Multi-model approach to population dynamics

The study of interspecies interactions in population dynamics is a complex task that requires consideration of di erent factors and their interrelationships. Due to the fact that each modeling approach has its advantages and disadvantages, we assume that the study of dynamical systems using a multi-model approach can give a better understanding of the phenomenon and allow us to choose the most adequate model for a particular problem. To implement the models in this work we use Julia language libraries such as OrdinaryDi Eq.jl, StochasticDi Eq.jl, Surrogates.jl, and additionally Plots.jl and BenchmarkTools.jl to visualize and evaluate the results respectively. The paper examined the interactions of three trophic levels (three-dimensional predator-prey system) and used the following models: analytical (stochastic and deterministic), cellular automaton and surrogate. As a result, key di erences between modeling approaches were identi ed that a ect the representation of the phenomenon under study. This allows an informed choice of the most appropriate method to be made depending on the speci c aims and objectives of the study. The proposed multi-model approach can be used to study other ecological systems.