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Advancing biological invasion hypothesis testing using functional diversity indices.

David Renault1, Manon C M Hess2, Julie Braschi3

  • 1University of Rennes, CNRS, ECOBIO [(Ecosystèmes, biodiversité, évolution)] - UMR 6553, Rennes, France; Institut Universitaire de France, 1 rue Descartes, 75231 Paris Cedex 05, France.

The Science of the Total Environment
|April 10, 2022
PubMed
Summary
This summary is machine-generated.

Functional diversity indices reveal subtle impacts of invasive species on ecosystems. Studies show functional diversity changes during invasions, but more research is needed on early invasion stages and functional differences between invaders and natives.

Keywords:
Alien invasive speciesCommunity-weighted trait meanDiversity indicesFunctional traitsInvasibilityInvasiveness

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Area of Science:

  • Ecology
  • Invasion Biology

Background:

  • Traditional studies on invasive species focus on taxonomic diversity, overlooking species' functional roles.
  • Subtle ecosystem effects of biological invasions necessitate the use of functional diversity indices.

Purpose of the Study:

  • To review and synthesize the application of functional diversity indices in invasion biology.
  • To highlight research gaps concerning the functional impacts of invasive species on native communities and ecosystems.

Main Methods:

  • Review of major functional diversity indices, detailing their strengths and limitations.
  • Analysis of studies employing functional diversity indices to assess the effects of invasive species.

Main Results:

  • Functional diversity of recipient communities varies with invasion stage, stabilizing at intermediate to high invasion levels.
  • Early invasion stages and functional differences between invaders and natives remain understudied.
  • Consistent functional diversity changes indicating the end of the invasion lag phase are not yet established.

Conclusions:

  • Functional diversity indices offer valuable tools for diagnosing community structure and ecosystem functioning.
  • Recommendations include reporting invasion stage when using functional diversity metrics.
  • Improved application of these indices can enhance conservation strategies and restoration planning.