Anais da Academia Brasileira de Ciências | |
Bacterioplankton abundance, biomass and production in a Brazilian coastal lagoon and in two German lakes | |
AndrÉ L. S. Furtado2  Peter Casper1  Francisco A. Esteves2  | |
[1] ,Universidade Federal do Rio de Janeiro I.B. Departamento de EcologiaRio de Janeiro,Brazil | |
关键词: bacterial production; leucine incorporation; tropical lagoon; temperate lake; produção bacteriana; incorporação de leucina; lagoa tropical; lagos temperados; | |
DOI : 10.1590/S0001-37652001000100005 | |
来源: SciELO | |
【 摘 要 】
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.
【 授权许可】
CC BY
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