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Conservation unit allows assessing vulnerability and setting conservation priorities for a Mediterranean endemic plant within the context of extreme urbanization

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Abstract

Current biodiversity patterns are a temporary state in a continuum of ecological and evolutionary changes. Conservation policies must incorporate this dynamic to ensure the long-term conservation of biodiversity which is particularly challenging in a context of extreme urbanization. An original approach, rarely used for plant conservation, is to define conservation units to set conservation priorities within species by combining ecological and evolutionary divergences. In the Maritime Alps (southern France), the ecological and evolutionary divergences between the populations of Acis nicaeensis has allowed us the determination of conservation units of this endemic plant threatened by severe urbanization and land-use changes. Phylogeographical data (cpDNA haplotype) were considered as a proxy for evolutionary legacy, and ecological data (multivariate analysis of habitat) were used as a proxy for ecological distinctiveness. Our goal was to explore the potential of this approach to assess vulnerability and set conservation priorities for narrow endemic species in the context of conflict between biodiversity and human activities. The results highlight five different conservation units within A. nicaeensis distribution. Genetic and ecological divergences are present at fine-scale. This pattern is highly endangered by urbanisation. This study highlights the vulnerability of conservation units near the coast whose originality and restricted distribution call for rapid conservation management to avoid the loss of species evolutionary and ecological distinctiveness.

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Acknowledgements

This research was part of the Ph.D. thesis of Marine Pouget supported by the Région Provence–Alpes–Côte d’Azur (PACA) and performed at the IMBE/Aix-Marseille University. Molecular screening was realized by the molecular biology service of IMBE and we thanks Nathalie Duong for her help. For their great contribution in the record of Acis nicaeensis populations, we would like to thanks Julien Baret (BIODIV) and Jérôme Volant (ECOMED). Field and molecular works were partly funded by the Prince’s Government of the Principality of Monaco (Department of the Environment), the Prince Albert II of Monaco Foundation (project MONACOBIODIV) and the Provence-Alpes-Côte d’Azur regional environmental management centre (DREAL-PACA).

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  1. Institut Méditerranéen de Biodiversité et d’Ecologie marine et continentale (IMBE) Aix Marseille Université, CNRS, IRD, Univ. Avignon, Technopôle Arbois-Méditerranée Bât. Villemin – BP 80, F-13545, Aix-en-Provence cedex 04, France

    Marine Pouget, Alex Baumel & Frédéric Médail

  2. Centre for Middle Eastern Plants, Royal Botanic Garden Edinburgh, 20a Inverleith Row, Edinburgh, EH3 5LR, United Kingdom

    Marine Pouget

  3. Conservatoire botanique national méditerranéen de Porquerolles (CBNMed), 34 avenue Gambetta, 83400, Hyères, France

    Katia Diadema

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Correspondence to Frédéric Médail.

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Communicated by Daniel Sanchez Mata.

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Pouget, M., Baumel, A., Diadema, K. et al. Conservation unit allows assessing vulnerability and setting conservation priorities for a Mediterranean endemic plant within the context of extreme urbanization. Biodivers Conserv 26, 293–307 (2017). https://doi.org/10.1007/s10531-016-1242-3

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