Noise promotes species diversity in nature.
Species diversity in nature is accomplished by coexistence. In a spatial environment, inferior but rapidly moving species can coexist with superior but relatively stationary species. Recent work showed that chaotic dynamics can provide the spatiotemporal variation in the fitness required for coexistence, via the dynamical mechanism of synchronization and intermittency. Utilizing a realistic model that consists of two interacting species in a two-patch environment, we discovered a stochastic-resonance phenomenon where noise can significantly enhance the coexistence and thereby promote species diversity.
Lai
Ying-Cheng
YC
Department of Electrical Engineering, Arizona State University, Tempe, Arizona 85287, USA.
Liu
Yi-Rong
YR
D000818:Animals; D005075:Biological Evolution; D003163:Competitive Behavior; D003198:Computer Simulation; D017753:Ecosystem; D014644:Genetic Variation / Q000235:genetics*; D006801:Humans; D008957:Models, Genetic; D015233:Models, Statistical; D017711:Nonlinear Dynamics; D011157:Population Dynamics; D013045:Species Specificity; D013269:Stochastic Processes