AME 51:55-66 (2008)  -  DOI:

Novel estuarine bacterioplankton in rRNA operon libraries from the Chesapeake Bay

Jinjun Kan1,3, Sarah E. Evans2, Feng Chen1, Marcelino T. Suzuki2,*

1Center of Marine Biotechnology, University of Maryland Biotechnology Institute, Baltimore, Maryland 21202, USA
2Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, Solomons, Maryland 20688, USA
3Present address: Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA
*Corresponding author. Email:

ABSTRACT: Compared to open oceans and freshwater systems, less is known about the phylogenetic diversity in temperate estuaries. In the present study, 6 rRNA operon libraries constructed along the salinity gradient in the Chesapeake Bay in 2 different seasons were analyzed and sequenced. Phylogenetic analyses showed that Chesapeake Bay bacterioplankton represented a mixture of typical marine and freshwater clades, but several groups that had not been previously retrieved from either system were also found in the bay. Unique or novel SAR11 (Pelagibacter ubique), Roseobacter, SAR86 and Actinobacteria subclades present in the bay suggested that these microorganisms might be adapted to large temperate estuaries with long residence times, such as the Chesapeake Bay. These results represent the first comprehensive study of phylogenetic diversity in estuaries with long residence times.

KEY WORDS: Phylogenetic analysis · rRNA operon libraries · Estuarine bacterioplankton

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Cite this article as: Kan J, Evans SE, Chen F, Suzuki MT (2008) Novel estuarine bacterioplankton in rRNA operon libraries from the Chesapeake Bay. Aquat Microb Ecol 51:55-66.

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