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Movement Retraining using Real-time Feedback of Performance
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Frequency-dependent feedback constrains plant community coexistence.

Maarten B Eppinga1, Mara Baudena2, Daniel J Johnson3

  • 1Copernicus Institute of Sustainable Development, Environmental Sciences, Faculty of Geosciences, Utrecht University, Utrecht, the Netherlands. M.B.Eppinga@uu.nl.

Nature Ecology & Evolution
|August 1, 2018
PubMed
Summary
This summary is machine-generated.

Negative frequency-dependent feedbacks are crucial for species coexistence in ecological communities. This study introduces a metric to quantify feedback strength, linking theory to empirical data and predicting increased diversity with stronger negative feedback.

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Area of Science:

  • Ecology
  • Community Ecology
  • Theoretical Ecology

Background:

  • Ecological theory posits that negative frequency-dependent feedbacks are essential for maintaining species coexistence and diversity within communities.
  • Empirical evidence for negative frequency dependence in plant communities is growing, but theoretical frameworks have been limited to small numbers of species.
  • Bridging the gap between theory and empirical data requires a framework applicable to complex, multi-species communities.

Purpose of the Study:

  • To demonstrate how frequency-dependent feedback constrains community coexistence irrespective of species number or fitness differences.
  • To introduce a quantitative metric, the community interaction coefficient (IC), for characterizing community-level feedback.
  • To test the prediction that species diversity increases with the strength of negative feedback.

Main Methods:

  • Developed a theoretical framework to analyze frequency-dependent feedback in ecological communities of any size.
  • Introduced the community interaction coefficient (IC) as a measure of overall community feedback.
  • Utilized data from over 200,000 deciduous forest plots in the eastern United States and simulations to test theoretical predictions.

Main Results:

  • Negative feedback (IC < 0) is a necessary condition for overall community persistence, even enabling species persistence through cyclic succession.
  • The number of coexisting species is predicted to increase with the average strength of negative feedback.
  • Simulations reproduced observed tree species diversity patterns in relation to community feedback.

Conclusions:

  • The community interaction coefficient (IC) provides a unified metric to assess the role of frequency-dependent feedback in community stability and diversity.
  • The study establishes a quantitative link between theoretical predictions and empirical observations of species diversity.
  • This framework allows for testing the causality of feedback-diversity correlations in ecological systems.