This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Supplemental material
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Riemann, L.
Right arrow Articles by Hagström, A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Riemann, L.
Right arrow Articles by Hagström, A.
Agricola
Right arrow Articles by Riemann, L.
Right arrow Articles by Hagström, A.

 Previous Article  |  Next Article 

Applied and Environmental Microbiology, January 2008, p. 503-515, Vol. 74, No. 2
0099-2240/08/$08.00+0     doi:10.1128/AEM.01983-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

The Native Bacterioplankton Community in the Central Baltic Sea Is Influenced by Freshwater Bacterial Species{triangledown} ,{dagger}

L. Riemann,1* C. Leitet,1 T. Pommier,1,{ddagger} K. Simu,1 K. Holmfeldt,1 U. Larsson,2 and Å. Hagström1

Department of Natural Sciences, Kalmar University, 39182 Kalmar, Sweden,1 Department of Systems Ecology, Stockholm University, 10691 Stockholm, Sweden2

Received 29 August 2007/ Accepted 9 November 2007

The Baltic Sea is one of the largest brackish environments on Earth. Despite extensive knowledge about food web interactions and pelagic ecosystem functioning, information about the bacterial community composition in the Baltic Sea is scarce. We hypothesized that due to the eutrophic low-salinity environment and the long water residence time (>5 years), the bacterioplankton community from the Baltic proper shows a native "brackish" composition influenced by both freshwater and marine phylotypes. The bacterial community composition in surface water (3-m depth) was examined at a single station throughout a full year. Denaturing gradient gel electrophoresis (DGGE) showed that the community composition changed over the year. Further, it indicated that at the four extensive samplings (16S rRNA gene clone libraries and bacterial isolates from low- and high-nutrient agar plates and seawater cultures), different bacterial assemblages associated with different environmental conditions were present. Overall, the sequencing of 26 DGGE bands, 160 clones, 209 plate isolates, and 9 dilution culture isolates showed that the bacterial assemblage in surface waters of the central Baltic Sea was dominated by Bacteroidetes but exhibited a pronounced influence of typical freshwater phylogenetic groups within Actinobacteria, Verrucomicrobia, and Betaproteobacteria and a lack of typical marine taxa. This first comprehensive analysis of bacterial community composition in the central Baltic Sea points to the existence of an autochthonous estuarine community uniquely adapted to the environmental conditions prevailing in this brackish environment.

* Corresponding author. Mailing address: Department of Natural Sciences, Kalmar University, S-391 82 Kalmar, Sweden. Phone: 46 480 447334. Fax: 46 480 447340. E-mail: Lasse.Riemann{at}hik.se

{triangledown} Published ahead of print on 26 November 2007.

{dagger} Supplemental material for this article may be found at http://aem.asm.org/.

{ddagger} Present address: Institut de Ciènces del Mar., CSIC, 08003 Barcelona, Spain.

Applied and Environmental Microbiology, January 2008, p. 503-515, Vol. 74, No. 2
0099-2240/08/$08.00+0     doi:10.1128/AEM.01983-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.





Copyright © 2009 by the American Society for Microbiology.   For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»