6533b861fe1ef96bd12c509f

RESEARCH PRODUCT

Analysis of ecological shifts in the two‐age structured population model with Allee effect and environmental noise

Bernardo SpagnoloBernardo SpagnoloIrina BashkirtsevaDavide Valenti

subject

age-structured modelSettore FIS/02 - Fisica Teorica Modelli E Metodi MatematiciAge structureGeneral MathematicsGeneral Engineeringphase transitionssymbols.namesakeNoiseStatisticspopulation dynamicssymbolsEnvironmental noiseAllee effectMathematics

description

We study noise-induced transformations in the two-age structured population model with the Allee effect and environmental fluctuations. In this bistable model, ecological shifts are associated mathematically with random transitions between basins of coexisting attractors. The following phenomena are revealed and studied: (i) noise-induced extinction, (ii) stochastic regeneration, and (iii) excitement of random mixed-mode oscillations. Constructive abilities of the analytical method of confidence domains are demonstrated in the parametric study of these phenomena.

yearjournalcountryeditionlanguage
2020-07-28Mathematical Methods in the Applied Sciences
https://doi.org/10.1002/mma.6778