Life history changes in the benthic cladoceran Chydorus piger induced by low concentrations of sediment-bound cadmium.

University of Amsterdam, Section Aquatic Ecology and Ecotoxicology, Kruislaan 320, 1098 SM Amsterdam, The Netherlands.
Aquatic Toxicology (Impact Factor: 3.51). 02/2002; 56(2):93-101. DOI: 10.1016/S0166-445X(01)00190-4
Source: PubMed

ABSTRACT The effect of sediment-bound cadmium on several life history parameters of the benthic cladoceran Chydorus piger, was tested in the laboratory. It was investigated whether a test with C. piger is an ecologically realistic alternative for the Daphnia test applied to sediments. Therefore, a culture of C. piger was exposed to a control and five cadmium concentrations, equilibrated with natural detritus (0.036, 0.063, 0.26, 0.55 and 1.0 mmol/kg). Continuous records of growth and reproduction were made which took as long as 20 weeks. Longevity of C. piger declined markedly from 112 days to 20 days as cadmium concentrations increased. Intrinsic rate of increase and age at first reproduction (AFR) tended to be stimulated at very low doses but this effect was not significant. However, they were negatively influenced by moderate cadmium levels. While a significant cadmium effect was found for all traits investigated, the effective doses of cadmium varied strongly. C. piger was found to be even more sensitive to cadmium than for example Daphnia and Hyalella, naturally occurring cadmium levels in detritus being effective to C. piger. Experiments with a benthic cladoceran can therefore give important information about the ecological effect of cadmium and possibly other toxicants deposited in sediments.

  • [Show abstract] [Hide abstract]
    ABSTRACT: With their global distribution, environmental persistence, and potential risk to human beings and ecosystems, poly- and perfluorinated compounds (PFCs) are of particular concern for research and regulatory communities. However, insufficient toxicity data are available for most poly- and perfluorinated compounds to assess their possible environmental hazards accurately. Therefore, the acute toxicity of seven poly- and perfluorinated carboxylic acids and alcohols on two cladocerans, Daphnia magna and Chydorus sphaericus, was evaluated in the present study. The adverse effects of these PFCs on these two cladocerans decreased with increasing fluorinated carbon chain length (nC) and quantitative structure-activity relationships were developed to quantify this observation. Because the 50% inhibition effects (EC50) values obtained are far above concentrations typically found in surface water, acute harmful effects of these chemicals to D. magna and C. sphaericus are not expected in the real environment.
    Environmental Toxicology and Chemistry 12/2011; 31(3):605-10. · 2.62 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Sediment quality guidelines and toxic equivalent factors have been used for assessment of the toxicity of sedimentary long-range atmospherically transported polycyclic aromatic hydrocarbons (PAHs) to the organisms living in high mountain European lakes. This method has provided indices that are consistent with experimental studies evaluating in situ sedimentary estrogenic activity or physiological response to AhR binding in fish from the same lakes. All examined lakes in north, central, west, northeast and southeast European mountains have shown sedimentary PAH concentrations that are above thresholds of no effect but only those situated in the southeast lakes district exhibited concentrations above the indices of probable effects. These mountains, Tatras, are also those having PAH concentrations of highest activity for AhR binding. Chrysene+triphenylene, dibenz[a]anthracene, benzo[k]fluoranthene and indeno[1,2,3-cd]pyrene are the main compounds responsible for the observed toxic effects.
    Ecotoxicology and Environmental Safety 05/2010; 73(4):559-64. · 2.20 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Routine chemical monitoring gives insight in the presence of contaminants in surface waters, but not in their joint ecological effects. Therefore ecological water quality is assessed with bioassays. Recently, a new bioassay using the chydorid Chydorus sphaericus has been developed. Working with smaller volumes, materials and being less time consuming than the traditional Daphnia magna test regarding the culture and experimental design, the 'Chydotox-test' shows a comparable sensitivity. The new Chydotox-test is a promising alternative for the existing Daphnia sp. acute immobilisation test (OECD 1984).