The relative importance of ecological drivers of arbuscular mycorrhizal fungal distribution varies with taxon phylogenetic resolution.

Autor: Roy J; Institut für Biologie, Ökologie der Pflanzen, Freie Universität Berlin, D-14195, Berlin, Germany.; Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), D-14195, Berlin, Germany., Mazel F; Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada., Sosa-Hernández MA; Institut für Biologie, Ökologie der Pflanzen, Freie Universität Berlin, D-14195, Berlin, Germany.; Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), D-14195, Berlin, Germany., Dueñas JF; Institut für Biologie, Ökologie der Pflanzen, Freie Universität Berlin, D-14195, Berlin, Germany.; Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), D-14195, Berlin, Germany., Hempel S; Institut für Biologie, Ökologie der Pflanzen, Freie Universität Berlin, D-14195, Berlin, Germany.; Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), D-14195, Berlin, Germany., Zinger L; Ecole Normale Supérieure, CNRS, Inserm, Institut de Biologie de l'Ecole Normale Supérieure (IBENS), PSL Research University, F-75005, Paris, France., Rillig MC; Institut für Biologie, Ökologie der Pflanzen, Freie Universität Berlin, D-14195, Berlin, Germany.; Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), D-14195, Berlin, Germany.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2019 Oct; Vol. 224 (2), pp. 936-948. Date of Electronic Publication: 2019 Sep 20.
DOI: 10.1111/nph.16080
Abstrakt: The phylogenetic depth at which arbuscular mycorrhizal (AM) fungi harbor a coherent ecological niche is unknown, which has consequences for operational taxonomic unit (OTU) delineation from sequence data and the study of their biogeography. We tested how changes in AM fungi community composition across habitats (beta diversity) vary with OTU phylogenetic resolution. We inferred exact sequence variants (ESVs) to resolve phylotypes at resolutions finer than provided by traditional sequence clustering and analyzed beta diversity profiles up to order-level sequence clusters. At the ESV level, we detected the environmental predictors revealed with traditional OTUs or at higher genetic distances. However, the correlation between environmental predictors and community turnover steeply increased at a genetic distance of c. 0.03 substitutions per site. Furthermore, we observed a turnover of either closely or distantly related taxa (respectively at or above 0.03 substitutions per site) along different environmental gradients. This study suggests that different axes of AM fungal ecological niche are conserved at different phylogenetic depths. Delineating AM fungal phylotypes using DNA sequences should screen different phylogenetic resolutions to better elucidate the factors that shape communities and predict the fate of AM symbioses in a changing environment.
(© 2019 The Authors. New Phytologist © 2019 New Phytologist Trust.)
Databáze: MEDLINE
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