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Ancient refugia and present-day habitat suitability of native laurophylls in Italy
Free Univ Bozen Bolzano, Fac Sci & Technol, Bozen Bolzano, Italy.
Masaryk Univ, Dept Bot, Brno, Czech Republic.
Free Univ Bozen Bolzano, Fac Sci & Technol, Bozen Bolzano, Italy.ORCID iD: 0000-0002-9426-1441
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution. Sapienza Univ Roma, Dept Environm Biol, Rome, Italy.
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2019 (English)In: Journal of Vegetation Science, ISSN 1100-9233, E-ISSN 1654-1103, Vol. 30, no 3, p. 564-574Article in journal (Refereed) Published
Abstract [en]

Questions European native laurophyllous species are interesting for their biogeography and evolutionary history, as well as for their responses to global changes. We identified Italian native laurophylls on the basis of morphology, biogeographical history and ecological niche to study whether these species are in equilibrium with the present-day climate. Furthermore, we localized Quaternary refugia and areas of potential spread of native laurophylls using distribution patterns of realized and potential aggregations of native laurophylls, respectively. Location Italy. Methods We extracted data for 17 087 forest plots from a phytosociological database. Detrended Correspondence Analysis of these plots with overlay of climatic and environmental variables was performed to identify native laurophylls, i.e., evergreen broad-leaved species of late Tertiary radiation, occupying a warm and humid niche. Potential ranges of laurophylls were calculated using Beals' index of sociological favourability. The realized/potential range-size ratio was calculated for each single laurophyll to understand whether it is in equilibrium with the present-day climate. Distribution patterns of realized and potential aggregations of laurophylls were mapped. Results Ordination analysis provided a selection of 11 species as Italian native laurophylls. Most of them occupied less than half of their estimated potential range. Realized aggregations richest in native laurophylls were localized in the central Apennines. However, the Italian forests showed high potential for native laurophylls with the richest potential aggregations in the whole Apennines and in the southern Alps. Conclusions Most of the Italian native laurophylls showed non-equilibrium with the current climate, suggesting that late-Quaternary events could better explain their present-day distribution than on-going climate change. Furthermore, their refugia in central Italy suggest the persistence in sites with temperate climate during Quaternary environmental changes. The high suitability of Italian forests for laurophylls, along with global changes, suggests possible future spreading of these species.

Place, publisher, year, edition, pages
WILEY , 2019. Vol. 30, no 3, p. 564-574
Keywords [en]
Beal's index, evergreen broad-leaved species, laurophyllisation, laurophyllous, species aggregations, species potential distribution, vegetation databases
National Category
Ecology
Identifiers
URN: urn:nbn:se:uu:diva-387968DOI: 10.1111/jvs.12743ISI: 000469999900015OAI: oai:DiVA.org:uu-387968DiVA, id: diva2:1331825
Available from: 2019-06-27 Created: 2019-06-27 Last updated: 2019-06-27Bibliographically approved

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Spada, Francesco

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