Toxicity and bioaccumulation of lead in marine protozoa communities.
Ecotoxicol Environ Saf
; 39(3): 172-8, 1998 Mar.
Article
em En
| MEDLINE
| ID: mdl-9570907
The toxicity and bioaccumulation of lead has been studied using marine protozoa communities developed in laboratory microecosystems. The concentrations tested were 500 and 1000 micrograms.L-1 of lead as lead acetate. The protozoan was able to bioaccumulate 27.02-504 micrograms Pb.g-1 dry weight. Bacteria also bioaccumulated lead, but always to a lesser degree than protozoa. Lead caused a significant reduction in the density of protozoa, which could be an indirect response to the cellular increase of lead. On the other hand, the toxicant did not determine a decrease in the number of bacterial cells; this could be due to their capacity to bioaccumulate a lesser amount of lead, the increase in the number of dead cells, and the elimination of their predators by the toxicant. After 120 h, a recovery of the community was observed.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Bactérias
/
Poluentes Químicos da Água
/
Cilióforos
/
Eucariotos
/
Chumbo
Limite:
Animals
País/Região como assunto:
Europa
Idioma:
En
Revista:
Ecotoxicol Environ Saf
Ano de publicação:
1998
Tipo de documento:
Article
País de afiliação:
Espanha