English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/149455
Share/Impact:
Statistics
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Abundance, frequency of dividing cells and growth rates of Synechococcus sp. (cyanobacteria) in the stratified Northwest Mediterranean Sea

AuthorsAgawin, Nona S. R. ; Agustí, Susana
Issue Date1997
PublisherOxford University Press
CitationJournal of Plankton Research 19 (11): 1599-1615 (1997)
AbstractThe abundance, frequency of dividing cells and growth rates of the planktonic cyano bacteria Synechococcus sp. during the summer of 1995 and 1996 were estimated in the Northwest Mediterranean Sea to test whether depth-dependent growth rates of this species explain its dominance in the deep chlorophyll maximum (DCM) layer formed during summer thermal stratification in the NW Mediterranean, compared to the surface layer. Abundance at the DCM layer (50–70 m) was up to two orders of magnitude greater than that at the surface, with values ranging from 1.7 to 13×106 cells I-1 and from 4 to 175 × 106 cells I-1 at the surface and in DCM waters, respectively. Gross growth rates, however, were much higher at the surface than in the DCM layer (surface: 0.76–1.07 day DCM: 0.30–0.47 day-1 The higher gross growth rates at the surface layer were supported by a higher frequency of dividing cells (surface: 0.09–0.24; DCM: 0.01–0.12). The negative correlation between the abundance or standing stock and growth rates of these planktonic picocyanobacteria points to losses, and not growth rate, as the main control on the abundance of Synechococcus. Although we provide some evidence that grazing alone may be able to account for these losses, further, direct determinations are clearly needed to elucidate the regulation of the abundance of Synechococcus in the NW Mediterranean.
DescriptionEste artículo contiene 17 páginas, 7 figuras, 1 tabla.
Publisher version (URL)https://doi.org/10.1093/plankt/19.11.1599
URIhttp://hdl.handle.net/10261/149455
ISSN0142-7873
Appears in Collections:(CEAB) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
 


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