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Functional differences stabilize beetle communities by weakening interspecific temporal synchrony.

Roel van Klink1,2,3, Jan Lepš4,5, Rikjan Vermeulen3

  • 1Institute of Botany, Czech Academy of Sciences, Dukelská 135, Třeboň, 37982, Czech Republic.

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Summary
This summary is machine-generated.

Community synchrony, crucial for ecosystem stability, is driven by functional diversity, not species richness or disturbance. Greater functional diversity decreases population synchrony, enhancing community stability in heathlands.

Keywords:
compensatory dynamicsdisturbancediversity-stability relationfunctional dissimilarityground beetlesspecies richnessstabilitysynchrony

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Area of Science:

  • Ecology
  • Community Ecology
  • Ecosystem Stability

Background:

  • Temporal stability of ecological communities is vital for ecosystem functioning.
  • Biodiversity's stabilizing effect is modulated by population synchrony among species.
  • Drivers of community synchrony remain largely unclear.

Purpose of the Study:

  • To assess the drivers of community stability and synchrony in Dutch heathlands.
  • To investigate the relationship between community synchrony, disturbance, species richness, and functional diversity (FD).

Main Methods:

  • Utilized a large dataset of ground beetle trappings (~370,000 individuals in 19 plots over 9-36 years).
  • Analyzed community synchrony in relation to disturbance (fire, topsoil removal), species richness, and functional diversity.

Main Results:

  • Disturbance had no significant effect on community stability or synchrony.
  • Community synchrony was predominantly positive, indicating independent or positively correlated species fluctuations.
  • Synchrony decreased with increasing functional diversity (FD), but not with species richness.
  • Species pairs with greater trait dissimilarity exhibited less synchronous population fluctuations.

Conclusions:

  • Functional diversity, not species richness or disturbance, is a key driver of community synchrony and stability.
  • Increased functional diversity stabilizes community abundance by reducing population synchrony.
  • The stabilizing effect of FD likely stems from varied species responses to environmental fluctuations in low-competition settings.