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    Recently identified microbial guild mediates soil N2O sink capacity

    Date
    2014
    Author
    Jones CM
    Spor A
    Brennan FP
    Breuil M-C
    Bru D
    Lemanceau P
    Griffiths BS
    Hallin S
    Philippot L
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    Abstract
    Nitrous oxide (N2O) is the predominant ozone-depleting substance and contributes approximately 6% to overall global warming1,2. Terrestrial ecosystems account for nearly 70% of total global N2O atmospheric loading, of which at least 45% can be attributed to microbial cycling of nitrogen in agriculture3. The reduction of N2O to nitrogen gas by microorganisms is critical for mitigating its emissions from terrestrial ecosystems, yet the determinants of a soil’s capacity to act as a source or sink for N2O remain uncertain4. Here, we demonstrate that the soilN2Osink capacity is mostly explained by the abundance and phylogenetic diversity of a newly described N2O-reducing microbial group5,6, which mediate the influence of edaphic factors. Analyses of interactions and niche preference similarities suggest niche di erentiation or even competitive interactions between organisms with the twotypes of N2O reductase.We further identified several recurring communities comprised of co-occurring N2O-reducing bacterial genotypes that were significant indicators of the soil N2O sink capacity across di erent European soils.
    Journal Title/Title of Proceedings
    Nature Climate Change
    Volume/Issue Number
    4
    Page Numbers
    801‐805
    URI
    http://dx.doi.org/10.1038/NCLIMATE2301
    http://hdl.handle.net/11262/10491
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