blooms (cyanoHABs) are a worldwide problem resulting in substantial economic losses, due to harm drinking water supplies, commercial fishing, wildlife, property values, recreation, and tourism. Moreover, toxins produced from some cyanoHABs threaten human animal health. Climate warming can affect the distribution of cyanoHABs, where rising temperatures facilitate more intense greater inland freshwater. Nutrient runoff adjacent watersheds is also major driver cyanoHAB formation. While physicochemical factors behind dynamics known, there still gaps our understanding conditions that trigger sustain over time. In this perspective, we suggest sufficient data sets, as well machine learning (ML) artificial intelligence (AI) tools, available build comprehensive model based on integrated environmental/climate, nutrient/water chemistry, microbiome 'omics identify key contributing HAB formation, intensity, toxicity. By taking holistic approach analysis all data, including rapidly growing number biological provide foundational knowledge needed address increasing threat security resources.

Language: Английский

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Algae in Recreational Waters: An Overview within a One Health Perspective

Water, Journal Year: 2024, Volume and Issue: 16(7), P. 946 - 946

Published: March 25, 2024

Recreational water activities are widely recognized to have a positive impact on our physical and mental well-being. However, recreational sources their management also risk factor for human health due different agents, including the overgrowth of cyanobacteria algae. The presence algae in waters represents One Health threat because potential release overuse biocides. These organisms metabolize organic matter produce thermophilic thermotolerant toxins. Moreover, species involved biofilm formation processes, thus impacting quality safety posing risks environment animal health. Different participate an managing equipment maintenance. By searching literature databases, e.g., PubMed, we reviewed state art, providing basic definitions, taxonomy, epidemiological or medical issues related uses water. Methods treatments monitoring were summarized, considering both traditional innovative strategies. Public surveillance approaches focus detection toxins, biofilms, understanding benthonic planktonic components as part larger microbial biodiversity. review process allowed us acknowledge that this is first comprehensive overview carried out within wider outlook.

Language: Английский

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Monitoring of toxic cyanobacterial blooms in Lalla Takerkoust reservoir by satellite imagery and microcystin transfer to surrounding farms

Harmful Algae, Journal Year: 2024, Volume and Issue: 135, P. 102631 - 102631

Published: April 27, 2024

Cyanobacterial harmful algal blooms (CyanoHABs) threaten public health and freshwater ecosystems worldwide. In this study, our main goal was to explore the dynamics of cyanobacterial how microcystins (MCs) move from Lalla Takerkoust reservoir nearby farms. We used Landsat imagery, molecular analysis, collecting analyzing physicochemical data, assessing toxins using HPLC. Our investigation identified two species responsible for blooms: Microcystis sp. Synechococcus strain produced three MC variants (MC-RR, MC-YR, MC-LR), with MC-RR exhibiting highest concentrations in dissolved intracellular toxins. contrast, did not produce any detectable To validate Normalized Difference Vegetation Index (NDVI) results, we utilized limnological including cell counts, quantified MCs freeze-dried bloom samples collected reservoir. study revealed patterns trends proliferation over 30 years presented a historical map area infestation NDVI method. The found that MC-LR accumulates near water surface due buoyancy Microcystis. maximum concentration 160 µgL−1. 4 km downstream reservoir, decreased by factor 5.39 29.63 µgL−1, indicating decrease increasing distance source. Similarly, MC-YR 2.98 same distance. Interestingly, distribution varied depth, dominating at outlet depth 10 m. findings highlight impact nutrient concentrations, environmental factors, transfer processes on distribution. emphasize need effective management strategies minimize toxin ensure safety.

Language: Английский

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Sustainable bioremediation technologies for algal toxins and their ecological significance

Environmental Pollution, Journal Year: 2023, Volume and Issue: 341, P. 122878 - 122878

Published: Nov. 13, 2023

Language: Английский

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Dynamics of the benthic and planktic microbiomes in a Planktothrix-dominated toxic cyanobacterial bloom in Australia

Water Research, Journal Year: 2023, Volume and Issue: 249, P. 120980 - 120980

Published: Dec. 5, 2023

Cyanobacterial blooms are a concerning issue that threaten ecosystems, ecology and animal health. Bloom frequency has increased tremendously in recent times due to pollution, eutrophication of waterways, climate change, changes microbial community dynamics within the aquatic environment. Information about spatiotemporal variation communities drive cyanobacterial bloom is very limited. Here, we analysed diversity composition bacterial communities, with focus on cyanobacteria, during phase natural reservoir Eastern Australia using high throughput amplicon sequencing. Sampling points season had no influence richness evenness period, however some compositional differences were apparent across seasons. Cyanobacteria highly abundant summer autumn compared winter spring. The dominant taxa Planktothrix, Cyanobium Microcystis found be significantly autumn. While abundance soared (25.4%), dominated by Planktothrix (12.2%) (8.0%), was highest (24.9%) consisted (7.8%), Nodularia (5.3%), Planktothricoides (4.6%), (3.5%), (2.3%). strongly correlated non-photosynthetic Gastranaerophilales sediment water, suggested vertical transmission from gut through faeces. To our knowledge, this first report Planktothrix-driven toxic Australia. Our study expands current understanding sheds light setting future management strategies for its control.

Language: Английский

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Characterization of Taxonomic and Functional Dynamics Associated with Harmful Algal Bloom Formation in Recreational Water Ecosystems

Toxins, Journal Year: 2024, Volume and Issue: 16(6), P. 263 - 263

Published: June 7, 2024

Harmful algal bloom (HAB) formation leads to the eutrophication of water ecosystems and may render recreational lakes unsuitable for human use. We evaluated applicability comparison metabarcoding, metagenomics, qPCR, ELISA-based methods cyanobacteria/cyanotoxin detection in non-bloom sites Great Lakes region. DNA sequencing-based robustly identified differences between samples (e.g., relative prominence Anabaena Planktothrix). Shotgun sequencing strategies also enrichment metabolic genes typical cyanobacteria samples, though toxin were not detected, suggesting deeper or PCR be needed detect low-abundance genes. ELISA indicated microcystin levels gene copies significantly more abundant sites. However, all positive microcystin, possibly due development by non-toxin-producing species. Additionally, correlated (positively) with copy number but total cyanobacterial 16S copies. In summary, next-generation can identify specific taxonomic functional targets, which used absolute quantification (qPCR ELISA) augment conventional monitoring strategies.

Language: Английский

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Seasonal dynamics of toxigenic Microcystis in a large, shallow Lake Peipsi (Estonia) using microcystin mcyE gene abundance

Environmental Monitoring and Assessment, Journal Year: 2024, Volume and Issue: 196(8)

Published: July 18, 2024

Language: Английский

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