Microcystin Contamination and Toxicity: Implications for Agriculture and Public Health

Toxins, Journal Year: 2022, Volume and Issue: 14(5), P. 350 - 350

Published: May 17, 2022

Microcystins are natural hepatotoxic metabolites secreted by cyanobacteria in aquatic ecosystems. When present at elevated concentrations, microcystins can affect water quality aesthetics; contaminate drinking reservoirs and recreational waters; disrupt normal ecosystem functioning; cause health hazards to animals, plants, humans. Animal human exposures generally result from ingesting contaminated or physically contacting tainted water. Much research has identified a multitude of liver problems oral exposure microcystins, varying hepatocellular damage primary cancer. Provisional guidelines for have been established prevent toxic protect public health. With increasing occurrences eutrophication freshwater systems, microcystin contamination groundwater surface waters is growing, posing threats terrestrial plants agricultural soils used crop production. These often transferred crops via irrigation with local sources water, such as bloom-forming lakes ponds. survive high quantities various parts (roots, stems, leaves) due their chemical stability low molecular weight, risks consumers products. Studies indicated potential associated fruits vegetables sourced irrigated containing microcystins. This review considers the risk humans, environment presence irrigation. Additional studies needed understand specific impacts consumption microcystin-contaminated plants.

Language: Английский

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A Survey of Recently Discovered Naturally Occurring Organohalogen Compounds

Journal of Natural Products, Journal Year: 2024, Volume and Issue: 87(4), P. 1285 - 1305

Published: Feb. 20, 2024

The discovery of naturally occurring organohalogen compounds has increased astronomically in the 55 years since they were first discovered─from fewer than 50 1968 to a combined 7,958 described examples three comprehensive reviews. present survey, which covers period 2021–2023, brings number known natural organohalogens approximately 8,400. organization is according species origin, and coverage includes marine terrestrial plants, fungi, bacteria, sponges, corals, cyanobacteria, tunicates, other organisms.

Language: Английский

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Cyto-genotoxic effects predict ecotoxicity in plant bioassays and the aquatic organism Artemia salina L.: a case study from a sewage treatment plant

Journal of Environmental Science and Health Part A, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 17

Published: March 2, 2025

This study evaluated the toxicological and mutagenic potential of water samples from a Wastewater Treatment Plant (WWTP) in Lavras, Minas Gerais, Brazil. Samples were taken four sites: upstream stream (P1), downstream (P2), at entrance treatment station (P3), exit (P4). We conducted physicochemical analyses water, phytotoxicity tests on plants (Triticum aestivum, Pennisetum glaucum, Lactuca sativa, Raphanus sativus), cytogenotoxicity using onion roots (Allium cepa), Artemia salina immobilization tests. Elevated Biochemical Oxygen Demand (BOD), Chemical (COD), anionic surfactants, ammoniacal nitrogen found P3 P4. While germination rates generally unaffected, P4 inhibited speed R. sativus. The growth L. sativa increased P4, sativus P2, due to more phosphorus. T. aestivum P. however, had their surfactant toxicity. Cytogenotoxicity revealed highest frequencies micronuclei nuclear buds cells exposed Additionally, caused 87.5% A. salina. These findings suggest that WWTP is not fully efficient, its effluent discharge may contribute eutrophication genetic mutations organisms.

Language: Английский

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Nutrients and not temperature are the key drivers for cyanobacterial biomass in the Americas

Harmful Algae, Journal Year: 2022, Volume and Issue: 121, P. 102367 - 102367

Published: Dec. 16, 2022

Language: Английский

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Sex, Nutrition, and NAFLD: Relevance of Environmental Pollution

Nutrients, Journal Year: 2023, Volume and Issue: 15(10), P. 2335 - 2335

Published: May 16, 2023

Non-alcoholic fatty liver disease (NAFLD) is the most common form of chronic and represents an increasing public health issue given limited treatment options its association with several other metabolic inflammatory disorders. The epidemic, still growing prevalence NAFLD worldwide cannot be merely explained by changes in diet lifestyle that occurred last few decades, nor from their genetic epigenetic risk factors. It conceivable environmental pollutants, which act as endocrine disruptors, may contribute to spreading this pathology due ability enter food chain ingested through contaminated water. Given strict interplay between nutrients regulation hepatic metabolism reproductive functions females, pollutant-induced dysfunctions particular relevance for female liver, dampening sex differences prevalence. Dietary intake pollutants can particularly detrimental during gestation, when endocrine-disrupting chemicals interfere programming metabolism, accounting developmental origin offspring. This review summarizes cause-effect evidence increased incidence emphasizes need further studies field.

Language: Английский

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Understanding the Risks of Diffusion of Cyanobacteria Toxins in Rivers, Lakes, and Potable Water

Toxins, Journal Year: 2023, Volume and Issue: 15(9), P. 582 - 582

Published: Sept. 20, 2023

Blue-green algae, or cyanobacteria, may be prevalent in our rivers and tap water. These minuscule bacteria can grow swiftly form blooms warm, nutrient-rich Toxins produced by cyanobacteria pollute streams harm the liver nervous system humans. This review highlights properties of 25 toxin types 12 different genera. The also covered strategies for reducing controlling issues. include using physical chemical treatments, cutting back on fertilizer input, algal lawn scrubbers, antagonistic microorganisms biocontrol. Micro-, nano- ultrafiltration techniques could used removal internal extracellular cyanotoxins, addition to powdered granular activated carbon, ozonation, sedimentation, ultraviolet radiation, potassium permanganate, free chlorine, pre-treatment oxidation techniques. efficiency treatment removing intracellular cyanotoxins is demonstrated. approaches aim lessen risks cyanobacterial associated toxins. Effective management water systems depends early detection quick action. Cyanobacteria cells their toxins detected microscopy, molecular methods, chromatography, spectroscopy. Understanding causes many ways elimination will help this crucial environmental issue.

