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Chronic ecotoxicity of mixtures of Cu, Zn, and Cd to the zebra mussel Dreissena polymorpha.
Ecotoxicol Environ Saf. 1993 Jun; 25(3):315-27.EE

Abstract

Organisms in contaminated freshwater ecosystems are often exposed to a variety of toxicants for their entire lifetime. To evaluate the ecological consequences of these long-term contaminations, the effects of mixtures of heavy metals on the filtration rate and survival of the freshwater mussel Dreissena polymorpha were studied during chronic exposure. In laboratory experiments, mussels were exposed to equitoxic mixtures of Cu + Zn, Cu + Cd, Zn + Cd, and Cu + Zn + Cd in concentrations causing a 50% decrease in filtration rate in short-term (48 hr) experiments. The filtration rate was measured once a week, during a 9- to 10-week exposure period. For all metal combinations effects on mortality increased when exposure time was prolonged from 48 hr to 9-10 weeks. In contrast, the effects on filtration rate did not increase, indicating that the filtration rate was related to the metal mixture concentration in the water, but not related to the metal concentrations in the mussels. Consequently, the effects on mortality and filtration rate were not related. In short-term experiments Cu + Cd were more than concentrations additive, whereas in chronic experiments Cu + Cd were strongly less than additive, indicating a loss of potential for additivity during prolonged exposure. In general, Cu, Zn, and Cd did not affect each others uptake. It was concluded that the chronic effects of mixtures could not be predicted from their short-term effects nor from the chronic effects of the metals tested individually.

Authors+Show Affiliations

Department of Aquatic Ecology, University of Amsterdam, The Netherlands.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

7691525

Citation

Kraak, M H., et al. "Chronic Ecotoxicity of Mixtures of Cu, Zn, and Cd to the Zebra Mussel Dreissena Polymorpha." Ecotoxicology and Environmental Safety, vol. 25, no. 3, 1993, pp. 315-27.
Kraak MH, Schoon H, Peeters WH, et al. Chronic ecotoxicity of mixtures of Cu, Zn, and Cd to the zebra mussel Dreissena polymorpha. Ecotoxicol Environ Saf. 1993;25(3):315-27.
Kraak, M. H., Schoon, H., Peeters, W. H., & van Straalen, N. M. (1993). Chronic ecotoxicity of mixtures of Cu, Zn, and Cd to the zebra mussel Dreissena polymorpha. Ecotoxicology and Environmental Safety, 25(3), 315-27.
Kraak MH, et al. Chronic Ecotoxicity of Mixtures of Cu, Zn, and Cd to the Zebra Mussel Dreissena Polymorpha. Ecotoxicol Environ Saf. 1993;25(3):315-27. PubMed PMID: 7691525.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chronic ecotoxicity of mixtures of Cu, Zn, and Cd to the zebra mussel Dreissena polymorpha. AU - Kraak,M H, AU - Schoon,H, AU - Peeters,W H, AU - van Straalen,N M, PY - 1993/6/1/pubmed PY - 1993/6/1/medline PY - 1993/6/1/entrez SP - 315 EP - 27 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 25 IS - 3 N2 - Organisms in contaminated freshwater ecosystems are often exposed to a variety of toxicants for their entire lifetime. To evaluate the ecological consequences of these long-term contaminations, the effects of mixtures of heavy metals on the filtration rate and survival of the freshwater mussel Dreissena polymorpha were studied during chronic exposure. In laboratory experiments, mussels were exposed to equitoxic mixtures of Cu + Zn, Cu + Cd, Zn + Cd, and Cu + Zn + Cd in concentrations causing a 50% decrease in filtration rate in short-term (48 hr) experiments. The filtration rate was measured once a week, during a 9- to 10-week exposure period. For all metal combinations effects on mortality increased when exposure time was prolonged from 48 hr to 9-10 weeks. In contrast, the effects on filtration rate did not increase, indicating that the filtration rate was related to the metal mixture concentration in the water, but not related to the metal concentrations in the mussels. Consequently, the effects on mortality and filtration rate were not related. In short-term experiments Cu + Cd were more than concentrations additive, whereas in chronic experiments Cu + Cd were strongly less than additive, indicating a loss of potential for additivity during prolonged exposure. In general, Cu, Zn, and Cd did not affect each others uptake. It was concluded that the chronic effects of mixtures could not be predicted from their short-term effects nor from the chronic effects of the metals tested individually. SN - 0147-6513 UR - https://www.unboundmedicine.com/medline/citation/7691525/Chronic_ecotoxicity_of_mixtures_of_Cu_Zn_and_Cd_to_the_zebra_mussel_Dreissena_polymorpha_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147651383710298 DB - PRIME DP - Unbound Medicine ER -