Abstract


DIFFERENT ENVIRONMENTAL AND BIOGEOCHEMICAL ADAPTATION OF TOTAL AND ACTIVE BACTERIOPLANKTON COMMUNITIES ACROSS A LATITUDINAL GRADIENT IN THE NORTH SEA

We investigated bacterioplankton biomass production, amino acid (AA) and glucose turnover rates and community composition in the North Sea between 54° and 60° N in July. The community, assessed by 454-pyrosequencing of the V3-V5 region of the 16S rRNA (active) and its gene (total), was dominated by various subclusters of Flavobacteria and Alphaproteobacteria, mainly of the Roseobacter and SAR116 clades. The richness of the active was consistently higher than of the total community. Multivariate statistics revealed that the active community exhibited more correlations to biogeochemical and activity parameters than the total, including phaeopigments and turnover rates of AA and glucose. Applying a novel powerful approach to predict metabolic profiles from the phylogenetic affiliation of the 16S rRNA gene revealed a much greater functional diversity of the active as compared to the total community, mainly with respect to transporters of AA, carbohydrates, trace metals and vitamin B12. Further, these metabolic profiles of the active exhibited more correlations than of the total community to bacterial parameters including cell numbers, turnover rates of AA and biomass production.

Authors

Simon, M., ICBM, University of Oldenburg, Germany, m.simon@icbm.de

Wemheuer, B., University of Göttingen, Germany, bernd.wemheuer@biologie.uni-goettingen.de

Meier, D., University of Göttingen, Germany, dimitri.meier@biologie.uni-goettingen.de

Klempert, P., University of Göttingen, Germany, peggy.klempert@biologie.uni-goettingen.de

Wemheuer, F., University of Göttingen, Germany, frankziska.wemheuer@biologie.uni-goettingen.de

Billerbeck, S., ICBM, University of Oldenburg, Germany, sara.billerbeck@icbm.de

Giebel, H. A., ICBM, University of Oldenburg, Germany, giebel@icbm.de

Scherber, C., University of Göttingen, Germany, cscherber@gwdg.de

Daniel, R., University of Göttingen, Germany, rdaniel@gwdg.de

Details

Oral presentation

Session #:028
Date: 2/27/2015
Time: 16:00
Location: Machuca (Floor -2)

Presentation is given by student: No