Cuadro de texto:  In the absence of flow, excitable blooms are transient phenomena: at each spatial point, excitation occurs and dissapears 

 Chaotic scattering is a transient phenomenon: almost all particle trajectories leave the system soon or later

 TOGETHER: Permanent pattern of excitation: sustained productivity with species permanently at a much higher concentration than the stable equilibrium value. 
Cuadro de texto: WHY ?

HOW GENERAL ?

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