@article{fdi:42798, title = {{W}est {A}frican rivers as biogeographic islands : species richness of fish communities}, author = {{H}ugueny, {B}ernard}, editor = {}, language = {{ENG}}, abstract = {{S}ome factors influencing the species richness of {W}est {A}frican fish communities were studied in a sample of 26 rivers using four habitat and hydrologic variables. {A}nalysis 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. {A}s 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. {R}idge 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}'apr{\`e}s r{\'e}sum{\'e} d'auteur)}, keywords = {{POISSON} {D}'{EAU} {DOUCE} ; {REPARTITION} {GEOGRAPHIQUE} ; {DIVERSITE} {SPECIFIQUE} ; {ANALYSE} {STATISTIQUE} ; {STRUCTURE} {DU} {PEUPLEMENT} ; {ZONE} {REFUGE} ; {AFRIQUE} {DE} {L}'{OUEST}}, booktitle = {}, journal = {{O}ecologia}, volume = {79}, numero = {}, pages = {236--243}, ISSN = {0029-8549}, year = {1989}, DOI = {10.1007/{BF}00388483}, URL = {https://www.documentation.ird.fr/hor/fdi:42798}, }