Data/hora: 01/06/2024 08:31:21

Provedor de dados: | 5
País: | France
Título: | Seasonal and inter-annual variability of bacterioplankton biomass at station Kerfix, off Kerguelen Islands, Antarctica
Autores: | Delille, D.
Data: | 2003-06
Ano: | 2003
Palavras-chave: | Océan Antarctique; Biomasse bactérienne; Distribution verticale; Variations saisonnières; Variabilité interannuelle; Antarctic ocean; Bacterial biomass; Vertical distribution; Seasonal changes; Interannual variability.
Resumo: | Between January 1992 and March 1995, the research project Kerfix undertook the first regular non-coastal multiyear acquisition of parameters related to the carbon cycle in the Southern Ocean at a time series station located at 50degrees40'S-68degrees25'E, 110 km southwest of the Kerguelen Islands. I present here a general overview of the bacteriological data collected during this survey. Bacterioplankton biomass at Kerfix station was always significantly lower than in the direct vicinity of the Kerguelen Islands. Bacterial abundance decreased from surface to deepest layers (from 10(6) cells ml(-1) in surface layer to 5.0 x 10(4) cells ml(-1) at 1500 m). In contrast, mean cell volume (0.1 mum(3)) and proportion of free-living bacteria (80%) were relatively constant through the entire water column. The results suggest that a relatively low seasonal and inter-annual variability affect the total bacterial abundance, the mean cell volume and the percentage of free-living cells. The bacterial biomass is at least equivalent to that of phytoplankton in the surface layers. If integrated over the whole water column it reaches values higher than I g C m(-2), which are higher than the corresponding values of phototrophic biomass.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00321/43268/42999.pdf

DOI:10.1016/S0399-1784(03)00031-8

http://archimer.ifremer.fr/doc/00321/43268/

Editor: | Gauthier-villars/editions Elsevier
Formato: | application/pdf
Fonte: | Oceanologica Acta (0399-1784) (Gauthier-villars/editions Elsevier), 2003-06 , Vol. 26 , N. 3 , P. 225-229

Fonte:

2003 Éditions scientifiques et médicales Elsevier SAS and Ifremer/CNRS/IRD. All rights reserved.

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