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Ecotoxicity of Certain Heavy Metals Affecting Bacteria-Mediated Biogeochemical Pathways in Sediments

  • W. Reichardt
Part of the Environmental Science book series (ESE)

Abstract

Biogeochemical pathways of carbon turnover in sediments are mainly mediated by bacteria. From the early stages of their evolution on, these procaryotes have had to cope with elevated concentrations of non-essential and toxic heavy metals. As a result, effective mechanisms of resistance to heavy metal ions have evolved (Beveridge 1989). Ecotoxicity of heavy metals via the main biogeochemical pathways of assimilation and dissimilation of carbon in aquatic sediments, however, cannot simply be extrapolated from metal tolerance observed in physiological experiments using cultures. To obtain a realistic basis for ecological prognoses and ecotoxicological risk assessment, there is a need for integrated methods in microbiological analysis of sediment communities. These will have to be developed further and combined with ecophysiological experiments.

Keywords

Heavy Metal Thymidine Incorporation Environ Toxicol Appl Environ Heavy Metal Resistance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer-Verlag Berlin Heidelberg 1996

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  • W. Reichardt

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