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Mycorrhiza

, Volume 29, Issue 1, pp 1–11 | Cite as

Conceptual differences lead to divergent trait estimates in empirical and taxonomic approaches to plant mycorrhizal trait assignment

  • C. Guillermo BuenoEmail author
  • Maret Gerz
  • Martin Zobel
  • Mari Moora
Original Article

Abstract

Empirical and taxonomic approaches are the two main methods used to assign plant mycorrhizal traits to species lists. While the empirical approach uses only available empirical information, the taxonomic approach extrapolates certain core information about plant mycorrhizal types and statuses to related species. Despite recent claims that the taxonomic approach is now almost definitive, with little benefit to be gained from further empirical data collection, it has not been thoroughly compared with the empirical approach. Using the most complete available plant mycorrhizal trait information for Europe and both assignment approaches, we calculate the proportion of species for each trait, and model environmental drivers of trait distribution across the continent. We found large degrees of mismatch between approaches, with consequences for biogeographical interpretation, among facultatively mycorrhizal (FM; 91% of species mismatched), non-mycorrhizal (NM; 45%), and to a lesser extent arbuscular mycorrhizal (AM; 16%) plant species. This can partly be attributed to the taxonomic precision of the taxonomic approach and the use of different AM, NM, and FM concepts. Our results showed that the extrapolations of the taxonomic approach do not consistently match with empirical information and indicate that more empirical data are needed, in particular for FM, NM, and AM plant species. Clarifying certain concepts underlying mycorrhizal traits and empirically describing NM, AM, and FM species within plant families can greatly improve our understanding of the biogeography of mycorrhizal symbiosis.

Keywords

Arbuscular mycorrhiza (AM) Ectomycorrhiza (ECM) Ericoid mycorrhiza (ERM) Non-mycorrhizal plant species (NM) Obligately mycorrhizal (OM) Facultatively mycorrhizal (FM) 

Notes

Acknowledgements

This research was funded by grants from the Estonian Research Council (IUT 20-28) and the European Regional Development Fund (Centre of Excellence EcolChange). We thank Prof. Mark Brundrett and the editor (Prof. David Janos) for valuable suggestions. We are grateful to John Davison for valuable comments on the manuscript. C.G.B., M.G., M.Z., and M.M. planned and designed the research. C.G.B. and M.G. analyzed data and wrote the first draft; all authors contributed to the final version.

Supplementary material

572_2018_869_MOESM1_ESM.xlsx (149 kb)
ESM 1 (XLSX 149 kb)
572_2018_869_MOESM2_ESM.docx (2.8 mb)
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572_2018_869_MOESM3_ESM.docx (571 kb)
ESM 3 (DOCX 570 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Botany, Institute of Ecology and Earth SciencesUniversity of TartuTartuEstonia

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