On-off intermittency and irruptions in host-parasitoid dynamics

Gabriele Vissio; Antonello Provenzale

doi:10.1016/j.jtbi.2022.111174

On-off intermittency and irruptions in host-parasitoid dynamics

J Theor Biol. 2022 Aug 7:546:111174. doi: 10.1016/j.jtbi.2022.111174. Epub 2022 May 25.

Authors

Gabriele Vissio¹, Antonello Provenzale²

Affiliations

¹ Institute of Geosciences and Earth Resources (IGG) - National Research Council (CNR), Via Valperga Caluso 35, 10125 Turin, Italy. Electronic address: gabriele.vissio@igg.cnr.it.
² Institute of Geosciences and Earth Resources (IGG) - National Research Council (CNR), Via Giuseppe Moruzzi 1, 56124 Pisa, Italy.

PMID: 35643338
DOI: 10.1016/j.jtbi.2022.111174

Abstract

Environmental stochasticity affects population dynamics in a variety of ways, including the possibility of drastic modifications in the stability properties of the ecosystem. In this work, we investigate a case of coupled host-parasitoid dynamics adopting Beddington's conceptual two-dimensional map. We stochastically perturb some of the parameters controlling either the host dynamics or the host-parasitoid interaction, observing a dramatic change in the system dynamics with the emergence of on-off intermittency, a behavior characterized by the irregular alternation between quiescent phases and sudden population bursts. This phenomenon is herein offered as a qualitative, environmental-based description of population outbreaks.

Keywords: Environmental stochasticity; On-off intermittency; Population dynamics; Population outbreaks.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Ecosystem*
Host-Parasite Interactions*
Models, Biological
Population Dynamics