Poulin R., Guégan Jean-François. (2000). Nestedness, anti-nestedness, and the relationship between prevalence and intensity in ectoparasite assemblages of marine fish : a spatial model of species coexistence. International Journal for Parasitology, 30, p. 1147-1152. ISSN 0020-7519.
Titre du document
Nestedness, anti-nestedness, and the relationship between prevalence and intensity in ectoparasite assemblages of marine fish : a spatial model of species coexistence
Année de publication
2000
Type de document
Article
Auteurs
Poulin R., Guégan Jean-François
Source
International Journal for Parasitology, 2000,
30, p. 1147-1152 ISSN 0020-7519
Nested species subset patterns consist in a hierarchical structure of species composition in related assemblages, with the species found in depauperate assemblages representing non-random subsets of progressively richer ones. This pattern has been found at the infracommunity level in about a third of fish ectoparasites, anti-nestedness, which corresponds to situations in which parasite species are always absent from infracommunities richer than the most depauperate one in which they occur. We show that this pattern is exactly as common as nestedness, and that anti-nested assemblages are characterised by significantly lower prevalence and mean intensities of parasites than nested assemblages. In addition, we found a positive relationship between the prevalence and the mean intensity of parasites across the different assemblages. We propose a link between the nestedness/anti-nestedness continuum and the prevalence-intensity relationship that may involve colonisation-extinction processes. The results presented here suggest that, although nestedness may not be common in parasite communities, other departures from random species assembly are possible, and that some form of structure may be present in many communities. The continuum between nestedness and anti-nestedness also has implications for recent models of species coexistence in communities. (Résumé d'auteur)
Plan de classement
Synécologie [036MILMAR02]
Descripteurs
ECOLOGIE DES PARASITES ; ECTOPARASITE ; STRUCTURE DU PEUPLEMENT ; POISSON MARIN ; DISTRIBUTION QUANTITATIVE ; DISTRIBUTION SPATIALE ; HABITAT ; MILIEU MARIN ; RELATION HOTE PARASITE ; DIVERSITE SPECIFIQUE ; NICHE ECOLOGIQUE ; TEMPERATURE ; PHYLOGENIE ; MODELISATION ; BANC DE PARASITES ; INFRACOMMUNAUTE
