Correlation between chlorophyll-a concentration and environmental factors in shallow lakes in plain river network areas of Suzhou

Ruan, Xinbo; Shi, Xiaodan; Zhao, Zhen‐Hua; Ni, Lixiao; Wu, Yun; Jiao, Tao

doi:10.18307/2008.0502

Cited by 10 publications

(2 citation statements)

References 5 publications

(1 reference statement)

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“…Algae are less efficient at photosynthesis under low-oxygen conditions, hindering their ability to utilize light energy for the reduction of chlorophyll-a concentrations. This limitation may stem from the constrained growth, metabolism, and photosynthetic activity of algae due to insufficient dissolved oxygen levels [33,34]. Therefore, both excessively low and high dissolved oxygen concentrations are detrimental to the effectiveness of solar-powered ultrasonic carbon fiber ecological floating-bed systems in algae removal.…”

Section: The Effect Of Influent Ph On the Variation In Chlorophyll-a ...mentioning

confidence: 99%

The Algicidal Potential of a Floating-Bed System against Microcystis aeruginosa in Laboratory Conditions

Zeng,

Liang,

Tang

et al. 2023

Water

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Harmful cyanobacterial blooms pose a major threat. Among them, Microcystis aeruginosa has raised serious concerns for human health due to its frequent occurrence. In this study, an ecological floating-bed system consisting of activated carbon fibers, aquatic plants (Ipomoea aquatica Forsskal), animals (Daphnia), and a solar-powered ultrasonic device was designed. The algae-killing efficiency, removal mechanism, and toxicological effects of the floating-bed system on Microcystis aeruginosa were determined under different conditions. The results showed that the average activity of algal cell dehydrogenase (DHA) was reduced by 64.09%, the average malondialdehyde (MDA) content was reduced to 0.125 μmol/L, and the average removal rate of soluble protein was 57.22% under optimal conditions (pH = 7, temperature = 25 °C, dissolved oxygen concentration = 5 mg/L, and hydraulic retention time = 36 h). Scanning electron microscopy (SEM) analysis showed that the structure within the cells of Microcystis aeruginosa was severely damaged after treatment with the solar-powered ultrasonic carbon fiber eco-floating-bed system. Fourier transform infrared (FTIR) spectroscopy analysis showed that the pyrrole ring of chlorophyll-a was degraded. In addition, a tadpole-based micronucleus test and a comet assay were conducted to assess cell viability and DNA damage in water samples treated with the floating-bed system, and the results confirmed that chromosome damage and genotoxicity were significantly reduced. These findings suggest that the floating-bed system is effective in destroying algal cells, leading to massive algal cell death and reducing the risk of secondary contamination. This study provides a new perspective for further research on ecological floating-bed technology, demonstrating its potential practical application in the prevention and control of cyanobacterial blooms.

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Section: The Effect Of Influent Ph On the Variation In Chlorophyll-a ...mentioning

confidence: 99%

The Algicidal Potential of a Floating-Bed System against Microcystis aeruginosa in Laboratory Conditions

Zeng,

Liang,

Tang

et al. 2023

Water

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“…It is reported that Chl-a is positively related with total nitrogen and phosphorus in the Lake Ulansuhai, Inner Mongolia, China, and relationships between Chl-a and TN, TP are further quantified by simple linear regressions [6]. Ruan et al [7] suggest that, for shallow lakes in the Suzhou areas on the lower reach of the Tai Lake, temperature, pH, dissolved oxygen and chemical oxygen demand are significantly and positively related with Chl-a concentration but no significant relationship is found between TN, TP and Chl-a.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Variation of Chlorophyll a and its Relationship with other Water Quality Factors in the Tai Lake

Liu

Wang

2011

AMR

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Algae bloom in the Tai Lake is a major issue and affects the water supply to the surrounding cities greatly. Chlorophyll a (Chl-a) is a common indicator that represent the trophic status in lakes. Spatial and temporal variations of Chl-a concentration are analyzed on the basis of sample data at 21 sites during the period of 2001 to 2005. Data at the sites located in the Meiliang Bay, Zhushan and Wulihu show greater fluctuations than that at other sites. A general trend showing that high values in northern part and low values in southern part of the Tai Lake is observed in seasonal mean values of Chl-a concentration for four seasons. Most high Chl-a concentrations occurred in summer (June to August) and autumn (September to November). Quantitative relationships between Chl-a and other water quality factors are investigated at all sites. Relative good relationships are obtained between Chl-a concentration and other water quality factors during 2001 to 2004 by using partial least squared regression. Prediction of Chl-a concentration in 2005 with above models produce worse results, which may be due to the occurrence of some extreme high values of Chl-a concentration in that year. Even though, acceptable predictions are obtained at several sites. Since the water quality in the lake is affected greatly by the inflow of nutrients from rivers, these relationships will be helpful for monitoring Chl-a variation with the combination of hydrological models that is able to simulate the inflow of nutrients.

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Changes in chlorophyll a and its response to nitrogen and phosphorus characteristics over the past three decades in Poyang Lake, China

Jia

et al. 2020

Ecohydrology

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In this study, we explore the relationship between changes in chlorophyll a (Chl a) content, total nitrogen (TN) and total phosphorus (TP) characteristics from 1989 to 2018 in Poyang Lake, China, by applying Landsat Thematic Mapper/Enhanced Thematic Mapper (TM/ETM) image data in combination with in situ monitoring data. Results showed that the average Chl a content in water over this 30‐year period was 5.77 μg/L. Although the water quality status of the lake was generally healthy, proportional Chl a content >10 μg/L (E10) has gradually increased, and the water quality in some areas of the lake has subsequently deteriorated over the past 30 years. Additionally, E10 was significantly positively correlated to the TN/TP. Changes in Chl a content were significantly positively correlated to the ratio of TN flux to TP flux from tributaries into the lake, but negatively correlated to TP flux. Results indicated that Lake can be categorized as phosphorus‐sufficient and nitrogen limited.

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Correlation between chlorophyll-a concentration and environmental factors in shallow lakes in plain river network areas of Suzhou

Cited by 10 publications

References 5 publications

The Algicidal Potential of a Floating-Bed System against Microcystis aeruginosa in Laboratory Conditions

The Algicidal Potential of a Floating-Bed System against Microcystis aeruginosa in Laboratory Conditions

Spatiotemporal Variation of Chlorophyll a and its Relationship with other Water Quality Factors in the Tai Lake

Changes in chlorophyll a and its response to nitrogen and phosphorus characteristics over the past three decades in Poyang Lake, China

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