Mellin C. auteur aut IRD Ferraris Jocelyne auteur aut IRD Galzin R. auteur aut IRD Harmelin-Vivien M. auteur aut IRD Kulbicki Michel auteur aut IRD Loma de T. L. auteur aut IRD text journalArticle eng text/pdf born digital access Despite the rapid rate of human-induced species losses, the relative influence of natural and anthropogenic factors on the functional diversity of species assemblages remains unknown for most ecosystems. A model was previously developed to predict the diversity structure of coral reef fish assemblages in 10 atolls of low human pressure and contrasting morphology of the Tuamotu Archipelago (French Polynesia). This existing model predicted smoothed histograms (spectra) of species richness according to size classes, diet classes and life-history classes of fish assemblages using a combination of environmental characteristics at different spatial scales. The present study applied the model to Tikehau, another atoll of the same archipelago where commercial fishing is practiced and where the same sampling strategy was reproduced. Significant differences appeared between predicted and observed species richness in several size, diet and lifehistory classes of fish assemblages in Tikehau. Two parameters which were not accounted for in the initial model, i.e. fishing pressure and atoll position within the archipelago, explained together 63% of variance in model residuals, >60% being explained by fishing pressure only. The respective effects of fishing and atoll position on the diversity of coral reef fish assemblages are discussed, with the potential of such modelling approach to assess the relative importance of factors affecting functional diversity within communities. specialized Atoll Coral reef Diversity Ecem 07 Fish Species richness 036 082 218 1-2 182-187 2008 0304-3800 https://www.documentation.ird.fr/hor/fdi:010044058 10.1016/j.ecolmodel.2008.07.021 0304-3800 [F B010044058] https://www.documentation.ird.fr/hor/fdi:010044058 https://www.documentation.ird.fr/intranet/publi/2008/11/010044058.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2008-12-05 2017-08-23 fdi:010044058 fre