Effects of climate change on the toxicity of soils polluted by metal mine wastes to Enchytraeus crypticus

  • M. Nazaret González-Alcaraz /
  • Eleni Tsitsiou /
  • Rosalie Wieldraaijer /
  • Rudo A. Verweij /
  • Cornelis A M Van Gestel
Journal ar
Environmental Toxicology and Chemistry
  • Volumen: 34
  • Número: 2
  • Fecha: 01 January 2015
  • Páginas: 346-354
  • ISSN: 15528618 07307268
  • Source Type: Journal
  • DOI: 10.1002/etc.2807
  • Document Type: Article
  • Publisher: Wiley Blackwell
© 2014 SETAC. The present study aimed to assess the effects of climate change on the toxicity of metal-polluted soils. Bioassays with Enchytraeus crypticus were performed in soils polluted by mine wastes (mine tailing, forest, and watercourse) and under different combinations of temperature (20°C and 25°C) and soil moisture content (50% and 30% of the soil water-holding capacity). Survival and reproduction were set as endpoints. No effect was observed on survival (average survival ¿ 80%). Reproduction was the most sensitive endpoint, and it was reduced between 65% and 98% compared with control after exposure to watercourse soil (lower pH, higher salinity, and higher available metal(loid) concentrations). In this soil, effective concentrations at 50% and 10% (EC50 and EC10) significantly decreased with decreasing soil moisture content. In general, the worst-case scenario was found in the driest soil, but the toxicity under a climate change scenario differed among soil types in relation to soil properties (e.g., pH, salinity) and available metal(loid) concentrations.

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