First evidence for a bipolar distribution of dominant freshwater lake bacterioplankton

Pearce, David, Cockell, Charles, Lindström, Eva and Tranvik, Lars (2007) First evidence for a bipolar distribution of dominant freshwater lake bacterioplankton. Antarctic Science, 19 (02). pp. 245-252. ISSN 0954-1020

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Abstract

As a result of the recent application of DNA based technology to the investigation of maritime Antarctic freshwater lakes, patterns have begun to emerge in the bacterioplankton communities that dominate these systems. In this study, the bacterioplankton communities of five Antarctic and five Arctic freshwater lakes were assessed and compared with existing data in the literature, to determine whether emerging patterns in Antarctic lakes also applied to Arctic systems. Such a bipolar comparison is particularly timely, given the current interest in biogeography, the global distribution of microorganisms and the controversy over the global ubiquity hypothesis. In addition, it has recently been discovered that commonly encountered bacterial sequences, often originating from uncultivated bacteria obtained on different continents, form coherent phylogenetic freshwater clusters. In this study we encountered both identical sequences and sequences with a high degree of similarity among the bacterioplankton in lake water from both poles. In addition, Arctic freshwater lakes appeared to be dominated by some of the same groups of bacterioplankton thought to be dominant in Antarctic lakes, the vast majority of which represented uncultivated groups.

Item Type:	Article
Uncontrolled Keywords:	16S rRNA gene; bacteria; biogeography; clone library; cosmopolitan; DGGE; freshwater cluster
Subjects:	C500 Microbiology
Department:	Faculties > Health and Life Sciences > Applied Sciences
Depositing User:	Becky Skoyles
Date Deposited:	21 Dec 2015 13:19
Last Modified:	12 Oct 2019 17:30
URI:	http://nrl.northumbria.ac.uk/id/eprint/25144

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