The effects of collective motion on a rapid evolution system

Hsiang-Yun Tseng^1,2*, Hong-Yan Shih²

¹Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
²Institute of Physics, Academia Sinica, Taipei, Taiwan

* Presenter:Hsiang-Yun Tseng, email:claire29384756@gmail.com

Living systems exhibit various collective behavior through their social and ecological interactions. When the time scale of evolution is comparable to the time scale of ecological interactions, interesting phenomena such as unusual population dynamics can emerge from rapid evolution. To study how ecological dynamics is influenced by collective behavior of social motion, we investigate the spatiotemporal dynamics in an ecosystem under rapid evolution. By numerical simulations of a spatially-extended predator-prey model with flocking prey, we observe that pattern separation in population can arise from interspecies competition besides flocking mechanism, reminiscent of the characteristic phase relationshiop in population dynamics under rapid evolution. The general types of collective motion and their relationship with the stability and diversity of the ecosystem will be explored.

Keywords: spatiotemporal dynamics , collective motion, predator-prey system, pattern formation, rapid evolution