Temperature and pH define the realized niche space of arbuscular mycorrhizal fungi

Davison John, Moora Mari, Semchenko Marina, Binte Adenan Sakeenah, Ahmed Talaat, Akhmetzhanova Asem A., Atalalo Juha M., Al-Quraishy Saleh, Andriyanova Elena, Anslan Sten, Bahram Mohammad, Batbaatar Amgaa, Brown Charlotte, Bueno C. Guillermo, Cahill James, Cantero Juan José, Casper Brenda B., Cherosov Mikhail, Chideh Saida, Coelho Ana P., Coghill Matthew, Decocq Guillaume, Dudov Sergey, Fabiano Ezequiel Chimbioputo, Fedosov Vladimir E., Fraser Lauchlan, Glassman Sydney I., Helm Aveliina, Henry Hugh A.L., Herault Bruno, et al.. 2021. Temperature and pH define the realized niche space of arbuscular mycorrhizal fungi. New Phytologist, 231 (2) : 763-776.

Quartile : Outlier, Sujet : PLANT SCIENCES

Résumé : The arbuscular mycorrhizal (AM) fungi are a globally distributed group of soil organisms that play critical roles in ecosystem function. However, the ecological niches of individual AM fungal taxa are poorly understood. We collected > 300 soil samples from natural ecosystems worldwide and modelled the realised niches of AM fungal virtual taxa (VT; approximately species‐level phylogroups). We found that environmental and spatial variables jointly explained VT distribution worldwide, with temperature and pH being the most important abiotic drivers, and spatial effects generally occurring at local to regional scales. While dispersal limitation could explain some variation in VT distribution, VT relative abundance was almost exclusively driven by environmental variables. Several environmental and spatial effects on VT distribution and relative abundance were correlated with phylogeny, indicating that closely related VT exhibit similar niche optima and widths. Major clades within the Glomeraceae exhibited distinct niche optima, Acaulosporaceae generally had niche optima in low pH and low temperature conditions, and Gigasporaceae generally had niche optima in high precipitation conditions. Identification of the realised niche space occupied by individual and phylogenetic groups of soil microbial taxa provides a basis for building detailed hypotheses about how soil communities respond to gradients and manipulation in ecosystems worldwide.

Mots-clés Agrovoc : champignon du sol, mycorhize arbusculaire, facteurs abiotiques, pH de la rhizosphère, température du sol, phytoécologie, phylogénie

Mots-clés complémentaires : Niche écologique, Glomeraceae, Acaulosporaceae, Gigasporaceae

Mots-clés libres : Arbuscular mycorrhizal fungi, Ecological niche, Molecular taxa, Niche optimum, Niche width, PH, Temperature, Phylogenetic correlation

Classification Agris : F40 - Écologie végétale
P34 - Biologie du sol

Champ stratégique Cirad : CTS 1 (2019-) - Biodiversité

Agences de financement européennes : European Regional Development Fund

Auteurs et affiliations

• Davison John, University of Tartu (EST) - auteur correspondant
• Moora Mari, University of Tartu (EST) - auteur correspondant
• Semchenko Marina, University of Tartu (EST) - auteur correspondant
• Binte Adenan Sakeenah, Qatar University (QAT)
• Ahmed Talaat, Qatar University (QAT)
• Akhmetzhanova Asem A., Moscow Lomonsov State University (RUS)
• Atalalo Juha M., Qatar University (QAT)
• Al-Quraishy Saleh, King Saud University (SAU)
• Andriyanova Elena, Institute of Biological Problems of the North Far East Branch of Russian Academy of Sciences (RUS)
• Anslan Sten, University of Tartu (EST)
• Bahram Mohammad, Swedish University of Agricultural Sciences (SWE)
• Batbaatar Amgaa, University of Alberta (CAN)
• Brown Charlotte, University of Alberta (CAN)
• Bueno C. Guillermo, University of Tartu (EST)
• Cahill James, University of Alberta (CAN)
• Cantero Juan José, CONICET (ARG)
• Casper Brenda B., University of Pennsylvania (USA)
• Cherosov Mikhail, Institute of Biological Problems of the North Far East Branch of Russian Academy of Sciences (RUS)
• Chideh Saida, Université de Djibouti (DJI)
• Coelho Ana P., University of Aveiro (PRT)
• Coghill Matthew, Thompson Rivers University (CAN)
• Decocq Guillaume, Université de Picardie (FRA)
• Dudov Sergey, Moscow Lomonsov State University (RUS)
• Fabiano Ezequiel Chimbioputo, University of Namibia (NAM)
• Fedosov Vladimir E., Moscow Lomonsov State University (RUS)
• Fraser Lauchlan, Thompson Rivers University (CAN)
• Glassman Sydney I., UC (USA)
• Helm Aveliina, University of Tartu (EST)
• Henry Hugh A.L., University of Western Ontario (CAN)
• Herault Bruno, CIRAD-ES-UPR Forêts et sociétés (CIV) ORCID: 0000-0002-6950-7286
• et al.

Source : Cirad-Agritrop (https://agritrop.cirad.fr/597604/)

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