We investigate a model where strong noise in a sub-population creates a metastable state in an otherwise unstable two-population system. The induced metastable state is vortex-like, and its persistence time grows exponentially with the noise strength. A variety of distinct scaling relations are observed depending on the relative strength of the sub-population noises.
@article{arxiv.1105.0460,
title = {Noise induced stabilization in population dynamics},
author = {Matthew Parker and Alex Kamenev and Baruch Meerson},
journal= {arXiv preprint arXiv:1105.0460},
year = {2013}
}