Accumulation and chronic toxicity of uranium over different life stages of the aquatic invertebrate Chironomus tentans

Archives of Environmental Contamination and Toxicology
Jorgelina R Muscatello, Karsten Liber

Abstract

Limited data are available on the effects of uranium (U) exposures on benthic macroinvertebrates, something that would be needed before national or provincial water quality guidelines could be developed. The goal of this study was to evaluate chronic U toxicity and accumulation in the aquatic invertebrate Chironomus tentans. Test organisms were exposed to three aqueous U concentrations (40, 200, and 1,000 microg/L) and an untreated control. Larval growth, adult emergence, and U tissue concentrations at different life stages were evaluated. The measured no-observed-effect concentration (NOEC) and lowest-observed-effect concentration (LOEC) for growth of C. tentans larvae after 10 days of U exposure were 39 and 157 microg/L, respectively. At U concentrations >157 ug/L, there was reduced larval growth of 30% to 40%, which corresponded to reduced adult emergence of 40% to 60%. Despite significant delays in time to adult emergence, there were no significant effects on reproductive output of successfully emerged adults. The F(1) generation C. tentans larvae that were never directly exposed to U, but originated from adult males and females exposed to U during their immature life stages, displayed a significant decrease in 10-day growt...Continue Reading

References

Jun 1, 1991·Bulletin of Environmental Contamination and Toxicology·B S Khangarot
Jan 1, 1989·Environmental Pollution·K R Timmermans, P A Walker
Oct 1, 1998·Trends in Ecology & Evolution·T A Mousseau, C W Fox

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Citations

Apr 10, 2013·Asian Pacific Journal of Tropical Biomedicine·Warrin EbauSalman Abdo Al-Shami
Jun 16, 2015·International Journal of Radiation Biology·Kailas D DatkhileBimalendu B Nath
Apr 3, 2012·The Science of the Total Environment·Christina L MogrenJohn T Trumble
Dec 22, 2009·Environmental Pollution·Jorgelina R Muscatello, Karsten Liber
Oct 28, 2019·Archives of Environmental Contamination and Toxicology·Melissa Bergmann, Manuel A S Graça
Jan 8, 2020·International Journal of Environmental Research and Public Health·Héctor Jirau-ColónBraulio Jiménez-Vélez
Dec 21, 2020·Marine Environmental Research·Lara Pedroso da FontouraDaniel Henrique Roos

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