Materia orgánica reduce la toxicidad del cobre para la lombriz Eisenia fetida en suelos de áreas mineras en Chile Central

Gonzalo Ávila, Hernán Gaete, Sébastien Sauvé, Alexander Neaman

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

15 Citas (Scopus)

Resumen

The Aconcagua River basin (Central Chile) is one of the most important agricultural areas in the country. However, several copper (Cu) mining operations are located in the basin. The objective of the study was to determine Cu toxicity for the earthworm Eisenia fetida (Savigny 1826) in the agricultural soils of the basin. We determined the production of cocoons and juveniles of earthworms in the studied soils. The soils differed in the concentrations of organic matter (OM, range 2-6%), pH (range 7.3-8.3), texture (from loamy sand to clay loam), and total Cu concentrations (range 230-960 mg kg-1). Concentrations of Cu and OM in the soils were the variables that determined the earthworms' biological response. In contrast, pH and texture did not affect this response. Cocoon and juvenile production decreased considerably in soils with elevated Cu concentrations (> 500 mg kg-1), regardless of OM concentrations. Cocoon production decreased in the soils with Cu concentrations below 500 mg kg-1 when OM concentrations were below 3.5%. In contrast, cocoon production did not vary when OM concentrations were above 3.5%. The same effect of OM was observed on juvenile production. In this case, the threshold for OM concentration was 2.5%. It was concluded that it is important to consider OM concentrations in order to predict the biological response of earthworms in these soils.

Título traducido de la contribuciónOrganic matter reduces copper toxicity for the earthworm Eisenia fetida in soils from mining areas in central chile
Idioma originalEspañol
Páginas (desde-hasta)252-259
Número de páginas8
PublicaciónChilean Journal of Agricultural Research
Volumen69
N.º2
DOI
EstadoPublicada - 2009
Publicado de forma externa

Palabras clave

  • Aconcagua River
  • Cu mining
  • Ecological risk assessment
  • Eisenia fetida
  • Trace elements

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