Trophic structure, stability, and parasite persistence threshold in food webs.
Bull Math Biol
; 75(11): 2196-207, 2013 Nov.
Article
em En
| MEDLINE
| ID: mdl-23943365
ABSTRACT
Food web structure of free-living species is an important determinant of parasite species richness. Downwardly asymmetric predator-prey interactions (where there are more prey than predator species) have been shown, both theoretically and empirically, to harbour more trophically transmitted parasite species than expected due to chance. Here, we demonstrate that this could be due to the increase in the basic reproductive ratio that the addition of non-host prey species to a system creates. However, we note that the basic reproductive ratio is only increased by those prey that stabilise oscillations in a predator-prey system, and is decreased by those that do not.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Cadeia Alimentar
/
Modelos Biológicos
Limite:
Animals
/
Humans
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article