Wave pinning in competition-diffusion models in variable environments

Autor(en): Koehnke, M. C.
Malchow, H. 
Stichwörter: Allee effect; Biology; COEXISTENCE; CONSEQUENCES; DEPENDENCE; DYNAMICS; Environmental noise; INVASIONAL INTERFERENCE; Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology; POPULATION; PROPAGATION; Propagation failure; Reaction-diffusion models; SPATIAL SEGREGATION; SPREAD; TRAVELING-WAVES
Erscheinungsdatum: 2019
Herausgeber: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Journal: JOURNAL OF THEORETICAL BIOLOGY
Volumen: 461
Startseite: 204
Seitenende: 214
Zusammenfassung: 
Numerical results on conditions for the emergence of propagation failure of diffusive fronts in two-species competition models for populations with either logistic growth or strong Allee effect are presented. Particularly, the stability against environmental perturbations is investigated. Two different density dependencies of the noise intensities are considered. They mimic a differential functional response of the competitors to the variable environment. Assuming classical linearly density-dependent noise intensities, stochastic wave pinning can occur. This is an ecologically important finding regarding biological invasion as it means that the invasion speed can be reduced by environmental perturbations even yielding a reversal of the invasion wave. However, this depends on the form of the functional per-capita noise response. (C) 2018 Elsevier Ltd. All rights reserved.
ISSN: 00225193
DOI: 10.1016/j.jtbi.2018.10.048

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