English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/26797
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Bacterial assemblage structure and carbon metabolism along a productivity gradient in the NE Atlantic Ocean

AuthorsAlonso-Sáez, Laura ; Arístegui, Javier; Pinhassi, Jarone; Gómez-Consarnau, Laura; González, José M.; Vaqué, Dolors ; Agustí, Susana ; Gasol, Josep M.
Atlantic Ocean
Issue Date19-Jan-2007
PublisherInter Research
CitationAquatic Microbial Ecology 46(1): 43-53 (2007)
AbstractBacterioplankton have the potential to significantly affect the cycling of organic matter in the ocean; however, little is known about the linkage between bacterial assemblage structure and carbon metabolism. In this study, we investigated whether changes in the phylogenetic composition of bacterioplankton were associated with changes in bacterial carbon processing (bacterial production, respiration and biomass) in the subtropical NE Atlantic Ocean. We found consistent differences in the composition of the bacterial assemblage, as revealed by denaturing gradient gel electrophoresis (DGGE) and catalyzed reporter deposition-fluorescence in situ hybridization (CARD-FISH), along a gradient from the NW African upwelling to the oligotrophic North Atlantic Subtropical Gyre. The percent contribution of Bacteroidetes, Roseobacter and Gammaproteobacteria significantly increased towards more productive waters, whereas the SAR11 clade of the Alphaproteobacteria remained relatively constant (average 28% of DAPI-stained cells) throughout the area. Changes in the composition of the bacterial assemblage detected by DGGE were weakly but significantly correlated with changes in carbon processing variables. The abundances of Roseobacter and Gammaproteobacteria were highly correlated with the concentration of particulate organic carbon and chlorophyll a, reflecting the affinity of these groups to nutrient-enriched conditions. The abundance of Roseobacter was also positively correlated with heterotrophic bacterial production, suggesting their active participation in carbon processing
Description11 pages, 4 figures, 3 tables
Publisher version (URL)http://dx.doi.org/10.3354/ame046043
Appears in Collections:(IMEDEA) Artículos
(ICM) Artículos
Files in This Item:
File Description SizeFormat 
Alonso_et_al_2007.pdf275,1 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.