Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/38810
Título: Efeitos de preferência alimentar e aumento de produtividade na dinâmica de redes tróficas
Título(s) alternativo(s): Food preference and productivity enrichment effects on food web dynamics
Palavras-chave: Redes tróficas
Preferência alimentar
Produtividade primária
Estabilidade
Food web
Food preference
Primary productivity
Stability
Data do documento: Mar-2012
Editor: Universidade Federal do Rio de Janeiro
Citação: FARIA, L. D. B.; COSTA, M. I. da S. Efeitos de preferência alimentar e aumento de produtividade na dinâmica de redes tróficas. Oecologia Australis, [S.l.], v. 16, n. 1, p. 99-109, mar. 2012.
Resumo: Diversity and species coexistence can emerge as a consequence of several factors such as, predator’s prey preference, prey carrying capacity, predators’ mutual interference. In fact, interactions among three or more species are strongly influenced by direct and indirect interactions. Moreover, food webs usually display an intricate tangle of interactions containing multiple prey, which in turn gives rise to several food items for predators besides allocthonous inputs. Within this context, predator’s prey preference is commonly employed in mathematical models in order to investigate the interplay among food web structure, diversity, species coexistence and stability. A feature of these models is the categorization of the structure preference into two distinct forms: (1) fixed (“non-switching”); (2) variable (“switching”). The first one assumes that the predator has a fixed behavior with respect to the densities of its alternative prey, while the second is based on the relative densities of its alternative prey. This latter form is strictly related to the concept of predation risk – prey are more susceptible to predation when their densities are more elevated than those of their counterparts. Given these frameworks, the effects of these two preference structures and the augmentation of primary productivity on the ultimate dynamics of some specific food webs will be reviewed in this work.
URI: https://revistas.ufrj.br/index.php/oa/article/view/8196
http://repositorio.ufla.br/jspui/handle/1/38810
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