Search results for "Recursion"

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Noise Induced Phenomena in Lotka-Volterra Systems

2003

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.

Forcing (recursion theory)ExtinctionStatistical Mechanics (cond-mat.stat-mech)Stochastic resonanceGeneral MathematicsLotka–Volterra equationsPopulations and Evolution (q-bio.PE)Time evolutionFOS: Physical sciencesGeneral Physics and AstronomyStatistical mechanicsNoiseControl theoryFOS: Biological sciencesSpatial ecologyQuantitative Biology::Populations and EvolutionStatistical physicsQuantitative Biology - Populations and EvolutionCondensed Matter - Statistical MechanicsMathematics
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