Reducing the extinction risk of stochastic populations via non-demographic noise
arXiv:1710.01496 · doi:10.1103/PhysRevE.97.020302
Abstract
We consider non-demographic noise in the form of uncertainty in the reaction step size, and reveal a dramatic effect this noise may have on the stability of self-regulating populations. Employing the reaction scheme mA->kA, but allowing, e.g., the product number k to be a-priori unknown and sampled from a given distribution, we show that such non-demographic noise can greatly reduce the population's extinction risk compared to the fixed k case. Our analysis is tested against numerical simulations, and by using empirical data of different species, we argue that certain distributions may be more evolutionary beneficial than others.
arXiv comment9 pages, 8 figures. Accepted for publication as a Rapid Communication in Phys. Rev. E
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