Cell density dependence of Microcystis aeruginosa responses to copper algaecide concentrations: Implications for microcystin-LR release

Kinley, Ciera M.; Iwinski, Kyla J.; Hendrikse, Maas; Geer, Tyler D.; Rodgers, John H.

doi:10.1016/j.ecoenv.2017.08.010

Cited by 19 publications

(4 citation statements)

References 20 publications

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“…This harmless effect has been previously reported for this type of compound in Danio rerio [20]. However copper sulfate, which is recommended as an algicide, is toxic to many other species in aquatic environments [16,21].…”

Section: Discussionsupporting

confidence: 73%

“…This seems to indicate a specific action in the levels of Chl a. Strangely, at a lower concentration, 3,5-dimethoxybenzoic acid, and especially syringic acid, were powerful promotors of M. aeruginosa Kützing growth. As might be expected, copper sulfate caused 100% inhibition; this compound has been conventionally used to control blooms in reservoirs for several years [16]…”

Section: Growth Inhibition Of M Aeruginosa Kützingmentioning

confidence: 76%

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Effect of Phenyl-Acyl Compounds on the Growth, Morphology, and Toxin Production of Microcystis aeruginosa Kützing

Herrera

Flórez

Velásquez

et al. 2019

Water

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The proliferation of cyanobacteria and, consequently, the production of cyanotoxins is a serious public health concern; for their control, several alternatives have been proposed, including physical, chemical, and biological methods. In the search for new alternatives and a greater understanding of the biochemical process involved in the blooms’ formation, we report here the effect of eight phenyl-acyl compounds in the growth of Microcystis aeruginosa Kützing (assesed as cell density/count and Chl a fluorescence concentration) morphology, and production of the toxin microcystin-LR (MC-LR). Caffeic acid and eugenol decreased the growth of M. aeruginosa Kützing and the levels of Chl a. However, 3,5-dimethoxybenzoic acid and syringic acid caused the opposite effect in the growth; 2′and 4′only affected the Chl a. A reduction in the concentration of the MC-LR toxin was detected after treatment with syringic acid, caffeic acid, and eugenol. According to HPLC/MS (High Performance Liquid Chromatography coupled to Mass Spectrometry), a redox process possibly occurs between caffeic acid and MC-LR. The optical microscopy and Scanning Electron Microscopy analyses revealed morphological changes that had been exposed to caffeic acid and vanillin, specifically in the cell division and presence of mucilage. Finally, assays in Daphnia pulex De Geer neonates indicated that caffeic acid had a non-toxic effect at concentrations as high as 100 mg/L at 48 h.

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Section: Discussionsupporting

confidence: 73%

Section: Growth Inhibition Of M Aeruginosa Kützingmentioning

confidence: 76%

Effect of Phenyl-Acyl Compounds on the Growth, Morphology, and Toxin Production of Microcystis aeruginosa Kützing

Herrera

Flórez

Velásquez

et al. 2019

Water

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“…Pearson correlation coefficient for cyanobacteria and extracellular microcystins showed a strongly, negative correlation of − 0.869 (Supporting Figure 2a). Kinley et al [18] also observed the release of intracellular microcystins upon exposure to copper-based algaecide product. Iwinski et al [15] observed the same strong negative correlation between cyanobacteria population and release of intracellular microcystin, thus increasing the extracellular microcystin concentration.…”

Section: Bench-scale Results Of Cyanobacteria Suppression With Cutrinmentioning

confidence: 97%

Bench-scale assessment of three copper-based algaecide products for cyanobacteria management in source water

et al. 2021

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Three copper-based algaecide products were investigated for use in a drinking water source to address cyanobacteria growth. Bench-scale experiments were used to determine the optimal dose of each product given Lake Rockwell’s indigenous population and reservoir-specific characteristics. The optimal dose of Cutrine Ultra was determined to be a quarter dose (corresponding to 0.125 mg/L Cu) as it decreased 55% of the cyanobacteria population with limited release of microcystin and minimal rebound in the cyanobacteria population. The optimal dose for EarthTec was determined to be a half dose (i.e., 0.5 mg/L). The full dose was optimal for SeClear (1 mg/L Cu). The optimal doses had extracellular microcystin levels of 0.99 ± 0.09 µg/L (quarter dose Cutrine Ultra), 3.69 ± 0.43 µg/L (half dose EarthTec) and 0.92 ± 0.26 µg/L (full dose SeClear) by day 2. EarthTec and Cutrine Ultra facilitated a similar overall response, and the cyanobacteria population was predominately suppressed in the initial 2 days following treatment and then increased between 7 and 14 days after treatment (i.e., rebound). Both the suppression within the first 2 days and the rebound between 7 and 14 days after treatment were a function of dose (e.g., lower dose, larger increase in rebound). Although SeClear suppressed the cyanobacteria population during the initial 2 days after treatment (42,000 ± 3240 cells/mL at the baseline to 4822 ± 841), the cyanobacteria population rebounded significantly (p < 0.05) between 2 and 7 days after treatment.

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“…Various treatments have been utilized, including several physical, chemical and biological methods. The following methods/reagents have been used to address the problems caused by Cyano-HABs: ultra-sonication [10], waterwheel system for water aeration [11,12], loess spraying [12], algicidal materials [13], coagulants [14] and algicidal bacteria [15]. Spraying loess into water bodies has been primarily employed to control Cyano-HABs in South Korea [12].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Strategy for Removal of Harmful Cyanobacterial Species Microcystis aeruginosa Using Chitosan Fiber

Park¹,

Kim²,

Kim³

et al. 2020

Sustainability

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Microcystis aeruginosa is one of the predominant species responsible for cyanobacterial-harmful algal blooms (Cyano-HABs) in water bodies. Cyano-HABs pose a growing number of serious threats to the environment and public health. Therefore, the demand for developing safe and eco-friendly solutions to control Cyano-HABs is increasing. In the present study, the adsorptive strategy using chitosan was applied to remove M. aeruginosa cells from aqueous phases. Using a simple immobilization process, chitosan could be fabricated as a fiber sorbent (chitosan fiber, CF). By application of CF, almost 89% of cyanobacterial cells were eliminated, as compared to those in the control group. Field emission scanning electron microscopy proved that the M. aeruginosa cells were mainly attached to the surface of the sorbent, which was correlated well with the measurement of the surface area of the fiber. We tested the hypothesis that massive applications of the fabricated CF to control Cyano-HABs might cause environmental damage. However, the manufactured CF displayed negligible toxicity. Moreover, we observed that the release of cyanotoxins and microcystins (MCs), during the removal process using CF, could be efficiently prevented by a firm attachment of the M. aeruginosa cells without cell lysis. Our results suggest the possibility of controlling Cyano-HABs using a fabricated CF as a non-toxic and eco-friendly agent for scaled-up applications.

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Cell density dependence of Microcystis aeruginosa responses to copper algaecide concentrations: Implications for microcystin-LR release

Cited by 19 publications

References 20 publications

Effect of Phenyl-Acyl Compounds on the Growth, Morphology, and Toxin Production of Microcystis aeruginosa Kützing

Effect of Phenyl-Acyl Compounds on the Growth, Morphology, and Toxin Production of Microcystis aeruginosa Kützing

Bench-scale assessment of three copper-based algaecide products for cyanobacteria management in source water

Adsorption Strategy for Removal of Harmful Cyanobacterial Species Microcystis aeruginosa Using Chitosan Fiber

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