Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/22505
Tipo: Artigo
Título: Mathematical analysis of a model for plant invasion mediated by allelopathy
Autor(es): Fassoni, A. C.
Martins, M. L.
Abstract: Exotic plants threaten the biodiversity of natural habitats and the integrity of agricultural systems throughout the World. Therefore, understanding, predicting and controlling plant invasions became issues of great practical importance. In the present paper, a model for plant invasion based on allelopathic suppression is proposed and studied through analytical methods and numerical integration. Employing linear stability analysis the conditions for plant coexistence as well as one species extinction were determined for the spatially homogeneous system. These conditions demonstrate the advantage conferred to the alien plant by its phytotoxin. It was shown that the system exhibits bistability between two distinct fixed points, either associated to species coexistence or to the extinction of one species. Numerical simulation is also included to support such results. Further, the invasion spreading starting from a single, spatially localized initial focus was investigated by numerical integration of the model's equations. As obtained for the spatially homogeneous system, at strong interspecific competition the outcome is the extinction of one plant species. In contrast, at low interspecific competition, the rule is the coexistence between the invader and native plants. So, under weak competition alien species can invade, but genetic diversity can be sustained.
Palavras-chave: Allelopathy
Plant invasion
Mathematical model
Bistability
Editor: Ecological Complexity
Tipo de Acesso: 2013 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ecocom.2013.03.004
http://www.locus.ufv.br/handle/123456789/22505
Data do documento: Jun-2014
Aparece nas coleções:Artigos

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
artigo.pdf
  Until 2100-12-31
texto completo2,89 MBAdobe PDFVisualizar/Abrir    Solictar uma cópia


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.