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From the current literature


Bifurcations of travelling waves in population taxis models

,
Center of Problems of Forest Ecology and Productivity, Russian Academy of Sciences, Novocheremushkinskaya str. 69, Moscow, 117418, Russian Federation

A penetrating analysis of the wave dynamic modes of a conceptual population system described by the ’reaction-taxis-diffusion’ and ’reaction-autotaxis-cross-diffusion’ polynomial models is carried out for the case of increasing degrees of the reaction and taxis (autotaxis) functions. It is shown that a ’suitable’ nonlinear taxis can affect the wave front sets and generate nonmonotone waves, such as trains and pulses which represent the exact solutions of the model system. Parametric critical points whose neighborhood displays the full spectrum of possible model wave regimes are identified and a wave mode systematization in the form of bifurcation diagrams is given. This enables standard criteria of approach to ’dangerous boundaries’ to be developed. As possible applications, ’pulsing density patches’ in forest insect populations as well as plankton communities and some other examples are discussed.

Fulltext pdf (542 KB)
Fulltext is also available at DOI: 10.1070/PU1999v042n09ABEH000564
PACS: 05.45.−a, 87.10.+e, 87.23.Cc (all)
DOI: 10.1070/PU1999v042n09ABEH000564
URL: https://ufn.ru/en/articles/1999/9/d/
000083399000004
Citation: Berezovskaya F S, Karev G P "Bifurcations of travelling waves in population taxis models" Phys. Usp. 42 917–929 (1999)
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Оригинал: Березовская Ф С, Карев Г П «Бифуркации бегущих волн в популяционных моделях с таксисом» УФН 169 1011–1024 (1999); DOI: 10.3367/UFNr.0169.199909d.1011

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