“…(1.16) However, under some other geometrical conditions (when typically, the cross section is narrow and then becomes abruptly much wider), blocking phenomena can occur, in the sense of (1.15). Further propagation and/or blocking phenomena were also shown for bistable equations set in the real line R (with periodic heterogeneities [12,13,16,29,[39][40][41], with local defects [9,10,32,33,35,37], or with asymptotically distinct left and right environments [18]), as well as in straight infinite cylinders with non-constant drifts [19,20], and in some periodic domains [14] or the whole space with periodic coefficients [15,23]. In [36], a reaction-diffusion model was considered to analyse the effects on population persistence of simultaneous changes in the position and shape of a climate envelope.…”