The dimensionality and structure of species trait spaces

David Mouillot, Nicolas Loiseau, Matthias Grenié, Adam C. Algar, Michele Allegra, Marc W. Cadotte, Nicolas Casajus, Pierre Denelle, Maya Guéguen, Anthony Maire, Brian Maitner, Brian J. McGill, Matthew McLean, Nicolas Mouquet, François Munoz, Wilfried Thuiller, Sébastien Villéger, Cyrille Violle, Arnaud Auber

Résultat de recherche: Review articleexamen par les pairs

81 Citations (Scopus)

Résumé

Trait-based ecology aims to understand the processes that generate the overarching diversity of organismal traits and their influence on ecosystem functioning. Achieving this goal requires simplifying this complexity in synthetic axes defining a trait space and to cluster species based on their traits while identifying those with unique combinations of traits. However, so far, we know little about the dimensionality, the robustness to trait omission and the structure of these trait spaces. Here, we propose a unified framework and a synthesis across 30 trait datasets representing a broad variety of taxa, ecosystems and spatial scales to show that a common trade-off between trait space quality and operationality appears between three and six dimensions. The robustness to trait omission is generally low but highly variable among datasets. We also highlight invariant scaling relationships, whatever organismal complexity, between the number of clusters, the number of species in the dominant cluster and the number of unique species with total species richness. When species richness increases, the number of unique species saturates, whereas species tend to disproportionately pack in the richest cluster. Based on these results, we propose some rules of thumb to build species trait spaces and estimate subsequent functional diversity indices.

Langue d'origineEnglish
Pages (de-à)1988-2009
Nombre de pages22
JournalEcology Letters
Volume24
Numéro de publication9
DOI
Statut de publicationPublished - sept. 2021

Note bibliographique

Funding Information:
This research is supported by the Fondation pour la Recherche sur la Biodiversité (FRB) and Electricité de France (EDF) in the context of the CESAB project ‘Causes and consequences of functional rarity from local to global scales’ (FREE).

Publisher Copyright:
© 2021 John Wiley & Sons Ltd.

ASJC Scopus Subject Areas

  • Ecology, Evolution, Behavior and Systematics

PubMed: MeSH publication types

  • Journal Article
  • Review

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