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Titolo:
Importance of contamination history for understanding toxicity of copper to earthworm Eisenia fetica (Oligochaeta : Annelida), using neutral-red retention assay
Autore:
Scott-Fordsmand, JJ; Weeks, JM; Hopkin, SP;
Indirizzi:
Natl Environm Res Inst, Dept Terr Ecol, DK-8600 Silkeborg, Denmark Natl Environm Res Inst Silkeborg Denmark DK-8600 8600 Silkeborg, Denmark NERC, Inst Terr Ecol, Huntingdon PE17 2LS, Cambs, England NERC HuntingdonCambs England PE17 2LS untingdon PE17 2LS, Cambs, England Univ Reading, Sch Anim & Microbial Sci, Div Zool, Reading RG6 6AJ, Berks, England Univ Reading Reading Berks England RG6 6AJ eading RG6 6AJ, Berks, England
Titolo Testata:
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
fascicolo: 7, volume: 19, anno: 2000,
pagine: 1774 - 1780
SICI:
0730-7268(200007)19:7<1774:IOCHFU>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPRINGTAIL FOLSOMIA-CANDIDA; LUMBRICUS-RUBELLUS; SEXUAL DEVELOPMENT; SOILS; ZINC; CADMIUM; GROWTH; FIELD; APPLICABILITY; REPRODUCTION;
Keywords:
contamination history; earthworm; lysosomal biomarker; copper; neutral red;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Scott-Fordsmand, JJ Natl Environm Res Inst, Dept Terr Ecol, Vejlsovej 25,POB 314, DK-8600 Silkeborg, Denmark Natl Environm Res Inst Vejlsovej 25,POB 314 Silkeborg Denmark DK-8600
Citazione:
J.J. Scott-Fordsmand et al., "Importance of contamination history for understanding toxicity of copper to earthworm Eisenia fetica (Oligochaeta : Annelida), using neutral-red retention assay", ENV TOX CH, 19(7), 2000, pp. 1774-1780

Abstract

Eisenia fetida was exposed in the laboratory to a range of elevated soil copper (Cu) concentrations under two different contamination histories. An EC10 for reproduction was observed at 34 mg Cu/kg for soil spiked with Cu 1 d prior to running the experiment (newly spiked soil). Soil contaminated with Cu in the field more than 70 years previously (field-contaminated soil) caused a 10% decrease in reproduction at 248 mg Cu/kg. Survival and cocoon wet weights were not affected by soil concentrations up to 1,400 mg Cu/kg under either contamination history. Adult growth was reduced at 428 mg Cu/kg(EC10) in newly spiked soil but not in field-contaminated soil at concentrations up to 1,400 mg Cu/kg. The contamination history, as well as the toxicological parameter, was important in the interpretation of the outcome of a standard laboratory toxicity test. The lysosomal membrane stability of coelomocytes, measured as neutral-red retention time (NRR-time), was reduced at soil Cu concentrations lower than those affecting reproduction and demonstrated a dose-response relationship. The NRR-time was more severely reduced in worms exposed to newly Cu-spiked soil (EC10 = 8 mg Cu/kg) than worms exposed to field-contaminated soil (EC10 = 69 mg Cu/kg). The NRR-time reflected the bioactive Cu fraction, showing a good correlation with reproductionunder both contamination histories.

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Documento generato il 29/09/20 alle ore 17:24:59