Gradual regime shifts in fairy circles

Yuval R. Zelnik, Ehud Meron, Golan Bel

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

Large responses of ecosystems to small changes in the conditions-regime shifts-are of great interest and importance. In spatially extended ecosystems, these shifts may be local or global. Using empirical data and mathematical modeling, we investigated the dynamics of the Namibian fairy circle ecosystem as a case study of regime shifts in a pattern-forming ecosystem. Our results provide new support, based on the dynamics of the ecosystem, for the view of fairy circles as a selforganization phenomenon driven by water-vegetation interactions. The study further suggests that fairy circle birth and death processes correspond to spatially confined transitions between alternative stable states. Cascades of such transitions, possible in various patternforming systems, result in gradual rather than abrupt regime shifts.

Original languageEnglish
Pages (from-to)12327-12331
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume112
Issue number40
DOIs
StatePublished - 6 Oct 2015

Keywords

  • Fairy circles|regime shifts|pattern formation|hybrid states
  • Vegetation self-organization

ASJC Scopus subject areas

  • General

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