Prioritizing phylogenetic diversity captures functional diversity unreliably

Abstract : In the face of the biodiversity crisis, it is argued that we should prioritize species in order to capture high functional diversity (FD). Because species traits often reflect shared evolutionary history, many researchers have assumed that maximizing phylogenetic diversity (PD) should indirectly capture FD, a hypothesis that we name the ``phylogenetic gambit''. Here, we empirically test this gambit using data on ecologically relevant traits from >15,000 vertebrate species. Specifically, we estimate a measure of surrogacy of PD for FD. We find that maximizing PD results in an average gain of 18% of FD relative to random choice. However, this average gain obscures the fact that in over one-third of the comparisons, maximum PD sets contain less FD than randomly chosen sets of species. These results suggest that, while maximizing PD protection can help to protect FD, it represents a risky conservation strategy.
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https://hal.umontpellier.fr/hal-02002355
Contributeur : Isabelle Vidal Ayouba <>
Soumis le : jeudi 31 janvier 2019 - 16:05:02
Dernière modification le : lundi 18 novembre 2019 - 15:40:43

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  • HAL Id : hal-02002355, version 1

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Florent Mazel, Matthew W. Pennell, Marc W. Cadotte, Sandra Diaz, Giulio Valentino Dalla Riva, et al.. Prioritizing phylogenetic diversity captures functional diversity unreliably. Nature Communications, Nature Publishing Group, 2018, 9. ⟨hal-02002355⟩

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