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We examined the dynamics of the free-living bacterial community in the Ria de Aveiro estuary (Portugal) using 16S rDNA PCR–denaturing gradient gel electrophoresis (DGGE). Samples were collected along the salinity gradient in April, July and October 2003 and January 2004. Analysis of DGGE profiles indicated that the compositional shifts within this community occurred between the brackish and freshwater...
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