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Related Experiment Videos

Size, foraging, and food web structure.

Owen L Petchey1, Andrew P Beckerman, Jens O Riede

  • 1Department of Animal and Plant Sciences, Alfred Denny Building, University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom. o.petchey@shef.ac.uk

Proceedings of the National Academy of Sciences of the United States of America
|March 14, 2008
PubMed
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Optimal foraging theory predicts ecological community structure by modeling species interactions. This research uses an optimal foraging model to successfully predict 65% of real food web links, supporting behavior-driven food web structure.

Area of Science:

  • Ecology
  • Theoretical Ecology
  • Food Web Dynamics

Background:

  • Understanding ecological community structure is crucial for addressing extinctions, environmental change, and ecosystem functioning.
  • Optimal foraging theory provides a framework to predict species interactions and community structure.

Purpose of the Study:

  • To predict the structure of real food webs using an optimal foraging model and allometries.
  • To provide a mechanistic basis for food web structure prediction.

Main Methods:

  • Utilized an optimal foraging model incorporating allometries of foraging variables.
  • Analyzed the qualitative and quantitative structure of predicted food webs against real-world data.

Main Results:

Related Experiment Videos

  • The model successfully predicted up to 65% of links in real food webs.
  • Predacious and herbivorous interactions were better predicted than pathogenic or parasitic ones.
  • Model successes and failures were analyzed due to its deterministic nature.

    • Conclusions:

    • Individual behavior, driven by natural selection, shapes diets and consequently, food web structure.
    • Incorporating additional traits beyond body size and diet may be necessary for accurate food web modeling.