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Toxicity and bioaccumulation of lead in marine protozoa communities.
Fernandez Leborans, G; Olalla Herrero, Y; Novillo, A.
Afiliação
  • Fernandez Leborans G; Departamento de Biología Animal I (Zoología), Facultad de Biología, Universidad Complutense, Madrid, Spain.
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.
Assuntos
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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
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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