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.
- Competition mediated coexistence
- Persistence of ecological communities
- Reaction-diffusion models
- Theoretical ecology
ASJC Scopus subject areas
- Applied Mathematics