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Titre du document / Document title

Accumulation of selenium in a model freshwater microbial food web

Auteur(s) / Author(s)

SANDERS R. W. (1) ; GILMOUR C. C. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Acad. natural sci., Patrick cent. environmental res., Philadeophia PA 19103, ETATS-UNIS

Résumé / Abstract

The transfer of selenium between bacteria and the ciliated protozoan, Paramecium putrinum, was examined in laboratory cultures. The population growth of the ciliate was not inhibited in the presence of the highest concentrations of dissolved selenite or selenate tested (103 μg liter-1). Experiments with radioactive 75selenite or 75selenate indicated that accumulation of selenium by ciliates through time was low when feeding and metabolism were reduced by incubating at 0oC. However, selenium accumulated in ciliate biomass during incubation with dissolved 75Se and bacteria at 24oC and also when bacteria prelabeled with 75Se were offered as food in the absence of dissolved selenium

Revue / Journal Title

Applied and environmental microbiology    ISSN  0099-2240   CODEN AEMIDF 

Source / Source

1994, vol. 60, no8, pp. 2677-2683 (43 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Society for Microbiology, Washington, DC, ETATS-UNIS  (1976) (Revue)

Mots-clés anglais / English Keywords

Selenium

;

Biological accumulation

;

Inorganic element

;

Toxicity

;

Water pollution

;

Microorganism culture

;

Radioactive tracers

;

Freshwater environment

;

Trophic chain

;

Bacteria

;

Trophic relation

;

Ecotoxicology

;

Ciliata

;

Protozoa

;

Mots-clés français / French Keywords

Sélénium

;

Accumulation biologique

;

Elément minéral

;

Toxicité

;

Pollution eau

;

Culture microorganisme

;

Traceur radioactif

;

Milieu dulçaquicole

;

Chaîne alimentaire

;

Bactérie

;

Relation trophique

;

Ecotoxicologie

;

Paramecium putrinum

;

Ciliata

;

Protozoa

;

Mots-clés espagnols / Spanish Keywords

Selenio

;

Acumulación biológica

;

Elemento inorgánico

;

Toxicidad

;

Contaminación agua

;

Cultivo microorganismo

;

Trazador radioactivo

;

Medio dulceacuícola

;

Cadena alimenticia

;

Bacteria

;

Relación trófica

;

Ecotoxicología

;

Ciliata

;

Protozoa

;

Localisation / Location

INIST-CNRS, Cote INIST : 7195, 35400004068566.0020

Nº notice refdoc (ud4) : 4163939



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