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• W2955305912 endingPage "108222" @default.
• W2955305912 startingPage "108222" @default.
• W2955305912 abstract "Recent work has shown that higher-order terms in population dynamics models can increase the stability, promote the diversity, and better explain the dynamics of ecological systems. While it is known that these perceived benefits come from an increasing number of alternative solutions given by the nature of multivariate polynomials, this mathematical advantage has not been formally quantified. Here, we develop a general method to quantify the mathematical advantage of adding higher-order interactions in ecological models based on the number of free-equilibrium points that can emerge in a system (i.e., equilibria that can be feasible or unfeasible as a function of model parameters). We apply this method to calculate the number of free-equilibrium points in Lotka–Volterra dynamics. While it is known that Lotka–Volterra models without higher-order interactions only have one free-equilibrium point regardless of the number of parameters, we find that by adding higher-order terms this number increases exponentially with the dimension of the system. Hence, the number of free-equilibrium points can be used to compare more fairly between ecological models. Our results suggest that while adding higher-order interactions in ecological models may be good for prediction purposes, they cannot provide additional explanatory power of ecological dynamics if model parameters are not ecologically restricted." @default.
• W2955305912 created "2019-07-12" @default.
• W2955305912 creator A5033643258 @default.
• W2955305912 creator A5040700864 @default.
• W2955305912 date "2019-09-01" @default.
• W2955305912 modified "2023-09-27" @default.
• W2955305912 title "Is the addition of higher-order interactions in ecological models increasing the understanding of ecological dynamics?" @default.
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• W2955305912 doi "https://doi.org/10.1016/j.mbs.2019.108222" @default.
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