Affiliation:
1. Istituto Nazionale di Fisica della Materia, Unità di Palermo and Dipartimento di Fisica e Tecnologie Relative, University of Palermo Viale delle Scienze, I-90128 Palermo, Italy
Abstract
We study the time evolution of two ecosystems in the presence of external noise and climatic periodical forcing by a generalized Lotka-Volterra (LV) model. In the first ecosystem, composed by two competing species, we find noise induced phenomena such as: (i) quasi deterministic oscillations, (ii) stochastic resonance, (iii) noise delayed extinction and (iv) spatial patterns. In the second ecosystem, composed by three interacting species (one predator and two preys), using a discrete model of the LV equations we find that the time evolution of the spatial patterns is strongly dependent on the initial conditions of the three species.
Publisher
World Scientific Pub Co Pte Lt
Subject
General Physics and Astronomy,General Mathematics
Cited by
77 articles.
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