Toxicity of Metal Cations for Daphnia

Фрумин, Г. Т.; Malysheva, N. A.

doi:10.1134/s1070363219130152

Cited by 3 publications

(1 citation statement)

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“…The theory of combined risk underlies the ecotoxicological approach to a comprehensive assessment of the toxicity of open reservoirs contaminated with metals, based on data on their maximum permissible content in fishery reservoirs and the lethal effect of these metals on daphnia. Using this approach, it is possible to assess the effects of metal pollution in reservoirs of different climatic zones, as well as to consider the factor of seasonal fluctuations in the content of metals in reservoirs [17,18]. The toxicity of water by biotesting using daphnia can be based on a change in their trophic activity against Chlorella, recorded by a change in the fluorescence signal of the latter [19].…”

Section: Introductionmentioning

confidence: 99%

The effect of manganese ions (II) on representatives of aquatic biota

Kosarev

Ivanov

Kamenets³

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The work is devoted to the consideration of the peculiarities of the impact of manganese (II) on representatives of freshwater biota. Manganese plays an important role in the aquatic environment, since it determines the course of the most important metabolic processes in hydrobiont organisms of varying degrees of organization. The analysis of processes involving manganese has shown that the main chemical factors affecting the accumulation of manganese in the aquatic environment are anaerobic biochemical processes caused by active silting of the riverbed due to the washout of organic substances from agricultural fields. The use of various physiological endpoints in daphnids is considered as an inexpensive and simple alternative, the criterion of which corresponds to the rule “replacement, reduction, refinement”. It has been shown that manganese (II) ions in the concentration range of 0.1-1000 LOCvr do not have an acute toxic effect on D. magna crustaceans, chronic toxicity is manifested in samples with concentrations of more than 10 LOCvr. The acute toxicity of solutions of manganese (II) salts in relation to S. Quadricauda was revealed by the change in the fluorescence level of microalgae at a concentration of Mn2+ from 0.05 mg/l.

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Section: Introductionmentioning

confidence: 99%