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

Translated title of the contribution: Organic matter reduces copper toxicity for the earthworm Eisenia fetida in soils from mining areas in central chile

Gonzalo Ávila, Hernán Gaete, Sébastien Sauvé, ALEXANDER NEAMAN

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

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.

Translated title of the contributionOrganic matter reduces copper toxicity for the earthworm Eisenia fetida in soils from mining areas in central chile
Original languageSpanish
Pages (from-to)252-259
Number of pages8
JournalChilean Journal of Agricultural Research
Volume69
Issue number2
DOIs
StatePublished - 1 Jan 2009

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