Abstract
In semi-arid regions, the positive feedback effect of vegetation and soil moisture plays an indispensable role in the process of water absorption by vegetation roots, and vegetation can also absorb water through the nonlocal interaction of roots. So in this paper, we consider how the interactions of cross-diffusion and nonlocal delay affect the growth of vegetation. By mathematical analysis, the conditions under which Turing patterns occur are obtained for this vegetation-water model. At the same time, we obtain the amplitude equation near the Turing bifurcation boundary by using the multi-scale analysis method. Conditions for the emergence of Turing patterns such as stripes, spots, and mixtures of stripes and spots are identified through the stability analysis of amplitude equation. Some numerical simulations are given to illustrate the analytical results, especially the evolution processes of vegetation patterns depicted under different parameters.
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Funding
The work is supported by the National Natural Science Foundation of China (61872227, 12126420, 52276028), Postdoctoral Science Foundation of China (Grant No. 2022M711854), and Shuimu Tsinghua Scholar Program (Grant No. 2021SM062).
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GG and JW contributed to the conception of the study and wrote the main manuscript text. SZ and CZ prepared figures. All authors reviewed the manuscript.
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Guo, G., Wang, J., Zhao, S. et al. Interactions of cross-diffusion and nonlocal delay induce spatial vegetation patterning in semi-arid environments. Nonlinear Dyn (2024). https://doi.org/10.1007/s11071-024-09460-8
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DOI: https://doi.org/10.1007/s11071-024-09460-8