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First evidence for a bipolar distribution of dominant freshwater lake bacterioplankton

Pearce, David A.; Cockell, Charles S.; Lindström, Eva S.; Tranvik, Lars J.. 2007 First evidence for a bipolar distribution of dominant freshwater lake bacterioplankton. Antarctic Science, 19 (2). 245-252. 10.1017/S0954102007000326

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Abstract/Summary

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: Publication - Article
Digital Object Identifier (DOI): 10.1017/S0954102007000326
Programmes: BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Long-Term Monitoring and Survey – Biological Sciences Division
ISSN: 0954-1020
Additional Keywords: 16S rRNA gene; bacteria; biogeography; clone library; cosmopolitan; DGGE; freshwater cluster
NORA Subject Terms: Biology and Microbiology
Zoology
Ecology and Environment
Date made live: 20 Oct 2011 09:47
URI: http://nora.nerc.ac.uk/id/eprint/11874

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