Stuart J. Davies https://orcid.org/0000-0002-8596-7522
Mohizah Mohamad https://orcid.org/0000-0003-1645-2469
Akira Itoh https://orcid.org/0000-0002-2493-1681
Kabir G. Peay https://orcid.org/0000-0002-7998-7412
Sabrina E. Russo https://orcid.org/0000-0002-6788-2410
Monique Weemstra https://orcid.org/0000-0002-6994-2501
Date of this Version
Published in New Phytologist 228 (2020), pp 253–268.
• Arbuscular mycorrhizal fungi (AMF) and ectomycorrhizal fungi (EMF) produce contrasting plant–soil feedbacks, but how these feedbacks are constrained by lithology is poorly understood.
• We investigated the hypothesis that lithological drivers of soil fertility filter plant resource economic strategies in ways that influence the relative fitness of trees with AMF or EMF symbioses in a Bornean rain forest containing species with both mycorrhizal strategies.
• Using forest inventory data on 1245 tree species, we found that although AMF-hosting trees had greater relative dominance on all soil types, with declining lithological soil fertility EMF-hosting trees became more dominant. Data on 13 leaf traits and wood density for a total of 150 species showed that variation was almost always associated with soil type, whereas for six leaf traits (structural properties; carbon, nitrogen, phosphorus ratios, nitrogen isotopes), variation was also associated with mycorrhizal strategy. EMF-hosting species had slower leaf economics than AMF-hosts, demonstrating the central role of mycorrhizal symbiosis in plant resource economies.
• At the global scale, climate has been shown to shape forest mycorrhizal composition, but here we show that in communities it depends on soil lithology, suggesting scale-dependent abiotic factors influence feedbacks underlying the relative fitness of different mycorrhizal strategies.
Includes supplementary materials.