Lesaulnier Céline auteur aut IRD Papamichail D. auteur aut IRD McCorkle S. auteur aut IRD Ollivier Bernard auteur aut IRD Skiena S. auteur aut IRD Taghavi S. auteur aut IRD Zak D. auteur aut IRD van der Lelie D. auteur aut IRD text journalArticle eng text/pdf born digital access The effects of elevated atmospheric CO2 (560 p.p.m.) and subsequent plant responses on the soil microbial community composition associated with trembling aspen was assessed through the classification of 6996 complete ribosomal DNA sequences amplified from the Rhinelander WI free-air CO2 and O-3 enrichment (FACE) experiments microbial community metagenome. This in-depth comparative analysis provides an unprecedented, detailed and deep branching profile of population changes incurred as a response to this environmental perturbation. Total bacterial and eukaryotic abundance does not change; however, an increase in heterotrophic decomposers and ectomycorrhizal fungi is observed. Nitrate reducers of the domain bacteria and archaea, of the phylum Crenarchaea, potentially implicated in ammonium oxidation, significantly decreased with elevated CO2. These changes in soil biota are evidence for altered interactions between trembling aspen and the microorganisms in its surrounding soil, and support the theory that greater plant detritus production under elevated CO2 significantly alters soil microbial community composition. specialized 074 10 4 926-941 2008 1462-2912 https://www.documentation.ird.fr/hor/fdi:010042504 10.1111/j.1462-2920.2007.01512.x 1462-2912 [F B010042504] https://www.documentation.ird.fr/hor/fdi:010042504 https://www.documentation.ird.fr/intranet/publi/2008/04/010042504.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2008-05-06 2017-08-23 fdi:010042504 fre