Ecological Risk Assessment

Landis, Wayne G.; Sofield, Ruth M.; Yu, Ming‐Ho

doi:10.1201/9781315117867-15

Cited by 4 publications

(3 citation statements)

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“…The mercury accumulation increased along with the enhancement of exposure time and mercury concentration which has a bond with proteins [19]. The rate of metabolism and mercury concentration in the water environment was more critical than the organism's age in the process of mercury bioaccumulation [20]. Observations of some marine and freshwater species indicated that the total mercury concentration in the body tissues of fish was increasing simultaneously with the enhancement of age, weight, and long-body fish [19,21].…”

Section: Resultsmentioning

confidence: 99%

The removal of mercury using Penicillium sp. strain A4 and its toxic effects on fish

Dewi

Yoga²,

Andriyani³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Mercury (Hg) is a heavy metal that is commonly found in waters and sediments. Mercury and its derivatives are highly toxic). Their presence in the aquatic environment can be very detrimental. Aspergillus fungi are known to reduce Hg levels in pollutants. Our research aim was to evaluate the toxic effect of Hg after being reduced by local isolates of Penicillium sp. strain A4. A toxicity test was conducted on juvenile Caroline platyfish (Xiphophorus maculatus). The research was conducted by growing fungal isolates on potato dextrose broth (PDB) medium with the addition of Hg at 7 days of incubation. The Hg concentration was measured before and after the incubation. The acute toxicity test was conducted with two serial concentrations: 50% and 100% of PDB-Hg media from fungal removal, as well as one control. The acute toxicity test was carried out for 48 hours and the number of deaths of Xiphophorus maculatus was counted. The results showed a decrease of mercury concentration from 3.14 ppm to 0.797 ppm in PDB-Hg media on the activity of isolates of Penicillium sp. strain A4 resulting in 74.6% mercury removal. Acute toxicity test results showed that concentrations of 50% and 100% of PDB-Hg media caused 100% death of the fish. The results of this study can be used as initial data to determine the quality criteria for waste containing mercury that can be discharged into river bodies and strategies for using fungi applications using local isolates of Penicillium sp. strain A4, which has the potential for wastewater treatment before being discharged into the waters to reduce its toxic effects.

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Section: Resultsmentioning

confidence: 99%

The removal of mercury using Penicillium sp. strain A4 and its toxic effects on fish

Dewi

Yoga²,

Andriyani³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Genome-wide analyses in yeast have been successfully used to identify the genes responsible for yeast response and resistance to environmental stress, in particular those induced by xenobiotic compounds of agricultural interest, such as the herbicide sulfometuron methyl (Jia et al, 2000), the dithiocarbamate fungicides mancozeb (Dias et al, 2010;Santos et al, 2009), thiuram, zineb and maneb (Kitagawa et al, 2003), the benzimidazole fungicide benomyl (Lucau-Danila et al, 2005), the pesticide lindane (Parveen et al, 2003), and the herbicide 2,4-D Teixeira et al, 2006;. Even though many cytotoxic compounds used in agriculture may act in their target organisms via physiological mechanisms that do not exist in yeast, many of the basic mechanisms underlying resistance and adaptation to chemical and environmental stresses are apparently conserved among phylogenetically distant organisms (Landis & Yu, 1999).…”

Section: S Cerevisiae and A Thaliana As Model Organisms To Study Herb...mentioning

confidence: 99%

Herbicides and the Environment

Zimdahl,

Basinger

2024

Fundamentals of Weed Science

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“…Fish and crustaceans are considered suitable bioindicators to estimate the amount of damage caused by pollution in different aquatic environments (Borkovicet et al., 2008 ; Farombiet et al., 2007 ). Cadmium is one of the most toxic metals (after mercury, the second most toxic metal) to aquatic organisms, the most common of which is soluble in seawater (Landis et al., 2011 ). Normally, the metal does not decompose in organisms, sediments or other components of aquatic ecosystems, and in the case of cadmium exposure, the highest accumulation of the metal could be in the gills, liver and kidneys (Mc Geer et al., 2000 ).…”

Section: Introductionmentioning

confidence: 99%

Gill alterations of whiteleg shrimp (Litopenaeus vannamei) exposed to cadmium under different experimental salinities

Ehsani,

Movahedinia,

Abdi

et al. 2024

Veterinary Medicine & Sci

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BackgroundHeavy metals are one of the most important environmental pollutants in marine coastal ecosystems. Cadmium is a heavy metal that enters to marine environments via industrial wastes and oil production activities.ObjectivesThis study were done to determine the toxicity of cadmium to Litopenaeus vannamei and to evaluate the histological changes in gill tissues after exposure to sublethal concentrations of cadmium at different salinities.MethodsFor this reason, toxicity test was done to determine the lethal concentration (LC50) of cadmium for whiteleg shrimp. According to the calculated LC50 amount, sublethal doses of cadmium were used to determine its histological effects in different salinity during 2 weeks exposing period.ResultsLC50 of cadmium for 96 h for whiteleg shrimp was 6.56 mg/L. Histological alterations in the gill were observed in L. vannamei after 14 days exposure to different concentrations of cadmium and salinity. Histopathological index was increased in a dose‐dependent manner.ConclusionOur findings showed that doses lower than 2 mg/L have repairable effects on gill structure, but the concentration of 2 mg/L cadmium leaves irreparable and destructive effects on the gill tissue.

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Ecological Risk Assessment

Cited by 4 publications

References 1 publication

The removal of mercury using Penicillium sp. strain A4 and its toxic effects on fish

The removal of mercury using Penicillium sp. strain A4 and its toxic effects on fish

Herbicides and the Environment

Gill alterations of whiteleg shrimp (Litopenaeus vannamei) exposed to cadmium under different experimental salinities

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