In this paper, we study a three-species food chain model with intraguild predation and taxis mechanisms (prey-taxis and alarm-taxis) in an open interval \(\Omega \subset \mathbb {R}\) with smooth boundary. Based on energy estimates, we first establish the existence of global classical solutions with a uniform-in-time bound. Moreover, we build the global stability of the spatially homogeneous prey-only steady states, semi-coexistence and coexistence steady states under certain conditions on parameters by using the Lyapunov functionals and LaSalle’s invariant principle. With numerical simulations, we further demonstrate that the combination of taxis mechanisms and intraguild predation can produce stationary spatially inhomogeneous patterns, chaotic spatiotemporal patterns and spatial-periodic patterns for the parameters outside the stability regime. We also find from numerical simulations that prey-taxis could destabilize a positive equilibrium in a three-species Lotka–Volterra model with intraguild predation, which is in contrast to the well-known results that the attractive prey-taxis serves to enhance the stability of the spatially homogeneous steady state in two-species predator system or three-species food chain model without intraguild predation.
