Effects on growth and competition induced by periodic fluctuations in environment

Effets sur la croissance et la compétition induits par des fluctuations périodiques de l'environnement

Tewfik Sari (1)

1 UMR ITAP - Information – Technologies – Analyse Environnementale – Procédés Agricoles

Many ecological systems experience periodic variability. Theoretical investigation of population and community dynamics in periodic environments can be studied using Floquet theory and Averaging theory. Here, I describe these tools on some typical examples including growth of population structured in stages and Lotka-Volterra competition models. These examples show that the fluctuations between two environments that are both bad for one species (the population goes to extinction for this environment) can lead to the growth of this species.

Domaines: Sciences de l'environnement

Tewfik Sari. Effects on growth and competition induced by periodic fluctuations in environment. Workshop Persistence of population models in temporally fluctuating environments, Feb 2015, Lausanne, Switzerland. pp.29. ⟨hal-02602057⟩