On competition-mediated coexistence

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8 Scopus citations


Two competing species, denoted B and C, currently inhabit a common habitat patch. Left alone, B can be expected to exclude C from the patch over time. An exotic species A is introduced into the patch. A competes with both B and C. Absent B, A can also be expected to exclude C from the patch over time, whereas absent C, A and B can be expected to coexist. Whether or not the introduction of A into the habitat patch makes for the long-term coexistence of all three species is examined in this article via reaction-diffusion models. It is shown that such an outcome depends on the precise qualitative nature of the pairwise competitive interactions. In particular, long-term coexistence of all three species cannot be expected in the case of Lotka-Volterra models but can be expected for suitable modifications of such models.

Original languageEnglish (US)
Pages (from-to)1311-1327
Number of pages17
JournalSIAM Journal on Applied Mathematics
Issue number5
StatePublished - Oct 1997


  • Competition mediated coexistence
  • Permanence
  • Persistence of ecological communities
  • Reaction-diffusion models
  • Theoretical ecology

ASJC Scopus subject areas

  • Applied Mathematics


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