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Intraspecific higher order interactions enhance ecological community stability.

Akihiko Mougi1

  • 1Institute of Agricultural and Life Sciences, Academic Assembly, Shimane University, 1060 Nishikawatsu-Cho, Matsue, 690-8504, Japan. amougi@gmail.com.

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|August 17, 2025
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Summary
This summary is machine-generated.

Intraspecific higher-order interactions, where one species affects another species' own interactions, can improve ecosystem stability. Mixed positive and negative effects on competition are key for stability in complex ecosystems.

Keywords:
Complexity–stabilityHigher-order interactionIntraspecific interactionMathematical modelNiche

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Area of Science:

  • Ecology
  • Theoretical Ecology
  • Mathematical Biology

Background:

  • Ecosystem stability is shaped by interspecific interactions.
  • Third-party species' effects on interspecific interactions are well-studied.
  • The impact of intraspecific higher-order interactions on ecosystem stability remains underexplored.

Purpose of the Study:

  • To investigate the influence of intraspecific higher-order interactions on ecosystem stability.
  • To develop a mathematical model for analyzing these effects.
  • To understand how these interactions affect competition within species.

Main Methods:

  • Development of a mathematical model.
  • Analysis of how intraspecific higher-order interactions affect ecosystem stability.
  • Examination of the role of mixed positive and negative effects on intraspecific competition.

Main Results:

  • Intraspecific higher-order interactions can enhance ecosystem stability when they increase intraspecific competition.
  • This stabilizing effect is more pronounced in large, complex ecosystems.
  • A mixture of positive and negative effects on intraspecific competition is crucial; uniform effects do not yield the same stability benefits.

Conclusions:

  • Both positive and negative effects on intraspecific competition are vital for improving stability in complex ecosystems.
  • Intraspecific higher-order interactions play a significant role in ecosystem stability.
  • Further research is needed to fully elucidate the mechanisms of higher-order interactions in complex ecological systems.