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Population Dynamics of Bacterioplanktonic Component Associated with the Phytoplankton Biomass in Kongsfjorden, an Arctic Fjord


Affiliations
1 National Centre for Antarctic and Ocean Research, Head Land Sada, Vasco-da-Gama 403 804, India
2 Department of Biotechnology, Goa University, Taliegao Plateau 403 206, India
 

Temporal variation (June and October 2012) in bacterial and phytoplankton communities of Kongsfjorden was studied using 16S rRNA gene clone libraries and marker pigments respectively. Proteobacteria was the dominant phyla in Kongsfjorden with Gammaproteobacteria (42%) and Alphaproteobacteria (84%) dominating in June and October, respectively. Retrieval of sequences affiliated to Verrucomicrobia, Gammaproteobacteria and Bacteroidetes in June corresponded with high autotrophic biomass (Chl α, 33 ng l–1) whereas abundance of SAR 11 coincided with decrease in the intensity of autotrophic biomass (Chl α, 24 ng l–1) in October. Thus, the distribution of bacterioplankton community varied with change in phytoplankton composition indicating a significant coupling between these two groups in the fjord water.

Keywords

Arctic, Bacterial Diversity, Kongsfjorden, Phytoplankton Pigments.
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  • Population Dynamics of Bacterioplanktonic Component Associated with the Phytoplankton Biomass in Kongsfjorden, an Arctic Fjord

Abstract Views: 378  |  PDF Views: 124

Authors

Rupesh Kumar Sinha
National Centre for Antarctic and Ocean Research, Head Land Sada, Vasco-da-Gama 403 804, India
K. P. Krishnan
National Centre for Antarctic and Ocean Research, Head Land Sada, Vasco-da-Gama 403 804, India
Savita Kerkar
Department of Biotechnology, Goa University, Taliegao Plateau 403 206, India

Abstract


Temporal variation (June and October 2012) in bacterial and phytoplankton communities of Kongsfjorden was studied using 16S rRNA gene clone libraries and marker pigments respectively. Proteobacteria was the dominant phyla in Kongsfjorden with Gammaproteobacteria (42%) and Alphaproteobacteria (84%) dominating in June and October, respectively. Retrieval of sequences affiliated to Verrucomicrobia, Gammaproteobacteria and Bacteroidetes in June corresponded with high autotrophic biomass (Chl α, 33 ng l–1) whereas abundance of SAR 11 coincided with decrease in the intensity of autotrophic biomass (Chl α, 24 ng l–1) in October. Thus, the distribution of bacterioplankton community varied with change in phytoplankton composition indicating a significant coupling between these two groups in the fjord water.

Keywords


Arctic, Bacterial Diversity, Kongsfjorden, Phytoplankton Pigments.

References





DOI: https://doi.org/10.18520/cs%2Fv115%2Fi9%2F1690-1694