2026/07/01 by Qian Qin, Lei Li, Hua Nie
paper · doi:10.1111/sapm.70269
ABSTRACT This paper investigates a reaction–diffusion–advection predator–prey model in heterogeneous environments, where the predator combines random diffusion with directed advection along prey resource gradients. Using principal eigenvalue analysis, we examine the impact of predator mortality, diffusion, and advection on invasion outcomes. A novel advection‐driven mechanism for predator–prey coexistence is identified, which is absent in models without advection. Moderate advection promotes predator invasion by enhancing resource tracking, while excessive advection hinders predator distribution and foraging, resulting in a nonmonotonic relationship between advection intensity and invasion success. This contrasts with traditional models and reveals how advection shapes predator–prey spatial distributions and modulates interaction dynamics, offering a fresh framework for ecological modeling.