Data/hora: 11/06/2024 06:53:36

Provedor de dados: | 42
País: | Brazil
Título: | Bacterioplankton abundance, biomass and production in a Brazilian coastal lagoon and in two German lakes
Autores: | FURTADO,ANDRÉ L. S.; CASPER,PETER; ESTEVES,FRANCISCO A.
Data: | 2001-03-01
Ano: | 2001
Palavras-chave: | Bacterial production; Leucine incorporation; Tropical lagoon; Temperate lake.
Resumo: | The bacterioplanktonic abundance, biomass, and production within a tropical lagoon (Cabiúnas, Brazil) and two temperate lakes (Stechlin and Dagow, Germany) were compared. Bacterial abundance and production were significantly different among the three water bodies. The lowest bacterial production ( 0.8mug C l-1 d-1) was observed in the tropical Cabiúnas Lagoon despite its higher mean temperature and dissolved organic carbon concentration. Highest bacterioplankton abundance ( 2.6 x 10(9) cells l-1) and production ( 68.5mug C l-1 d-1) were measured in eutrophic Lake Dagow. In oligotrophic Lake Stechlin, the lowest bacterial biomass ( 48.05mug C l-1) was observed because of lower bacterial biovolume ( 0.248mum³) and lower bacterial abundance. Bacterial populations in the temperate lakes show higher activity (production/biomass ratio) than in the tropical lagoon. The meaning of isotopic dilution and leucine incorporation by non-bacterial micro-organisms were evaluated in the oligotrophic temperate system. Leucine uptake by non-bacterial micro-organisms did not have significant influence on bacterial production.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000100005
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/S0001-37652001000100005
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.73 n.1 2001
Fonte: | info:eu-repo/semantics/openAccess