In this paper, we investigate the global dynamics of a Leslie-Gower predator-prey system in advective homogeneous environments. We discuss the existence and uniqueness of positive steady-state solutions. We study the large time behavior of solutions and establish threshold conditions for persistence and extinction of two species when they live in open advective environments. Numerical simulations indicate that the introduction of advection leads to the evolution of spatial distribution patterns of species and specially it may induce spatial separation of the prey and predator under some conditions.
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Figure 1. Bifurcation diagrams of steady state solutions to (3) in open advective environments with the bifurcation parameter $ q $. The fixed parameter values $ b = 1 $, $ a = 1, c = 10, L = 10 $. (a) $ d_1 = d_2 = 0.01,r_1 = 5,r_2 = 6 $; (b) $ d_1 = 0.1,d_2 = 0.15,r_1 = r_2 = 5 $; (c) $ d_1 = d_2 = 0.1,r_1 = r_2 = 16 $; (d) $ d_1 = d_2 = 0.15,r_1 = 5,r_2 = 2 $; (e) $ d_1 = 0.15,d_2 = 0.1,r_1 = r_2 = 12 $
Figure 2. Evolution of spatial distribution patterns on $ [0,L] $ with different advection speeds after a long time (t = 3000). Here $ b = 1 $ and $ q^*(d_1,r_1,b)\le q^*(d_2,r_2,b) $. The fixed parameter values $ a = 1, c = 10, L = 10,d_1 = 0.1,d_2 = 0.15,r_1 = r_2 = 5 $.(a) $ q = 1.7 $, (b) $ q = 1.9 $, (c) $ q = 2 $
Figure 3. Evolution of spatial distribution patterns on $ [0,L] $ with different advection speeds after a long time (t = 3000). Here $ b = 1 $ and $ q^*(d_1,r_1,b)>q^*(d_2,r_2,b) $. The fixed parameter values $ a = 1, c = 10, L = 10,d_1 = 0.15,d_2 = 0.1,r_1 = r_2 = 12 $. (a) $ q = 1.5 $, (b) $ q = 3.3 $, (c) $ q = 3.38 $, (d) $ q = 3.8 $, (e)$ q = 3.875 $, (f) $ q = 4 $
Figure 5. Evolution of the stable steady-state spatial distribution patterns of species on $ [0,L] $ with different advection speeds after a long time (t = 3000). Here $ b = 0 $. The fixed parameter values $ a = 1, c = 10, L = 10,d_1 = 0.15,d_2 = 0.1,r_1 = 30,r_2 = 9 $. (a) $ q = 0.1 $, (b) $ q = 2.5 $, (c) $ q = 3 $, (d) $ q = 7.2 $, (e) $ q = 20 $
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Bifurcation diagrams of steady state solutions to (3) in open advective environments with the bifurcation parameter
Evolution of spatial distribution patterns on
Evolution of spatial distribution patterns on
Bifurcation diagrams of steady state solutions to (3) with the bifurcation parameter
Evolution of the stable steady-state spatial distribution patterns of species on