The positive role of parasites in the origins of life

—One problem in the origins of life is how parasitic side-reactions can be mitigated. It is known that spatial selforganisation can help with this, making autocatalytic chemical systems more robust to invasion by parasitic species. In previous work we have shown that in such scenarios parasitic reactions can actually be beneficial. Here we demonstrate for the first time a system in which the presence of a parasitic autocatalytic cycle is not only beneficial but actually necessary for the persistence of its host. This occurs due to the effect the parasite has on the spatial organisation of the system; the host-parasite system is more stable than the host alone, despite the fact that the parasite’s direct effect on its host is purely negative. We briefly discuss the implications for the origins of life. Keywords—origins of life, reaction-diffusion, parasites, spatial self-organisation

• Type: Journal
• Year: 2013
• Where: ALIFE
• Authors: Nathaniel Virgo, Tom Froese, Takashi Ikegami
• Keywords: ALIFE 2013, Modeling And Simulation