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Fluoride accumulation and toxicity in wild small mammals.

I C Boulton1, J A Cooke, M S Johnson

  • 1Ecology Centre, School of Environment, University of Sunderland, Sunderland, UK.

Environmental Pollution (Barking, Essex : 1987)
|January 1, 1994
PubMed
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Small mammals in fluoride-contaminated grasslands showed higher skeletal fluoride levels and severe dental lesions. Fluoride speciation influenced bioassimilation and damage severity in field voles and bank voles.

Area of Science:

  • Environmental toxicology
  • Mammalogy
  • Ecotoxicology

Background:

  • Industrial activities release fluoride into the environment, posing risks to wildlife.
  • Small mammals like voles are sensitive indicators of ecosystem health.
  • Fluoride exposure can impact skeletal and dental health.

Purpose of the Study:

  • To assess fluoride concentrations in skeletal tissues of voles.
  • To investigate morphological dental changes in voles exposed to industrial fluoride.
  • To determine the relationship between fluoride speciation and bioassimilation in small mammals.

Main Methods:

  • Field vole (Microtus agrestis L.) and bank vole (Clethrionomys glareolus L.) populations were sampled from grasslands with varying industrial fluoride contamination.

Related Experiment Videos

  • Fluoride concentrations in skeletal tissues (bones and teeth) were analyzed.
  • Dental morphology, specifically incisor and molar teeth, was examined for lesions and abnormalities.

    • Main Results:

    • Fluoride concentrations in teeth and bones were significantly higher in bank voles compared to field voles at chemical works and smelter sites.
    • Both species exhibited severe dental lesions at chemical works and smelter sites, with less pronounced damage near mine tailings.
    • Inter-site variations in fluoride speciation correlated with observed bioassimilation and dental damage.

    Conclusions:

    • Fluoride contamination from industrial sources significantly impacts vole populations.
    • Bank voles accumulate higher fluoride levels than field voles in contaminated environments.
    • Fluoride speciation is a critical factor determining its bioavailability and toxic effects on small mammal dentition.