In this paper, a nonlinear non-autonomous model in a rocky intertidal community is studied. The model is composed of two species in a rocky intertidal community, which describe a patch occupancy with global dispersal of propagules and occupy each other by individual organisms. Firstly, we study the uniform persistence of the model via differential inequality techniques. Furthermore, a sharp threshold of global asymptotic stability and the existence of a unique almost periodic solution are derived. To prove the main results, we construct an appropriate Lyapunov function whose conditions are easily verified. The assumptions of the model are reasonable and the results complement previously known ones. An example with specific values of parameters is included for demonstration of theoretical outcomes.
