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. 2021 Jul;231(2):763-776.
doi: 10.1111/nph.17240. Epub 2021 Mar 4.

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

John Davison  1 Mari Moora  1 Marina Semchenko  1   2 Sakeenah Binte Adenan  3 Talaat Ahmed  3 Asem A Akhmetzhanova  4 Juha M Alatalo  3 Saleh Al-Quraishy  5 Elena Andriyanova  6 Sten Anslan  1 Mohammad Bahram  7 Amgaa Batbaatar  8 Charlotte Brown  8 C Guillermo Bueno  1 James Cahill  8 Juan José Cantero  9   10 Brenda B Casper  11 Mikhail Cherosov  12 Saida Chideh  13 Ana P Coelho  14 Matthew Coghill  15 Guillaume Decocq  16 Sergey Dudov  4 Ezequiel Chimbioputo Fabiano  17 Vladimir E Fedosov  4   18 Lauchlan Fraser  15 Sydney I Glassman  19 Aveliina Helm  1 Hugh A L Henry  20 Bruno Hérault  21   22   23 Indrek Hiiesalu  1 Inga Hiiesalu  1 Wael N Hozzein  5   24 Petr Kohout  25   26 Urmas Kõljalg  1 Kadri Koorem  1 Lauri Laanisto  27 Ülo Mander  1 Ladislav Mucina  28   29 Jean-Pierre Munyampundu  30 Lena Neuenkamp  1   31 Ülo Niinemets  32 Casper Nyamukondiwa  33 Jane Oja  1 Vladimir Onipchenko  4 Meelis Pärtel  1 Cherdchai Phosri  34 Sergei Põlme  1   35 Kersti Püssa  1 Argo Ronk  11 Alessandro Saitta  36 Olivia Semboli  37 Siim-Kaarel Sepp  1 Alexey Seregin  4 Surya Sudheer  1 Clara P Peña-Venegas  38 Claudia Paz  39 Tanel Vahter  1 Martti Vasar  1 Annelies J Veraart  40 Leho Tedersoo  1 Martin Zobel  5   41 Maarja Öpik  1
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Free article

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

John Davison et al. New Phytol. 2021 Jul.
Free article

Abstract

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.

Keywords: arbuscular mycorrhizal fungi; ecological niche; molecular taxa; niche optimum; niche width; pH; phylogenetic correlation; temperature.

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References

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