CONTACT AND VOTER PROCESSES ON THE INFINITE PERCOLATION CLUSTER AS MODELS OF HOST-SYMBIONT INTERACTIONS

• 成果类型: Article
• 署名作者: Bertacchi, D.; Lanchier, N.; Zucca, F.
• 署名单位: University of Milano-Bicocca; Arizona State University; Arizona State University-Tempe; Polytechnic University of Milan
• 刊物名称: ANNALS OF APPLIED PROBABILITY
• ISSN/ISSBN: 1050-5164
• DOI: 10.1214/10-AAP734
• 发表日期: 2011
• 页码: 1215-1252
• 关键词: stochastic spatial models; random-walks; pathogen

摘要

We introduce spatially explicit stochastic processes to model multispecies host-symbiont interactions. The host environment is static, modeled by the infinite percolation cluster of site percolation. Symbionts evolve on the infinite cluster through contact or voter type interactions, where each host may be infected by a colony of symbionts. In the presence of a single symbiont species, the condition for invasion as a function of the density of the habitat of hosts and the maximal size of the colonies is investigated in details. In the presence of multiple symbiont species, it is proved that the community of symbionts clusters in two dimensions whereas symbiont species may coexist in higher dimensions.