Global dynamics of a size-structured forest model
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866913199360573440 |
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| author | Herrera, Franco Trofimchuk, Sergei |
| author_facet | Herrera, Franco Trofimchuk, Sergei |
| contents | We study a size-structured model proposed in [1] C. Barril, À. Calsina, O. Diekmann, J. Z. Farkas, On competition through growth reduction, e-print arXiv:2303.02981, to describe the dynamics of trees growth in the forest. Our approach to the associated renewal equation is rather different from the methods in [1] and is based on ideas developed in [2] F. Herrera, S. Trofimchuk, Dynamics of one-dimensional maps and Gurtin-MacCamy's population model. Part I: asymptotically constant solutions, Ukrainian Math. J., (in Memory of O. Sharkovsky), 75 (2023), 1635-1651, https://doi.org/10.3842/umzh.v75i12.7678. Assuming relatively weak restrictions on the reproduction, death and growth rates $β, μ, g$, we establish the permanence properties of the semiflow $\frak F^t$ generated by the renewal equation and prove that it possesses a compact global attractor of points $\mathcal A$. Next we show that the opposite types of monotonicity of $β, g$ assure that $\frak F^t$ is also monotone and that in this case $\mathcal A$ coincides with a unique asymptotically stable equilibrium attracting neighbourhoods of compact sets with non-zero initial data. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_08618 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Global dynamics of a size-structured forest model Herrera, Franco Trofimchuk, Sergei Dynamical Systems 34K12, 92D25 We study a size-structured model proposed in [1] C. Barril, À. Calsina, O. Diekmann, J. Z. Farkas, On competition through growth reduction, e-print arXiv:2303.02981, to describe the dynamics of trees growth in the forest. Our approach to the associated renewal equation is rather different from the methods in [1] and is based on ideas developed in [2] F. Herrera, S. Trofimchuk, Dynamics of one-dimensional maps and Gurtin-MacCamy's population model. Part I: asymptotically constant solutions, Ukrainian Math. J., (in Memory of O. Sharkovsky), 75 (2023), 1635-1651, https://doi.org/10.3842/umzh.v75i12.7678. Assuming relatively weak restrictions on the reproduction, death and growth rates $β, μ, g$, we establish the permanence properties of the semiflow $\frak F^t$ generated by the renewal equation and prove that it possesses a compact global attractor of points $\mathcal A$. Next we show that the opposite types of monotonicity of $β, g$ assure that $\frak F^t$ is also monotone and that in this case $\mathcal A$ coincides with a unique asymptotically stable equilibrium attracting neighbourhoods of compact sets with non-zero initial data. |
| title | Global dynamics of a size-structured forest model |
| topic | Dynamical Systems 34K12, 92D25 |
| url | https://arxiv.org/abs/2401.08618 |