Language: Английский

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Investigating the effects of anthropogenic stressors on lake biota using sedimentary DNA

Freshwater Biology, Journal Year: 2022, Volume and Issue: 68(11), P. 1799 - 1817

Published: Dec. 5, 2022

Abstract Analyses of sedimentary DNA ( sed DNA) have increased exponentially over the last decade and hold great potential to study effects anthropogenic stressors on lake biota time. Herein, we synthesise literature that has applied a approach track historical changes in biodiversity response impacts, with an emphasis past c. 200 years. We identified following research themes are particular relevance: (1) eutrophication climate change as key drivers limnetic communities; (2) increasing homogenisation communities across large spatial scales; (3) dynamics invasive species traced sediment archives. Altogether, this review highlights draw more comprehensive picture stressors, opening up new avenues field paleoecology by unrevealing hidden biodiversity, building paleo‐indicators, reflecting either taxonomic or functional attributes. Broadly, analyses provide perspectives can inform ecosystem management, conservation, restoration offering measure ecological integrity vulnerability, well functioning.

Language: Английский

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Cyanobacterial blooms in Ontario, Canada: continued increase in reports through the 21st century

Lake and Reservoir Management, Journal Year: 2023, Volume and Issue: 39(1), P. 1 - 20

Published: Jan. 2, 2023

Favot EJ, Holeton C, DeSellas AM, Paterson AM. 2023. Cyanobacterial blooms in Ontario, Canada: continued increase reports through the 21st century. Lake Reserv Manage. 39:1–20.The Ontario Ministry of Environment, Conservation and Parks samples algal composition response to public suspected blooms, which have been tracked since 1994. In a previous analysis, Winter et al. noted significant number confirmed dominated by cyanobacteria from 1994 2009. Here, we determined that this increasing trend yearly cyanobacterial bloom (CCBRs) has persisted over intervening decade, 2019. More than half CCBRs were waterbodies on Precambrian Shield, Georgian Bay (5E) ecoregion, known for cottaging water-based tourism. Data Partner Program (LPP) was used investigate total phosphorus (TP) concentrations with CCBRs. Approximately 44% CCBR (mean TP 12.99 µg/L, n = 135) had average spring less 10 compared 64% LPP no reported or 9.79 918). The most common taxon dominating inland Dolichospermum, followed Aphanizomenon Microcystis Mixedwood Plains ecozone southern Ontario. While an awareness cannot be ruled out contributing rise across high proportion occurring oligotrophic suggests there may link climate warming, rendering conditions more favorable these occur.

Language: Английский

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Harmful Cyanobacterial Blooms: Going beyond the “Green” to Monitor and Predict HCBs

Hydrobiology, Journal Year: 2024, Volume and Issue: 3(1), P. 11 - 30

Published: Jan. 2, 2024

Under the Climate Change scenario, occurrence of Harmful Cyanobacterial Blooms (HCBs) is an increasingly concerning problem. Particularly for inland freshwaters, that have human populations depending on them consumption or recreation, HCBs can lead to serious ecological damages and socio-economic impacts, but also health risks local communities. From satellite imagery molecular data, there increasing number methodological approaches help improve monitoring prediction cyanobacterial blooms. However, although each methodology has its own strengths limitations, generally a lack data addressing specific intraspecific information, which implications modelling real dynamics toxicity HCBs. The present review intends make quick overview current monitor blooms provide tier-based integrative perspective their application. A transversal at wide scale should be enhanced cannot rely only pigment levels rather include diversity information obtained from modern tools. This crucial achieve effective prediction, management under severity trends in freshwaters.

Language: Английский

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Impacts of cyanobacterial metabolites on fish: Socioeconomic and environmental considerations

Reviews in Aquaculture, Journal Year: 2024, Volume and Issue: 16(3), P. 1186 - 1211

Published: Jan. 14, 2024

Abstract The increasing global population has led to rising demand for food, particularly protein. As an excellent source of protein, fish play a crucial role in meeting this demand, making aquaculture highly impactful industry. Floating cages have been developed as method management and production achieve high productivity volume. However, these intensive farming practices can contribute eutrophication, leading changes primary producers promoting the excessive proliferation cyanobacteria. Cyanobacteria blooms pose significant consequences aquatic ecosystems, including potential risks exposed harmful cyanobacterial metabolites. Cyanobacterial metabolites encompass various chemical classes, such terpenoids, carotenoids, alkaloids, cyanopeptides, amino acids, organophosphates, macrolides, lipopolysaccharides. Some compounds' toxicity impact on farms still need be better understood. Cyanotoxins off‐flavour compounds water quality health hazards humans throughout food chain. Therefore, cyanobacteria economic, environmental, public implications. This review examines concerns associated with natural products farming, off‐flavours, known cyanotoxins, other potentially toxic compounds, while exploring their socioeconomic environmental risks.

Language: Английский

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