BACTERIOPLANKTON COMPOSITION OF THE COASTAL UPWELLING SYSTEM OF “RÍA DE VIGO”, NW-SPAIN

Catalysed reported deposition-FISH and clone libraries indicated that Roseobacter, followed by Bacteroidetes, and some gammaproteobacterial groups such as SAR86, dominated the composition of bacterioplankton in Rı´a de Vigo, NW Spain, in detriment to SAR11 (almost absent in this upwelling ecosystem). The pronounced changes in the structure of each bacterioplankton component, particularly for the Roseobacter lineage could be associated with the characteristic phytoplankton communities of the four different hydrographical situations: winter mixing, spring bloom, summer stratification,and autumn upwelling.