High Resistance of Resting Eggs of Cladoceran Moina macrocopa to the Effect of Heavy Metals
- Russian Academy of Sciences, Institute of Biophysics, Federal Research Centre Krasnoyarsk Scientific Centre, Siberian Branch (Russian Federation)
The research aimed to determine critical concentrations of heavy metals at which survival of resting eggs of the cladoceran Moina macrocopa is negatively affected. Resting eggs’ viability was not affected over a 30-days exposure towards copper, cadmium, zinc or nickel at concentrations up to 60–70 g/L. When resting eggs were exposed to sediment contaminated with heavy metals for 8 months, the hatching success was affected at 30 g copper/kg. Thus, resting eggs of Cladocera can tolerate heavy metals at concentrations that far exceed lethal concentrations of heavy metals to active life stage and exceed low or moderate levels of environmental pollution. Follow up investigation of life table parameters of hatchlings from resting eggs exposed to heavy metals demonstrated that neither lifespan nor fecundity of hatchlings differ from control animals. These results demonstrate that zooplankton may rapidly recover from resting egg bank once aquatic habitat becomes unpolluted.
- OSTI ID:
- 22933731
- Journal Information:
- Bulletin of Environmental Contamination and Toxicology, Vol. 102, Issue 3; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA); ISSN 0007-4861
- Country of Publication:
- United States
- Language:
- English
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