A systematic literature review of forecasting and predictive models for cyanobacteria blooms in freshwater lakes

Water Research, Journal Year: 2020, Volume and Issue: 182, P. 115959 - 115959

Published: May 22, 2020

Language: Английский

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Freshwater neurotoxins and concerns for human, animal, and ecosystem health: A review of anatoxin-a and saxitoxin

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 736, P. 139515 - 139515

Published: May 21, 2020

Language: Английский

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Culture-independent and culture-dependent analyses of the bacterial community in the phycosphere of cyanobloom-forming Microcystis aeruginosa

Scientific Reports, Journal Year: 2019, Volume and Issue: 9(1)

Published: Dec. 31, 2019

Confocal and scanning electron microscopic observations have previously shown the strong bacterial association of Microcystis aeruginosa cells on their surfaces. DNA-based analyses associated communities were carried out using two M. strains grown in laboratory eight newly collected cyanobacterial bloom samples. was most predominant species (66-100%) within phylum Cyanobacteria. Rhizobium, Hydrogenophaga Brevundimonas commonly found, Flavobacterium present all In total, 396 colonies from various samples screened, revealing that culturable bacteria belonged to class Alphaproteobacteria (19%) including Brevundimonas, Porphyrobacter species. The genetic variation among different habitat conditions may led presence distinct populations tested Among seven isolates, Rhizobium sp. MK23 showed best growth-promotion effect axenic strains. H2O2 observed be produced during growth PCC7806 under light conditions, this strain more resistant when with MK23. Our data suggested along other might help by decomposing aerobic growing conditions.

Language: Английский

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Cyanobacterial community succession and associated cyanotoxin production in hypereutrophic and eutrophic freshwaters

Environmental Pollution, Journal Year: 2021, Volume and Issue: 290, P. 118056 - 118056

Published: Aug. 27, 2021

Language: Английский

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Comparison of the Advantages and Disadvantages of Algae Removal Technology and Its Development Status

Water, Journal Year: 2023, Volume and Issue: 15(6), P. 1104 - 1104

Published: March 13, 2023

In recent years, the frequent outbreaks of cyanobacterial blooms have caused severe water pollution in many rivers and lakes at home abroad, endangering drinking safety human health. How to remove cyanobacteria from bodies safely, quickly, economically has attracted attention scientists. Currently, typical treatment methods for algae algae-bearing are physical, biological, chemical methods. The physical method removal is both symptoms root cause, but workload extensive, with high input costs, should not be used on a large scale. biological low-cost, efficiency slow unsuitable sudden bloom. can kill it easy cause secondary pollution. These relatively independent each other, so choice practical combination technologies essential algal bloom eutrophication management. This paper reviews current application status advantages disadvantages abroad; classifies them chemical, combined methods; provides an outlook future development direction technologies.

Language: Английский

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Classification of inland lake water quality levels based on Sentinel-2 images using convolutional neural networks and spatiotemporal variation and driving factors of algal bloom

Ecological Informatics, Journal Year: 2024, Volume and Issue: 80, P. 102549 - 102549

Published: Feb. 29, 2024

Water quality monitoring in inland lakes is crucial to ensuring the health and stability of aquatic ecosystems. For regional water environment agencies researchers, remote sensing offers a cost-effective alternative traditional in-situ sampling methods. In this study, we designed convolutional neural network (CNN) based on AlexNet represent relationship between Sentinel-2 images situ levels Lake Dianchi from November 2020 April 2023. The model incorporated an algal bloom extraction algorithm utilized correlation analysis, redundancy analysis (RDA), random forest (RF) method establish connections two environmental factors: meteorology, area (AAB). findings revealed improvement Dianchi's quality, with Levels A (good quality) B (mildly polluted averaging 1.24% 84.28%, respectively. Starting October 2022, stabilized at Level B, 98.17%. Seasonal variations demonstrated best spring worst summer (Level C, severely accounting for 5.19% 21.68%, respectively). Algal presence was minimally observed, average AAB value 1.75%, peaking autumn (4.05%) hitting low winter (0.38%). significant identified AAB, notable spatial trend decreasing C north south, featuring lower Southern Waihai compared Central Waihai. Statistical pinpointed total phosphorus (TP) as dominant factor influencing while meteorological factors such wind speed (WS), relative humidity (RH), precipitation (PP) playing secondary roles. Despite fluctuations TP concentration, recent stabilization 0.05 mg/L suggests positive trajectory future management Dianchi.

Language: Английский

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Increasing exposure to global climate change and hopes for the era of climate adaptation: An aquatic perspective

AMBIO, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Language: Английский

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Eutrophication reduces the nutritional value of phytoplankton in boreal lakes

Environmental Research, Journal Year: 2019, Volume and Issue: 179, P. 108836 - 108836

Published: Oct. 29, 2019

Eutrophication (as an increase in total phosphorus [TP]) increases harmful algal blooms and reduces the proportion of high-quality phytoplankton seston content ω-3 long-chain polyunsaturated fatty acids (eicosapentaenoic acid [EPA] docosahexaenoic [DHA]) fish. However, it is not well-known how eutrophication affects overall nutritional value phytoplankton. Therefore, we studied impact on production concentration; μg L−1) (μg mg C−1) amino acids, EPA, DHA, sterols, i.e., 107 boreal lakes. The lakes were categorized seven TP concentration categories ranging from ultra-oligotrophic (<5 to highly eutrophic (>50 L−1). Phytoplankton biomass increased with as expected, but contrast previous studies, contribution did decrease TP. high variation reflected instability community structure We found that epilimnion whereas sterols decreased increasing In terms value, showed a significant quadratic relationship lake trophic status. More specifically, contents same oligo- mesotrophic lakes, substantially lower (TP > 35 L−1/1.13 μmol highest EPA DHA was sterol oligotrophic Based these results, eutrophication, although algae does decrease. results emphasize excess TP, phytoplankton, which may have zooplankton, fish, other aquatic animals at higher food web levels.

Language: Английский

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A novel ternary heterogeneous TiO2/BiVO4/NaY-Zeolite nanocomposite for photocatalytic degradation of microcystin-leucine arginine (MC-LR) under visible light

Ecotoxicology and Environmental Safety, Journal Year: 2021, Volume and Issue: 210, P. 111862 - 111862

Published: Jan. 9, 2021

Microcystin-leucine arginine (MC-LR) is a carcinogenic toxin, produced by cyanobacteria. The release of this toxin into drinking water sources can threaten public health and environmental safety. Therefore, effective MC-LR removal from resources necessary. In the present study, hydrothermal method was used to synthesize novel ternary BiVO4/TiO2/NaY-Zeolite (B/T/N-Z) nanocomposite for degradation under visible light. FESEM, FTIR, XRD, DRS were performed characterizing structure. Also, Response Surface Methodology (RSM) applied determine impact catalyst dosage, pH, contact time on removal. High-performance liquid chromatography measure concentration. Based results, independent parameters, including time, significantly affected (P < 0.05). other words, increasing acidic pH had positive effects Among these variables, with mean square F-value 1041.37 162.84, respectively, greatest effect efficiency. Apart interaction between dosage parameters not significant. maximum efficiency 99.88% optimal conditions (contact = 120 min, 1 g/L, 5). According B/T/N-Z nanocomposite, as photocatalyst could be degrade polluted water.

Language: Английский

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Relevant factors in the eutrophication of the Uruguay River and the Río Negro

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 761, P. 143299 - 143299

Published: Nov. 14, 2020

Language: Английский

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