Influence of climate change on the multi-generation toxicity to Enchytraeus crypticus of soils polluted by metal/metalloid mining wastes

  • S. Henrik Barmentlo /
  • Cornelis A.m. Van Gestel /
  • José álvarez-Rogel /
  • M. Nazaret González-Alcaraz
Journal ar
Environmental Pollution
  • Volumen: 222
  • Fecha: 01 January 2017
  • Páginas: 101-108
  • ISSN: 18736424 02697491
  • Source Type: Journal
  • DOI: 10.1016/j.envpol.2016.12.078
  • Document Type: Article
  • Publisher: Elsevier Ltd
© 2016 Elsevier Ltd This study aimed at assessing the effects of increased air temperature and reduced soil moisture content on the multi-generation toxicity of a soil polluted by metal/metalloid mining wastes. Enchytraeus crypticus was exposed to dilution series of the polluted soil in Lufa 2.2 soil under different combinations of air temperature (20 °C and 25 °C) and soil moisture content (50% and 30% of the soil water holding capacity, WHC) over three generations standardized on physiological time. Generation time was shorter with increasing air temperature and/or soil moisture content. Adult survival was only affected at 30% WHC (~30% reduction at the highest percentages of polluted soil). Reproduction decreased with increasing percentage of polluted soil in a dose-related manner and over generations. Toxicity increased at 30% WHC (>50% reduction in EC50in F0 and F1 generations) and over generations in the treatments at 20 °C (40¿60% reduction in EC50in F2 generation). At 25 °C, toxicity did not change when combined with 30% WHC and only slightly increased with 50% WHC. So, higher air temperature and/or reduced soil moisture content does affect the toxicity of soils polluted by metal/metalloid mining wastes to E. crypticus and this effect may exacerbate over generations.

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