Hugueny Bernard. (1989). West African rivers as biogeographic islands : species richness of fish communities. Oecologia, 79, p. 236-243. ISSN 0029-8549.
Titre du document
West African rivers as biogeographic islands : species richness of fish communities
Année de publication
1989
Type de document
Article
Auteurs
Hugueny Bernard
Source
Oecologia, 1989,
79, p. 236-243 ISSN 0029-8549
Some factors influencing the species richness of West African fish communities were studied in a sample of 26 rivers using four habitat and hydrologic variables. Analysis of a larger sample of 39 rivers showed that species richness was positively related to area. A power function with an exponent of 0.32 gave the best fit. As the surface area used was that of the catchment area and not that (unknown) of the river, the biological significance of this relationship and the possibilities of comparison were limited. Ridge regression analysis and forward stepwise selection indicated that a model that explained ln (species richness) as a function of ln (mean annual discharge) and ln (catchment surface area) was best, accounting for 90% of the variance of the dependent variable. (D'après résumé d'auteur)
Plan de classement
Dynamique de populations / modélisation [036EAUCON01]
Descripteurs
POISSON D'EAU DOUCE ; REPARTITION GEOGRAPHIQUE ; DIVERSITE SPECIFIQUE ; ANALYSE STATISTIQUE ; STRUCTURE DU PEUPLEMENT ; ZONE REFUGE
