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Forwards and pullback behaviour of a non-autonomous Lotka-Volterra system


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Opened Access Forwards and pullback behaviour of a non-autonomous Lotka-Volterra system

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Author: Langa Rosado, José Antonio
Robinson, James C.
Suárez Fernández, Antonio
Department: Universidad de Sevilla. Departamento de Ecuaciones Diferenciales y Análisis Numérico
Date: 2003-07
Published in: Nonlinearity, 16(4), 1277-1293
Document type: Article
Abstract: Lotka-Volterra systems have been extensively studied by many authors, both in the autonomous and non-autonomous cases. In previous papers the time asymptotic behaviour as t → ∞ has been considered. In this paper we also consider the “pullback” asymptotic behaviour which roughly corresponds to observing a system “now” that has already been evolving for a long time. For a competitive system that is asymptotically autonomous both as t → −∞ and as t → +∞ we show that these two notions of asymptotic behaviour can be very different but are both important for a full understanding of the dynamics. In particular there are parameter ranges for which, although one species dies out as t → ∞, there is a distinguished time-dependent coexistent state that is attracting in the pullback sense.
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DOI: 10.1088/0951-7715/16/4/305

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