Optimisation of total population in logistic model with nonlocal dispersals and heterogeneous environments

Abstract

In this paper, we investigate the issue of maximizing the total equilibrium population with respect to resources distribution m(x) and diffusion rates d under the prescribed total amount of resources in a logistic model with nonlocal dispersals. Among other things, we show that for $d\ge 1$, there exist $C_0,C_1>0$, depending on the $\Vert m{\Vert }_{L^1}$ only, such that $$C_0\sqrt{d}<\mbox{supremum~ of~ total~ population}<C_1\sqrt{d}.$$ However, when replaced by random diffusion, a conjecture, proposed by Ni and justified in [3], indicates that in the one-dimensional case, supremum of total population$=3\Vert m{\Vert }_{L^1}$. This reflects serious discrepancies between models with local and nonlocal dispersal strategies.

22 pages. arXiv admin note: substantial text overlap with arXiv:2108.01826