Journal
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
Volume 498, Issue 2, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmaa.2021.124983
Keywords
Rosenzweig-MacArthur model; Nonlinear reaction-diffusion system; Predator-prey model; Refuge
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Funding
- Department of Mathematics and Statistics
- National Science Foundation [DMS-1816783]
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A spatial Rosenzweig-MacArthur model was studied under certain assumptions, showing the existence of positive solutions at the steady state through bifurcation analysis. Results indicate that models with linear and nonlinear diffusion for prey have similar positive solution curves near the bifurcation point, but diverge significantly as the bifurcation parameter approaches zero.
We study a spatial (two-dimensional) Rosenzweig-MacArthur model under the following assumptions: (1) prey spread follows a nonlinear diffusion rule, (2) preys have a refuge zone (sometimes called protection zone) where predators cannot enter, (3) predators move following linear diffusion. We present a bifurcation analysis for the system that shows the existence of positive solutions at the steady state. We complement the theoretical results with numerical computations and compare our results with those obtained in the case of having linear diffusion for the prey movement. Our results show that both models, with linear and nonlinear diffusion for the prey, have the same bifurcation point and the positive solution curves are virtually the same in a neighborhood of this point, but they get drastically different as the bifurcation parameter approaches zero. (C) 2021 Elsevier Inc. All rights reserved.
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