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    Diversity of archaea and detection of crenarchaeotal amoA genes in the rivers Rhine and Têt

    Access Status
    Open access via publisher
    Authors
    Herfort, L.
    Kim, J.
    Coolen, Marco
    Abbas, B.
    Schouten, S.
    Herndl, G.
    Damsté, J.
    Date
    2009
    Type
    Journal Article
    
    Metadata
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    Citation
    Herfort, L. and Kim, J. and Coolen, M. and Abbas, B. and Schouten, S. and Herndl, G. and Damsté, J. 2009. Diversity of archaea and detection of crenarchaeotal amoA genes in the rivers Rhine and Têt. Aquatic Microbial Ecology. 55 (2): pp. 189-201.
    Source Title
    Aquatic Microbial Ecology
    DOI
    10.3354/ame01294
    ISSN
    0948-3055
    URI
    http://hdl.handle.net/20.500.11937/10536
    Collection
    • Curtin Research Publications
    Abstract

    Pelagic archaeal phylogenetic diversity and the potential for crenarchaeotal nitrification of Group 1.1a were determined in the rivers Rhine and Têt by 16S rRNA sequencing, catalyzed reported deposition-fluorescence in situ hybridization (CARD-FISH) and quantification of 16S rRNA and functional genes. Euryarchaeota were, for the first time, detected in temperate river water even though a net predominance of crenarchaeotal phylotypes was found. Differences in phylogenic distribution were observed between rivers and seasons. Our data suggest that a few archaeal phylotypes (Euryarchaeota Groups RC-V and LDS, Crenarchaeota Group 1.1a) are widely distributed in pelagic riverine environments whilst others (Euryarchaeota Cluster Sagma-1) may only occur seasonally in river water. Crenarchaeota Group 1.1a has recently been identified as a major nitrifier in the marine environment and phylotypes of this group were also present in both rivers, where they represented 0.3% of the total pelagic microbial community. Interestingly, a generally higher abundance of Crenarchaeota Group 1.1a was found in the Rhine than in the Têt, and crenarchaeotal ammonia monooxygenase gene (amoA) was also detected in the Rhine, with higher amoA copy numbers measured in February than in September. This suggests that some of the Crenarchaeota present in river waters have the ability to oxidize ammonia and that riverine crenarchaeotal nitrification of Group 1.1a may vary seasonally. © Inter-Research 2009 .

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