Reducing the extinction risk of stochastic populations via nondemographic noise

Shay Be'Er, Michael Assaf

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We consider nondemographic 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 nondemographic 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.

Original languageAmerican English
Article number020302
JournalPhysical Review E
Issue number2
StatePublished - 26 Feb 2018

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© 2018 American Physical Society.


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