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Chapitre D'ouvrage Année : 2020

Alternative stable states, tipping points, and early warning signals of ecological transitions

J.M. Drake
  • Fonction : Auteur
S.M. O’regan
  • Fonction : Auteur
Pejman Rohani
  • Fonction : Auteur

Résumé

Ecological systems are prone to dramatic shifts between alternative stable states. In reality, these shifts are often caused by slow forces external to the system that eventually push it over a tipping point. Theory predicts that when ecological systems are brought close to a tipping point, the dynamical feedback intrinsic to the system interact with intrinsic noise and extrinsic perturbations in characteristic ways. The resulting phenomena thus serve as “early warning signals” for shifts such as population collapse. In this chapter, we review the basic (qualitative) theory of such systems. We then illustrate the main ideas with a series of models that both represent fundamental ecological ideas (e.g. density-dependence) and are amenable to mathematical analysis. These analyses provide theoretical predictions about the nature of measurable fluctuations in the vicinity of a tipping point. We conclude with a review of empirical evidence from laboratory microcosms, field manipulations, and observational studies.
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Dates et versions

hal-02996950 , version 1 (09-11-2020)

Identifiants

  • HAL Id : hal-02996950 , version 1

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J.M. Drake, S.M. O’regan, Vasilis Dakos, Sonia Kéfi, Pejman Rohani. Alternative stable states, tipping points, and early warning signals of ecological transitions. Theoretical ecology: Concepts and applications, 2020. ⟨hal-02996950⟩
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