Conjugate coupling in ecosystems: Cross-predation stabilizes food webs

We study the dynamics of two predator-prey systems that are coupled via cross-predation, in which each predator consumes also the other prey. This setup constitutes a model system in which conjugate coupling emerges naturally and denotes the transition from two separate food chains to a food web. We show that cross-predation of a certain strength leads to amplitude death stabilizing the food web in a new equilibrium. (C) 2014 Elsevier Ltd. All rights reserved.