Littoral diatoms as indicators of recent water and sediment contamination by metals in lakes

  • Cattaneo A
  • Couillard Y
  • Wunsam S
 et al. 
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We studied the response of benthic diatoms to recent metal contamination in littoral cores collected at 25 sites in 11 lakes situated at different distances from a smelter in the Rouyn-Noranda mining region (Quebec). Diatom response was described in terms of density, diversity, and taxonomic composition of the entire assemblages and as abundance of individual indicator taxa. Metal concentrations were measured in sediment and in the overlying water (as total dissolved and as free-ions). Sediment metal contamination was significantly higher in lakes located

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  • Antonella Cattaneo

  • Yves Couillard

  • Sybille Wunsam

  • Claude Fortin

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