Journal
FEMS MICROBIOLOGY ECOLOGY
Volume 54, Issue 2, Pages 257-267Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.femsec.2005.04.005
Keywords
Alexandrium; bacterioplankton; phylogenetic diversity; functional diversity; BIOLOG; DGGE
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The phylogenetic and functional diversity of the bacterioplankton assemblage associated with blooms of toxic Alexandrium spp. was studied in three harbours of the NW Mediterranean. Denaturing gradient gel electrophoresis and DNA sequence analysis revealed the presence of a bacterium within the Roseobacter clade related to the presence of Alexandrium cells. Phylogenetic diversity was affected by the presence of Alexandrium spp., geographic situation and seasonality. In contrast, functional diversity, assessed with Biolog plates, was clearly affected by seasonality, but not by the presence of Alexandrium, indicating that the presence of the bacterium associated with the blooms was not enough to modify the metabolic pattern of the bacterioplankton assemblage. (C) 2005 Federation of European Microbiological Societies. Pliblished by Elsevier B.V. All rights reserved.
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