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Bacterial and Archaeal Communities Variability Associated with Upwelling and Anthropogenic Pressures in the Protection Area of Arraial do Cabo (Cabo Frio region - RJ) Anais da ABC (AABC)
COELHO-SOUZA,SERGIO A.; ARAÚJO,FÁBIO V.; CURY,JULIANO C.; JESUS,HUGO E.; PEREIRA,GILBERTO C.; GUIMARÃES,JEAN R.D.; PEIXOTO,RAQUEL S.; DÁVILA,ALBERTO M.R.; ROSADO,ALEXANDRE S..
ABSTRACTUpwelling systems contain a high diversity of pelagic microorganisms and their composition and activity are defined by factors like temperature and nutrient concentration. Denaturing gradient gel electrophoresis (DGGE) technique was used to verify the spatial and temporal genetic variability of Bacteria and Archaea in two stations of the Arraial do Cabo coastal region, one under upwelling pressure and another under anthropogenic pressure. In addition, biotic and abiotic variables were measured in surface and deep waters from three other stations between these stations. Six samplings were done during a year and adequately represented the degrees of upwelling and anthropogenic pressures to the system. Principal Component Analysis (PCA) showed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial diversity; Leucine incorporation; Flow cytometry; Temperature; Nutrients availability; Brazilian Upwelling System.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401737
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Bacterioplankton abundance, biomass and production in a Brazilian coastal lagoon and in two German lakes Anais da ABC (AABC)
FURTADO,ANDRÉ L. S.; CASPER,PETER; ESTEVES,FRANCISCO A..
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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial production; Leucine incorporation; Tropical lagoon; Temperate lake.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000100005
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