Diversity and functional traits of lichens in ultramafic areas: a literature-based worldwide analysis integrated by field data at the regional scale

  • Sergio E. Favero-Longo
  • Enrica Matteucci
  • Paolo Giordani
  • Alexander G. Paukov
  • Nishanta Rajakaruna
Special Feature Ultramafic Ecosystems: Proceedings of the 9th International Conference on Serpentine Ecology
  • 32 Downloads

Abstract

While higher plant communities found on ultramafics are known to display peculiar characteristics, the distinguishability of any peculiarity in lichen communities is still a matter of contention. Other biotic or abiotic factors, rather than substrate chemistry, may contribute to differences in species composition reported for lichens on adjacent ultramafic and non-ultramafic areas. This work examines the lichen biota of ultramafics, at global and regional scales, with reference to species-specific functional traits. An updated world list of lichens on ultramafic substrates was analyzed to verify potential relationships between diversity and functional traits of lichens in different Köppen–Geiger climate zones. Moreover, a survey of diversity and functional traits in saxicolous communities on ultramafic and non-ultramafic substrates was conducted in Valle d’Aosta (North-West Italy) to verify whether a relationship can be detected between substrate and functional traits that cannot be explained by other environmental factors related to altitude. Analyses (unweighted pair group mean average clustering, canonical correspondence analysis, similarity-difference-replacement simplex approach) of global lichen diversity on ultramafic substrates (2314 reports of 881 taxa from 43 areas) displayed a zonal species distribution in different climate zones rather than an azonal distribution driven by the shared substrate. Accordingly, variations in the frequency of functional attributes reflected reported adaptations to the climate conditions of the different geographic areas. At the regional scale, higher similarity and lower species replacement were detected at each altitude, independent from the substrate, suggesting that altitude-related climate factors prevail over putative substrate–factors in driving community assemblages. In conclusion, data do not reveal peculiarities in lichen diversity or the frequency of functional traits in ultramafic areas.

Keywords

Functional traits Lichen Köppen–Geiger climate zones Serpentine Ultramafic 

Notes

Acknowledgements

EM was the recipient of a postdoctoral fellowship (RICERCA FSE 2011–2012, funded by the European Union, Italian Ministry of Labour and Social Policies, Regione Autonoma Valle d’Aosta: agreement 10016/DPLF/28June2012). The authors are grateful to Bianca Bovero (University of Torino) for her assistance during fieldwork and to Rosanna Piervittori (University of Torino) for helpful discussions. The authors thank two reviewers for their useful and constructive comments which helped improve the quality of the manuscript. The work of AP is financially supported by RFBR (Grants 15-04-05971 and 16-04-01346).

Supplementary material

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Supplementary material 2 (PDF 126 kb)

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Copyright information

© The Ecological Society of Japan 2018

Authors and Affiliations

  1. 1.Dipartimento di Scienze della Vita e Biologia dei SistemiUniversità degli Studi di TorinoTurinItaly
  2. 2.Dipartimento di FarmaciaUniversità di GenovaGenoaItaly
  3. 3.Department of Biodiversity and Bioecology, Institute of Natural SciencesUral Federal UniversityEkaterinburgRussia
  4. 4.Biological Sciences DepartmentCalifornia Polytechnic State UniversitySan Luis ObispoUSA
  5. 5.Unit for Environmental Sciences and ManagementNorth-West UniversityPotchefstroomSouth Africa

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